--- stage: Create group: Gitaly 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 type: reference --- # Troubleshooting Gitaly and Gitaly Cluster **(FREE SELF)** Refer to the information below when troubleshooting Gitaly and Gitaly Cluster. Before troubleshooting, see the Gitaly and Gitaly Cluster [frequently asked questions](faq.md). ## Troubleshoot Gitaly The following sections provide possible solutions to Gitaly errors. See also [Gitaly timeout](../../user/admin_area/settings/gitaly_timeouts.md) settings. ### Check versions when using standalone Gitaly servers When using standalone Gitaly servers, you must make sure they are the same version as GitLab to ensure full compatibility: 1. On the top bar, select **Menu >** **{admin}** **Admin** on your GitLab instance. 1. On the left sidebar, select **Overview > Gitaly Servers**. 1. Confirm all Gitaly servers indicate that they are up to date. ### Use `gitaly-debug` The `gitaly-debug` command provides "production debugging" tools for Gitaly and Git performance. It is intended to help production engineers and support engineers investigate Gitaly performance problems. If you're using GitLab 11.6 or newer, this tool should be installed on your GitLab or Gitaly server already at `/opt/gitlab/embedded/bin/gitaly-debug`. If you're investigating an older GitLab version you can compile this tool offline and copy the executable to your server: ```shell git clone https://gitlab.com/gitlab-org/gitaly.git cd cmd/gitaly-debug GOOS=linux GOARCH=amd64 go build -o gitaly-debug ``` To see the help page of `gitaly-debug` for a list of supported sub-commands, run: ```shell gitaly-debug -h ``` ### Commits, pushes, and clones return a 401 ```plaintext remote: GitLab: 401 Unauthorized ``` You need to sync your `gitlab-secrets.json` file with your GitLab application nodes. ### Client side gRPC logs Gitaly uses the [gRPC](https://grpc.io/) RPC framework. The Ruby gRPC client has its own log file which may contain useful information when you are seeing Gitaly errors. You can control the log level of the gRPC client with the `GRPC_LOG_LEVEL` environment variable. The default level is `WARN`. You can run a gRPC trace with: ```shell sudo GRPC_TRACE=all GRPC_VERBOSITY=DEBUG gitlab-rake gitlab:gitaly:check ``` ### Server side gRPC logs gRPC tracing can also be enabled in Gitaly itself with the `GODEBUG=http2debug` environment variable. To set this in an Omnibus GitLab install: 1. Add the following to your `gitlab.rb` file: ```ruby gitaly['env'] = { "GODEBUG=http2debug" => "2" } ``` 1. [Reconfigure](../restart_gitlab.md#omnibus-gitlab-reconfigure) GitLab. ### Correlating Git processes with RPCs Sometimes you need to find out which Gitaly RPC created a particular Git process. One method for doing this is by using `DEBUG` logging. However, this needs to be enabled ahead of time and the logs produced are quite verbose. A lightweight method for doing this correlation is by inspecting the environment of the Git process (using its `PID`) and looking at the `CORRELATION_ID` variable: ```shell PID= sudo cat /proc/$PID/environ | tr '\0' '\n' | grep ^CORRELATION_ID= ``` This method isn't reliable for `git cat-file` processes, because Gitaly internally pools and re-uses those across RPCs. ### Observing `gitaly-ruby` traffic [`gitaly-ruby`](configure_gitaly.md#gitaly-ruby) is an internal implementation detail of Gitaly, so, there's not that much visibility into what goes on inside `gitaly-ruby` processes. If you have Prometheus set up to scrape your Gitaly process, you can see request rates and error codes for individual RPCs in `gitaly-ruby` by querying `grpc_client_handled_total`. - In theory, this metric does not differentiate between `gitaly-ruby` and other RPCs. - In practice from GitLab 11.9, all gRPC calls made by Gitaly itself are internal calls from the main Gitaly process to one of its `gitaly-ruby` sidecars. Assuming your `grpc_client_handled_total` counter only observes Gitaly, the following query shows you RPCs are (most likely) internally implemented as calls to `gitaly-ruby`: ```prometheus sum(rate(grpc_client_handled_total[5m])) by (grpc_method) > 0 ``` ### Repository changes fail with a `401 Unauthorized` error If you run Gitaly on its own server and notice these conditions: - Users can successfully clone and fetch repositories by using both SSH and HTTPS. - Users can't push to repositories, or receive a `401 Unauthorized` message when attempting to make changes to them in the web UI. Gitaly may be failing to authenticate with the Gitaly client because it has the [wrong secrets file](configure_gitaly.md#configure-gitaly-servers). Confirm the following are all true: - When any user performs a `git push` to any repository on this Gitaly server, it fails with a `401 Unauthorized` error: ```shell remote: GitLab: 401 Unauthorized To ! [remote rejected] branch-name -> branch-name (pre-receive hook declined) error: failed to push some refs to '' ``` - When any user adds or modifies a file from the repository using the GitLab UI, it immediately fails with a red `401 Unauthorized` banner. - Creating a new project and [initializing it with a README](../../user/project/working_with_projects.md#blank-projects) successfully creates the project but doesn't create the README. - When [tailing the logs](https://docs.gitlab.com/omnibus/settings/logs.html#tail-logs-in-a-console-on-the-server) on a Gitaly client and reproducing the error, you get `401` errors when reaching the [`/api/v4/internal/allowed`](../../development/internal_api.md) endpoint: ```shell # api_json.log { "time": "2019-07-18T00:30:14.967Z", "severity": "INFO", "duration": 0.57, "db": 0, "view": 0.57, "status": 401, "method": "POST", "path": "\/api\/v4\/internal\/allowed", "params": [ { "key": "action", "value": "git-receive-pack" }, { "key": "changes", "value": "REDACTED" }, { "key": "gl_repository", "value": "REDACTED" }, { "key": "project", "value": "\/path\/to\/project.git" }, { "key": "protocol", "value": "web" }, { "key": "env", "value": "{\"GIT_ALTERNATE_OBJECT_DIRECTORIES\":[],\"GIT_ALTERNATE_OBJECT_DIRECTORIES_RELATIVE\":[],\"GIT_OBJECT_DIRECTORY\":null,\"GIT_OBJECT_DIRECTORY_RELATIVE\":null}" }, { "key": "user_id", "value": "2" }, { "key": "secret_token", "value": "[FILTERED]" } ], "host": "gitlab.example.com", "ip": "REDACTED", "ua": "Ruby", "route": "\/api\/:version\/internal\/allowed", "queue_duration": 4.24, "gitaly_calls": 0, "gitaly_duration": 0, "correlation_id": "XPUZqTukaP3" } # nginx_access.log [IP] - - [18/Jul/2019:00:30:14 +0000] "POST /api/v4/internal/allowed HTTP/1.1" 401 30 "" "Ruby" ``` To fix this problem, confirm that your [`gitlab-secrets.json` file](configure_gitaly.md#configure-gitaly-servers) on the Gitaly server matches the one on Gitaly client. If it doesn't match, update the secrets file on the Gitaly server to match the Gitaly client, then [reconfigure](../restart_gitlab.md#omnibus-gitlab-reconfigure). ### Command line tools cannot connect to Gitaly gRPC cannot reach your Gitaly server if: - You can't connect to a Gitaly server with command-line tools. - Certain actions result in a `14: Connect Failed` error message. Verify you can reach Gitaly by using TCP: ```shell sudo gitlab-rake gitlab:tcp_check[GITALY_SERVER_IP,GITALY_LISTEN_PORT] ``` If the TCP connection: - Fails, check your network settings and your firewall rules. - Succeeds, your networking and firewall rules are correct. If you use proxy servers in your command line environment such as Bash, these can interfere with your gRPC traffic. If you use Bash or a compatible command line environment, run the following commands to determine whether you have proxy servers configured: ```shell echo $http_proxy echo $https_proxy ``` If either of these variables have a value, your Gitaly CLI connections may be getting routed through a proxy which cannot connect to Gitaly. To remove the proxy setting, run the following commands (depending on which variables had values): ```shell unset http_proxy unset https_proxy ``` ### Permission denied errors appearing in Gitaly or Praefect logs when accessing repositories You might see the following in Gitaly and Praefect logs: ```shell { ... "error":"rpc error: code = PermissionDenied desc = permission denied", "grpc.code":"PermissionDenied", "grpc.meta.client_name":"gitlab-web", "grpc.request.fullMethod":"/gitaly.ServerService/ServerInfo", "level":"warning", "msg":"finished unary call with code PermissionDenied", ... } ``` This is a GRPC call [error response code](https://grpc.github.io/grpc/core/md_doc_statuscodes.html). If this error occurs, even though [the Gitaly auth tokens are set up correctly](#praefect-errors-in-logs), it's likely that the Gitaly servers are experiencing [clock drift](https://en.wikipedia.org/wiki/Clock_drift). Ensure the Gitaly clients and servers are synchronized, and use an NTP time server to keep them synchronized. ### Gitaly not listening on new address after reconfiguring When updating the `gitaly['listen_addr']` or `gitaly['prometheus_listen_addr']` values, Gitaly may continue to listen on the old address after a `sudo gitlab-ctl reconfigure`. When this occurs, run `sudo gitlab-ctl restart` to resolve the issue. This should no longer be necessary because [this issue](https://gitlab.com/gitlab-org/gitaly/-/issues/2521) is resolved. ### Permission denied errors appearing in Gitaly logs when accessing repositories from a standalone Gitaly node If this error occurs even though file permissions are correct, it's likely that the Gitaly node is experiencing [clock drift](https://en.wikipedia.org/wiki/Clock_drift). Please ensure that the GitLab and Gitaly nodes are synchronized and use an NTP time server to keep them synchronized if possible. ## Troubleshoot Praefect (Gitaly Cluster) The following sections provide possible solutions to Gitaly Cluster errors. ### Praefect errors in logs If you receive an error, check `/var/log/gitlab/gitlab-rails/production.log`. Here are common errors and potential causes: - 500 response code - **ActionView::Template::Error (7:permission denied)** - `praefect['auth_token']` and `gitlab_rails['gitaly_token']` do not match on the GitLab server. - **Unable to save project. Error: 7:permission denied** - Secret token in `praefect['storage_nodes']` on GitLab server does not match the value in `gitaly['auth_token']` on one or more Gitaly servers. - 503 response code - **GRPC::Unavailable (14:failed to connect to all addresses)** - GitLab was unable to reach Praefect. - **GRPC::Unavailable (14:all SubCons are in TransientFailure...)** - Praefect cannot reach one or more of its child Gitaly nodes. Try running the Praefect connection checker to diagnose. ### Determine primary Gitaly node To determine the current primary Gitaly node for a specific Praefect node: - Use the `Shard Primary Election` [Grafana chart](praefect.md#grafana) on the [`Gitlab Omnibus - Praefect` dashboard](https://gitlab.com/gitlab-org/grafana-dashboards/-/blob/master/omnibus/praefect.json). This is recommended. - If you do not have Grafana set up, use the following command on each host of each Praefect node: ```shell curl localhost:9652/metrics | grep gitaly_praefect_primaries` ``` ### Relation does not exist errors By default Praefect database tables are created automatically by `gitlab-ctl reconfigure` task. However, the Praefect database tables are not created on initial reconfigure and can throw errors that relations do not exist if either: - The `gitlab-ctl reconfigure` command isn't executed. - There are errors during the execution. For example: - `ERROR: relation "node_status" does not exist at character 13` - `ERROR: relation "replication_queue_lock" does not exist at character 40` - This error: ```json {"level":"error","msg":"Error updating node: pq: relation \"node_status\" does not exist","pid":210882,"praefectName":"gitlab1x4m:0.0.0.0:2305","time":"2021-04-01T19:26:19.473Z","virtual_storage":"praefect-cluster-1"} ``` To solve this, the database schema migration can be done using `sql-migrate` sub-command of the `praefect` command: ```shell $ sudo /opt/gitlab/embedded/bin/praefect -config /var/opt/gitlab/praefect/config.toml sql-migrate praefect sql-migrate: OK (applied 21 migrations) ```