PostgreSQL

  • By Data Platform
Channel Version Revision Published Runs on
latest/stable 4 4 13 Jun 2022
Ubuntu 20.04
latest/edge 9 9 Yesterday
Ubuntu 20.04
juju deploy postgresql-k8s
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Platform:

PostgreSQL Operator

Description

Charm for Juju to deploy and manage PostgreSQL in a Kubernetes environment. Multiple units will provision a single master and remaining units as hot standby servers. Automatic failover will occur if a database goes down and there are enough remaining units for form a quorum, managed by repmgrd.

Usage

Provision a Juju environment and a k8s model on Juju 2.9-rc12 or later, per Juju documentation. Then to deploy 3 units (pods) using the default image, simply:

juju deploy -n3 postgresql-k8s

Client charms needing to connect with PostgreSQL should use the ops-lib-pgsql library to manage the relation.

Scale Out Usage

To horizontally scale, adding more read-only standbys:

juju add-unit postgresql-k8s

Note that this charm provides standard PostgreSQL, with a single read/write master node. Adding more nodes can only provide extra read-only capacity, and only to clients making use of the hot standby connection details (which will be load balanced over all available hot standby databases).


Testing

Just run make test.


For more details, see here.