create namespace

kubectl apply -f namespace.yaml 


# 查看 namespace
kubectl get namespace --show-labels
kubectl config view | grep namespace:
# 切换默认namespace
kubectl config current-context
kubectl config set-context test --namespace=app01 \
  --cluster=docker-desktop \
  --user=docker-desktop

kubectl config set-context prod --namespace=production \
  --cluster=docker-desktop \
  --user=docker-desktop
kubectl config view
# 切换环境到DEV
kubectl config use-context test
# check 当前环境
kubectl config current-context
# 查看配额
kubectl get resourcequotas
kubectl get resourcequota app01-redis --output=yaml

# create configmap
kubectl create configmap app01-redis-conf --from-file=redis.conf 

kubectl  get configmap -n miles-app01

NAME                     DATA   AGE
kube-root-ca.crt         1      3m30s
miles-app01-redis-conf   1      20s

# 创建和查看 pod
kubectl apply -f app01_redis.yaml 
kubectl get pods -n app01

# 注意：configMap 会挂在 /usr/local/etc/redis/redis.conf 上。与 mountPath 和 configMap 下的 path 一同指定

kubectl get pod miles-app01-redis-b48ff8c66-q5cv2 -n miles-app01
kubectl run busybox --image=busybox --command -- ping baidu.com
kubectl exec -it busybox -- /bin/bash
k describe replicaset.apps/app01-redis-64847ffc48
k get all -ALL
k describe pods