Renaming a k3s node is not a cosmetic change
I renamed four nodes because the old domain annoyed me. The cluster stayed green for weeks while sitting one reboot away from losing every worker.
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kubernetes
A name should say what something is, not where it runs
I counted seven naming shapes on my own network for the same kind of thing, and one of the suffixes meant two different backends depending on which name you picked.
Kubernetes registry credentials that expire on their own
A GitLab deploy token in an imagePullSecret is a long-lived credential sitting in a namespace, and it does not have to be.