CKA 备考笔记

don’t forget change context

kubectl config use-context <name>

count nodes

kubectl get nodes
kubectl describe nodes|grep -i taint
kubectl describe nodes|grep -i taint|grep none|wc -l

retrieve Error Messages

kubectl logs -n <namespace> <pod> -c <container> | grep -i err

find the pod (most CPU)

kubectl top pod -n web --sort-by cpu -l app=auth

expose container port

...
spec:
  containers:
  - image: nginx
    ports:
    - containerPort: 80

svc expose to external

apiVersion: v1
kind: Service
metadata:
  name: <svcname>
  namespace: <ns>
spe