Documentation says that I need to enter pod, but I can't.
sudo kubectl get pods -n kube-system gives me following output:
coredns-66bff467f8-bhwrx 1/1 Running 4 10h
coredns-66bff467f8-ph2pb 1/1 Running 4 10h
etcd-ubuntu-xenial 1/1 Running 3 10h
ingress-nginx-admission-create-mww2h 0/1 Completed 0 4h48m
ingress-nginx-admission-patch-9dklm 0/1 Completed 0 4h48m
ingress-nginx-controller-7bb4c67d67-8nqcw 1/1 Running 1 4h48m
kube-apiserver-ubuntu-xenial 1/1 Running 3 10h
kube-controller-manager-ubuntu-xenial 1/1 Running 3 10h
kube-proxy-hn9qw 1/1 Running 3 10h
kube-scheduler-ubuntu-xenial 1/1 Running 3 10h
storage-provisioner 1/1 Running 4 10hWhen I trying to enter sudo kubectl exec ingress-nginx-controller-7bb4c67d67-8nqcw -- /bin/bash/ I receive following error:
Error from server (NotFound): pods "ingress-nginx-controller-7bb4c67d67-8nqcw" not found
Reason why I'm running everything with sudo is because I'm using vm-dirver=none
Reason why I need to know ingress controller version is because I want to use a wildcard in host name to forward multiple subdomains to same service/port. And I know that this feature is available only from ingress controller version 1.18.
You get that error because you are not passing the namespace parameter (-n kube-system).
And to get the version, you would do this:
kubectl get po ingress-nginx-controller-7bb4c67d67-8nqcw -n kube-system -oyaml | grep -i image: