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---
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stage: Data Stores
group: Database
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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
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---
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# PostgreSQL Server Exporter **(FREE SELF)**
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The [PostgreSQL Server Exporter ](https://github.com/prometheus-community/postgres_exporter ) allows you to export various PostgreSQL metrics.
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For installations from source you must install and configure it yourself.
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To enable the PostgreSQL Server Exporter:
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1. [Enable Prometheus ](index.md#configuring-prometheus ).
1. Edit `/etc/gitlab/gitlab.rb` and enable `postgres_exporter` :
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```ruby
postgres_exporter['enable'] = true
```
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If PostgreSQL Server Exporter is configured on a separate node, make sure that the local
address is [listed in `trust_auth_cidr_addresses` ](../../postgresql/replication_and_failover.md#network-information ) or the
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exporter can't connect to the database.
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1. Save the file and [reconfigure GitLab ](../../restart_gitlab.md#omnibus-gitlab-reconfigure ) for the changes to
take effect.
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Prometheus begins collecting performance data from
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the PostgreSQL Server Exporter exposed under `localhost:9187` .
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## Advanced configuration
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In most cases, PostgreSQL Server Exporter works with the defaults and you should not
need to change anything. To further customize the PostgreSQL Server Exporter,
use the following configuration options:
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1. Edit `/etc/gitlab/gitlab.rb` :
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```ruby
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# The name of the database to connect to.
postgres_exporter['dbname'] = 'pgbouncer'
# The user to sign in as.
postgres_exporter['user'] = 'gitlab-psql'
# The user's password.
postgres_exporter['password'] = ''
# The host to connect to. Values that start with '/' are for unix domain sockets
# (default is 'localhost').
postgres_exporter['host'] = 'localhost'
# The port to bind to (default is '5432').
postgres_exporter['port'] = 5432
# Whether or not to use SSL. Valid options are:
# 'disable' (no SSL),
# 'require' (always use SSL and skip verification, this is the default value),
# 'verify-ca' (always use SSL and verify that the certificate presented by
# the server was signed by a trusted CA),
# 'verify-full' (always use SSL and verify that the certification presented
# by the server was signed by a trusted CA and the server host name matches
# the one in the certificate).
postgres_exporter['sslmode'] = 'require'
# An application_name to fall back to if one isn't provided.
postgres_exporter['fallback_application_name'] = ''
# Maximum wait for connection, in seconds. Zero or not specified means wait indefinitely.
postgres_exporter['connect_timeout'] = ''
# Cert file location. The file must contain PEM encoded data.
postgres_exporter['sslcert'] = 'ssl.crt'
# Key file location. The file must contain PEM encoded data.
postgres_exporter['sslkey'] = 'ssl.key'
# The location of the root certificate file. The file must contain PEM encoded data.
postgres_exporter['sslrootcert'] = 'ssl-root.crt'
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```
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1. Save the file and [reconfigure GitLab ](../../restart_gitlab.md#omnibus-gitlab-reconfigure )
for the changes to take effect.
