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Automatic merge from submit-queue (batch tested with PRs 40549, 40339) Invalid node names when deploying with Heat OpenStack Heat templates create Kubernetes nodes with invalid hostnames. Capital letters are not allowed in the hostnames: Unable to register node "kubernetes-node-6s8OizYe" with API server: Node "kubernetes-node-6s8OizYe" is invalid: metadata.name: Invalid value: "kubernetes-node-6s8OizYe": must match the regex [a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)* (e.g. 'example.com') This patch prevents Heat generating hostnames that contain capital letters. **What this PR does / why we need it**: **Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes # **Special notes for your reviewer**: **Release note**: ```release-note ```