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diff --git a/doc/administration/logs.md b/doc/administration/logs.md index 4b8d5c5cc87..76e071dc673 100644 --- a/doc/administration/logs.md +++ b/doc/administration/logs.md @@ -9,6 +9,33 @@ documentation](http://docs.gitlab.com/ee/administration/audit_events.html) 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 logfile 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 not yet logged to this +file](https://gitlab.com/gitlab-org/gitlab-ce/issues/36189). + +Each line contains a JSON line that can be ingested by Elasticsearch, Splunk, etc. For example: + +```json +{"method":"GET","path":"/gitlab/gitlab-ce/issues/1234","format":"html","controller":"Projects::IssuesController","action":"show","status":200,"duration":229.03,"view":174.07,"db":13.24,"time":"2017-08-08T20:15:54.821Z","params":{"namespace_id":"gitlab","project_id":"gitlab-ce","id":"1234"},"remote_ip":"18.245.0.1","user_id":1,"username":"admin"} +``` + +In this example, you can see this was a GET request for a specific issue. Notice each line also contains performance data: + +1. `duration`: the total time taken to retrieve the request +2. `view`: total time taken inside the Rails views +3. `db`: total time to retrieve data from the database + +In addition, the log contains the IP address from which the request originated +(`remote_ip`) as well as the user's ID (`user_id`), and username (`username`). + ## `production.log` This file lives in `/var/log/gitlab/gitlab-rails/production.log` for |