--- stage: Monitor group: Respond info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/product/ux/technical-writing/#assignments --- # Log system **(FREE SELF)** GitLab has an advanced log system where everything is logged, so you can analyze your instance using various system log files. In addition to system log files, GitLab Enterprise Edition provides [Audit Events](../audit_events.md). System log files are typically plain text in a standard log file format. This guide talks about how to read and use these system log files. Read more about the log system and using the logs: - [Customize logging on Omnibus GitLab installations](https://docs.gitlab.com/omnibus/settings/logs.html) including adjusting log retention, log forwarding, switching logs from JSON to plain text logging, and more. - [How to parse and analyze JSON logs](../logs/log_parsing.md). ## Log Levels Each log message has an assigned log level that indicates its importance and verbosity. Each logger has an assigned minimum log level. A logger emits a log message only if its log level is equal to or above the minimum log level. The following log levels are supported: | Level | Name | |:------|:----------| | 0 | `DEBUG` | | 1 | `INFO` | | 2 | `WARN` | | 3 | `ERROR` | | 4 | `FATAL` | | 5 | `UNKNOWN` | GitLab loggers emit all log messages because they are set to `DEBUG` by default. ### Override default log level You can override the minimum log level for GitLab loggers using the `GITLAB_LOG_LEVEL` environment variable. Valid values are either a value of `0` to `5`, or the name of the log level. Example: ```shell GITLAB_LOG_LEVEL=info ``` For some services, other log levels are in place that are not affected by this setting. Some of these services have their own environment variables to override the log level. For example: | Service | Log level | Environment variable | |:---------------------|:----------|:---------------------| | GitLab API | `INFO` | | | GitLab Cleanup | `INFO` | `DEBUG` | | GitLab Doctor | `INFO` | `VERBOSE` | | GitLab Export | `INFO` | `EXPORT_DEBUG` | | GitLab Geo | `INFO` | | | GitLab Import | `INFO` | `IMPORT_DEBUG` | | GitLab QA Runtime | `INFO` | `QA_LOG_LEVEL` | | Google APIs | `INFO` | | | Rack Timeout | `ERROR` | | | Sidekiq (server) | `INFO` | | | Snowplow Tracker | `FATAL` | | | gRPC Client (Gitaly) | `WARN` | `GRPC_LOG_LEVEL` | ## Log Rotation The logs for a given service may be managed and rotated by: - `logrotate` - `svlogd` (`runit`'s service logging daemon) - `logrotate` and `svlogd` - Or not at all The following table includes information about what's responsible for managing and rotating logs for the included services. Logs [managed by `svlogd`](https://docs.gitlab.com/omnibus/settings/logs.html#runit-logs) are written to a file called `current`. The `logrotate` service built into GitLab [manages all logs](https://docs.gitlab.com/omnibus/settings/logs.html#logrotate) except those captured by `runit`. | Log type | Managed by logrotate | Managed by svlogd/runit | |:------------------------------------------------|:------------------------|:------------------------| | [Alertmanager Logs](#alertmanager-logs) | **{dotted-circle}** No | **{check-circle}** Yes | | [Crond Logs](#crond-logs) | **{dotted-circle}** No | **{check-circle}** Yes | | [Gitaly](#gitaly-logs) | **{check-circle}** Yes | **{check-circle}** Yes | | [GitLab Exporter for Omnibus](#gitlab-exporter) | **{dotted-circle}** No | **{check-circle}** Yes | | [GitLab Pages Logs](#pages-logs) | **{check-circle}** Yes | **{check-circle}** Yes | | GitLab Rails | **{check-circle}** Yes | **{dotted-circle}** No | | [GitLab Shell Logs](#gitlab-shelllog) | **{check-circle}** Yes | **{dotted-circle}** No | | [Grafana Logs](#grafana-logs) | **{dotted-circle}** No | **{check-circle}** Yes | | [LogRotate Logs](#logrotate-logs) | **{dotted-circle}** No | **{check-circle}** Yes | | [Mailroom](#mail_room_jsonlog-default) | **{check-circle}** Yes | **{check-circle}** Yes | | [NGINX](#nginx-logs) | **{check-circle}** Yes | **{check-circle}** Yes | | [PostgreSQL Logs](#postgresql-logs) | **{dotted-circle}** No | **{check-circle}** Yes | | [Praefect Logs](#praefect-logs) | **{dotted-circle}** Yes | **{check-circle}** Yes | | [Prometheus Logs](#prometheus-logs) | **{dotted-circle}** No | **{check-circle}** Yes | | [Puma](#puma-logs) | **{check-circle}** Yes | **{check-circle}** Yes | | [Redis Logs](#redis-logs) | **{dotted-circle}** No | **{check-circle}** Yes | | [Registry Logs](#registry-logs) | **{dotted-circle}** No | **{check-circle}** Yes | | [Workhorse Logs](#workhorse-logs) | **{check-circle}** Yes | **{check-circle}** Yes | ## `production_json.log` Depending on your installation method, this file is located at: - Omnibus GitLab: `/var/log/gitlab/gitlab-rails/production_json.log` - Installations from source: `/home/git/gitlab/log/production_json.log` It contains a structured log for Rails controller requests received from GitLab, thanks to [Lograge](https://github.com/roidrage/lograge/). Requests from the API are logged to a separate file in `api_json.log`. Each line contains JSON that can be ingested by services like Elasticsearch and Splunk. Line breaks were added to examples for legibility: ```json { "method":"GET", "path":"/gitlab/gitlab-foss/issues/1234", "format":"html", "controller":"Projects::IssuesController", "action":"show", "status":200, "time":"2017-08-08T20:15:54.821Z", "params":[{"key":"param_key","value":"param_value"}], "remote_ip":"18.245.0.1", "user_id":1, "username":"admin", "queue_duration_s":0.0, "gitaly_calls":16, "gitaly_duration_s":0.16, "redis_calls":115, "redis_duration_s":0.13, "redis_read_bytes":1507378, "redis_write_bytes":2920, "correlation_id":"O1SdybnnIq7", "cpu_s":17.50, "db_duration_s":0.08, "view_duration_s":2.39, "duration_s":20.54, "pid": 81836, "worker_id":"puma_0" } ``` This example was a GET request for a specific issue. Each line also contains performance data, with times in seconds: - `duration_s`: Total time to retrieve the request - `queue_duration_s`: Total time the request was queued inside GitLab Workhorse - `view_duration_s`: Total time inside the Rails views - `db_duration_s`: Total time to retrieve data from PostgreSQL - `cpu_s`: Total time spent on CPU - `gitaly_duration_s`: Total time by Gitaly calls - `gitaly_calls`: Total number of calls made to Gitaly - `redis_calls`: Total number of calls made to Redis - `redis_duration_s`: Total time to retrieve data from Redis - `redis_read_bytes`: Total bytes read from Redis - `redis_write_bytes`: Total bytes written to Redis - `redis__calls`: Total number of calls made to a Redis instance - `redis__duration_s`: Total time to retrieve data from a Redis instance - `redis__read_bytes`: Total bytes read from a Redis instance - `redis__write_bytes`: Total bytes written to a Redis instance - `pid`: The worker's Linux process ID (changes when workers restart) - `worker_id`: The worker's logical ID (does not change when workers restart) User clone and fetch activity using HTTP transport appears in the log as `action: git_upload_pack`. In addition, the log contains the originating IP address, (`remote_ip`), the user's ID (`user_id`), and username (`username`). Some endpoints (such as `/search`) may make requests to Elasticsearch if using [Advanced Search](../../user/search/advanced_search.md). These additionally log `elasticsearch_calls` and `elasticsearch_call_duration_s`, which correspond to: - `elasticsearch_calls`: Total number of calls to Elasticsearch - `elasticsearch_duration_s`: Total time taken by Elasticsearch calls - `elasticsearch_timed_out_count`: Total number of calls to Elasticsearch that timed out and therefore returned partial results ActionCable connection and subscription events are also logged to this file and they follow the previous format. The `method`, `path`, and `format` fields are not applicable, and are always empty. The ActionCable connection or channel class is used as the `controller`. ```json { "method":null, "path":null, "format":null, "controller":"IssuesChannel", "action":"subscribe", "status":200, "time":"2020-05-14T19:46:22.008Z", "params":[{"key":"project_path","value":"gitlab/gitlab-foss"},{"key":"iid","value":"1"}], "remote_ip":"127.0.0.1", "user_id":1, "username":"admin", "ua":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:76.0) Gecko/20100101 Firefox/76.0", "correlation_id":"jSOIEynHCUa", "duration_s":0.32566 } ``` NOTE: Starting with GitLab 12.5, if an error occurs, an `exception` field is included with `class`, `message`, and `backtrace`. Previous versions included an `error` field instead of `exception.class` and `exception.message`. For example: ```json { "method": "GET", "path": "/admin", "format": "html", "controller": "Admin::DashboardController", "action": "index", "status": 500, "time": "2019-11-14T13:12:46.156Z", "params": [], "remote_ip": "127.0.0.1", "user_id": 1, "username": "root", "ua": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:70.0) Gecko/20100101 Firefox/70.0", "queue_duration": 274.35, "correlation_id": "KjDVUhNvvV3", "queue_duration_s":0.0, "gitaly_calls":16, "gitaly_duration_s":0.16, "redis_calls":115, "redis_duration_s":0.13, "correlation_id":"O1SdybnnIq7", "cpu_s":17.50, "db_duration_s":0.08, "view_duration_s":2.39, "duration_s":20.54, "pid": 81836, "worker_id": "puma_0", "exception.class": "NameError", "exception.message": "undefined local variable or method `adsf' for #", "exception.backtrace": [ "app/controllers/admin/dashboard_controller.rb:11:in `index'", "ee/app/controllers/ee/admin/dashboard_controller.rb:14:in `index'", "ee/lib/gitlab/ip_address_state.rb:10:in `with'", "ee/app/controllers/ee/application_controller.rb:43:in `set_current_ip_address'", "lib/gitlab/session.rb:11:in `with_session'", "app/controllers/application_controller.rb:450:in `set_session_storage'", "app/controllers/application_controller.rb:444:in `set_locale'", "ee/lib/gitlab/jira/middleware.rb:19:in `call'" ] } ``` ## `production.log` Depending on your installation method, this file is located at: - Omnibus GitLab: `/var/log/gitlab/gitlab-rails/production.log` - Installations from source: `/home/git/gitlab/log/production.log` It contains information about all performed requests. You can see the URL and type of request, IP address, and what parts of code were involved to service this particular request. Also, you can see all SQL requests performed, and how much time each took. This task is more useful for GitLab contributors and developers. Use part of this log file when you're reporting bugs. For example: ```plaintext Started GET "/gitlabhq/yaml_db/tree/master" for 168.111.56.1 at 2015-02-12 19:34:53 +0200 Processing by Projects::TreeController#show as HTML Parameters: {"project_id"=>"gitlabhq/yaml_db", "id"=>"master"} ... [CUT OUT] Namespaces"."created_at" DESC, "namespaces"."id" DESC LIMIT 1 [["id", 26]] CACHE (0.0ms) SELECT "members".* FROM "members" WHERE "members"."source_type" = 'Project' AND "members"."type" IN ('ProjectMember') AND "members"."source_id" = $1 AND "members"."source_type" = $2 AND "members"."user_id" = 1 ORDER BY "members"."created_at" DESC, "members"."id" DESC LIMIT 1 [["source_id", 18], ["source_type", "Project"]] CACHE (0.0ms) SELECT "members".* FROM "members" WHERE "members"."source_type" = 'Project' AND "members". (1.4ms) SELECT COUNT(*) FROM "merge_requests" WHERE "merge_requests"."target_project_id" = $1 AND ("merge_requests"."state" IN ('opened','reopened')) [["target_project_id", 18]] Rendered layouts/nav/_project.html.haml (28.0ms) Rendered layouts/_collapse_button.html.haml (0.2ms) Rendered layouts/_flash.html.haml (0.1ms) Rendered layouts/_page.html.haml (32.9ms) Completed 200 OK in 166ms (Views: 117.4ms | ActiveRecord: 27.2ms) ``` In this example, the server processed an HTTP request with URL `/gitlabhq/yaml_db/tree/master` from IP `168.111.56.1` at `2015-02-12 19:34:53 +0200`. The request was processed by `Projects::TreeController`. ## `api_json.log` Depending on your installation method, this file is located at: - Omnibus GitLab: `/var/log/gitlab/gitlab-rails/api_json.log` - Installations from source: `/home/git/gitlab/log/api_json.log` It helps you see requests made directly to the API. For example: ```json { "time":"2018-10-29T12:49:42.123Z", "severity":"INFO", "duration":709.08, "db":14.59, "view":694.49, "status":200, "method":"GET", "path":"/api/v4/projects", "params":[{"key":"action","value":"git-upload-pack"},{"key":"changes","value":"_any"},{"key":"key_id","value":"secret"},{"key":"secret_token","value":"[FILTERED]"}], "host":"localhost", "remote_ip":"::1", "ua":"Ruby", "route":"/api/:version/projects", "user_id":1, "username":"root", "queue_duration":100.31, "gitaly_calls":30, "gitaly_duration":5.36, "pid": 81836, "worker_id": "puma_0", ... } ``` This entry shows an internal endpoint accessed to check whether an associated SSH key can download the project in question by using a `git fetch` or `git clone`. In this example, we see: - `duration`: Total time in milliseconds to retrieve the request - `queue_duration`: Total time in milliseconds the request was queued inside GitLab Workhorse - `method`: The HTTP method used to make the request - `path`: The relative path of the query - `params`: Key-value pairs passed in a query string or HTTP body (sensitive parameters, such as passwords and tokens, are filtered out) - `ua`: The User-Agent of the requester ## `application.log` Depending on your installation method, this file is located at: - Omnibus GitLab: `/var/log/gitlab/gitlab-rails/application.log` - Installations from source: `/home/git/gitlab/log/application.log` It helps you discover events happening in your instance such as user creation and project deletion. For example: ```plaintext October 06, 2014 11:56: User "Administrator" (admin@example.com) was created October 06, 2014 11:56: Documentcloud created a new project "Documentcloud / Underscore" October 06, 2014 11:56: Gitlab Org created a new project "Gitlab Org / Gitlab Ce" October 07, 2014 11:25: User "Claudie Hodkiewicz" (nasir_stehr@olson.co.uk) was removed October 07, 2014 11:25: Project "project133" was removed ``` ## `application_json.log` > [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/22812) in GitLab 12.7. Depending on your installation method, this file is located at: - Omnibus GitLab: `/var/log/gitlab/gitlab-rails/application_json.log` - Installations from source: `/home/git/gitlab/log/application_json.log` It contains the JSON version of the logs in `application.log`, like this example: ```json { "severity":"INFO", "time":"2020-01-14T13:35:15.466Z", "correlation_id":"3823a1550b64417f9c9ed8ee0f48087e", "message":"User \"Administrator\" (admin@example.com) was created" } { "severity":"INFO", "time":"2020-01-14T13:35:15.466Z", "correlation_id":"78e3df10c9a18745243d524540bd5be4", "message":"Project \"project133\" was removed" } ``` ## `integrations_json.log` Depending on your installation method, this file is located at: - Omnibus GitLab: `/var/log/gitlab/gitlab-rails/integrations_json.log` - Installations from source: `/home/git/gitlab/log/integrations_json.log` It contains information about [integration](../../user/project/integrations/index.md) activities, such as Jira, Asana, and irker services. It uses JSON format, like this example: ```json { "severity":"ERROR", "time":"2018-09-06T14:56:20.439Z", "service_class":"Integrations::Jira", "project_id":8, "project_path":"h5bp/html5-boilerplate", "message":"Error sending message", "client_url":"http://jira.gitlap.com:8080", "error":"execution expired" } { "severity":"INFO", "time":"2018-09-06T17:15:16.365Z", "service_class":"Integrations::Jira", "project_id":3, "project_path":"namespace2/project2", "message":"Successfully posted", "client_url":"http://jira.example.com" } ``` ## `kubernetes.log` Depending on your installation method, this file is located at: - Omnibus GitLab: `/var/log/gitlab/gitlab-rails/kubernetes.log` - Installations from source: `/home/git/gitlab/log/kubernetes.log` It logs information related to the Kubernetes Integration, including errors during installing cluster applications on your managed Kubernetes clusters. Each line contains JSON that can be ingested by services like Elasticsearch and Splunk. Line breaks have been added to the following example for clarity: ```json { "severity":"ERROR", "time":"2018-11-23T15:14:54.652Z", "exception":"Kubeclient::HttpError", "error_code":401, "service":"Clusters::Applications::CheckInstallationProgressService", "app_id":14, "project_ids":[1], "group_ids":[], "message":"Unauthorized" } { "severity":"ERROR", "time":"2018-11-23T15:42:11.647Z", "exception":"Kubeclient::HttpError", "error_code":null, "service":"Clusters::Applications::InstallService", "app_id":2, "project_ids":[19], "group_ids":[], "message":"SSL_connect returned=1 errno=0 state=error: certificate verify failed (unable to get local issuer certificate)" } ``` ## `git_json.log` Depending on your installation method, this file is located at: - Omnibus GitLab: `/var/log/gitlab/gitlab-rails/git_json.log` - Installations from source: `/home/git/gitlab/log/git_json.log` After GitLab version 12.2, this file was renamed from `githost.log` to `git_json.log` and stored in JSON format. GitLab has to interact with Git repositories, but in some rare cases something can go wrong. If this happens, you need to know exactly what happened. This log file contains all failed requests from GitLab to Git repositories. In the majority of cases this file is useful for developers only. For example: ```json { "severity":"ERROR", "time":"2019-07-19T22:16:12.528Z", "correlation_id":"FeGxww5Hj64", "message":"Command failed [1]: /usr/bin/git --git-dir=/Users/vsizov/gitlab-development-kit/gitlab/tmp/tests/gitlab-satellites/group184/gitlabhq/.git --work-tree=/Users/vsizov/gitlab-development-kit/gitlab/tmp/tests/gitlab-satellites/group184/gitlabhq merge --no-ff -mMerge branch 'feature_conflict' into 'feature' source/feature_conflict\n\nerror: failed to push some refs to '/Users/vsizov/gitlab-development-kit/repositories/gitlabhq/gitlab_git.git'" } ``` ## `audit_json.log` **(FREE)** NOTE: GitLab Free tracks a small number of different audit events. GitLab Premium tracks many more. Depending on your installation method, this file is located at: - Omnibus GitLab: `/var/log/gitlab/gitlab-rails/audit_json.log` - Installations from source: `/home/git/gitlab/log/audit_json.log` Changes to group or project settings and memberships (`target_details`) are logged to this file. For example: ```json { "severity":"INFO", "time":"2018-10-17T17:38:22.523Z", "author_id":3, "entity_id":2, "entity_type":"Project", "change":"visibility", "from":"Private", "to":"Public", "author_name":"John Doe4", "target_id":2, "target_type":"Project", "target_details":"namespace2/project2" } ``` ## Sidekiq Logs NOTE: In Omnibus GitLab `12.10` or earlier, the Sidekiq log is at `/var/log/gitlab/gitlab-rails/sidekiq.log`. For Omnibus GitLab installations, some Sidekiq logs are in `/var/log/gitlab/sidekiq/current` and as follows. ### `sidekiq.log` Depending on your installation method, this file is located at: - Omnibus GitLab: `/var/log/gitlab/sidekiq/current` - Installations from source: `/home/git/gitlab/log/sidekiq.log` GitLab uses background jobs for processing tasks which can take a long time. All information about processing these jobs are written down to this file. For example: ```plaintext 2014-06-10T07:55:20Z 2037 TID-tm504 ERROR: /opt/bitnami/apps/discourse/htdocs/vendor/bundle/ruby/1.9.1/gems/redis-3.0.7/lib/redis/client.rb:228:in `read' 2014-06-10T18:18:26Z 14299 TID-55uqo INFO: Booting Sidekiq 3.0.0 with redis options {:url=>"redis://localhost:6379/0", :namespace=>"sidekiq"} ``` Instead of the previous format, you can opt to generate JSON logs for Sidekiq. For example: ```json { "severity":"INFO", "time":"2018-04-03T22:57:22.071Z", "queue":"cronjob:update_all_mirrors", "args":[], "class":"UpdateAllMirrorsWorker", "retry":false, "queue_namespace":"cronjob", "jid":"06aeaa3b0aadacf9981f368e", "created_at":"2018-04-03T22:57:21.930Z", "enqueued_at":"2018-04-03T22:57:21.931Z", "pid":10077, "worker_id":"sidekiq_0", "message":"UpdateAllMirrorsWorker JID-06aeaa3b0aadacf9981f368e: done: 0.139 sec", "job_status":"done", "duration":0.139, "completed_at":"2018-04-03T22:57:22.071Z", "db_duration":0.05, "db_duration_s":0.0005, "gitaly_duration":0, "gitaly_calls":0 } ``` For Omnibus GitLab installations, add the configuration option: ```ruby sidekiq['log_format'] = 'json' ``` For installations from source, edit the `gitlab.yml` and set the Sidekiq `log_format` configuration option: ```yaml ## Sidekiq sidekiq: log_format: json ``` ### `sidekiq_client.log` > [Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/26586) in GitLab 12.9. Depending on your installation method, this file is located at: - Omnibus GitLab: `/var/log/gitlab/gitlab-rails/sidekiq_client.log` - Installations from source: `/home/git/gitlab/log/sidekiq_client.log` This file contains logging information about jobs before Sidekiq starts processing them, such as before being enqueued. This log file follows the same structure as [`sidekiq.log`](#sidekiqlog), so it is structured as JSON if you've configured this for Sidekiq as mentioned above. ## `gitlab-shell.log` GitLab Shell is used by GitLab for executing Git commands and provide SSH access to Git repositories. ### For GitLab versions 12.10 and up Information containing `git-{upload-pack,receive-pack}` requests is at `/var/log/gitlab/gitlab-shell/gitlab-shell.log`. Information about hooks to GitLab Shell from Gitaly is at `/var/log/gitlab/gitaly/current`. Example log entries for `/var/log/gitlab/gitlab-shell/gitlab-shell.log`: ```json { "duration_ms": 74.104, "level": "info", "method": "POST", "msg": "Finished HTTP request", "time": "2020-04-17T20:28:46Z", "url": "http://127.0.0.1:8080/api/v4/internal/allowed" } { "command": "git-upload-pack", "git_protocol": "", "gl_project_path": "root/example", "gl_repository": "project-1", "level": "info", "msg": "executing git command", "time": "2020-04-17T20:28:46Z", "user_id": "user-1", "username": "root" } ``` Example log entries for `/var/log/gitlab/gitaly/current`: ```json { "method": "POST", "url": "http://127.0.0.1:8080/api/v4/internal/allowed", "duration": 0.058012959, "gitaly_embedded": true, "pid": 16636, "level": "info", "msg": "finished HTTP request", "time": "2020-04-17T20:29:08+00:00" } { "method": "POST", "url": "http://127.0.0.1:8080/api/v4/internal/pre_receive", "duration": 0.031022552, "gitaly_embedded": true, "pid": 16636, "level": "info", "msg": "finished HTTP request", "time": "2020-04-17T20:29:08+00:00" } ``` ### For GitLab versions 12.5 through 12.9 For GitLab 12.5 to 12.9, depending on your installation method, this file is located at: - Omnibus GitLab: `/var/log/gitlab/gitaly/gitlab-shell.log` - Installation from source: `/home/git/gitaly/gitlab-shell.log` Example log entries: ```json { "method": "POST", "url": "http://127.0.0.1:8080/api/v4/internal/post_receive", "duration": 0.031809164, "gitaly_embedded": true, "pid": 27056, "level": "info", "msg": "finished HTTP request", "time": "2020-04-17T16:24:38+00:00" } ``` ### For GitLab 12.5 and earlier For GitLab 12.5 and earlier, the file is at `/var/log/gitlab/gitlab-shell/gitlab-shell.log`. Example log entries: ```plaintext I, [2015-02-13T06:17:00.671315 #9291] INFO -- : Adding project root/example.git at . I, [2015-02-13T06:17:00.679433 #9291] INFO -- : Moving existing hooks directory and symlinking global hooks directory for /var/opt/gitlab/git-data/repositories/root/example.git. ``` User clone/fetch activity using SSH transport appears in this log as `executing git command [Introduced](https://gitlab.com/gitlab-org/gitaly/-/merge_requests/2678) in GitLab 13.6. This file is at `/var/log/gitlab/gitaly/gitaly_ruby_json.log` and is produced by [`gitaly-ruby`](../gitaly/reference.md#gitaly-ruby). It contains an access log of gRPC calls made by Gitaly to `gitaly-ruby`. ### `gitaly_hooks.log` This file is at `/var/log/gitlab/gitaly/gitaly_hooks.log` and is produced by `gitaly-hooks` command. It also contains records about failures received during processing of the responses from GitLab API. ## Puma Logs ### `puma_stdout.log` Depending on your installation method, this file is located at: - Omnibus GitLab: `/var/log/gitlab/puma/puma_stdout.log` - Installations from source: `/home/git/gitlab/log/puma_stdout.log` ### `puma_stderr.log` Depending on your installation method, this file is located at: - Omnibus GitLab: `/var/log/gitlab/puma/puma_stderr.log` - Installations from source: `/home/git/gitlab/log/puma_stderr.log` ## `repocheck.log` Depending on your installation method, this file is located at: - Omnibus GitLab: `/var/log/gitlab/gitlab-rails/repocheck.log` - Installations from source: `/home/git/gitlab/log/repocheck.log` It logs information whenever a [repository check is run](../repository_checks.md) on a project. ## `importer.log` Depending on your installation method, this file is located at: - Omnibus GitLab: `/var/log/gitlab/gitlab-rails/importer.log` - Installations from source: `/home/git/gitlab/log/importer.log` It logs the progress of the import process. ## `exporter.log` > Introduced in GitLab 13.1. Depending on your installation method, this file is located at: - Omnibus GitLab: `/var/log/gitlab/gitlab-rails/exporter.log` - Installations from source: `/home/git/gitlab/log/exporter.log` It logs the progress of the export process. ## `features_json.log` > [Introduced](https://gitlab.com/gitlab-org/gitlab-foss/-/issues/59587) in GitLab 13.7. Depending on your installation method, this file is located at: - Omnibus GitLab: `/var/log/gitlab/gitlab-rails/features_json.log` - Installations from source: `/home/git/gitlab/log/features_json.log` The modification events from [Feature flags in development of GitLab](../../development/feature_flags/index.md) are recorded in this file. For example: ```json {"severity":"INFO","time":"2020-11-24T02:30:59.860Z","correlation_id":null,"key":"cd_auto_rollback","action":"enable","extra.thing":"true"} {"severity":"INFO","time":"2020-11-24T02:31:29.108Z","correlation_id":null,"key":"cd_auto_rollback","action":"enable","extra.thing":"true"} {"severity":"INFO","time":"2020-11-24T02:31:29.129Z","correlation_id":null,"key":"cd_auto_rollback","action":"disable","extra.thing":"false"} {"severity":"INFO","time":"2020-11-24T02:31:29.177Z","correlation_id":null,"key":"cd_auto_rollback","action":"enable","extra.thing":"Project:1"} {"severity":"INFO","time":"2020-11-24T02:31:29.183Z","correlation_id":null,"key":"cd_auto_rollback","action":"disable","extra.thing":"Project:1"} {"severity":"INFO","time":"2020-11-24T02:31:29.188Z","correlation_id":null,"key":"cd_auto_rollback","action":"enable_percentage_of_time","extra.percentage":"50"} {"severity":"INFO","time":"2020-11-24T02:31:29.193Z","correlation_id":null,"key":"cd_auto_rollback","action":"disable_percentage_of_time"} {"severity":"INFO","time":"2020-11-24T02:31:29.198Z","correlation_id":null,"key":"cd_auto_rollback","action":"enable_percentage_of_actors","extra.percentage":"50"} {"severity":"INFO","time":"2020-11-24T02:31:29.203Z","correlation_id":null,"key":"cd_auto_rollback","action":"disable_percentage_of_actors"} {"severity":"INFO","time":"2020-11-24T02:31:29.329Z","correlation_id":null,"key":"cd_auto_rollback","action":"remove"} ``` ## `auth.log` > Introduced in GitLab 12.0. Depending on your installation method, this file is located at: - Omnibus GitLab: `/var/log/gitlab/gitlab-rails/auth.log` - Installations from source: `/home/git/gitlab/log/auth.log` This log records: - Requests over the [Rate Limit](../../user/admin_area/settings/rate_limits_on_raw_endpoints.md) on raw endpoints. - [Protected paths](../../user/admin_area/settings/protected_paths.md) abusive requests. - In GitLab versions [12.3](https://gitlab.com/gitlab-org/gitlab/-/issues/29239) and later, user ID and username, if available. ## `graphql_json.log` > [Introduced](https://gitlab.com/gitlab-org/gitlab-foss/-/issues/59587) in GitLab 12.0. Depending on your installation method, this file is located at: - Omnibus GitLab: `/var/log/gitlab/gitlab-rails/graphql_json.log` - Installations from source: `/home/git/gitlab/log/graphql_json.log` GraphQL queries are recorded in the file. For example: ```json {"query_string":"query IntrospectionQuery{__schema {queryType { name },mutationType { name }}}...(etc)","variables":{"a":1,"b":2},"complexity":181,"depth":1,"duration_s":7} ``` ## `migrations.log` > Introduced in GitLab 12.3. Depending on your installation method, this file is located at: - Omnibus GitLab: `/var/log/gitlab/gitlab-rails/migrations.log` - Installations from source: `/home/git/gitlab/log/migrations.log` ## `mail_room_json.log` (default) > [Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/19186) in GitLab 12.6. Depending on your installation method, this file is located at: - Omnibus GitLab: `/var/log/gitlab/mailroom/current` - Installations from source: `/home/git/gitlab/log/mail_room_json.log` This structured log file records internal activity in the `mail_room` gem. Its name and path are configurable, so the name and path may not match the above. ## Reconfigure logs Reconfigure log files are in `/var/log/gitlab/reconfigure` for Omnibus GitLab packages. Installations from source don't have reconfigure logs. A reconfigure log is populated whenever `gitlab-ctl reconfigure` is run manually or as part of an upgrade. Reconfigure logs files are named according to the UNIX timestamp of when the reconfigure was initiated, such as `1509705644.log` ## `sidekiq_exporter.log` and `web_exporter.log` If Prometheus metrics and the Sidekiq Exporter are both enabled, Sidekiq starts a Web server and listen to the defined port (default: `8082`). By default, Sidekiq Exporter access logs are disabled but can be enabled based on your installation method: - Omnibus GitLab: Use the `sidekiq['exporter_log_enabled'] = true` option in `/etc/gitlab/gitlab.rb` - Installations from source: Use the `sidekiq_exporter.log_enabled` option in `gitlab.yml` When enabled, depending on your installation method, this file is located at: - Omnibus GitLab: `/var/log/gitlab/gitlab-rails/sidekiq_exporter.log` - Installations from source: `/home/git/gitlab/log/sidekiq_exporter.log` If Prometheus metrics and the Web Exporter are both enabled, Puma starts a Web server and listen to the defined port (default: `8083`), and access logs are generated in a location based on your installation method: - Omnibus GitLab: `/var/log/gitlab/gitlab-rails/web_exporter.log` - Installations from source: `/home/git/gitlab/log/web_exporter.log` ## `database_load_balancing.log` **(PREMIUM SELF)** > [Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/15442) in GitLab 12.3. Contains details of GitLab [Database Load Balancing](../postgresql/database_load_balancing.md). Depending on your installation method, this file is located at: - Omnibus GitLab: `/var/log/gitlab/gitlab-rails/database_load_balancing.log` - Installations from source: `/home/git/gitlab/log/database_load_balancing.log` ## `elasticsearch.log` **(PREMIUM SELF)** > Introduced in GitLab 12.6. This file logs information related to the Elasticsearch Integration, including errors during indexing or searching Elasticsearch. Depending on your installation method, this file is located at: - Omnibus GitLab: `/var/log/gitlab/gitlab-rails/elasticsearch.log` - Installations from source: `/home/git/gitlab/log/elasticsearch.log` Each line contains JSON that can be ingested by services like Elasticsearch and Splunk. Line breaks have been added to the following example line for clarity: ```json { "severity":"DEBUG", "time":"2019-10-17T06:23:13.227Z", "correlation_id":null, "message":"redacted_search_result", "class_name":"Milestone", "id":2, "ability":"read_milestone", "current_user_id":2, "query":"project" } ``` ## `exceptions_json.log` > [Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/17819) in GitLab 12.6. This file logs the information about exceptions being tracked by `Gitlab::ErrorTracking`, which provides a standard and consistent way of [processing rescued exceptions](https://gitlab.com/gitlab-org/gitlab/-/blob/master/doc/development/logging.md#exception-handling). Depending on your installation method, this file is located at: - Omnibus GitLab: `/var/log/gitlab/gitlab-rails/exceptions_json.log` - Installations from source: `/home/git/gitlab/log/exceptions_json.log` Each line contains JSON that can be ingested by Elasticsearch. For example: ```json { "severity": "ERROR", "time": "2019-12-17T11:49:29.485Z", "correlation_id": "AbDVUrrTvM1", "extra.project_id": 55, "extra.relation_key": "milestones", "extra.relation_index": 1, "exception.class": "NoMethodError", "exception.message": "undefined method `strong_memoize' for #", "exception.backtrace": [ "lib/gitlab/import_export/relation_factory.rb:329:in `unique_relation?'", "lib/gitlab/import_export/relation_factory.rb:345:in `find_or_create_object!'" ] } ``` ## `service_measurement.log` > Introduced in GitLab 13.0. Depending on your installation method, this file is located at: - Omnibus GitLab: `/var/log/gitlab/gitlab-rails/service_measurement.log` - Installations from source: `/home/git/gitlab/log/service_measurement.log` It contains only a single structured log with measurements for each service execution. It contains measurements such as the number of SQL calls, `execution_time`, `gc_stats`, and `memory usage`. For example: ```json { "severity":"INFO", "time":"2020-04-22T16:04:50.691Z","correlation_id":"04f1366e-57a1-45b8-88c1-b00b23dc3616","class":"Projects::ImportExport::ExportService","current_user":"John Doe","project_full_path":"group1/test-export","file_path":"/path/to/archive","gc_stats":{"count":{"before":127,"after":127,"diff":0},"heap_allocated_pages":{"before":10369,"after":10369,"diff":0},"heap_sorted_length":{"before":10369,"after":10369,"diff":0},"heap_allocatable_pages":{"before":0,"after":0,"diff":0},"heap_available_slots":{"before":4226409,"after":4226409,"diff":0},"heap_live_slots":{"before":2542709,"after":2641420,"diff":98711},"heap_free_slots":{"before":1683700,"after":1584989,"diff":-98711},"heap_final_slots":{"before":0,"after":0,"diff":0},"heap_marked_slots":{"before":2542704,"after":2542704,"diff":0},"heap_eden_pages":{"before":10369,"after":10369,"diff":0},"heap_tomb_pages":{"before":0,"after":0,"diff":0},"total_allocated_pages":{"before":10369,"after":10369,"diff":0},"total_freed_pages":{"before":0,"after":0,"diff":0},"total_allocated_objects":{"before":24896308,"after":24995019,"diff":98711},"total_freed_objects":{"before":22353599,"after":22353599,"diff":0},"malloc_increase_bytes":{"before":140032,"after":6650240,"diff":6510208},"malloc_increase_bytes_limit":{"before":25804104,"after":25804104,"diff":0},"minor_gc_count":{"before":94,"after":94,"diff":0},"major_gc_count":{"before":33,"after":33,"diff":0},"remembered_wb_unprotected_objects":{"before":34284,"after":34284,"diff":0},"remembered_wb_unprotected_objects_limit":{"before":68568,"after":68568,"diff":0},"old_objects":{"before":2404725,"after":2404725,"diff":0},"old_objects_limit":{"before":4809450,"after":4809450,"diff":0},"oldmalloc_increase_bytes":{"before":140032,"after":6650240,"diff":6510208},"oldmalloc_increase_bytes_limit":{"before":68537556,"after":68537556,"diff":0}},"time_to_finish":0.12298400001600385,"number_of_sql_calls":70,"memory_usage":"0.0 MiB","label":"process_48616"} ``` ## `geo.log` **(PREMIUM SELF)** Geo stores structured log messages in a `geo.log` file. For Omnibus GitLab installations, this file is at `/var/log/gitlab/gitlab-rails/geo.log`. This file contains information about when Geo attempts to sync repositories and files. Each line in the file contains a separate JSON entry that can be ingested into (for example, Elasticsearch or Splunk). For example: ```json {"severity":"INFO","time":"2017-08-06T05:40:16.104Z","message":"Repository update","project_id":1,"source":"repository","resync_repository":true,"resync_wiki":true,"class":"Gitlab::Geo::LogCursor::Daemon","cursor_delay_s":0.038} ``` This message shows that Geo detected that a repository update was needed for project `1`. ## `update_mirror_service_json.log` Depending on your installation method, this file is located at: - Omnibus GitLab: `/var/log/gitlab/gitlab-rails/update_mirror_service_json.log` - Installations from source: `/home/git/gitlab/log/update_mirror_service_json.log` This file contains information about LFS errors that occurred during project mirroring. While we work to move other project mirroring errors into this log, the [general log](#productionlog) can be used. ```json { "severity":"ERROR", "time":"2020-07-28T23:29:29.473Z", "correlation_id":"5HgIkCJsO53", "user_id":"x", "project_id":"x", "import_url":"https://mirror-source/group/project.git", "error_message":"The LFS objects download list couldn't be imported. Error: Unauthorized" } ``` ## Registry Logs For Omnibus GitLab installations, Container Registry logs are in `/var/log/gitlab/registry/current`. ## NGINX Logs For Omnibus GitLab installations, NGINX logs are in: - `/var/log/gitlab/nginx/gitlab_access.log`: A log of requests made to GitLab - `/var/log/gitlab/nginx/gitlab_error.log`: A log of NGINX errors for GitLab - `/var/log/gitlab/nginx/gitlab_pages_access.log`: A log of requests made to Pages static sites - `/var/log/gitlab/nginx/gitlab_pages_error.log`: A log of NGINX errors for Pages static sites - `/var/log/gitlab/nginx/gitlab_registry_access.log`: A log of requests made to the Container Registry - `/var/log/gitlab/nginx/gitlab_registry_error.log`: A log of NGINX errors for the Container Registry - `/var/log/gitlab/nginx/gitlab_mattermost_access.log`: A log of requests made to Mattermost - `/var/log/gitlab/nginx/gitlab_mattermost_error.log`: A log of NGINX errors for Mattermost Below is the default GitLab NGINX access log format: ```plaintext $remote_addr - $remote_user [$time_local] "$request" $status $body_bytes_sent "$http_referer" "$http_user_agent" ``` ## Pages Logs For Omnibus GitLab installations, Pages logs are in `/var/log/gitlab/gitlab-pages/current`. For example: ```json { "level": "info", "msg": "GitLab Pages Daemon", "revision": "52b2899", "time": "2020-04-22T17:53:12Z", "version": "1.17.0" } { "level": "info", "msg": "URL: https://gitlab.com/gitlab-org/gitlab-pages", "time": "2020-04-22T17:53:12Z" } { "gid": 998, "in-place": false, "level": "info", "msg": "running the daemon as unprivileged user", "time": "2020-04-22T17:53:12Z", "uid": 998 } ``` ## Mattermost Logs For Omnibus GitLab installations, Mattermost logs are in these locations: - `/var/log/gitlab/mattermost/mattermost.log` - `/var/log/gitlab/mattermost/current` ## Workhorse Logs For Omnibus GitLab installations, Workhorse logs are in `/var/log/gitlab/gitlab-workhorse/current`. ## PostgreSQL Logs For Omnibus GitLab installations, PostgreSQL logs are in `/var/log/gitlab/postgresql/current`. ## Prometheus Logs For Omnibus GitLab installations, Prometheus logs are in `/var/log/gitlab/prometheus/current`. ## Redis Logs For Omnibus GitLab installations, Redis logs are in `/var/log/gitlab/redis/current`. ## Alertmanager Logs For Omnibus GitLab installations, Alertmanager logs are in `/var/log/gitlab/alertmanager/current`. ## Crond Logs For Omnibus GitLab installations, crond logs are in `/var/log/gitlab/crond/`. ## Grafana Logs For Omnibus GitLab installations, Grafana logs are in `/var/log/gitlab/grafana/current`. ## LogRotate Logs For Omnibus GitLab installations, `logrotate` logs are in `/var/log/gitlab/logrotate/current`. ## GitLab Monitor Logs For Omnibus GitLab installations, GitLab Monitor logs are in `/var/log/gitlab/gitlab-monitor/`. ## GitLab Exporter For Omnibus GitLab installations, GitLab Exporter logs are in `/var/log/gitlab/gitlab-exporter/current`. ## GitLab agent server For Omnibus GitLab installations, GitLab agent server logs are in `/var/log/gitlab/gitlab-kas/current`. ## Praefect Logs For Omnibus GitLab installations, Praefect logs are in `/var/log/gitlab/praefect/`. GitLab also tracks [Prometheus metrics for Praefect](../gitaly/monitoring.md#monitor-gitaly-cluster). ## Backup log > [Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/63832) in GitLab 14.1. For Omnibus installations, the backup log is located at `/var/log/gitlab/gitlab-rails/backup_json.log`. This log is populated when a [GitLab backup is created](../../raketasks/backup_restore.md). You can use this log to understand how the backup process performed. ## Performance bar stats > [Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/48149) in GitLab 13.7. Depending on your installation method, this file is located at: - Omnibus GitLab: `/var/log/gitlab/gitlab-rails/performance_bar_json.log` - Installations from source: `/home/git/gitlab/log/performance_bar_json.log` Performance bar statistics (currently only duration of SQL queries) are recorded in that file. For example: ```json {"severity":"INFO","time":"2020-12-04T09:29:44.592Z","correlation_id":"33680b1490ccd35981b03639c406a697","filename":"app/models/ci/pipeline.rb","method_path":"app/models/ci/pipeline.rb:each_with_object","request_id":"rYHomD0VJS4","duration_ms":26.889,"count":2,"query_type": "active-record"} ``` These statistics are logged on .com only, disabled on self-deployments. ## Gathering logs When [troubleshooting](../troubleshooting/index.md) issues that aren't localized to one of the previously listed components, it's helpful to simultaneously gather multiple logs and statistics from a GitLab instance. NOTE: GitLab Support often asks for one of these, and maintains the required tools. ### Briefly tail the main logs If the bug or error is readily reproducible, save the main GitLab logs [to a file](../troubleshooting/linux_cheat_sheet.md#files-and-directories) while reproducing the problem a few times: ```shell sudo gitlab-ctl tail | tee /tmp/.log ``` Conclude the log gathering with Control + C. ### GitLabSOS If performance degradations or cascading errors occur that can't readily be attributed to one of the previously listed GitLab components, [GitLabSOS](https://gitlab.com/gitlab-com/support/toolbox/gitlabsos/) can provide a broader perspective of the GitLab instance. For more details and instructions to run it, read [the GitLabSOS documentation](https://gitlab.com/gitlab-com/support/toolbox/gitlabsos/#gitlabsos). ### Fast-stats [Fast-stats](https://gitlab.com/gitlab-com/support/toolbox/fast-stats) is a tool for creating and comparing performance statistics from GitLab logs. For more details and instructions to run it, read the [documentation for fast-stats](https://gitlab.com/gitlab-com/support/toolbox/fast-stats#usage). ## Find relevant log entries with a correlation ID Most requests have a log ID that can be used to [find relevant log entries](tracing_correlation_id.md).