--- stage: Monitor group: APM 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/#designated-technical-writers --- # Log system 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. Find more about them [in Audit Events documentation](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. ## `production_json.log` This file lives in `/var/log/gitlab/gitlab-rails/production_json.log` for Omnibus GitLab packages or in `/home/git/gitlab/log/production_json.log` for installations from source. When GitLab is running in an environment other than production, the corresponding log file is shown here. It contains a structured log for Rails controller requests received from GitLab, thanks to [Lograge](https://github.com/roidrage/lograge/). Note that requests from the API are logged to a separate file in `api_json.log`. Each line contains a JSON line that can be ingested by services like Elasticsearch and Splunk. Line breaks have been added to this example 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 } ``` This example was a GET request for a specific issue. Each line also contains performance data, with times in seconds: 1. `duration_s`: total time taken to retrieve the request 1. `queue_duration_s`: total time that the request was queued inside GitLab Workhorse 1. `view_duration_s`: total time taken inside the Rails views 1. `db_duration_s`: total time to retrieve data from PostgreSQL 1. `redis_duration_s`: total time to retrieve data from Redis 1. `cpu_s`: total time spent on CPU 1. `gitaly_duration_s`: total time taken by Gitaly calls 1. `gitaly_calls`: total number of calls made to Gitaly 1. `redis_calls`: total number of calls made to Redis 1. `redis_read_bytes`: total bytes read from Redis 1. `redis_write_bytes`: total bytes written to Redis User clone and fetch activity using HTTP transport appears in this 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 Global Search](../user/search/advanced_global_search.md). These will additionally log `elasticsearch_calls` and `elasticsearch_call_duration_s`, which correspond to: 1. `elasticsearch_calls`: total number of calls to Elasticsearch 1. `elasticsearch_duration_s`: total time taken by Elasticsearch calls ActionCable connection and subscription events are also logged to this file and they follow the same format above. 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":{}, "path":{}, "format":{}, "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: **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 "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` This file lives in `/var/log/gitlab/gitlab-rails/production.log` for Omnibus GitLab packages or in `/home/git/gitlab/log/production.log` for installations from source. (When GitLab is running in an environment other than production, the corresponding log file is shown here.) 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` > Introduced in GitLab 10.0. This file lives in `/var/log/gitlab/gitlab-rails/api_json.log` for Omnibus GitLab packages, or in `/home/git/gitlab/log/api_json.log` for installations from source. 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 } ``` This entry shows an access to an internal endpoint to check whether an associated SSH key can download the project in question via a `git fetch` or `git clone`. In this example, we see: 1. `duration`: total time in milliseconds taken to retrieve the request 1. `queue_duration`: total time in milliseconds that the request was queued inside GitLab Workhorse 1. `method`: The HTTP method used to make the request 1. `path`: The relative path of the query 1. `params`: Key-value pairs passed in a query string or HTTP body. Sensitive parameters (such as passwords and tokens) are filtered out. 1. `ua`: The User-Agent of the requester ## `application.log` This file lives in `/var/log/gitlab/gitlab-rails/application.log` for Omnibus GitLab packages or in `/home/git/gitlab/log/application.log` for installations from source. It helps you discover events happening in your instance such as user creation, project removing and so on. 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. This file lives in `/var/log/gitlab/gitlab-rails/application_json.log` for Omnibus GitLab packages or in `/home/git/gitlab/log/application_json.log` for installations from source. It contains the JSON version of the logs in `application.log` like the example below: ``` 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` This file lives in `/var/log/gitlab/gitlab-rails/integrations_json.log` for Omnibus GitLab packages or in `/home/git/gitlab/log/integrations_json.log` for installations from source. It contains information about [integrations](../user/project/integrations/overview.md) activities such as Jira, Asana, and Irker services. It uses JSON format like the example below: ```json { "severity":"ERROR", "time":"2018-09-06T14:56:20.439Z", "service_class":"JiraService", "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":"JiraService", "project_id":3, "project_path":"namespace2/project2", "message":"Successfully posted", "client_url":"http://jira.example.com" } ``` ## `kubernetes.log` > Introduced in GitLab 11.6. This file lives in `/var/log/gitlab/gitlab-rails/kubernetes.log` for Omnibus GitLab packages or in `/home/git/gitlab/log/kubernetes.log` for installations from source. It logs information related to the Kubernetes Integration including errors during installing cluster applications on your GitLab managed Kubernetes clusters. Each line contains a JSON line 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` This file lives in `/var/log/gitlab/gitlab-rails/git_json.log` for Omnibus GitLab packages or in `/home/git/gitlab/log/git_json.log` for installations from source. NOTE: **Note:** After 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, and in this case you will know what exactly happened. This log file contains all failed requests from GitLab to Git repositories. In the majority of cases this file will be 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` NOTE: **Note:** Most log entries only exist in [GitLab Starter](https://about.gitlab.com/pricing/), however a few exist in GitLab Core. This file lives in `/var/log/gitlab/gitlab-rails/audit_json.log` for Omnibus GitLab packages or in `/home/git/gitlab/log/audit_json.log` for installations from source. Changes to group or project settings 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 For Omnibus installations, some Sidekiq logs reside in `/var/log/gitlab/sidekiq/current` and as follows. ### `sidekiq.log` This file lives in `/var/log/gitlab/gitlab-rails/sidekiq.log` for Omnibus GitLab packages or in `/home/git/gitlab/log/sidekiq.log` for installations from source. 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 format above, 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, "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 source installations, 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. This file lives in `/var/log/gitlab/gitlab-rails/sidekiq_client.log` for Omnibus GitLab packages or in `/home/git/gitlab/log/sidekiq_client.log` for installations from source. This file contains logging information about jobs before they are start being processed by Sidekiq, for example before being enqueued. This log file follows the same structure as [`sidekiq.log`](#sidekiqlog), so it will be 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 For GitLab version 12.10 and later, there are 2 `gitlab-shell.log` files. Information containing `git-{upload-pack,receive-pack}` requests lives in `/var/log/gitlab/gitlab-shell/gitlab-shell.log`. Information about hooks to GitLab Shell from Gitaly lives in `/var/log/gitlab/gitaly/gitlab-shell.log`. 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/gitlab-shell.log`: ```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, this file lives in `/var/log/gitlab/gitaly/gitlab-shell.log` for Omnibus GitLab packages or in `/home/git/gitaly/gitlab-shell.log` for installations from source. 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 lives in `/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 : worker (pid: 9094) exceeds memory limit (320626688 bytes > 247066940 bytes) W, [2015-02-13T07:16:01.313000 #9094] WARN -- : Unicorn::WorkerKiller send SIGQUIT (pid: 9094) alive: 3621 sec (trial 1) I, [2015-02-13T07:16:01.530733 #9047] INFO -- : reaped # worker=1 I, [2015-02-13T07:16:01.534501 #13379] INFO -- : worker=1 spawned pid=13379 I, [2015-02-13T07:16:01.534848 #13379] INFO -- : worker=1 ready ``` ## `repocheck.log` This file lives in `/var/log/gitlab/gitlab-rails/repocheck.log` for Omnibus GitLab packages or in `/home/git/gitlab/log/repocheck.log` for installations from source. It logs information whenever a [repository check is run](repository_checks.md) on a project. ## `importer.log` > Introduced in GitLab 11.3. This file lives in `/var/log/gitlab/gitlab-rails/importer.log` for Omnibus GitLab packages or in `/home/git/gitlab/log/importer.log` for installations from source. It logs the progress of the import process. ## `exporter.log` > Introduced in GitLab 13.1. This file lives in `/var/log/gitlab/gitlab-rails/exporter.log` for Omnibus GitLab packages or in `/home/git/gitlab/log/exporter.log` for installations from source. It logs the progress of the export process. ## `auth.log` > Introduced in GitLab 12.0. This file lives in `/var/log/gitlab/gitlab-rails/auth.log` for Omnibus GitLab packages or in `/home/git/gitlab/log/auth.log` for installations from source. This log records: - Information whenever [Rack Attack](../security/rack_attack.md) registers an abusive request. - 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. NOTE: **Note:** From [%12.3](https://gitlab.com/gitlab-org/gitlab/-/issues/29239), user ID and username are also recorded on this log, if available. ## `graphql_json.log` > [Introduced](https://gitlab.com/gitlab-org/gitlab-foss/-/issues/59587) in GitLab 12.0. This file lives in `/var/log/gitlab/gitlab-rails/graphql_json.log` for Omnibus GitLab packages or in `/home/git/gitlab/log/graphql_json.log` for installations from source. GraphQL queries are recorded in that 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. This file lives in `/var/log/gitlab/gitlab-rails/migrations.log` for Omnibus GitLab packages or in `/home/git/gitlab/log/migrations.log` for installations from source. ## `mail_room_json.log` (default) > [Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/19186) in GitLab 12.6. This file lives in `/var/log/gitlab/mailroom/mail_room_json.log` for Omnibus GitLab packages or in `/home/git/gitlab/log/mail_room_json.log` for installations from source. 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 live 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 will start a Web server and listen to the defined port (default: `8082`). Access logs will be generated in `/var/log/gitlab/gitlab-rails/sidekiq_exporter.log` for Omnibus GitLab packages or in `/home/git/gitlab/log/sidekiq_exporter.log` for installations from source. If Prometheus metrics and the Web Exporter are both enabled, Puma/Unicorn will start a Web server and listen to the defined port (default: `8083`). Access logs will be generated in `/var/log/gitlab/gitlab-rails/web_exporter.log` for Omnibus GitLab packages or in `/home/git/gitlab/log/web_exporter.log` for installations from source. ## `database_load_balancing.log` **(PREMIUM ONLY)** > [Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/15442) in GitLab 12.3. Contains details of GitLab's [Database Load Balancing](database_load_balancing.md). It's stored at: - `/var/log/gitlab/gitlab-rails/database_load_balancing.log` for Omnibus GitLab packages. - `/home/git/gitlab/log/database_load_balancing.log` for installations from source. ## `elasticsearch.log` **(STARTER ONLY)** > Introduced in GitLab 12.6. This file lives in `/var/log/gitlab/gitlab-rails/elasticsearch.log` for Omnibus GitLab packages or in `/home/git/gitlab/log/elasticsearch.log` for installations from source. It logs information related to the Elasticsearch Integration including errors during indexing or searching Elasticsearch. Each line contains a JSON line 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 lives in `/var/log/gitlab/gitlab-rails/exceptions_json.log` for Omnibus GitLab packages or in `/home/git/gitlab/log/exceptions_json.log` for installations from source. It 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). Each line contains a JSON line 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. This file lives in `/var/log/gitlab/gitlab-rails/service_measurement.log` for Omnibus GitLab packages or in `/home/git/gitlab/log/service_measurement.log` for installations from source. It contain only a single structured log with measurements for each service execution. It will contain measurement such as: number of sql calls, execution_time, gc_stats, memory usage, etc... 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 ONLY)** > Introduced in 9.5. Geo stores structured log messages in a `geo.log` file. For Omnibus 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`. ## Registry Logs For Omnibus installations, Container Registry logs reside in `/var/log/gitlab/registry/current`. ## NGINX Logs For Omnibus installations, NGINX logs reside in: - `/var/log/gitlab/nginx/gitlab_access.log` contains a log of requests made to GitLab. - `/var/log/gitlab/nginx/gitlab_error.log` contains a log of NGINX errors for GitLab. - `/var/log/gitlab/nginx/gitlab_pages_access.log` contains a log of requests made to Pages static sites. - `/var/log/gitlab/nginx/gitlab_pages_error.log` contains a log of NGINX errors for Pages static sites. - `/var/log/gitlab/nginx/gitlab_registry_access.log` contains a log of requests made to the Container Registry. - `/var/log/gitlab/nginx/gitlab_registry_error.log` contains a log of NGINX errors for the Container Registry. - `/var/log/gitlab/nginx/gitlab_mattermost_access.log` contains a log of requests made to Mattermost. - `/var/log/gitlab/nginx/gitlab_mattermost_error.log` contains 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 installations, Pages logs reside 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 } ``` ## Workhorse Logs For Omnibus installations, Workhorse logs reside in `/var/log/gitlab/gitlab-workhorse/current`. ## PostgreSQL Logs For Omnibus installations, PostgreSQL logs reside in `/var/log/gitlab/postgresql/current`. ## Prometheus Logs For Omnibus installations, Prometheus logs reside in `/var/log/gitlab/prometheus/current`. ## Redis Logs For Omnibus installations, Redis logs reside in `/var/log/gitlab/redis/current`. ## Mattermost Logs For Omnibus installations, Mattermost logs reside in `/var/log/gitlab/mattermost/mattermost.log`.