Enable Percona Distribution for PostgreSQL extensions

Some extensions require additional configuration before using them with Percona Distribution for PostgreSQL. This sections provides configuration instructions per extension.

Patroni

Patroni is the third-party high availability solution for PostgreSQL. The High Availability in PostgreSQL with Patroni chapter provides details about the solution overview and architecture deployment.

While setting up a high availability PostgreSQL cluster with Patroni, you will need the following components:

• Patroni installed on every postresql node.

• Distributed Configuration Store (DCS). Patroni supports such DCSs as ETCD, zookeeper, Kubernetes though ETCD is the most popular one. It is available upstream as DEB packages for Debian 10, 11 and Ubuntu 18.04, 20.04, 22.04.

  For CentOS 8, RPM packages for ETCD is available within Percona Distribution for PostreSQL. You can install it using the following command:

  $ sudo yum install etcd python3-python-etcd
  

• HAProxy.

See the configuration guidelines for Debian and Ubuntu and RHEL and CentOS.

See also

• Patroni documentation

• Percona Blog:

  • PostgreSQL HA with Patroni: Your Turn to Test Failure Scenarios

pgBadger

Enable the following options in postgresql.conf configuration file before starting the service:

log_min_duration_statement = 0
log_line_prefix = '%t [%p]: '
log_checkpoints = on
log_connections = on
log_disconnections = on
log_lock_waits = on
log_temp_files = 0
log_autovacuum_min_duration = 0
log_error_verbosity = default

For details about each option, see pdBadger documentation.

pgAudit set-user

Add the set-user to shared_preload_libraries in postgresql.conf. The recommended way is to use the ALTER SYSTEM command. Connect to psql and use the following command:

ALTER SYSTEM SET shared_preload_libraries = 'set-user';

Start / restart the server to apply the configuration.

You can fine-tune user behavior with the custom parameters supplied with the extension.

wal2json

After the installation, enable the following option in postgresql.conf configuration file before starting the service:

wal_level = logical

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