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cybozu-go / moco

MySQL operator on Kubernetes using GTID-based semi-synchronous replication.

Home Page:https://cybozu-go.github.io/moco/

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Change naming rule of Cronjob in order to extend name length limitation of MySQLCluster

YZ775 opened this issue · comments

commented

What

In the current version, the name length of MySQLCluster is limited to 40 characters because the name length of CronJob/StatefulSet is limited to 52 characters by Kubernetes.

40 characters are short in some cases. For example, large clusters and multi-tenant Kubernetes cluster.
So we want to extend the length.

How

Ideas

  • Change names of CronJob to moco-backup-<some random name> from moco-backup-<Cluster name>
  • Shorten the prefix moco-backup

Limitation

  • Even if the limitation of CronJob is solved by the effort above, there are still limitations by StatefulSet.
  • The prefix of StatefulSet moco- is enough short. so it's hard to extend the limitation of MySQLCluster name to over 47 characters.

Checklist

  • Finish implementation of the issue
  • Test all functions
  • Have enough logs to trace activities
  • Notify developers of necessary actions
commented

We decided that we don't start implementation of this issue for now because it's merit is smaller than it's cost.