70 lines
3.8 KiB
Markdown
70 lines
3.8 KiB
Markdown
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# GitLab Prometheus metrics
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>**Note:**
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Available since [Omnibus GitLab 9.3][29118]. Currently experimental. For
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installations from source you'll have to configure it yourself.
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To enable the GitLab Prometheus metrics:
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1. Log into GitLab as an administrator, and go to the Admin area.
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1. Click on the gear, then click on Settings.
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1. Find the `Metrics - Prometheus` section, and click `Enable Prometheus Metrics`
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1. [Restart GitLab][restart] for the changes to take effect
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## Collecting the metrics
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GitLab monitors its own internal service metrics, and makes them available at the
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`/-/metrics` endpoint. Unlike other [Prometheus] exporters, in order to access
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it, the client IP needs to be [included in a whitelist][whitelist].
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Currently the embedded Prometheus server is not automatically configured to
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collect metrics from this endpoint. We recommend setting up another Prometheus
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server, because the embedded server configuration is overwritten once every
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[reconfigure of GitLab][reconfigure]. In the future this will not be required.
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## Metrics available
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In this experimental phase, only a few metrics are available:
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| Metric | Type | Since | Description |
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|:--------------------------------- |:--------- |:----- |:----------- |
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| db_ping_timeout | Gauge | 9.4 | Whether or not the last database ping timed out |
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| db_ping_success | Gauge | 9.4 | Whether or not the last database ping succeeded |
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| db_ping_latency_seconds | Gauge | 9.4 | Round trip time of the database ping |
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| filesystem_access_latency_seconds | Gauge | 9.4 | Latency in accessing a specific filesystem |
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| filesystem_accessible | Gauge | 9.4 | Whether or not a specific filesystem is accessible |
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| filesystem_write_latency_seconds | Gauge | 9.4 | Write latency of a specific filesystem |
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| filesystem_writable | Gauge | 9.4 | Whether or not the filesystem is writable |
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| filesystem_read_latency_seconds | Gauge | 9.4 | Read latency of a specific filesystem |
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| filesystem_readable | Gauge | 9.4 | Whether or not the filesystem is readable |
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| http_requests_total | Counter | 9.4 | Rack request count |
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| http_request_duration_seconds | Histogram | 9.4 | HTTP response time from rack middleware |
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| pipelines_created_total | Counter | 9.4 | Counter of pipelines created |
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| rack_uncaught_errors_total | Counter | 9.4 | Rack connections handling uncaught errors count |
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| redis_ping_timeout | Gauge | 9.4 | Whether or not the last redis ping timed out |
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| redis_ping_success | Gauge | 9.4 | Whether or not the last redis ping succeeded |
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| redis_ping_latency_seconds | Gauge | 9.4 | Round trip time of the redis ping |
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| user_session_logins_total | Counter | 9.4 | Counter of how many users have logged in |
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## Metrics shared directory
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GitLab's Prometheus client requires a directory to store metrics data shared between multi-process services.
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Those files are shared among all instances running under Unicorn server.
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The directory needs to be accessible to all running Unicorn's processes otherwise
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metrics will not function correctly.
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For best performance its advisable that this directory will be located in `tmpfs`.
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Its location is configured using environment variable `prometheus_multiproc_dir`.
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If GitLab is installed using Omnibus and `tmpfs` is available then metrics
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directory will be automatically configured.
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[← Back to the main Prometheus page](index.md)
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[29118]: https://gitlab.com/gitlab-org/gitlab-ce/issues/29118
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[Prometheus]: https://prometheus.io
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[restart]: ../../restart_gitlab.md#omnibus-gitlab-restart
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[whitelist]: ../ip_whitelist.md
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[reconfigure]: ../../restart_gitlab.md#omnibus-gitlab-reconfigure
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