Installed keycloak by helm
$ helm install codecentric/keycloak
$ helm install keycloak codecentric/keycloakCheck pod status on kubernetes
$ kubectl get pods
NAME READY STATUS RESTARTS AGE
keycloak-0 0/1 ImagePullBackOff 0 52sCheck detailed events
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled <unknown> default-scheduler Successfully assigned default/keycloak-0 to node3
Warning Failed 24s kubelet, node3 Failed to pull image "jboss/keycloak:9.0.2": rpc error: code = Unknown desc = failed to pull and unpack image "docker.io/jboss/keycloak:9.0.2": failed to resolve reference "docker.io/jboss/keycloak:9.0.2": failed to do request: Head https://registry-1.docker.io/v2/jboss/keycloak/manifests/9.0.2: dial tcp 52.55.198.220:443: i/o timeout
Warning Failed 24s kubelet, node3 Error: ErrImagePull
Normal BackOff 23s kubelet, node3 Back-off pulling image "jboss/keycloak:9.0.2"
Warning Failed 23s kubelet, node3 Error: ImagePullBackOff
Normal Pulling 8s (x2 over 54s) kubelet, node3 Pulling image "jboss/keycloak:9.0.2"Why can't pull image successfully?
As the comment suggests, this seems to be a firewall related problem. I've just ran the same commands on a local minikube instance and it worked well.
Can your cluster pull other images from dockerhub?
You can ssh into any of your worker nodes and try to use docker pull to find out.