etcd backup fails with "error: the following arguments are required: cron_job_name"

Problem

• etcd backup fails with below error:

Environment

• Platform9 Managed Kubernetes - 5.6

Cause

• $cronjobname argument was not needed before v1.22.

Resolution

• As a workaround remove $cronjobname argument.

Additional Information

• This issue has been discussed internally with engineering team and fixed with kubernetes version 1.23.