System requirements

The following are the minimum software and hardware requirements to run Charmed PostgreSQL on IAAS/VM.

Summary

• Software
  • Juju
  • MySQL Group replication requirements
• Hardware
• Networking

Software

• Ubuntu 22.04 (Jammy) or later

Juju

The charm supports several Juju releases from 2.9 LTS onwards. The table below shows which minor versions of each major Juju release are supported by the stable Charmhub releases of MySQL.

Always check the charm release notes to find the minimum Juju version for your deployment.

Juju major release	Supported minor versions	Compatible charm revisions	Comment
	3.6.1+	325+
	3.5.2+	240+
	3.4.3+	240+	Known issues with 3.4.2: bug #1, bug #2
	3.1.6+	196+
	2.9.32+	151+

See the guide How to upgrade Juju for a new database revision.

MySQL Group replication requirements

• In order to integrate with this charm, every table created by the integrated application must have a primary key. This is required by the group replication plugin enabled in this charm.
• The count of Charmed MySQL units in a single Juju application is limited to 9. Unit 10+ will start; however, they will not join the cluster but sleep in a hot-swap reserve.

Hardware

Make sure your machine meets the following requirements:

• 8GB of RAM.
• 2 CPU threads.
• At least 20GB of available storage.

The charm is based on the charmed-mysql snap. It currently supports:

• amd64
• arm64 (from revision 274+)

Contact us if you are interested in new architecture!

Networking

• Access to the internet for downloading the required snaps and charms.
  • For air-gapped environments, see our offline deployment guide
• Only IPv4 is supported at the moment
  • See more information about this limitation in this Jira issue
  • Contact us if you are interested in IPv6!