The valid cluster name format for ROSA clusters

Solution Verified - Updated -

Environment

  • Red Hat OpenShift Service on AWS

Issue

  • You want to create your ROSA cluster with uppercase or partial uppercase name. Is it possible ?

Resolution

  • No, the ROSA cluster name must be no more than 15 lowercase alphanumeric characters or '-'. And start with a letter, and end with an alphanumeric character.
  • This format rule is basically based on DNS-1035 label.

Root Cause

  • It's a kind of specification of ROSA cluster.

Diagnostic Steps

  • You can see the following error messages when creating your cluster with cluster name including any uppercase character.
$ rosa create cluster -c TEST-rosa
E: Cluster name must consist of no more than 15 lowercase alphanumeric characters or '-', start with a letter, and end with an alphanumeric character.

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