MySQL Router K8s How-to | Upgrade

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Upgrade

In-place upgrades/rollbacks are not possible for major versions.

Due to a bug in mysql-router-k8s charm, refreshing from revision prior to 814 to newer revision cannot happen in a rolling fashion, causing some downtime. All units will be refreshed at once and the resume step is skipped.

Technical details can be found in the Pull Request #106.

For instructions on carrying out minor version upgrades, see the following guides:

  • Minor upgrade, e.g. MySQL Router 8.0.33 → MySQL Router 8.0.34
    (including charm revision bump 99 → 102).
  • Minor rollback, e.g. MySQL Router 8.0.34 → MySQL Router 8.0.33
    (including charm revision return 102 → 99).