System requirements

The following are the minimum software and hardware requirements to run Charmed MySQL on Kubernetes.

Summary

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

Software

• Ubuntu 22.04 (Jammy) or later
• Kubernetes 1.27+
• Canonical MicroK8s 1.27+ (snap channel 1.27-strict/stable and newer)

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 K8s.

Juju major release	Supported minor versions	Compatible charm revisions	Comment
	3.6.1+	213+
	3.5.2+	153+
	3.4.3+	153+	Known issues with 3.4.2: bug #1, bug #2
	3.1.6+	99+
	2.9.32+	75 +

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 K8s 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 ROCK OCI, which is recursively based on the charmed-mysql snap. It currently supports:

• amd64
• arm64 (from revision 180+)

Contact us if you are interested in a new architecture!

Networking

• Access to the internet for downloading the required OCI/ROCKs and charms.
• 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!