Registry Mirror Authentication in Kubernetes Without Breaking Tenant Isolation
I spent most of last week chasing image pull failures in a multi-tenant cluster. It turned out the problem was our private registry mirror. We were using it as a pull-through cache, but the credentials lived on the nodes. One team rotated their credentials and, a few minutes later, pods in three other namespaces started failing too. That was the moment it became obvious we had a shared-credentials problem. That sent me down the rabbit hole of CRI-O’s credential provider for registry mirrors. After setting it up, I do not really want to go back. ...