Merge branch 'docs-repo-merge-17-admin-monitoring' into 'master'

Docs: Merge EE doc/administration/monitoring to CE

See merge request gitlab-org/gitlab-ce!27784

doc/administration/monitoring/prometheus/gitlab_metrics.md

@@ -48,6 +48,47 @@ The following metrics are available:
 | unicorn_active_connections        | Gauge | 11.0 | The number of active Unicorn connections (workers) |
 | unicorn_queued_connections        | Gauge | 11.0 | The number of queued Unicorn connections |
 
+## Sidekiq Metrics available for Geo **[PREMIUM]**
+
+Sidekiq jobs may also gather metrics, and these metrics can be accessed if the Sidekiq exporter is enabled (e.g. via
+the `monitoring.sidekiq_exporter` configuration option in `gitlab.yml`.
+
+| Metric                                       | Type    | Since | Description | Labels |
+|:-------------------------------------------- |:------- |:----- |:----------- |:------ |
+| geo_db_replication_lag_seconds               | Gauge   | 10.2  | Database replication lag (seconds) | url
+| geo_repositories                             | Gauge   | 10.2  | Total number of repositories available on primary | url
+| geo_repositories_synced                      | Gauge   | 10.2  | Number of repositories synced on secondary | url
+| geo_repositories_failed                      | Gauge   | 10.2  | Number of repositories failed to sync on secondary | url
+| geo_lfs_objects                              | Gauge   | 10.2  | Total number of LFS objects available on primary | url
+| geo_lfs_objects_synced                       | Gauge   | 10.2  | Number of LFS objects synced on secondary | url
+| geo_lfs_objects_failed                       | Gauge   | 10.2  | Number of LFS objects failed to sync on secondary | url
+| geo_attachments                              | Gauge   | 10.2  | Total number of file attachments available on primary | url
+| geo_attachments_synced                       | Gauge   | 10.2  | Number of attachments synced on secondary | url
+| geo_attachments_failed                       | Gauge   | 10.2  | Number of attachments failed to sync on secondary | url
+| geo_last_event_id                            | Gauge   | 10.2  | Database ID of the latest event log entry on the primary | url
+| geo_last_event_timestamp                     | Gauge   | 10.2  | UNIX timestamp of the latest event log entry on the primary | url
+| geo_cursor_last_event_id                     | Gauge   | 10.2  | Last database ID of the event log processed by the secondary | url
+| geo_cursor_last_event_timestamp              | Gauge   | 10.2  | Last UNIX timestamp of the event log processed by the secondary | url
+| geo_status_failed_total                      | Counter | 10.2  | Number of times retrieving the status from the Geo Node failed | url
+| geo_last_successful_status_check_timestamp   | Gauge   | 10.2  | Last timestamp when the status was successfully updated | url
+| geo_lfs_objects_synced_missing_on_primary    | Gauge   | 10.7  | Number of LFS objects marked as synced due to the file missing on the primary | url
+| geo_job_artifacts_synced_missing_on_primary  | Gauge   | 10.7  | Number of job artifacts marked as synced due to the file missing on the primary | url
+| geo_attachments_synced_missing_on_primary    | Gauge   | 10.7  | Number of attachments marked as synced due to the file missing on the primary | url
+| geo_repositories_checksummed_count           | Gauge   | 10.7  | Number of repositories checksummed on primary | url
+| geo_repositories_checksum_failed_count       | Gauge   | 10.7  | Number of repositories failed to calculate the checksum on primary | url
+| geo_wikis_checksummed_count                  | Gauge   | 10.7  | Number of wikis checksummed on primary | url
+| geo_wikis_checksum_failed_count              | Gauge   | 10.7  | Number of wikis failed to calculate the checksum on primary | url
+| geo_repositories_verified_count              | Gauge   | 10.7  | Number of repositories verified on secondary | url
+| geo_repositories_verification_failed_count   | Gauge   | 10.7  | Number of repositories failed to verify on secondary | url
+| geo_repositories_checksum_mismatch_count     | Gauge   | 10.7  | Number of repositories that checksum mismatch on secondary | url
+| geo_wikis_verified_count                     | Gauge   | 10.7  | Number of wikis verified on secondary | url
+| geo_wikis_verification_failed_count          | Gauge   | 10.7  | Number of wikis failed to verify on secondary | url
+| geo_wikis_checksum_mismatch_count            | Gauge   | 10.7  | Number of wikis that checksum mismatch on secondary | url
+| geo_repositories_checked_count               | Gauge   | 11.1  | Number of repositories that have been checked via `git fsck` | url
+| geo_repositories_checked_failed_count        | Gauge   | 11.1  | Number of repositories that have a failure from `git fsck` | url
+| geo_repositories_retrying_verification_count  | Gauge   | 11.2  | Number of repositories verification failures that Geo is actively trying to correct on secondary  | url
+| geo_wikis_retrying_verification_count         | Gauge   | 11.2  | Number of wikis verification failures that Geo is actively trying to correct on secondary | url
+
 ### Ruby metrics
 
 Some basic Ruby runtime metrics are available:

doc/administration/monitoring/prometheus/index.md

@@ -217,6 +217,12 @@ The Postgres exporter allows you to measure various PostgreSQL metrics.
 
 [➔ Read more about the Postgres exporter.](postgres_exporter.md)
 
+### PgBouncer exporter
+
+The PgBouncer exporter allows you to measure various PgBouncer metrics.
+
+[➔ Read more about the PgBouncer exporter.](pgbouncer_exporter.md)
+
 ### GitLab monitor exporter
 
 The GitLab monitor exporter allows you to measure various GitLab metrics, pulled from Redis and the database.

doc/administration/monitoring/prometheus/pgbouncer_exporter.md

+# PgBouncer exporter
+
+>**Note:**
+Available since [Omnibus GitLab 11.0][2493]. For installations from source
+you'll have to install and configure it yourself.
+
+The [PgBouncer exporter] allows you to measure various PgBouncer metrics.
+
+To enable the PgBouncer exporter:
+
+1. [Enable Prometheus](index.md#configuring-prometheus)
+1. Edit `/etc/gitlab/gitlab.rb`
+1. Add or find and uncomment the following line, making sure it's set to `true`:
+
+    ```ruby
+    pgbouncer_exporter['enable'] = true
+    ```
+
+1. Save the file and [reconfigure GitLab][reconfigure] for the changes to
+   take effect.
+
+Prometheus will now automatically begin collecting performance data from
+the PgBouncer exporter exposed under `localhost:9188`.
+
+The PgBouncer exporter will also be enabled by default if the [pgbouncer_role][postgres roles]
+is enabled.
+
+[← Back to the main Prometheus page](index.md)
+
+[2493]: https://gitlab.com/gitlab-org/omnibus-gitlab/merge_requests/2493
+[PgBouncer exporter]: https://github.com/stanhu/pgbouncer_exporter
+[postgres roles]: https://docs.gitlab.com/omnibus/roles/#postgres-roles
+[prometheus]: https://prometheus.io
+[reconfigure]: ../../restart_gitlab.md#omnibus-gitlab-reconfigure