Kubernetes CKA sample exam question 4 with answer

Question
Create a new deployment called web-003.
Scale the deployment to 3 replicas.
Make sure the desired number of pods is always running.

Answer
It seems to be an easy answer:

kubectl create deployment web-003 --image=nginx --replicas=3

Verify:

kubectl get deploy
kubectl get po

Seems that during the verifications no pods are up, let's go into the deep.
Check pods in kube-system namespace:

kubectl -n kube-system get po

Here in the output we observed that kube-controller-manager-controlplane pod is in the CrashLoopBackOff state.
Check the logs events of this static pod:

kubectl -n kube-system logs kube-controller-manager-controlplane
kubectl -n kube-system describe po kube-controller-manager-controlplane

During the inspection can be noticed that the binary kube-controller-man cannot be found. Apparently it should be kube-controller-manager.
To fix that, open static pod file /etc/kubernetes/manifests/kube-controller-manager.yaml and set the correct binary name in .spec.containers.command section.
Wait for changes to propagate and watch the current deployment:

kubectl get deploy -w