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How to set up registry in a multi-host microk8s cluster?

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I used microk8s to set up a kubernetes cluster with three virtualbox machines in it. Everything seems to be fine, but the microk8s registry does not seem to work anymore. It used to work on a single machine, but I am not sure if it is meant to work for a multi-host cluster. Anyways, below is what happened (under Ubuntu 22.04 LTS, with microk8s installed by sudo snap install microk8s --classic --channel=1.27):

Initially microk8s status shows that the registry is disabled:

$ microk8s status microk8s is runninghigh-availability: yes  datastore master nodes: 192.168.10.30:19001 192.168.10.31:19001 192.168.10.32:19001  datastore standby nodes: noneaddons:  enabled:    dns                  # (core) CoreDNS    ha-cluster           # (core) Configure high availability on the current node    helm                 # (core) Helm - the package manager for Kubernetes    helm3                # (core) Helm 3 - the package manager for Kubernetes    hostpath-storage     # (core) Storage class; allocates storage from host directory    storage              # (core) Alias to hostpath-storage add-on, deprecated  disabled:    cert-manager         # (core) Cloud native certificate management    community            # (core) The community addons repository    dashboard            # (core) The Kubernetes dashboard    gpu                  # (core) Automatic enablement of Nvidia CUDA    host-access          # (core) Allow Pods connecting to Host services smoothly    ingress              # (core) Ingress controller for external access    kube-ovn             # (core) An advanced network fabric for Kubernetes    mayastor             # (core) OpenEBS MayaStor    metallb              # (core) Loadbalancer for your Kubernetes cluster    metrics-server       # (core) K8s Metrics Server for API access to service metrics    minio                # (core) MinIO object storage    observability        # (core) A lightweight observability stack for logs, traces and metrics    prometheus           # (core) Prometheus operator for monitoring and logging    rbac                 # (core) Role-Based Access Control for authorisation    registry             # (core) Private image registry exposed on localhost:32000

But when I use microk8s to enable it, there is an error:

$ microk8s enable registryInfer repository core for addon registry                                        Infer repository core for addon hostpath-storage                                Addon core/hostpath-storage is already enabled                                  The registry will be created with the size of 20Gi.                             Default storage class will be used.                                             Warning: Detected changes to resource container-registry which is currently being deleted.namespace/container-registry unchangedWarning: Detected changes to resource registry-claim which is currently being deleted.persistentvolumeclaim/registry-claim unchangedconfigmap/local-registry-hosting unchangedError from server (Forbidden): error when creating "STDIN": deployments.apps "registry" is forbidden: unable to create new content in namespace container-registry because it is being terminatedError from server (Forbidden): error when creating "STDIN": services "registry" is forbidden: unable to create new content in namespace container-registry because it is being terminated

microk8s disable registry seems to work fine, but re-enabling registry gives the same error:

$ microk8s disable registryInfer repository core for addon registryAddon core/registry is already disabled

My questions are:

Is the built-in microk8s registry supposed to work in a multi-host cluster?

If not, how to set up an image registry in a multi-host microk8s cluster?


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