2096 lines
88 KiB
Markdown
2096 lines
88 KiB
Markdown
---
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reading_time: true
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stage: Enablement
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group: Distribution
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info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
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---
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# Reference architecture: up to 3,000 users **(PREMIUM SELF)**
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This GitLab reference architecture can help you deploy GitLab to up to 3,000
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users, and then maintain uptime and access for those users. You can also use
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this architecture to provide improved GitLab uptime and availability for fewer
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than 3,000 users. For fewer users, reduce the stated node sizes as needed.
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If maintaining a high level of uptime for your GitLab environment isn't a
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requirement, or if you don't have the expertise to maintain this sort of
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environment, we recommend using the non-HA [2,000-user reference architecture](2k_users.md)
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for your GitLab installation. If HA is still a requirement, there's several supported
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tweaks you can make to this architecture to reduce complexity as detailed here.
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For a full list of reference architectures, see
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[Available reference architectures](index.md#available-reference-architectures).
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> - **Supported users (approximate):** 3,000
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> - **High Availability:** Yes, although [Praefect](#configure-praefect-postgresql) needs a third-party PostgreSQL solution
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> - **Test requests per second (RPS) rates:** API: 60 RPS, Web: 6 RPS, Git (Pull): 6 RPS, Git (Push): 1 RPS
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| Service | Nodes | Configuration | GCP | AWS | Azure |
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|--------------------------------------------|-------------|-----------------------|-----------------|--------------|----------|
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| External load balancing node(3) | 1 | 2 vCPU, 1.8 GB memory | `n1-highcpu-2` | `c5.large` | `F2s v2` |
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| Redis(2) | 3 | 2 vCPU, 7.5 GB memory | `n1-standard-2` | `m5.large` | `D2s v3` |
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| Consul(1) + Sentinel(2) | 3 | 2 vCPU, 1.8 GB memory | `n1-highcpu-2` | `c5.large` | `F2s v2` |
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| PostgreSQL(1) | 3 | 2 vCPU, 7.5 GB memory | `n1-standard-2` | `m5.large` | `D2s v3` |
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| PgBouncer(1) | 3 | 2 vCPU, 1.8 GB memory | `n1-highcpu-2` | `c5.large` | `F2s v2` |
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| Internal load balancing node(3) | 1 | 2 vCPU, 1.8 GB memory | `n1-highcpu-2` | `c5.large` | `F2s v2` |
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| Gitaly | 3 | 4 vCPU, 15 GB memory | `n1-standard-4` | `m5.xlarge` | `D4s v3` |
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| Praefect | 3 | 2 vCPU, 1.8 GB memory | `n1-highcpu-2` | `c5.large` | `F2s v2` |
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| Praefect PostgreSQL(1) | 1+ | 2 vCPU, 1.8 GB memory | `n1-highcpu-2` | `c5.large` | `F2s v2` |
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| Sidekiq | 4 | 2 vCPU, 7.5 GB memory | `n1-standard-2` | `m5.large` | `D2s v3` |
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| GitLab Rails | 3 | 8 vCPU, 7.2 GB memory | `n1-highcpu-8` | `c5.2xlarge` | `F8s v2` |
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| Monitoring node | 1 | 2 vCPU, 1.8 GB memory | `n1-highcpu-2` | `c5.large` | `F2s v2` |
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| Object storage(4) | n/a | n/a | n/a | n/a | n/a |
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| NFS server (optional, not recommended) | 1 | 4 vCPU, 3.6 GB memory | `n1-highcpu-4` | `c5.xlarge` | `F4s v2` |
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<!-- Disable ordered list rule https://github.com/DavidAnson/markdownlint/blob/main/doc/Rules.md#md029---ordered-list-item-prefix -->
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<!-- markdownlint-disable MD029 -->
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1. Can be optionally run on reputable third-party external PaaS PostgreSQL solutions. Google Cloud SQL and AWS RDS are known to work, however Azure Database for PostgreSQL is [not recommended](https://gitlab.com/gitlab-org/quality/reference-architectures/-/issues/61) due to performance issues. Consul is primarily used for PostgreSQL high availability so can be ignored when using a PostgreSQL PaaS setup. However it is also used optionally by Prometheus for Omnibus auto host discovery.
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2. Can be optionally run on reputable third-party external PaaS Redis solutions. Google Memorystore and AWS Elasticache are known to work.
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3. Can be optionally run on reputable third-party load balancing services (LB PaaS). AWS ELB is known to work.
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4. Should be run on reputable third party object storage (storage PaaS) for cloud implementations. Google Cloud Storage and AWS S3 are known to work.
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<!-- markdownlint-enable MD029 -->
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NOTE:
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For all PaaS solutions that involve configuring instances, it is strongly recommended to implement a minimum of three nodes in three different availability zones to align with resilient cloud architecture practices.
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```plantuml
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@startuml 3k
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card "**External Load Balancer**" as elb #6a9be7
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card "**Internal Load Balancer**" as ilb #9370DB
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together {
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collections "**GitLab Rails** x3" as gitlab #32CD32
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collections "**Sidekiq** x4" as sidekiq #ff8dd1
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}
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together {
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card "**Prometheus + Grafana**" as monitor #7FFFD4
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collections "**Consul** x3" as consul #e76a9b
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}
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card "Gitaly Cluster" as gitaly_cluster {
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collections "**Praefect** x3" as praefect #FF8C00
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collections "**Gitaly** x3" as gitaly #FF8C00
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card "**Praefect PostgreSQL***\n//Non fault-tolerant//" as praefect_postgres #FF8C00
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praefect -[#FF8C00]-> gitaly
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praefect -[#FF8C00]> praefect_postgres
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}
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card "Database" as database {
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collections "**PGBouncer** x3" as pgbouncer #4EA7FF
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card "**PostgreSQL** (Primary)" as postgres_primary #4EA7FF
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collections "**PostgreSQL** (Secondary) x2" as postgres_secondary #4EA7FF
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pgbouncer -[#4EA7FF]-> postgres_primary
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postgres_primary .[#4EA7FF]> postgres_secondary
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}
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card "redis" as redis {
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collections "**Redis Persistent** x3" as redis_persistent #FF6347
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collections "**Redis Cache** x3" as redis_cache #FF6347
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collections "**Redis Persistent Sentinel** x3" as redis_persistent_sentinel #FF6347
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collections "**Redis Cache Sentinel** x3"as redis_cache_sentinel #FF6347
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redis_persistent <.[#FF6347]- redis_persistent_sentinel
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redis_cache <.[#FF6347]- redis_cache_sentinel
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}
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cloud "**Object Storage**" as object_storage #white
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elb -[#6a9be7]-> gitlab
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elb -[#6a9be7]--> monitor
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gitlab -[#32CD32]> sidekiq
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gitlab -[#32CD32]--> ilb
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gitlab -[#32CD32]-> object_storage
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gitlab -[#32CD32]---> redis
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gitlab -[hidden]-> monitor
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gitlab -[hidden]-> consul
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sidekiq -[#ff8dd1]--> ilb
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sidekiq -[#ff8dd1]-> object_storage
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sidekiq -[#ff8dd1]---> redis
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sidekiq -[hidden]-> monitor
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sidekiq -[hidden]-> consul
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ilb -[#9370DB]-> gitaly_cluster
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ilb -[#9370DB]-> database
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consul .[#e76a9b]u-> gitlab
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consul .[#e76a9b]u-> sidekiq
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consul .[#e76a9b]> monitor
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consul .[#e76a9b]-> database
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consul .[#e76a9b]-> gitaly_cluster
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consul .[#e76a9b,norank]--> redis
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monitor .[#7FFFD4]u-> gitlab
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monitor .[#7FFFD4]u-> sidekiq
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monitor .[#7FFFD4]> consul
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monitor .[#7FFFD4]-> database
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monitor .[#7FFFD4]-> gitaly_cluster
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monitor .[#7FFFD4,norank]--> redis
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monitor .[#7FFFD4]> ilb
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monitor .[#7FFFD4,norank]u--> elb
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@enduml
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```
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The Google Cloud Platform (GCP) architectures were built and tested using the
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[Intel Xeon E5 v3 (Haswell)](https://cloud.google.com/compute/docs/cpu-platforms)
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CPU platform. On different hardware you may find that adjustments, either lower
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or higher, are required for your CPU or node counts. For more information, see
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our [Sysbench](https://github.com/akopytov/sysbench)-based
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[CPU benchmarks](https://gitlab.com/gitlab-org/quality/performance/-/wikis/Reference-Architectures/GCP-CPU-Benchmarks).
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Due to better performance and availability, for data objects (such as LFS,
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uploads, or artifacts), using an [object storage service](#configure-the-object-storage)
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is recommended instead of using NFS. Using an object storage service also
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doesn't require you to provision and maintain a node.
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[Praefect requires its own database server](../gitaly/praefect.md#postgresql),
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and a third-party PostgreSQL database solution is required to achieve full
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high availability. Although we hope to offer a built-in solution for these
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restrictions in the future, you can set up a non-HA PostgreSQL server by using
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Omnibus GitLab (which the previous specifications reflect). Refer to the
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following issues for more information:
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- [`omnibus-gitlab#5919`](https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/5919)
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- [`gitaly#3398`](https://gitlab.com/gitlab-org/gitaly/-/issues/3398)
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## Setup components
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To set up GitLab and its components to accommodate up to 3,000 users:
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1. [Configure the external load balancer](#configure-the-external-load-balancer)
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to handle the load balancing of the GitLab application services nodes.
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1. [Configure the internal load balancer](#configure-the-internal-load-balancer).
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to handle the load balancing of GitLab application internal connections.
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1. [Configure Redis](#configure-redis).
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1. [Configure Consul and Sentinel](#configure-consul-and-sentinel).
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1. [Configure PostgreSQL](#configure-postgresql), the database for GitLab.
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1. [Configure PgBouncer](#configure-pgbouncer).
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1. [Configure Gitaly Cluster](#configure-gitaly-cluster),
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provides access to the Git repositories.
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1. [Configure Sidekiq](#configure-sidekiq).
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1. [Configure the main GitLab Rails application](#configure-gitlab-rails)
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to run Puma, Workhorse, GitLab Shell, and to serve all frontend
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requests (which include UI, API, and Git over HTTP/SSH).
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1. [Configure Prometheus](#configure-prometheus) to monitor your GitLab
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environment.
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1. [Configure the object storage](#configure-the-object-storage)
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used for shared data objects.
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1. [Configure Advanced Search](#configure-advanced-search) (optional) for faster,
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more advanced code search across your entire GitLab instance.
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1. [Configure NFS](#configure-nfs-optional) (optional, and not recommended)
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to have shared disk storage service as an alternative to Gitaly or object
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storage. You can skip this step if you're not using GitLab Pages (which
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requires NFS).
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The servers start on the same 10.6.0.0/24 private network range, and can
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connect to each other freely on these addresses.
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The following list includes descriptions of each server and its assigned IP:
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- `10.6.0.10`: External Load Balancer
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- `10.6.0.61`: Redis Primary
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- `10.6.0.62`: Redis Replica 1
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- `10.6.0.63`: Redis Replica 2
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- `10.6.0.11`: Consul/Sentinel 1
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- `10.6.0.12`: Consul/Sentinel 2
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- `10.6.0.13`: Consul/Sentinel 3
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- `10.6.0.31`: PostgreSQL primary
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- `10.6.0.32`: PostgreSQL secondary 1
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- `10.6.0.33`: PostgreSQL secondary 2
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- `10.6.0.21`: PgBouncer 1
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- `10.6.0.22`: PgBouncer 2
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- `10.6.0.23`: PgBouncer 3
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- `10.6.0.20`: Internal Load Balancer
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- `10.6.0.51`: Gitaly 1
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- `10.6.0.52`: Gitaly 2
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- `10.6.0.93`: Gitaly 3
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- `10.6.0.131`: Praefect 1
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- `10.6.0.132`: Praefect 2
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- `10.6.0.133`: Praefect 3
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- `10.6.0.141`: Praefect PostgreSQL 1 (non HA)
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- `10.6.0.71`: Sidekiq 1
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- `10.6.0.72`: Sidekiq 2
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- `10.6.0.73`: Sidekiq 3
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- `10.6.0.74`: Sidekiq 4
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- `10.6.0.41`: GitLab application 1
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- `10.6.0.42`: GitLab application 2
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- `10.6.0.43`: GitLab application 3
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- `10.6.0.81`: Prometheus
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## Configure the external load balancer
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In a multi-node GitLab configuration, you'll need a load balancer to route
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traffic to the application servers. The specifics on which load balancer to use
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or its exact configuration is beyond the scope of GitLab documentation. We assume
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that if you're managing multi-node systems like GitLab, you already have a load
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balancer of choice and that the routing methods used are distributing calls evenly
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between all nodes. Some load balancer examples include HAProxy (open-source),
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F5 Big-IP LTM, and Citrix Net Scaler. This documentation outline the ports and
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protocols needed for use with GitLab.
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This architecture has been tested and validated with [HAProxy](https://www.haproxy.org/)
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as the load balancer. Although other load balancers with similar feature sets
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could also be used, those load balancers have not been validated.
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The next question is how you will handle SSL in your environment.
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There are several different options:
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- [The application node terminates SSL](#application-node-terminates-ssl).
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- [The load balancer terminates SSL without backend SSL](#load-balancer-terminates-ssl-without-backend-ssl)
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and communication is not secure between the load balancer and the application node.
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- [The load balancer terminates SSL with backend SSL](#load-balancer-terminates-ssl-with-backend-ssl)
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and communication is *secure* between the load balancer and the application node.
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### Application node terminates SSL
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Configure your load balancer to pass connections on port 443 as `TCP` rather
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than `HTTP(S)` protocol. This will pass the connection to the application node's
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NGINX service untouched. NGINX will have the SSL certificate and listen on port 443.
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See the [NGINX HTTPS documentation](https://docs.gitlab.com/omnibus/settings/nginx.html#enable-https)
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for details on managing SSL certificates and configuring NGINX.
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### Load balancer terminates SSL without backend SSL
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Configure your load balancer to use the `HTTP(S)` protocol rather than `TCP`.
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The load balancer will then be responsible for managing SSL certificates and
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terminating SSL.
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Since communication between the load balancer and GitLab will not be secure,
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there is some additional configuration needed. See the
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[NGINX proxied SSL documentation](https://docs.gitlab.com/omnibus/settings/nginx.html#supporting-proxied-ssl)
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for details.
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### Load balancer terminates SSL with backend SSL
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Configure your load balancer(s) to use the 'HTTP(S)' protocol rather than 'TCP'.
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The load balancer(s) will be responsible for managing SSL certificates that
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end users will see.
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Traffic will also be secure between the load balancer(s) and NGINX in this
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scenario. There is no need to add configuration for proxied SSL since the
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connection will be secure all the way. However, configuration will need to be
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added to GitLab to configure SSL certificates. See
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[NGINX HTTPS documentation](https://docs.gitlab.com/omnibus/settings/nginx.html#enable-https)
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for details on managing SSL certificates and configuring NGINX.
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### Readiness checks
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Ensure the external load balancer only routes to working services with built
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in monitoring endpoints. The [readiness checks](../../user/admin_area/monitoring/health_check.md)
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all require [additional configuration](../monitoring/ip_whitelist.md)
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on the nodes being checked, otherwise, the external load balancer will not be able to
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connect.
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### Ports
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The basic ports to be used are shown in the table below.
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| LB Port | Backend Port | Protocol |
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| ------- | ------------ | ------------------------ |
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| 80 | 80 | HTTP (*1*) |
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| 443 | 443 | TCP or HTTPS (*1*) (*2*) |
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| 22 | 22 | TCP |
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- (*1*): [Web terminal](../../ci/environments/index.md#web-terminals) support requires
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your load balancer to correctly handle WebSocket connections. When using
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HTTP or HTTPS proxying, this means your load balancer must be configured
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to pass through the `Connection` and `Upgrade` hop-by-hop headers. See the
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[web terminal](../integration/terminal.md) integration guide for
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more details.
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- (*2*): When using HTTPS protocol for port 443, you will need to add an SSL
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certificate to the load balancers. If you wish to terminate SSL at the
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GitLab application server instead, use TCP protocol.
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If you're using GitLab Pages with custom domain support you will need some
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additional port configurations.
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GitLab Pages requires a separate virtual IP address. Configure DNS to point the
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`pages_external_url` from `/etc/gitlab/gitlab.rb` at the new virtual IP address. See the
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[GitLab Pages documentation](../pages/index.md) for more information.
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| LB Port | Backend Port | Protocol |
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| ------- | ------------- | --------- |
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| 80 | Varies (*1*) | HTTP |
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| 443 | Varies (*1*) | TCP (*2*) |
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- (*1*): The backend port for GitLab Pages depends on the
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`gitlab_pages['external_http']` and `gitlab_pages['external_https']`
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setting. See [GitLab Pages documentation](../pages/index.md) for more details.
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- (*2*): Port 443 for GitLab Pages should always use the TCP protocol. Users can
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configure custom domains with custom SSL, which would not be possible
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if SSL was terminated at the load balancer.
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#### Alternate SSH Port
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Some organizations have policies against opening SSH port 22. In this case,
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it may be helpful to configure an alternate SSH hostname that allows users
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to use SSH on port 443. An alternate SSH hostname will require a new virtual IP address
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compared to the other GitLab HTTP configuration above.
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Configure DNS for an alternate SSH hostname such as `altssh.gitlab.example.com`.
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| LB Port | Backend Port | Protocol |
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| ------- | ------------ | -------- |
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| 443 | 22 | TCP |
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<div align="right">
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<a type="button" class="btn btn-default" href="#setup-components">
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Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i>
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</a>
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</div>
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## Configure the internal load balancer
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The Internal Load Balancer is used to balance any internal connections the GitLab environment requires
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such as connections to [PgBouncer](#configure-pgbouncer) and [Praefect](#configure-praefect) (Gitaly Cluster).
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Note that it's a separate node from the External Load Balancer and shouldn't have any access externally.
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The following IP will be used as an example:
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- `10.6.0.40`: Internal Load Balancer
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Here's how you could do it with [HAProxy](https://www.haproxy.org/):
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```plaintext
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global
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log /dev/log local0
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log localhost local1 notice
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log stdout format raw local0
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defaults
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log global
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default-server inter 10s fall 3 rise 2
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balance leastconn
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frontend internal-pgbouncer-tcp-in
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bind *:6432
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mode tcp
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option tcplog
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default_backend pgbouncer
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frontend internal-praefect-tcp-in
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bind *:2305
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mode tcp
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option tcplog
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option clitcpka
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default_backend praefect
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backend pgbouncer
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mode tcp
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option tcp-check
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server pgbouncer1 10.6.0.21:6432 check
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server pgbouncer2 10.6.0.22:6432 check
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server pgbouncer3 10.6.0.23:6432 check
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backend praefect
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mode tcp
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option tcp-check
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option srvtcpka
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server praefect1 10.6.0.131:2305 check
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server praefect2 10.6.0.132:2305 check
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server praefect3 10.6.0.133:2305 check
|
|
```
|
|
|
|
Refer to your preferred Load Balancer's documentation for further guidance.
|
|
Also ensure that the routing methods used are distributing calls evenly across
|
|
all nodes.
|
|
|
|
<div align="right">
|
|
<a type="button" class="btn btn-default" href="#setup-components">
|
|
Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i>
|
|
</a>
|
|
</div>
|
|
|
|
## Configure Redis
|
|
|
|
Using [Redis](https://redis.io/) in scalable environment is possible using a **Primary** x **Replica**
|
|
topology with a [Redis Sentinel](https://redis.io/topics/sentinel) service to watch and automatically
|
|
start the failover procedure.
|
|
|
|
Redis requires authentication if used with Sentinel. See
|
|
[Redis Security](https://redis.io/topics/security) documentation for more
|
|
information. We recommend using a combination of a Redis password and tight
|
|
firewall rules to secure your Redis service.
|
|
You are highly encouraged to read the [Redis Sentinel](https://redis.io/topics/sentinel) documentation
|
|
before configuring Redis with GitLab to fully understand the topology and
|
|
architecture.
|
|
|
|
In this section, you'll be guided through configuring an external Redis instance
|
|
to be used with GitLab. The following IPs will be used as an example:
|
|
|
|
- `10.6.0.61`: Redis Primary
|
|
- `10.6.0.62`: Redis Replica 1
|
|
- `10.6.0.63`: Redis Replica 2
|
|
|
|
### Provide your own Redis instance
|
|
|
|
Managed Redis from cloud providers such as AWS ElastiCache will work. If these
|
|
services support high availability, be sure it is **not** the Redis Cluster type.
|
|
|
|
Redis version 5.0 or higher is required, as this is what ships with
|
|
Omnibus GitLab packages starting with GitLab 13.0. Older Redis versions
|
|
do not support an optional count argument to SPOP which is now required for
|
|
[Merge Trains](../../ci/merge_request_pipelines/pipelines_for_merged_results/merge_trains/index.md).
|
|
|
|
Note the Redis node's IP address or hostname, port, and password (if required).
|
|
These will be necessary when configuring the
|
|
[GitLab application servers](#configure-gitlab-rails) later.
|
|
|
|
### Standalone Redis using Omnibus GitLab
|
|
|
|
This is the section where we install and set up the new Redis instances.
|
|
|
|
The requirements for a Redis setup are the following:
|
|
|
|
1. All Redis nodes must be able to talk to each other and accept incoming
|
|
connections over Redis (`6379`) and Sentinel (`26379`) ports (unless you
|
|
change the default ones).
|
|
1. The server that hosts the GitLab application must be able to access the
|
|
Redis nodes.
|
|
1. Protect the nodes from access from external networks
|
|
([Internet](https://gitlab.com/gitlab-org/gitlab-foss/uploads/c4cc8cd353604bd80315f9384035ff9e/The_Internet_IT_Crowd.png)),
|
|
using a firewall.
|
|
|
|
Both the primary and replica Redis nodes need the same password defined in
|
|
`redis['password']`. At any time during a failover, the Sentinels can reconfigure
|
|
a node and change its status from primary to replica (and vice versa).
|
|
|
|
#### Configuring the primary Redis instance
|
|
|
|
1. SSH in to the **Primary** Redis server.
|
|
1. [Download and install](https://about.gitlab.com/install/) the Omnibus GitLab
|
|
package of your choice. Be sure to both follow _only_ installation steps 1 and 2
|
|
on the page, and to select the correct Omnibus GitLab package, with the same version
|
|
and type (Community or Enterprise editions) as your current install.
|
|
1. Edit `/etc/gitlab/gitlab.rb` and add the contents:
|
|
|
|
```ruby
|
|
# Specify server role as 'redis_master_role' and enable Consul agent
|
|
roles(['redis_master_role', 'consul_role'])
|
|
|
|
# IP address pointing to a local IP that the other machines can reach to.
|
|
# You can also set bind to '0.0.0.0' which listen in all interfaces.
|
|
# If you really need to bind to an external accessible IP, make
|
|
# sure you add extra firewall rules to prevent unauthorized access.
|
|
redis['bind'] = '10.6.0.61'
|
|
|
|
# Define a port so Redis can listen for TCP requests which will allow other
|
|
# machines to connect to it.
|
|
redis['port'] = 6379
|
|
|
|
# Set up password authentication for Redis (use the same password in all nodes).
|
|
redis['password'] = 'redis-password-goes-here'
|
|
|
|
## Enable service discovery for Prometheus
|
|
consul['monitoring_service_discovery'] = true
|
|
|
|
## The IPs of the Consul server nodes
|
|
## You can also use FQDNs and intermix them with IPs
|
|
consul['configuration'] = {
|
|
retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13),
|
|
}
|
|
|
|
# Set the network addresses that the exporters will listen on
|
|
node_exporter['listen_address'] = '0.0.0.0:9100'
|
|
redis_exporter['listen_address'] = '0.0.0.0:9121'
|
|
redis_exporter['flags'] = {
|
|
'redis.addr' => 'redis://10.6.0.61:6379',
|
|
'redis.password' => 'redis-password-goes-here',
|
|
}
|
|
|
|
# Prevent database migrations from running on upgrade automatically
|
|
gitlab_rails['auto_migrate'] = false
|
|
```
|
|
|
|
1. Copy the `/etc/gitlab/gitlab-secrets.json` file from the first Omnibus node you configured and add or replace
|
|
the file of the same name on this server. If this is the first Omnibus node you are configuring then you can skip this step.
|
|
|
|
1. [Reconfigure Omnibus GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect.
|
|
|
|
You can specify multiple roles, like sentinel and Redis, as:
|
|
`roles ['redis_sentinel_role', 'redis_master_role']`. Read more about
|
|
[roles](https://docs.gitlab.com/omnibus/roles/).
|
|
|
|
You can list the current Redis Primary, Replica status by using:
|
|
|
|
```shell
|
|
/opt/gitlab/embedded/bin/redis-cli -h <host> -a 'redis-password-goes-here' info replication
|
|
```
|
|
|
|
Show running GitLab services by using:
|
|
|
|
```shell
|
|
gitlab-ctl status
|
|
```
|
|
|
|
The output should be similar to the following:
|
|
|
|
```plaintext
|
|
run: consul: (pid 30043) 76863s; run: log: (pid 29691) 76892s
|
|
run: logrotate: (pid 31152) 3070s; run: log: (pid 29595) 76908s
|
|
run: node-exporter: (pid 30064) 76862s; run: log: (pid 29624) 76904s
|
|
run: redis: (pid 30070) 76861s; run: log: (pid 29573) 76914s
|
|
run: redis-exporter: (pid 30075) 76861s; run: log: (pid 29674) 76896s
|
|
```
|
|
|
|
#### Configuring the replica Redis instances
|
|
|
|
1. SSH in to the **replica** Redis server.
|
|
1. [Download and install](https://about.gitlab.com/install/) the Omnibus GitLab
|
|
package of your choice. Be sure to both follow _only_ installation steps 1 and 2
|
|
on the page, and to select the correct Omnibus GitLab package, with the same version
|
|
and type (Community or Enterprise editions) as your current install.
|
|
1. Edit `/etc/gitlab/gitlab.rb` and add the contents:
|
|
|
|
```ruby
|
|
# Specify server role as 'redis_replica_role' and enable Consul agent
|
|
roles(['redis_replica_role', 'consul_role'])
|
|
|
|
# IP address pointing to a local IP that the other machines can reach to.
|
|
# You can also set bind to '0.0.0.0' which listen in all interfaces.
|
|
# If you really need to bind to an external accessible IP, make
|
|
# sure you add extra firewall rules to prevent unauthorized access.
|
|
redis['bind'] = '10.6.0.62'
|
|
|
|
# Define a port so Redis can listen for TCP requests which will allow other
|
|
# machines to connect to it.
|
|
redis['port'] = 6379
|
|
|
|
# The same password for Redis authentication you set up for the primary node.
|
|
redis['password'] = 'redis-password-goes-here'
|
|
|
|
# The IP of the primary Redis node.
|
|
redis['master_ip'] = '10.6.0.61'
|
|
|
|
# Port of primary Redis server, uncomment to change to non default. Defaults
|
|
# to `6379`.
|
|
#redis['master_port'] = 6379
|
|
|
|
## Enable service discovery for Prometheus
|
|
consul['monitoring_service_discovery'] = true
|
|
|
|
## The IPs of the Consul server nodes
|
|
## You can also use FQDNs and intermix them with IPs
|
|
consul['configuration'] = {
|
|
retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13),
|
|
}
|
|
|
|
# Set the network addresses that the exporters will listen on
|
|
node_exporter['listen_address'] = '0.0.0.0:9100'
|
|
redis_exporter['listen_address'] = '0.0.0.0:9121'
|
|
redis_exporter['flags'] = {
|
|
'redis.addr' => 'redis://10.6.0.62:6379',
|
|
'redis.password' => 'redis-password-goes-here',
|
|
}
|
|
|
|
# Prevent database migrations from running on upgrade automatically
|
|
gitlab_rails['auto_migrate'] = false
|
|
```
|
|
|
|
1. Copy the `/etc/gitlab/gitlab-secrets.json` file from the first Omnibus node you configured and add or replace
|
|
the file of the same name on this server. If this is the first Omnibus node you are configuring then you can skip this step.
|
|
|
|
1. [Reconfigure Omnibus GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect.
|
|
1. Go through the steps again for all the other replica nodes, and
|
|
make sure to set up the IPs correctly.
|
|
|
|
You can specify multiple roles, like sentinel and Redis, as:
|
|
`roles(['redis_sentinel_role', 'redis_master_role'])`. Read more about
|
|
[roles](https://docs.gitlab.com/omnibus/roles/).
|
|
|
|
These values don't have to be changed again in `/etc/gitlab/gitlab.rb` after
|
|
a failover, as the nodes will be managed by the [Sentinels](#configure-consul-and-sentinel), and even after a
|
|
`gitlab-ctl reconfigure`, they will get their configuration restored by
|
|
the same Sentinels.
|
|
|
|
Advanced [configuration options](https://docs.gitlab.com/omnibus/settings/redis.html)
|
|
are supported and can be added if needed.
|
|
|
|
<div align="right">
|
|
<a type="button" class="btn btn-default" href="#setup-components">
|
|
Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i>
|
|
</a>
|
|
</div>
|
|
|
|
## Configure Consul and Sentinel
|
|
|
|
Now that the Redis servers are all set up, let's configure the Sentinel
|
|
servers. The following IPs will be used as an example:
|
|
|
|
- `10.6.0.11`: Consul/Sentinel 1
|
|
- `10.6.0.12`: Consul/Sentinel 2
|
|
- `10.6.0.13`: Consul/Sentinel 3
|
|
|
|
NOTE:
|
|
If you're using an external Redis Sentinel instance, be sure to exclude the
|
|
`requirepass` parameter from the Sentinel configuration. This parameter causes
|
|
clients to report `NOAUTH Authentication required.`.
|
|
[Redis Sentinel 3.2.x doesn't support password authentication](https://github.com/antirez/redis/issues/3279).
|
|
|
|
To configure the Sentinel:
|
|
|
|
1. SSH in to the server that will host Consul/Sentinel.
|
|
1. [Download and install](https://about.gitlab.com/install/) the Omnibus GitLab
|
|
package of your choice. Be sure to both follow _only_ installation steps 1 and 2
|
|
on the page, and to select the correct Omnibus GitLab package, with the same version
|
|
and type (Community or Enterprise editions) as your current install.
|
|
1. Edit `/etc/gitlab/gitlab.rb` and add the contents:
|
|
|
|
```ruby
|
|
roles(['redis_sentinel_role', 'consul_role'])
|
|
|
|
# Must be the same in every sentinel node
|
|
redis['master_name'] = 'gitlab-redis'
|
|
|
|
# The same password for Redis authentication you set up for the primary node.
|
|
redis['master_password'] = 'redis-password-goes-here'
|
|
|
|
# The IP of the primary Redis node.
|
|
redis['master_ip'] = '10.6.0.61'
|
|
|
|
# Define a port so Redis can listen for TCP requests which will allow other
|
|
# machines to connect to it.
|
|
redis['port'] = 6379
|
|
|
|
# Port of primary Redis server, uncomment to change to non default. Defaults
|
|
# to `6379`.
|
|
#redis['master_port'] = 6379
|
|
|
|
## Configure Sentinel
|
|
sentinel['bind'] = '10.6.0.11'
|
|
|
|
# Port that Sentinel listens on, uncomment to change to non default. Defaults
|
|
# to `26379`.
|
|
# sentinel['port'] = 26379
|
|
|
|
## Quorum must reflect the amount of voting sentinels it take to start a failover.
|
|
## Value must NOT be greater then the amount of sentinels.
|
|
##
|
|
## The quorum can be used to tune Sentinel in two ways:
|
|
## 1. If a the quorum is set to a value smaller than the majority of Sentinels
|
|
## we deploy, we are basically making Sentinel more sensible to primary failures,
|
|
## triggering a failover as soon as even just a minority of Sentinels is no longer
|
|
## able to talk with the primary.
|
|
## 1. If a quorum is set to a value greater than the majority of Sentinels, we are
|
|
## making Sentinel able to failover only when there are a very large number (larger
|
|
## than majority) of well connected Sentinels which agree about the primary being down.s
|
|
sentinel['quorum'] = 2
|
|
|
|
## Consider unresponsive server down after x amount of ms.
|
|
# sentinel['down_after_milliseconds'] = 10000
|
|
|
|
## Specifies the failover timeout in milliseconds. It is used in many ways:
|
|
##
|
|
## - The time needed to re-start a failover after a previous failover was
|
|
## already tried against the same primary by a given Sentinel, is two
|
|
## times the failover timeout.
|
|
##
|
|
## - The time needed for a replica replicating to a wrong primary according
|
|
## to a Sentinel current configuration, to be forced to replicate
|
|
## with the right primary, is exactly the failover timeout (counting since
|
|
## the moment a Sentinel detected the misconfiguration).
|
|
##
|
|
## - The time needed to cancel a failover that is already in progress but
|
|
## did not produced any configuration change (REPLICAOF NO ONE yet not
|
|
## acknowledged by the promoted replica).
|
|
##
|
|
## - The maximum time a failover in progress waits for all the replica to be
|
|
## reconfigured as replicas of the new primary. However even after this time
|
|
## the replicas will be reconfigured by the Sentinels anyway, but not with
|
|
## the exact parallel-syncs progression as specified.
|
|
# sentinel['failover_timeout'] = 60000
|
|
|
|
## Enable service discovery for Prometheus
|
|
consul['monitoring_service_discovery'] = true
|
|
|
|
## The IPs of the Consul server nodes
|
|
## You can also use FQDNs and intermix them with IPs
|
|
consul['configuration'] = {
|
|
server: true,
|
|
retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13),
|
|
}
|
|
|
|
# Set the network addresses that the exporters will listen on
|
|
node_exporter['listen_address'] = '0.0.0.0:9100'
|
|
redis_exporter['listen_address'] = '0.0.0.0:9121'
|
|
|
|
# Prevent database migrations from running on upgrade automatically
|
|
gitlab_rails['auto_migrate'] = false
|
|
```
|
|
|
|
1. Copy the `/etc/gitlab/gitlab-secrets.json` file from the first Omnibus node you configured and add or replace
|
|
the file of the same name on this server. If this is the first Omnibus node you are configuring then you can skip this step.
|
|
|
|
1. [Reconfigure Omnibus GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect.
|
|
|
|
1. Go through the steps again for all the other Consul/Sentinel nodes, and
|
|
make sure you set up the correct IPs.
|
|
|
|
A Consul leader is _elected_ when the provisioning of the third Consul server is
|
|
complete. Viewing the Consul logs `sudo gitlab-ctl tail consul` displays
|
|
`...[INFO] consul: New leader elected: ...`.
|
|
|
|
You can list the current Consul members (server, client):
|
|
|
|
```shell
|
|
sudo /opt/gitlab/embedded/bin/consul members
|
|
```
|
|
|
|
You can verify the GitLab services are running:
|
|
|
|
```shell
|
|
sudo gitlab-ctl status
|
|
```
|
|
|
|
The output should be similar to the following:
|
|
|
|
```plaintext
|
|
run: consul: (pid 30074) 76834s; run: log: (pid 29740) 76844s
|
|
run: logrotate: (pid 30925) 3041s; run: log: (pid 29649) 76861s
|
|
run: node-exporter: (pid 30093) 76833s; run: log: (pid 29663) 76855s
|
|
run: sentinel: (pid 30098) 76832s; run: log: (pid 29704) 76850s
|
|
```
|
|
|
|
<div align="right">
|
|
<a type="button" class="btn btn-default" href="#setup-components">
|
|
Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i>
|
|
</a>
|
|
</div>
|
|
|
|
## Configure PostgreSQL
|
|
|
|
In this section, you'll be guided through configuring an external PostgreSQL database
|
|
to be used with GitLab.
|
|
|
|
### Provide your own PostgreSQL instance
|
|
|
|
If you're hosting GitLab on a cloud provider, you can optionally use a
|
|
managed service for PostgreSQL. For example, AWS offers a managed Relational
|
|
Database Service (RDS) that runs PostgreSQL.
|
|
|
|
If you use a cloud-managed service, or provide your own PostgreSQL:
|
|
|
|
1. Set up PostgreSQL according to the
|
|
[database requirements document](../../install/requirements.md#database).
|
|
1. Set up a `gitlab` username with a password of your choice. The `gitlab` user
|
|
needs privileges to create the `gitlabhq_production` database.
|
|
1. Configure the GitLab application servers with the appropriate details.
|
|
This step is covered in [Configuring the GitLab Rails application](#configure-gitlab-rails).
|
|
|
|
See [Configure GitLab using an external PostgreSQL service](../postgresql/external.md) for
|
|
further configuration steps.
|
|
|
|
### Standalone PostgreSQL using Omnibus GitLab
|
|
|
|
The following IPs will be used as an example:
|
|
|
|
- `10.6.0.31`: PostgreSQL primary
|
|
- `10.6.0.32`: PostgreSQL secondary 1
|
|
- `10.6.0.33`: PostgreSQL secondary 2
|
|
|
|
First, make sure to [install](https://about.gitlab.com/install/)
|
|
the Linux GitLab package **on each node**. Following the steps,
|
|
install the necessary dependencies from step 1, and add the
|
|
GitLab package repository from step 2. When installing GitLab
|
|
in the second step, do not supply the `EXTERNAL_URL` value.
|
|
|
|
#### PostgreSQL nodes
|
|
|
|
1. SSH in to one of the PostgreSQL nodes.
|
|
1. Generate a password hash for the PostgreSQL username/password pair. This assumes you will use the default
|
|
username of `gitlab` (recommended). The command will request a password
|
|
and confirmation. Use the value that is output by this command in the next
|
|
step as the value of `<postgresql_password_hash>`:
|
|
|
|
```shell
|
|
sudo gitlab-ctl pg-password-md5 gitlab
|
|
```
|
|
|
|
1. Generate a password hash for the PgBouncer username/password pair. This assumes you will use the default
|
|
username of `pgbouncer` (recommended). The command will request a password
|
|
and confirmation. Use the value that is output by this command in the next
|
|
step as the value of `<pgbouncer_password_hash>`:
|
|
|
|
```shell
|
|
sudo gitlab-ctl pg-password-md5 pgbouncer
|
|
```
|
|
|
|
1. Generate a password hash for the PostgreSQL replication username/password pair. This assumes you will use the default
|
|
username of `gitlab_replicator` (recommended). The command will request a password
|
|
and a confirmation. Use the value that is output by this command in the next step
|
|
as the value of `<postgresql_replication_password_hash>`:
|
|
|
|
```shell
|
|
sudo gitlab-ctl pg-password-md5 gitlab_replicator
|
|
```
|
|
|
|
1. Generate a password hash for the Consul database username/password pair. This assumes you will use the default
|
|
username of `gitlab-consul` (recommended). The command will request a password
|
|
and confirmation. Use the value that is output by this command in the next
|
|
step as the value of `<consul_password_hash>`:
|
|
|
|
```shell
|
|
sudo gitlab-ctl pg-password-md5 gitlab-consul
|
|
```
|
|
|
|
1. On every database node, edit `/etc/gitlab/gitlab.rb` replacing values noted in the `# START user configuration` section:
|
|
|
|
```ruby
|
|
# Disable all components except Patroni and Consul
|
|
roles(['patroni_role'])
|
|
|
|
# PostgreSQL configuration
|
|
postgresql['listen_address'] = '0.0.0.0'
|
|
|
|
# Sets `max_replication_slots` to double the number of database nodes.
|
|
# Patroni uses one extra slot per node when initiating the replication.
|
|
patroni['postgresql']['max_replication_slots'] = 6
|
|
|
|
# Set `max_wal_senders` to one more than the number of replication slots in the cluster.
|
|
# This is used to prevent replication from using up all of the
|
|
# available database connections.
|
|
patroni['postgresql']['max_wal_senders'] = 7
|
|
|
|
# Incoming recommended value for max connections is 500. See https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/5691.
|
|
patroni['postgresql']['max_connections'] = 500
|
|
|
|
# Prevent database migrations from running on upgrade automatically
|
|
gitlab_rails['auto_migrate'] = false
|
|
|
|
# Configure the Consul agent
|
|
consul['services'] = %w(postgresql)
|
|
## Enable service discovery for Prometheus
|
|
consul['monitoring_service_discovery'] = true
|
|
|
|
# START user configuration
|
|
# Please set the real values as explained in Required Information section
|
|
#
|
|
# Replace PGBOUNCER_PASSWORD_HASH with a generated md5 value
|
|
postgresql['pgbouncer_user_password'] = '<pgbouncer_password_hash>'
|
|
# Replace POSTGRESQL_REPLICATION_PASSWORD_HASH with a generated md5 value
|
|
postgresql['sql_replication_password'] = '<postgresql_replication_password_hash>'
|
|
# Replace POSTGRESQL_PASSWORD_HASH with a generated md5 value
|
|
postgresql['sql_user_password'] = '<postgresql_password_hash>'
|
|
|
|
# Replace XXX.XXX.XXX.XXX/YY with Network Address
|
|
postgresql['trust_auth_cidr_addresses'] = %w(10.6.0.0/24)
|
|
|
|
# Set the network addresses that the exporters will listen on for monitoring
|
|
node_exporter['listen_address'] = '0.0.0.0:9100'
|
|
postgres_exporter['listen_address'] = '0.0.0.0:9187'
|
|
|
|
## The IPs of the Consul server nodes
|
|
## You can also use FQDNs and intermix them with IPs
|
|
consul['configuration'] = {
|
|
retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13),
|
|
}
|
|
#
|
|
# END user configuration
|
|
```
|
|
|
|
PostgreSQL, with Patroni managing its failover, will default to use `pg_rewind` by default to handle conflicts.
|
|
Like most failover handling methods, this has a small chance of leading to data loss.
|
|
Learn more about the various [Patroni replication methods](../postgresql/replication_and_failover.md#selecting-the-appropriate-patroni-replication-method).
|
|
|
|
1. Copy the `/etc/gitlab/gitlab-secrets.json` file from the first Omnibus node you configured and add or replace
|
|
the file of the same name on this server. If this is the first Omnibus node you are configuring then you can skip this step.
|
|
|
|
1. [Reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect.
|
|
|
|
Advanced [configuration options](https://docs.gitlab.com/omnibus/settings/database.html)
|
|
are supported and can be added if needed.
|
|
|
|
<div align="right">
|
|
<a type="button" class="btn btn-default" href="#setup-components">
|
|
Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i>
|
|
</a>
|
|
</div>
|
|
|
|
#### PostgreSQL post-configuration
|
|
|
|
SSH in to any of the Patroni nodes on the **primary site**:
|
|
|
|
1. Check the status of the leader and cluster:
|
|
|
|
```shell
|
|
gitlab-ctl patroni members
|
|
```
|
|
|
|
The output should be similar to the following:
|
|
|
|
```plaintext
|
|
| Cluster | Member | Host | Role | State | TL | Lag in MB | Pending restart |
|
|
|---------------|-----------------------------------|-----------|--------|---------|-----|-----------|-----------------|
|
|
| postgresql-ha | <PostgreSQL primary hostname> | 10.6.0.31 | Leader | running | 175 | | * |
|
|
| postgresql-ha | <PostgreSQL secondary 1 hostname> | 10.6.0.32 | | running | 175 | 0 | * |
|
|
| postgresql-ha | <PostgreSQL secondary 2 hostname> | 10.6.0.33 | | running | 175 | 0 | * |
|
|
```
|
|
|
|
If the 'State' column for any node doesn't say "running", check the
|
|
[Troubleshooting section](troubleshooting.md) before proceeding.
|
|
|
|
<div align="right">
|
|
<a type="button" class="btn btn-default" href="#setup-components">
|
|
Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i>
|
|
</a>
|
|
</div>
|
|
|
|
## Configure PgBouncer
|
|
|
|
Now that the PostgreSQL servers are all set up, let's configure PgBouncer.
|
|
The following IPs will be used as an example:
|
|
|
|
- `10.6.0.21`: PgBouncer 1
|
|
- `10.6.0.22`: PgBouncer 2
|
|
- `10.6.0.23`: PgBouncer 3
|
|
|
|
1. On each PgBouncer node, edit `/etc/gitlab/gitlab.rb`, and replace
|
|
`<consul_password_hash>` and `<pgbouncer_password_hash>` with the
|
|
password hashes you [set up previously](#postgresql-nodes):
|
|
|
|
```ruby
|
|
# Disable all components except Pgbouncer and Consul agent
|
|
roles(['pgbouncer_role'])
|
|
|
|
# Configure PgBouncer
|
|
pgbouncer['admin_users'] = %w(pgbouncer gitlab-consul)
|
|
pgbouncer['users'] = {
|
|
'gitlab-consul': {
|
|
password: '<consul_password_hash>'
|
|
},
|
|
'pgbouncer': {
|
|
password: '<pgbouncer_password_hash>'
|
|
}
|
|
}
|
|
# Incoming recommended value for max db connections is 150. See https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/5691.
|
|
pgbouncer['max_db_connections'] = 150
|
|
|
|
# Configure Consul agent
|
|
consul['watchers'] = %w(postgresql)
|
|
consul['configuration'] = {
|
|
retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13)
|
|
}
|
|
|
|
# Enable service discovery for Prometheus
|
|
consul['monitoring_service_discovery'] = true
|
|
|
|
# Set the network addresses that the exporters will listen on
|
|
node_exporter['listen_address'] = '0.0.0.0:9100'
|
|
pgbouncer_exporter['listen_address'] = '0.0.0.0:9188'
|
|
```
|
|
|
|
1. Copy the `/etc/gitlab/gitlab-secrets.json` file from the first Omnibus node you configured and add or replace
|
|
the file of the same name on this server. If this is the first Omnibus node you are configuring then you can skip this step.
|
|
|
|
1. [Reconfigure Omnibus GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect.
|
|
|
|
1. Create a `.pgpass` file so Consul is able to
|
|
reload PgBouncer. Enter the PgBouncer password twice when asked:
|
|
|
|
```shell
|
|
gitlab-ctl write-pgpass --host 127.0.0.1 --database pgbouncer --user pgbouncer --hostuser gitlab-consul
|
|
```
|
|
|
|
1. Ensure each node is talking to the current master:
|
|
|
|
```shell
|
|
gitlab-ctl pgb-console # You will be prompted for PGBOUNCER_PASSWORD
|
|
```
|
|
|
|
If there is an error `psql: ERROR: Auth failed` after typing in the
|
|
password, ensure you previously generated the MD5 password hashes with the correct
|
|
format. The correct format is to concatenate the password and the username:
|
|
`PASSWORDUSERNAME`. For example, `Sup3rS3cr3tpgbouncer` would be the text
|
|
needed to generate an MD5 password hash for the `pgbouncer` user.
|
|
|
|
1. Once the console prompt is available, run the following queries:
|
|
|
|
```shell
|
|
show databases ; show clients ;
|
|
```
|
|
|
|
The output should be similar to the following:
|
|
|
|
```plaintext
|
|
name | host | port | database | force_user | pool_size | reserve_pool | pool_mode | max_connections | current_connections
|
|
---------------------+-------------+------+---------------------+------------+-----------+--------------+-----------+-----------------+---------------------
|
|
gitlabhq_production | MASTER_HOST | 5432 | gitlabhq_production | | 20 | 0 | | 0 | 0
|
|
pgbouncer | | 6432 | pgbouncer | pgbouncer | 2 | 0 | statement | 0 | 0
|
|
(2 rows)
|
|
|
|
type | user | database | state | addr | port | local_addr | local_port | connect_time | request_time | ptr | link | remote_pid | tls
|
|
------+-----------+---------------------+---------+----------------+-------+------------+------------+---------------------+---------------------+-----------+------+------------+-----
|
|
C | pgbouncer | pgbouncer | active | 127.0.0.1 | 56846 | 127.0.0.1 | 6432 | 2017-08-21 18:09:59 | 2017-08-21 18:10:48 | 0x22b3880 | | 0 |
|
|
(2 rows)
|
|
```
|
|
|
|
1. Verify the GitLab services are running:
|
|
|
|
```shell
|
|
sudo gitlab-ctl status
|
|
```
|
|
|
|
The output should be similar to the following:
|
|
|
|
```plaintext
|
|
run: consul: (pid 31530) 77150s; run: log: (pid 31106) 77182s
|
|
run: logrotate: (pid 32613) 3357s; run: log: (pid 30107) 77500s
|
|
run: node-exporter: (pid 31550) 77149s; run: log: (pid 30138) 77493s
|
|
run: pgbouncer: (pid 32033) 75593s; run: log: (pid 31117) 77175s
|
|
run: pgbouncer-exporter: (pid 31558) 77148s; run: log: (pid 31498) 77156s
|
|
```
|
|
|
|
<div align="right">
|
|
<a type="button" class="btn btn-default" href="#setup-components">
|
|
Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i>
|
|
</a>
|
|
</div>
|
|
|
|
## Configure Gitaly Cluster
|
|
|
|
[Gitaly Cluster](../gitaly/praefect.md) is a GitLab provided and recommended fault tolerant solution for storing Git repositories.
|
|
In this configuration, every Git repository is stored on every Gitaly node in the cluster, with one being designated the primary, and failover occurs automatically if the primary node goes down.
|
|
|
|
The recommended cluster setup includes the following components:
|
|
|
|
- 3 Gitaly nodes: Replicated storage of Git repositories.
|
|
- 3 Praefect nodes: Router and transaction manager for Gitaly Cluster.
|
|
- 1 Praefect PostgreSQL node: Database server for Praefect. A third-party solution
|
|
is required for Praefect database connections to be made highly available.
|
|
- 1 load balancer: A load balancer is required for Praefect. The
|
|
[internal load balancer](#configure-the-internal-load-balancer) will be used.
|
|
|
|
This section will detail how to configure the recommended standard setup in order.
|
|
For more advanced setups refer to the [standalone Gitaly Cluster documentation](../gitaly/praefect.md).
|
|
|
|
### Configure Praefect PostgreSQL
|
|
|
|
Praefect, the routing and transaction manager for Gitaly Cluster, requires its own database server to store data on Gitaly Cluster status.
|
|
|
|
If you want to have a highly available setup, Praefect requires a third-party PostgreSQL database.
|
|
A built-in solution is being [worked on](https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/5919).
|
|
|
|
#### Praefect non-HA PostgreSQL standalone using Omnibus GitLab
|
|
|
|
The following IPs will be used as an example:
|
|
|
|
- `10.6.0.141`: Praefect PostgreSQL
|
|
|
|
First, make sure to [install](https://about.gitlab.com/install/)
|
|
the Linux GitLab package in the Praefect PostgreSQL node. Following the steps,
|
|
install the necessary dependencies from step 1, and add the
|
|
GitLab package repository from step 2. When installing GitLab
|
|
in the second step, do not supply the `EXTERNAL_URL` value.
|
|
|
|
1. SSH in to the Praefect PostgreSQL node.
|
|
1. Create a strong password to be used for the Praefect PostgreSQL user. Take note of this password as `<praefect_postgresql_password>`.
|
|
1. Generate the password hash for the Praefect PostgreSQL username/password pair. This assumes you will use the default
|
|
username of `praefect` (recommended). The command will request the password `<praefect_postgresql_password>`
|
|
and confirmation. Use the value that is output by this command in the next
|
|
step as the value of `<praefect_postgresql_password_hash>`:
|
|
|
|
```shell
|
|
sudo gitlab-ctl pg-password-md5 praefect
|
|
```
|
|
|
|
1. Edit `/etc/gitlab/gitlab.rb` replacing values noted in the `# START user configuration` section:
|
|
|
|
```ruby
|
|
# Disable all components except PostgreSQL and Consul
|
|
roles(['postgres_role', 'consul_role'])
|
|
|
|
# PostgreSQL configuration
|
|
postgresql['listen_address'] = '0.0.0.0'
|
|
postgresql['max_connections'] = 200
|
|
|
|
# Prevent database migrations from running on upgrade automatically
|
|
gitlab_rails['auto_migrate'] = false
|
|
|
|
# Configure the Consul agent
|
|
## Enable service discovery for Prometheus
|
|
consul['monitoring_service_discovery'] = true
|
|
|
|
# START user configuration
|
|
# Please set the real values as explained in Required Information section
|
|
#
|
|
# Replace PRAEFECT_POSTGRESQL_PASSWORD_HASH with a generated md5 value
|
|
postgresql['sql_user_password'] = "<praefect_postgresql_password_hash>"
|
|
|
|
# Replace XXX.XXX.XXX.XXX/YY with Network Address
|
|
postgresql['trust_auth_cidr_addresses'] = %w(10.6.0.0/24)
|
|
|
|
# Set the network addresses that the exporters will listen on for monitoring
|
|
node_exporter['listen_address'] = '0.0.0.0:9100'
|
|
postgres_exporter['listen_address'] = '0.0.0.0:9187'
|
|
|
|
## The IPs of the Consul server nodes
|
|
## You can also use FQDNs and intermix them with IPs
|
|
consul['configuration'] = {
|
|
retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13),
|
|
}
|
|
#
|
|
# END user configuration
|
|
```
|
|
|
|
1. Copy the `/etc/gitlab/gitlab-secrets.json` file from the first Omnibus node you configured and add or replace
|
|
the file of the same name on this server. If this is the first Omnibus node you are configuring then you can skip this step.
|
|
|
|
1. [Reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect.
|
|
1. Follow the [post configuration](#praefect-postgresql-post-configuration).
|
|
|
|
<div align="right">
|
|
<a type="button" class="btn btn-default" href="#setup-components">
|
|
Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i>
|
|
</a>
|
|
</div>
|
|
|
|
#### Praefect HA PostgreSQL third-party solution
|
|
|
|
[As noted](#configure-praefect-postgresql), a third-party PostgreSQL solution for
|
|
Praefect's database is recommended if aiming for full High Availability.
|
|
|
|
There are many third-party solutions for PostgreSQL HA. The solution selected must have the following to work with Praefect:
|
|
|
|
- A static IP for all connections that doesn't change on failover.
|
|
- [`LISTEN`](https://www.postgresql.org/docs/12/sql-listen.html) SQL functionality must be supported.
|
|
|
|
Examples of the above could include [Google's Cloud SQL](https://cloud.google.com/sql/docs/postgres/high-availability#normal) or [Amazon RDS](https://aws.amazon.com/rds/).
|
|
|
|
Once the database is set up, follow the [post configuration](#praefect-postgresql-post-configuration).
|
|
|
|
#### Praefect PostgreSQL post-configuration
|
|
|
|
After the Praefect PostgreSQL server has been set up, you'll then need to configure the user and database for Praefect to use.
|
|
|
|
We recommend the user be named `praefect` and the database `praefect_production`, and these can be configured as standard in PostgreSQL.
|
|
The password for the user is the same as the one you configured earlier as `<praefect_postgresql_password>`.
|
|
|
|
This is how this would work with a Omnibus GitLab PostgreSQL setup:
|
|
|
|
1. SSH in to the Praefect PostgreSQL node.
|
|
1. Connect to the PostgreSQL server with administrative access.
|
|
The `gitlab-psql` user should be used here for this as it's added by default in Omnibus.
|
|
The database `template1` is used because it is created by default on all PostgreSQL servers.
|
|
|
|
```shell
|
|
/opt/gitlab/embedded/bin/psql -U gitlab-psql -d template1 -h POSTGRESQL_SERVER_ADDRESS
|
|
```
|
|
|
|
1. Create the new user `praefect`, replacing `<praefect_postgresql_password>`:
|
|
|
|
```shell
|
|
CREATE ROLE praefect WITH LOGIN CREATEDB PASSWORD <praefect_postgresql_password>;
|
|
```
|
|
|
|
1. Reconnect to the PostgreSQL server, this time as the `praefect` user:
|
|
|
|
```shell
|
|
/opt/gitlab/embedded/bin/psql -U praefect -d template1 -h POSTGRESQL_SERVER_ADDRESS
|
|
```
|
|
|
|
1. Create a new database `praefect_production`:
|
|
|
|
```shell
|
|
CREATE DATABASE praefect_production WITH ENCODING=UTF8;
|
|
```
|
|
|
|
<div align="right">
|
|
<a type="button" class="btn btn-default" href="#setup-components">
|
|
Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i>
|
|
</a>
|
|
</div>
|
|
|
|
### Configure Praefect
|
|
|
|
Praefect is the router and transaction manager for Gitaly Cluster and all connections to Gitaly go through
|
|
it. This section details how to configure it.
|
|
|
|
Praefect requires several secret tokens to secure communications across the Cluster:
|
|
|
|
- `<praefect_external_token>`: Used for repositories hosted on your Gitaly cluster and can only be accessed by Gitaly clients that carry this token.
|
|
- `<praefect_internal_token>`: Used for replication traffic inside your Gitaly cluster. This is distinct from `praefect_external_token` because Gitaly clients must not be able to access internal nodes of the Praefect cluster directly; that could lead to data loss.
|
|
- `<praefect_postgresql_password>`: The Praefect PostgreSQL password defined in the previous section is also required as part of this setup.
|
|
|
|
Gitaly Cluster nodes are configured in Praefect via a `virtual storage`. Each storage contains
|
|
the details of each Gitaly node that makes up the cluster. Each storage is also given a name
|
|
and this name is used in several areas of the configuration. In this guide, the name of the storage will be
|
|
`default`. Also, this guide is geared towards new installs, if upgrading an existing environment
|
|
to use Gitaly Cluster, you may need to use a different name.
|
|
Refer to the [Praefect documentation](../gitaly/praefect.md#praefect) for more info.
|
|
|
|
The following IPs will be used as an example:
|
|
|
|
- `10.6.0.131`: Praefect 1
|
|
- `10.6.0.132`: Praefect 2
|
|
- `10.6.0.133`: Praefect 3
|
|
|
|
To configure the Praefect nodes, on each one:
|
|
|
|
1. SSH in to the Praefect server.
|
|
1. [Download and install](https://about.gitlab.com/install/) the Omnibus GitLab
|
|
package of your choice. Be sure to follow _only_ installation steps 1 and 2
|
|
on the page.
|
|
1. Edit the `/etc/gitlab/gitlab.rb` file to configure Praefect:
|
|
|
|
```ruby
|
|
# Avoid running unnecessary services on the Praefect server
|
|
gitaly['enable'] = false
|
|
postgresql['enable'] = false
|
|
redis['enable'] = false
|
|
puma['enable'] = false
|
|
sidekiq['enable'] = false
|
|
gitlab_workhorse['enable'] = false
|
|
prometheus['enable'] = false
|
|
alertmanager['enable'] = false
|
|
grafana['enable'] = false
|
|
gitlab_exporter['enable'] = false
|
|
nginx['enable'] = false
|
|
|
|
# Praefect Configuration
|
|
praefect['enable'] = true
|
|
praefect['listen_addr'] = '0.0.0.0:2305'
|
|
|
|
# Prevent database migrations from running on upgrade automatically
|
|
praefect['auto_migrate'] = false
|
|
gitlab_rails['auto_migrate'] = false
|
|
|
|
# Configure the Consul agent
|
|
consul['enable'] = true
|
|
## Enable service discovery for Prometheus
|
|
consul['monitoring_service_discovery'] = true
|
|
|
|
# START user configuration
|
|
# Please set the real values as explained in Required Information section
|
|
#
|
|
|
|
# Praefect External Token
|
|
# This is needed by clients outside the cluster (like GitLab Shell) to communicate with the Praefect cluster
|
|
praefect['auth_token'] = '<praefect_external_token>'
|
|
|
|
# Praefect Database Settings
|
|
praefect['database_host'] = '10.6.0.141'
|
|
praefect['database_port'] = 5432
|
|
# `no_proxy` settings must always be a direct connection for caching
|
|
praefect['database_host_no_proxy'] = '10.6.0.141'
|
|
praefect['database_port_no_proxy'] = 5432
|
|
praefect['database_dbname'] = 'praefect_production'
|
|
praefect['database_user'] = 'praefect'
|
|
praefect['database_password'] = '<praefect_postgresql_password>'
|
|
|
|
# Praefect Virtual Storage config
|
|
# Name of storage hash must match storage name in git_data_dirs on GitLab
|
|
# server ('praefect') and in git_data_dirs on Gitaly nodes ('gitaly-1')
|
|
praefect['virtual_storages'] = {
|
|
'default' => {
|
|
'nodes' => {
|
|
'gitaly-1' => {
|
|
'address' => 'tcp://10.6.0.91:8075',
|
|
'token' => '<praefect_internal_token>'
|
|
},
|
|
'gitaly-2' => {
|
|
'address' => 'tcp://10.6.0.92:8075',
|
|
'token' => '<praefect_internal_token>'
|
|
},
|
|
'gitaly-3' => {
|
|
'address' => 'tcp://10.6.0.93:8075',
|
|
'token' => '<praefect_internal_token>'
|
|
},
|
|
}
|
|
}
|
|
}
|
|
|
|
# Set the network addresses that the exporters will listen on for monitoring
|
|
node_exporter['listen_address'] = '0.0.0.0:9100'
|
|
praefect['prometheus_listen_addr'] = '0.0.0.0:9652'
|
|
|
|
## The IPs of the Consul server nodes
|
|
## You can also use FQDNs and intermix them with IPs
|
|
consul['configuration'] = {
|
|
retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13),
|
|
}
|
|
#
|
|
# END user configuration
|
|
```
|
|
|
|
1. Copy the `/etc/gitlab/gitlab-secrets.json` file from the first Omnibus node you configured and add or replace
|
|
the file of the same name on this server. If this is the first Omnibus node you are configuring then you can skip this step.
|
|
|
|
1. Praefect requires to run some database migrations, much like the main GitLab application. For this
|
|
you should select **one Praefect node only to run the migrations**, AKA the _Deploy Node_. This node
|
|
must be configured first before the others as follows:
|
|
|
|
1. In the `/etc/gitlab/gitlab.rb` file, change the `praefect['auto_migrate']` setting value from `false` to `true`
|
|
|
|
1. To ensure database migrations are only run during reconfigure and not automatically on upgrade, run:
|
|
|
|
```shell
|
|
sudo touch /etc/gitlab/skip-auto-reconfigure
|
|
```
|
|
|
|
1. [Reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect and
|
|
to run the Praefect database migrations.
|
|
|
|
1. On all other Praefect nodes, [Reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect.
|
|
|
|
### Configure Gitaly
|
|
|
|
The [Gitaly](../gitaly/index.md) server nodes that make up the cluster have
|
|
requirements that are dependent on data, specifically the number of projects
|
|
and those projects' sizes. It's recommended that a Gitaly Cluster stores
|
|
no more than 5 TB of data on each node. Depending on your
|
|
repository storage requirements, you may require additional Gitaly Clusters.
|
|
|
|
Due to Gitaly having notable input and output requirements, we strongly
|
|
recommend that all Gitaly nodes use solid-state drives (SSDs). These SSDs
|
|
should have a throughput of at least 8,000
|
|
input/output operations per second (IOPS) for read operations and 2,000 IOPS for
|
|
write operations. These IOPS values are initial recommendations, and may be
|
|
adjusted to greater or lesser values depending on the scale of your
|
|
environment's workload. If you're running the environment on a Cloud provider,
|
|
refer to their documentation about how to configure IOPS correctly.
|
|
|
|
Gitaly servers must not be exposed to the public internet, as Gitaly's network
|
|
traffic is unencrypted by default. The use of a firewall is highly recommended
|
|
to restrict access to the Gitaly server. Another option is to
|
|
[use TLS](#gitaly-cluster-tls-support).
|
|
|
|
For configuring Gitaly you should note the following:
|
|
|
|
- `git_data_dirs` should be configured to reflect the storage path for the specific Gitaly node
|
|
- `auth_token` should be the same as `praefect_internal_token`
|
|
|
|
The following IPs will be used as an example:
|
|
|
|
- `10.6.0.91`: Gitaly 1
|
|
- `10.6.0.92`: Gitaly 2
|
|
- `10.6.0.93`: Gitaly 3
|
|
|
|
On each node:
|
|
|
|
1. [Download and install](https://about.gitlab.com/install/) the Omnibus GitLab
|
|
package of your choice. Be sure to follow _only_ installation steps 1 and 2
|
|
on the page, and _do not_ provide the `EXTERNAL_URL` value.
|
|
1. Edit the Gitaly server node's `/etc/gitlab/gitlab.rb` file to configure
|
|
storage paths, enable the network listener, and to configure the token:
|
|
|
|
```ruby
|
|
# Avoid running unnecessary services on the Gitaly server
|
|
postgresql['enable'] = false
|
|
redis['enable'] = false
|
|
puma['enable'] = false
|
|
sidekiq['enable'] = false
|
|
gitlab_workhorse['enable'] = false
|
|
prometheus['enable'] = false
|
|
alertmanager['enable'] = false
|
|
grafana['enable'] = false
|
|
gitlab_exporter['enable'] = false
|
|
nginx['enable'] = false
|
|
|
|
# Prevent database migrations from running on upgrade automatically
|
|
gitlab_rails['auto_migrate'] = false
|
|
|
|
# Gitaly
|
|
gitaly['enable'] = true
|
|
|
|
# Configure the gitlab-shell API callback URL. Without this, `git push` will
|
|
# fail. This can be your 'front door' GitLab URL or an internal load
|
|
# balancer.
|
|
gitlab_rails['internal_api_url'] = 'https://gitlab.example.com'
|
|
|
|
# Make Gitaly accept connections on all network interfaces. You must use
|
|
# firewalls to restrict access to this address/port.
|
|
# Comment out following line if you only want to support TLS connections
|
|
gitaly['listen_addr'] = "0.0.0.0:8075"
|
|
|
|
# Gitaly Auth Token
|
|
# Should be the same as praefect_internal_token
|
|
gitaly['auth_token'] = '<praefect_internal_token>'
|
|
```
|
|
|
|
1. Append the following to `/etc/gitlab/gitlab.rb` for each respective server:
|
|
- On Gitaly node 1:
|
|
|
|
```ruby
|
|
git_data_dirs({
|
|
"gitaly-1" => {
|
|
"path" => "/var/opt/gitlab/git-data"
|
|
}
|
|
})
|
|
```
|
|
|
|
- On Gitaly node 2:
|
|
|
|
```ruby
|
|
git_data_dirs({
|
|
"gitaly-2" => {
|
|
"path" => "/var/opt/gitlab/git-data"
|
|
}
|
|
})
|
|
```
|
|
|
|
- On Gitaly node 3:
|
|
|
|
```ruby
|
|
git_data_dirs({
|
|
"gitaly-3" => {
|
|
"path" => "/var/opt/gitlab/git-data"
|
|
}
|
|
})
|
|
```
|
|
|
|
1. Copy the `/etc/gitlab/gitlab-secrets.json` file from the first Omnibus node you configured and add or replace
|
|
the file of the same name on this server. If this is the first Omnibus node you are configuring then you can skip this step.
|
|
|
|
1. Save the file, and then [reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure).
|
|
|
|
### Gitaly Cluster TLS support
|
|
|
|
Praefect supports TLS encryption. To communicate with a Praefect instance that listens
|
|
for secure connections, you must:
|
|
|
|
- Use a `tls://` URL scheme in the `gitaly_address` of the corresponding storage entry
|
|
in the GitLab configuration.
|
|
- Bring your own certificates because this isn't provided automatically. The certificate
|
|
corresponding to each Praefect server must be installed on that Praefect server.
|
|
|
|
Additionally the certificate, or its certificate authority, must be installed on all Gitaly servers
|
|
and on all Praefect clients that communicate with it following the procedure described in
|
|
[GitLab custom certificate configuration](https://docs.gitlab.com/omnibus/settings/ssl.html#install-custom-public-certificates) (and repeated below).
|
|
|
|
Note the following:
|
|
|
|
- The certificate must specify the address you use to access the Praefect server. If
|
|
addressing the Praefect server by:
|
|
|
|
- Hostname, you can either use the Common Name field for this, or add it as a Subject
|
|
Alternative Name.
|
|
- IP address, you must add it as a Subject Alternative Name to the certificate.
|
|
|
|
- You can configure Praefect servers with both an unencrypted listening address
|
|
`listen_addr` and an encrypted listening address `tls_listen_addr` at the same time.
|
|
This allows you to do a gradual transition from unencrypted to encrypted traffic, if
|
|
necessary.
|
|
|
|
- The Internal Load Balancer will also access to the certificates and need to be configured
|
|
to allow for TLS passthrough.
|
|
Refer to the load balancers documentation on how to configure this.
|
|
|
|
To configure Praefect with TLS:
|
|
|
|
1. Create certificates for Praefect servers.
|
|
|
|
1. On the Praefect servers, create the `/etc/gitlab/ssl` directory and copy your key
|
|
and certificate there:
|
|
|
|
```shell
|
|
sudo mkdir -p /etc/gitlab/ssl
|
|
sudo chmod 755 /etc/gitlab/ssl
|
|
sudo cp key.pem cert.pem /etc/gitlab/ssl/
|
|
sudo chmod 644 key.pem cert.pem
|
|
```
|
|
|
|
1. Edit `/etc/gitlab/gitlab.rb` and add:
|
|
|
|
```ruby
|
|
praefect['tls_listen_addr'] = "0.0.0.0:3305"
|
|
praefect['certificate_path'] = "/etc/gitlab/ssl/cert.pem"
|
|
praefect['key_path'] = "/etc/gitlab/ssl/key.pem"
|
|
```
|
|
|
|
1. Save the file and [reconfigure](../restart_gitlab.md#omnibus-gitlab-reconfigure).
|
|
|
|
1. On the Praefect clients (including each Gitaly server), copy the certificates,
|
|
or their certificate authority, into `/etc/gitlab/trusted-certs`:
|
|
|
|
```shell
|
|
sudo cp cert.pem /etc/gitlab/trusted-certs/
|
|
```
|
|
|
|
1. On the Praefect clients (except Gitaly servers), edit `git_data_dirs` in
|
|
`/etc/gitlab/gitlab.rb` as follows:
|
|
|
|
```ruby
|
|
git_data_dirs({
|
|
"default" => {
|
|
"gitaly_address" => 'tls://LOAD_BALANCER_SERVER_ADDRESS:2305',
|
|
"gitaly_token" => 'PRAEFECT_EXTERNAL_TOKEN'
|
|
}
|
|
})
|
|
```
|
|
|
|
1. Save the file and [reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure).
|
|
|
|
<div align="right">
|
|
<a type="button" class="btn btn-default" href="#setup-components">
|
|
Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i>
|
|
</a>
|
|
</div>
|
|
|
|
## Configure Sidekiq
|
|
|
|
Sidekiq requires connection to the [Redis](#configure-redis),
|
|
[PostgreSQL](#configure-postgresql) and [Gitaly](#configure-gitaly) instances.
|
|
[Object storage](#configure-the-object-storage) is also required to be configured.
|
|
|
|
The following IPs will be used as an example:
|
|
|
|
- `10.6.0.71`: Sidekiq 1
|
|
- `10.6.0.72`: Sidekiq 2
|
|
- `10.6.0.73`: Sidekiq 3
|
|
- `10.6.0.74`: Sidekiq 4
|
|
|
|
To configure the Sidekiq nodes, one each one:
|
|
|
|
1. SSH in to the Sidekiq server.
|
|
1. [Download and install](https://about.gitlab.com/install/) the Omnibus GitLab
|
|
package of your choice. Be sure to follow _only_ installation steps 1 and 2
|
|
on the page.
|
|
1. Open `/etc/gitlab/gitlab.rb` with your editor:
|
|
|
|
```ruby
|
|
# Avoid running unnecessary services on the Sidekiq server
|
|
gitaly['enable'] = false
|
|
postgresql['enable'] = false
|
|
redis['enable'] = false
|
|
puma['enable'] = false
|
|
gitlab_workhorse['enable'] = false
|
|
prometheus['enable'] = false
|
|
alertmanager['enable'] = false
|
|
grafana['enable'] = false
|
|
gitlab_exporter['enable'] = false
|
|
nginx['enable'] = false
|
|
|
|
# Redis
|
|
redis['master_name'] = 'gitlab-redis'
|
|
|
|
## The same password for Redis authentication you set up for the master node.
|
|
redis['master_password'] = '<redis_primary_password>'
|
|
|
|
## A list of sentinels with `host` and `port`
|
|
gitlab_rails['redis_sentinels'] = [
|
|
{'host' => '10.6.0.11', 'port' => 26379},
|
|
{'host' => '10.6.0.12', 'port' => 26379},
|
|
{'host' => '10.6.0.13', 'port' => 26379},
|
|
]
|
|
|
|
# Gitaly Cluster
|
|
## git_data_dirs get configured for the Praefect virtual storage
|
|
## Address is Internal Load Balancer for Praefect
|
|
## Token is praefect_external_token
|
|
git_data_dirs({
|
|
"default" => {
|
|
"gitaly_address" => "tcp://10.6.0.40:2305", # internal load balancer IP
|
|
"gitaly_token" => '<praefect_external_token>'
|
|
}
|
|
})
|
|
|
|
# PostgreSQL
|
|
gitlab_rails['db_host'] = '10.6.0.40' # internal load balancer IP
|
|
gitlab_rails['db_port'] = 6432
|
|
gitlab_rails['db_password'] = '<postgresql_user_password>'
|
|
gitlab_rails['db_adapter'] = 'postgresql'
|
|
gitlab_rails['db_encoding'] = 'unicode'
|
|
## Prevent database migrations from running on upgrade automatically
|
|
gitlab_rails['auto_migrate'] = false
|
|
|
|
# Sidekiq
|
|
sidekiq['enable'] = true
|
|
sidekiq['listen_address'] = "0.0.0.0"
|
|
|
|
## Set number of Sidekiq queue processes to the same number as available CPUs
|
|
sidekiq['queue_groups'] = ['*'] * 2
|
|
|
|
## Set number of Sidekiq threads per queue process to the recommend number of 10
|
|
sidekiq['max_concurrency'] = 10
|
|
|
|
# Monitoring
|
|
consul['enable'] = true
|
|
consul['monitoring_service_discovery'] = true
|
|
|
|
consul['configuration'] = {
|
|
retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13)
|
|
}
|
|
|
|
## Set the network addresses that the exporters will listen on
|
|
node_exporter['listen_address'] = '0.0.0.0:9100'
|
|
|
|
## Add the monitoring node's IP address to the monitoring whitelist
|
|
gitlab_rails['monitoring_whitelist'] = ['10.6.0.81/32', '127.0.0.0/8']
|
|
gitlab_rails['prometheus_address'] = '10.6.0.81:9090'
|
|
|
|
# Object Storage
|
|
## This is an example for configuring Object Storage on GCP
|
|
## Replace this config with your chosen Object Storage provider as desired
|
|
gitlab_rails['object_store']['connection'] = {
|
|
'provider' => 'Google',
|
|
'google_project' => '<gcp-project-name>',
|
|
'google_json_key_location' => '<path-to-gcp-service-account-key>'
|
|
}
|
|
gitlab_rails['object_store']['objects']['artifacts']['bucket'] = "<gcp-artifacts-bucket-name>"
|
|
gitlab_rails['object_store']['objects']['external_diffs']['bucket'] = "<gcp-external-diffs-bucket-name>"
|
|
gitlab_rails['object_store']['objects']['lfs']['bucket'] = "<gcp-lfs-bucket-name>"
|
|
gitlab_rails['object_store']['objects']['uploads']['bucket'] = "<gcp-uploads-bucket-name>"
|
|
gitlab_rails['object_store']['objects']['packages']['bucket'] = "<gcp-packages-bucket-name>"
|
|
gitlab_rails['object_store']['objects']['dependency_proxy']['bucket'] = "<gcp-dependency-proxy-bucket-name>"
|
|
gitlab_rails['object_store']['objects']['terraform_state']['bucket'] = "<gcp-terraform-state-bucket-name>"
|
|
|
|
gitlab_rails['backup_upload_connection'] = {
|
|
'provider' => 'Google',
|
|
'google_project' => '<gcp-project-name>',
|
|
'google_json_key_location' => '<path-to-gcp-service-account-key>'
|
|
}
|
|
gitlab_rails['backup_upload_remote_directory'] = "<gcp-backups-state-bucket-name>"
|
|
```
|
|
|
|
1. Copy the `/etc/gitlab/gitlab-secrets.json` file from the first Omnibus node you configured and add or replace
|
|
the file of the same name on this server. If this is the first Omnibus node you are configuring then you can skip this step.
|
|
|
|
1. To ensure database migrations are only run during reconfigure and not automatically on upgrade, run:
|
|
|
|
```shell
|
|
sudo touch /etc/gitlab/skip-auto-reconfigure
|
|
```
|
|
|
|
Only a single designated node should handle migrations as detailed in the
|
|
[GitLab Rails post-configuration](#gitlab-rails-post-configuration) section.
|
|
|
|
1. Save the file and [reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure).
|
|
|
|
1. Verify the GitLab services are running:
|
|
|
|
```shell
|
|
sudo gitlab-ctl status
|
|
```
|
|
|
|
The output should be similar to the following:
|
|
|
|
```plaintext
|
|
run: consul: (pid 30114) 77353s; run: log: (pid 29756) 77367s
|
|
run: logrotate: (pid 9898) 3561s; run: log: (pid 29653) 77380s
|
|
run: node-exporter: (pid 30134) 77353s; run: log: (pid 29706) 77372s
|
|
run: sidekiq: (pid 30142) 77351s; run: log: (pid 29638) 77386s
|
|
```
|
|
|
|
NOTE:
|
|
If you find that the environment's Sidekiq job processing is slow with long queues,
|
|
more nodes can be added as required. You can also tune your Sidekiq nodes to
|
|
run [multiple Sidekiq processes](../operations/extra_sidekiq_processes.md).
|
|
|
|
<div align="right">
|
|
<a type="button" class="btn btn-default" href="#setup-components">
|
|
Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i>
|
|
</a>
|
|
</div>
|
|
|
|
## Configure GitLab Rails
|
|
|
|
This section describes how to configure the GitLab application (Rails) component.
|
|
[Object storage](#configure-the-object-storage) is also required to be configured.
|
|
|
|
On each node perform the following:
|
|
|
|
1. If you're [using NFS](#configure-nfs-optional):
|
|
|
|
1. If necessary, install the NFS client utility packages using the following
|
|
commands:
|
|
|
|
```shell
|
|
# Ubuntu/Debian
|
|
apt-get install nfs-common
|
|
|
|
# CentOS/Red Hat
|
|
yum install nfs-utils nfs-utils-lib
|
|
```
|
|
|
|
1. Specify the necessary NFS mounts in `/etc/fstab`.
|
|
The exact contents of `/etc/fstab` will depend on how you chose
|
|
to configure your NFS server. See the [NFS documentation](../nfs.md)
|
|
for examples and the various options.
|
|
|
|
1. Create the shared directories. These may be different depending on your NFS
|
|
mount locations.
|
|
|
|
```shell
|
|
mkdir -p /var/opt/gitlab/.ssh /var/opt/gitlab/gitlab-rails/uploads /var/opt/gitlab/gitlab-rails/shared /var/opt/gitlab/gitlab-ci/builds /var/opt/gitlab/git-data
|
|
```
|
|
|
|
1. [Download and install](https://about.gitlab.com/install/) the Omnibus GitLab
|
|
package of your choice. Be sure to follow _only_ installation steps 1 and 2
|
|
on the page.
|
|
1. Create or edit `/etc/gitlab/gitlab.rb` and use the following configuration.
|
|
To maintain uniformity of links across nodes, the `external_url`
|
|
on the application server should point to the external URL that users will use
|
|
to access GitLab. This would be the URL of the [external load balancer](#configure-the-external-load-balancer)
|
|
which will route traffic to the GitLab application server:
|
|
|
|
```ruby
|
|
external_url 'https://gitlab.example.com'
|
|
|
|
# git_data_dirs get configured for the Praefect virtual storage
|
|
# Address is Interal Load Balancer for Praefect
|
|
# Token is praefect_external_token
|
|
git_data_dirs({
|
|
"default" => {
|
|
"gitaly_address" => "tcp://10.6.0.40:2305", # internal load balancer IP
|
|
"gitaly_token" => '<praefect_external_token>'
|
|
}
|
|
})
|
|
|
|
## Disable components that will not be on the GitLab application server
|
|
roles(['application_role'])
|
|
gitaly['enable'] = false
|
|
nginx['enable'] = true
|
|
sidekiq['enable'] = false
|
|
|
|
## PostgreSQL connection details
|
|
# Disable PostgreSQL on the application node
|
|
postgresql['enable'] = false
|
|
gitlab_rails['db_host'] = '10.6.0.20' # internal load balancer IP
|
|
gitlab_rails['db_port'] = 6432
|
|
gitlab_rails['db_password'] = '<postgresql_user_password>'
|
|
# Prevent database migrations from running on upgrade automatically
|
|
gitlab_rails['auto_migrate'] = false
|
|
|
|
## Redis connection details
|
|
## Must be the same in every sentinel node
|
|
redis['master_name'] = 'gitlab-redis'
|
|
|
|
## The same password for Redis authentication you set up for the Redis primary node.
|
|
redis['master_password'] = '<redis_primary_password>'
|
|
|
|
## A list of sentinels with `host` and `port`
|
|
gitlab_rails['redis_sentinels'] = [
|
|
{'host' => '10.6.0.11', 'port' => 26379},
|
|
{'host' => '10.6.0.12', 'port' => 26379},
|
|
{'host' => '10.6.0.13', 'port' => 26379}
|
|
]
|
|
|
|
## Enable service discovery for Prometheus
|
|
consul['enable'] = true
|
|
consul['monitoring_service_discovery'] = true
|
|
|
|
# Set the network addresses that the exporters used for monitoring will listen on
|
|
node_exporter['listen_address'] = '0.0.0.0:9100'
|
|
gitlab_workhorse['prometheus_listen_addr'] = '0.0.0.0:9229'
|
|
sidekiq['listen_address'] = "0.0.0.0"
|
|
puma['listen'] = '0.0.0.0'
|
|
|
|
## The IPs of the Consul server nodes
|
|
## You can also use FQDNs and intermix them with IPs
|
|
consul['configuration'] = {
|
|
retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13),
|
|
}
|
|
|
|
# Add the monitoring node's IP address to the monitoring whitelist and allow it to
|
|
# scrape the NGINX metrics
|
|
gitlab_rails['monitoring_whitelist'] = ['10.6.0.81/32', '127.0.0.0/8']
|
|
nginx['status']['options']['allow'] = ['10.6.0.81/32', '127.0.0.0/8']
|
|
gitlab_rails['prometheus_address'] = '10.6.0.81:9090'
|
|
|
|
## Uncomment and edit the following options if you have set up NFS
|
|
##
|
|
## Prevent GitLab from starting if NFS data mounts are not available
|
|
##
|
|
#high_availability['mountpoint'] = '/var/opt/gitlab/git-data'
|
|
##
|
|
## Ensure UIDs and GIDs match between servers for permissions via NFS
|
|
##
|
|
#user['uid'] = 9000
|
|
#user['gid'] = 9000
|
|
#web_server['uid'] = 9001
|
|
#web_server['gid'] = 9001
|
|
#registry['uid'] = 9002
|
|
#registry['gid'] = 9002
|
|
|
|
# Object storage
|
|
# This is an example for configuring Object Storage on GCP
|
|
# Replace this config with your chosen Object Storage provider as desired
|
|
gitlab_rails['object_store']['connection'] = {
|
|
'provider' => 'Google',
|
|
'google_project' => '<gcp-project-name>',
|
|
'google_json_key_location' => '<path-to-gcp-service-account-key>'
|
|
}
|
|
gitlab_rails['object_store']['objects']['artifacts']['bucket'] = "<gcp-artifacts-bucket-name>"
|
|
gitlab_rails['object_store']['objects']['external_diffs']['bucket'] = "<gcp-external-diffs-bucket-name>"
|
|
gitlab_rails['object_store']['objects']['lfs']['bucket'] = "<gcp-lfs-bucket-name>"
|
|
gitlab_rails['object_store']['objects']['uploads']['bucket'] = "<gcp-uploads-bucket-name>"
|
|
gitlab_rails['object_store']['objects']['packages']['bucket'] = "<gcp-packages-bucket-name>"
|
|
gitlab_rails['object_store']['objects']['dependency_proxy']['bucket'] = "<gcp-dependency-proxy-bucket-name>"
|
|
gitlab_rails['object_store']['objects']['terraform_state']['bucket'] = "<gcp-terraform-state-bucket-name>"
|
|
|
|
gitlab_rails['backup_upload_connection'] = {
|
|
'provider' => 'Google',
|
|
'google_project' => '<gcp-project-name>',
|
|
'google_json_key_location' => '<path-to-gcp-service-account-key>'
|
|
}
|
|
gitlab_rails['backup_upload_remote_directory'] = "<gcp-backups-state-bucket-name>"
|
|
```
|
|
|
|
1. If you're using [Gitaly with TLS support](#gitaly-cluster-tls-support), make sure the
|
|
`git_data_dirs` entry is configured with `tls` instead of `tcp`:
|
|
|
|
```ruby
|
|
git_data_dirs({
|
|
"default" => {
|
|
"gitaly_address" => "tls://10.6.0.40:2305", # internal load balancer IP
|
|
"gitaly_token" => '<praefect_external_token>'
|
|
}
|
|
})
|
|
```
|
|
|
|
1. Copy the cert into `/etc/gitlab/trusted-certs`:
|
|
|
|
```shell
|
|
sudo cp cert.pem /etc/gitlab/trusted-certs/
|
|
```
|
|
|
|
1. Copy the `/etc/gitlab/gitlab-secrets.json` file from the first Omnibus node you configured and add or replace
|
|
the file of the same name on this server. If this is the first Omnibus node you are configuring then you can skip this step.
|
|
|
|
1. To ensure database migrations are only run during reconfigure and not automatically on upgrade, run:
|
|
|
|
```shell
|
|
sudo touch /etc/gitlab/skip-auto-reconfigure
|
|
```
|
|
|
|
Only a single designated node should handle migrations as detailed in the
|
|
[GitLab Rails post-configuration](#gitlab-rails-post-configuration) section.
|
|
|
|
1. [Reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect.
|
|
|
|
1. Run `sudo gitlab-rake gitlab:gitaly:check` to confirm the node can connect to Gitaly.
|
|
1. Tail the logs to see the requests:
|
|
|
|
```shell
|
|
sudo gitlab-ctl tail gitaly
|
|
```
|
|
|
|
1. Verify the GitLab services are running:
|
|
|
|
```shell
|
|
sudo gitlab-ctl status
|
|
```
|
|
|
|
The output should be similar to the following:
|
|
|
|
```plaintext
|
|
run: consul: (pid 4890) 8647s; run: log: (pid 29962) 79128s
|
|
run: gitlab-exporter: (pid 4902) 8647s; run: log: (pid 29913) 79134s
|
|
run: gitlab-workhorse: (pid 4904) 8646s; run: log: (pid 29713) 79155s
|
|
run: logrotate: (pid 12425) 1446s; run: log: (pid 29798) 79146s
|
|
run: nginx: (pid 4925) 8646s; run: log: (pid 29726) 79152s
|
|
run: node-exporter: (pid 4931) 8645s; run: log: (pid 29855) 79140s
|
|
run: puma: (pid 4936) 8645s; run: log: (pid 29656) 79161s
|
|
```
|
|
|
|
When you specify `https` in the `external_url`, as in the previous example,
|
|
GitLab expects that the SSL certificates are in `/etc/gitlab/ssl/`. If the
|
|
certificates aren't present, NGINX will fail to start. For more information, see
|
|
the [NGINX documentation](https://docs.gitlab.com/omnibus/settings/nginx.html#enable-https).
|
|
|
|
### GitLab Rails post-configuration
|
|
|
|
1. Ensure that all migrations ran:
|
|
|
|
```shell
|
|
gitlab-rake gitlab:db:configure
|
|
```
|
|
|
|
If you encounter a `rake aborted!` error message stating that PgBouncer is
|
|
failing to connect to PostgreSQL, it may be that your PgBouncer node's IP
|
|
address is missing from PostgreSQL's `trust_auth_cidr_addresses` in `gitlab.rb`
|
|
on your database nodes. Before proceeding, see
|
|
[PgBouncer error `ERROR: pgbouncer cannot connect to server`](troubleshooting.md#pgbouncer-error-error-pgbouncer-cannot-connect-to-server).
|
|
|
|
1. [Configure fast lookup of authorized SSH keys in the database](../operations/fast_ssh_key_lookup.md).
|
|
|
|
<div align="right">
|
|
<a type="button" class="btn btn-default" href="#setup-components">
|
|
Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i>
|
|
</a>
|
|
</div>
|
|
|
|
## Configure Prometheus
|
|
|
|
The Omnibus GitLab package can be used to configure a standalone Monitoring node
|
|
running [Prometheus](../monitoring/prometheus/index.md) and
|
|
[Grafana](../monitoring/performance/grafana_configuration.md):
|
|
|
|
1. SSH in to the Monitoring node.
|
|
1. [Download and install](https://about.gitlab.com/install/) the Omnibus GitLab
|
|
package of your choice. Be sure to follow _only_ installation steps 1 and 2
|
|
on the page.
|
|
1. Edit `/etc/gitlab/gitlab.rb` and add the contents:
|
|
|
|
```ruby
|
|
roles(['monitoring_role', 'consul_role'])
|
|
|
|
external_url 'http://gitlab.example.com'
|
|
|
|
# Prometheus
|
|
prometheus['listen_address'] = '0.0.0.0:9090'
|
|
prometheus['monitor_kubernetes'] = false
|
|
|
|
# Grafana
|
|
grafana['admin_password'] = '<grafana_password>'
|
|
grafana['disable_login_form'] = false
|
|
|
|
# Enable service discovery for Prometheus
|
|
consul['monitoring_service_discovery'] = true
|
|
consul['configuration'] = {
|
|
retry_join: %w(10.6.0.11 10.6.0.12 10.6.0.13)
|
|
}
|
|
|
|
# Nginx - For Grafana access
|
|
nginx['enable'] = true
|
|
```
|
|
|
|
1. Save the file and [reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure).
|
|
1. In the GitLab UI, set `admin/application_settings/metrics_and_profiling` > Metrics - Grafana to `/-/grafana` to
|
|
`http[s]://<MONITOR NODE>/-/grafana`.
|
|
1. Verify the GitLab services are running:
|
|
|
|
```shell
|
|
sudo gitlab-ctl status
|
|
```
|
|
|
|
The output should be similar to the following:
|
|
|
|
```plaintext
|
|
run: consul: (pid 31637) 17337s; run: log: (pid 29748) 78432s
|
|
run: grafana: (pid 31644) 17337s; run: log: (pid 29719) 78438s
|
|
run: logrotate: (pid 31809) 2936s; run: log: (pid 29581) 78462s
|
|
run: nginx: (pid 31665) 17335s; run: log: (pid 29556) 78468s
|
|
run: prometheus: (pid 31672) 17335s; run: log: (pid 29633) 78456s
|
|
```
|
|
|
|
<div align="right">
|
|
<a type="button" class="btn btn-default" href="#setup-components">
|
|
Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i>
|
|
</a>
|
|
</div>
|
|
|
|
## Configure the object storage
|
|
|
|
GitLab supports using an object storage service for holding numerous types of data.
|
|
It's recommended over [NFS](#configure-nfs-optional) and in general it's better
|
|
in larger setups as object storage is typically much more performant, reliable,
|
|
and scalable.
|
|
|
|
GitLab has been tested on a number of object storage providers:
|
|
|
|
- [Amazon S3](https://aws.amazon.com/s3/)
|
|
- [Google Cloud Storage](https://cloud.google.com/storage)
|
|
- [Digital Ocean Spaces](https://www.digitalocean.com/products/spaces/)
|
|
- [Oracle Cloud Infrastructure](https://docs.cloud.oracle.com/en-us/iaas/Content/Object/Tasks/s3compatibleapi.htm)
|
|
- [OpenStack Swift](https://docs.openstack.org/swift/latest/s3_compat.html)
|
|
- [Azure Blob storage](https://docs.microsoft.com/en-us/azure/storage/blobs/storage-blobs-introduction)
|
|
- On-premises hardware and appliances from various storage vendors.
|
|
- MinIO. We have [a guide to deploying this](https://docs.gitlab.com/charts/advanced/external-object-storage/minio.html) within our Helm Chart documentation.
|
|
|
|
There are two ways of specifying object storage configuration in GitLab:
|
|
|
|
- [Consolidated form](../object_storage.md#consolidated-object-storage-configuration): A single credential is
|
|
shared by all supported object types.
|
|
- [Storage-specific form](../object_storage.md#storage-specific-configuration): Every object defines its
|
|
own object storage [connection and configuration](../object_storage.md#connection-settings).
|
|
|
|
Starting with GitLab 13.2, consolidated object storage configuration is available. It simplifies your GitLab configuration since the connection details are shared across object types. Refer to [Consolidated object storage configuration](../object_storage.md#consolidated-object-storage-configuration) guide for instructions on how to set it up.
|
|
|
|
For configuring object storage in GitLab 13.1 and earlier, or for storage types not
|
|
supported by consolidated configuration form, refer to the following guides based
|
|
on what features you intend to use:
|
|
|
|
|Object storage type|Supported by consolidated configuration?|
|
|
|-------------------|----------------------------------------|
|
|
| [Backups](../../raketasks/backup_restore.md#uploading-backups-to-a-remote-cloud-storage) | No |
|
|
| [Job artifacts](../job_artifacts.md#using-object-storage) including archived job logs | Yes |
|
|
| [LFS objects](../lfs/index.md#storing-lfs-objects-in-remote-object-storage) | Yes |
|
|
| [Uploads](../uploads.md#using-object-storage) | Yes |
|
|
| [Container Registry](../packages/container_registry.md#use-object-storage) (optional feature) | No |
|
|
| [Merge request diffs](../merge_request_diffs.md#using-object-storage) | Yes |
|
|
| [Mattermost](https://docs.mattermost.com/administration/config-settings.html#file-storage)| No |
|
|
| [Packages](../packages/index.md#using-object-storage) (optional feature) | Yes |
|
|
| [Dependency Proxy](../packages/dependency_proxy.md#using-object-storage) (optional feature) | Yes |
|
|
| [Pseudonymizer](../pseudonymizer.md#configuration) (optional feature) **(ULTIMATE SELF)** | No |
|
|
| [Autoscale runner caching](https://docs.gitlab.com/runner/configuration/autoscale.html#distributed-runners-caching) (optional for improved performance) | No |
|
|
| [Terraform state files](../terraform_state.md#using-object-storage) | Yes |
|
|
|
|
Using separate buckets for each data type is the recommended approach for GitLab.
|
|
This ensures there are no collisions across the various types of data GitLab stores.
|
|
There are plans to [enable the use of a single bucket](https://gitlab.com/gitlab-org/gitlab/-/issues/292958)
|
|
in the future.
|
|
|
|
<div align="right">
|
|
<a type="button" class="btn btn-default" href="#setup-components">
|
|
Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i>
|
|
</a>
|
|
</div>
|
|
|
|
## Configure Advanced Search
|
|
|
|
You can leverage Elasticsearch and [enable Advanced Search](../../integration/elasticsearch.md)
|
|
for faster, more advanced code search across your entire GitLab instance.
|
|
|
|
Elasticsearch cluster design and requirements are dependent on your specific
|
|
data. For recommended best practices about how to set up your Elasticsearch
|
|
cluster alongside your instance, read how to
|
|
[choose the optimal cluster configuration](../../integration/elasticsearch.md#guidance-on-choosing-optimal-cluster-configuration).
|
|
|
|
<div align="right">
|
|
<a type="button" class="btn btn-default" href="#setup-components">
|
|
Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i>
|
|
</a>
|
|
</div>
|
|
|
|
## Configure NFS (optional)
|
|
|
|
[Object storage](#configure-the-object-storage), along with [Gitaly](#configure-gitaly)
|
|
are recommended over NFS wherever possible for improved performance. If you intend
|
|
to use GitLab Pages, this currently [requires NFS](troubleshooting.md#gitlab-pages-requires-nfs).
|
|
|
|
See how to [configure NFS](../nfs.md).
|
|
|
|
WARNING:
|
|
From GitLab 14.0, enhancements and bug fixes for NFS for Git repositories will no longer be
|
|
considered and customer technical support will be considered out of scope.
|
|
[Read more about Gitaly and NFS](../gitaly/index.md#nfs-deprecation-notice) and
|
|
[the correct mount options to use](../nfs.md#upgrade-to-gitaly-cluster-or-disable-caching-if-experiencing-data-loss).
|
|
|
|
## Supported modifications for lower user counts (HA)
|
|
|
|
The 3k GitLab reference architecture is the smallest we recommend that achieves High Availability (HA).
|
|
However, for environments that need to serve less users but maintain HA, there's several
|
|
supported modifications you can make to this architecture to reduce complexity and cost.
|
|
|
|
It should be noted that to achieve HA with GitLab, this architecture's makeup is ultimately what is
|
|
required. Each component has various considerations and rules to follow and this architecture
|
|
meets all of these. Smaller versions of this architecture will be fundamentally the same,
|
|
but with smaller performance requirements, several modifications can be considered as follows:
|
|
|
|
- Lowering node specs: Depending on your user count, you can lower all suggested node specs as desired. However, it's recommended that you don't go lower than the [general requirements](../../install/requirements.md).
|
|
- Combining select nodes: Some nodes can be combined to reduce complexity at the cost of some performance:
|
|
- GitLab Rails and Sidekiq: Sidekiq nodes can be removed and the component instead enabled on the GitLab Rails nodes.
|
|
- PostgreSQL and PgBouncer: PgBouncer nodes can be removed and the component instead enabled on PostgreSQL with the Internal Load Balancer pointing to them instead.
|
|
- Running select components in reputable Cloud PaaS solutions: Select components of the GitLab setup can instead be run on Cloud Provider PaaS solutions. By doing this, additional dependent components can also be removed:
|
|
- PostgreSQL: Can be run on reputable Cloud PaaS solutions such as Google Cloud SQL or AWS RDS. In this setup, the PgBouncer and Consul nodes are no longer required:
|
|
- Consul may still be desired if [Prometheus](../monitoring/prometheus/index.md) auto discovery is a requirement, otherwise you would need to [manually add scrape configurations](../monitoring/prometheus/index.md#adding-custom-scrape-configurations) for all nodes.
|
|
- As Redis Sentinel runs on the same box as Consul in this architecture, it may need to be run on a separate box if Redis is still being run via Omnibus.
|
|
- Redis: Can be run on reputable Cloud PaaS solutions such as Google Memorystore and AWS ElastiCache. In this setup, the Redis Sentinel is no longer required.
|
|
|
|
<div align="right">
|
|
<a type="button" class="btn btn-default" href="#setup-components">
|
|
Back to setup components <i class="fa fa-angle-double-up" aria-hidden="true"></i>
|
|
</a>
|
|
</div>
|