Charmed PostgreSQL VM

Channel Revision Published Runs on
latest/stable 345 09 Nov 2023
Ubuntu 22.04 Ubuntu 20.04 Ubuntu 18.04 Ubuntu 16.04
14/stable 363 21 Feb 2024
Ubuntu 22.04
14/candidate 363 31 Jan 2024
Ubuntu 22.04
14/beta 368 21 Feb 2024
Ubuntu 22.04
14/edge 396 16 Apr 2024
Ubuntu 22.04
juju deploy postgresql --channel 14/stable
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Platform:

Ubuntu
22.04

How to enable plugins/extensions

Note: This feature is currently only available in the channel 14/edge (revision 304+) and will be released to the channel 14/stable soon.

Prerequisites

Enable plugin/extension

Enable the plugin/extension by setting True as the value of its respective config option, like in the following example:

juju config postgresql plugin_<plugin name>_enable=True

Integrate your application

Integrate (formerly known as “relate” in juju v.2.9) your application charm with the PostgreSQL charm:

juju integrate <application charm> postgresql 

If your application charm requests extensions through db or db-admin relation data, but the extension is not enabled yet, you’ll see that the PostgreSQL application goes into a blocked state with the following message:

postgresql/0*  blocked   idle   10.1.123.30            extensions requested through relation

In the Juju debug logs we can see the list of extensions that need to be enabled:

unit-postgresql-0: 18:04:51 ERROR unit.postgresql/0.juju-log db:5: ERROR - `extensions` (pg_trgm, unaccent) cannot be requested through relations - Please enable extensions through `juju config` and add the relation again.

After enabling the needed extensions through the config options, the charm will unblock. If you have removed the relation, you can add it back again.

If the application charm uses the new postgresql_client interface, it can use the is_postgresql_plugin_enabled helper method from the data interfaces library to check whether the plugin/extension is already enabled in the database.

Note: Not all PostgreSQL extensions are available. The list of supported extensions is available at Supported plugins/extensions.


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