kubeclt命令

1，命令

陈述式资源管理方法：
命令
#kubectl get namespace
#kubectl get ns
#kubectl get all  (-n default)
#kubectl get create ns   app
#kubectl delete namespace app
#kubectl create deployment nginx-dp --image=harbor.od.com/public/nginx:1.7.9 -n kube-public
#kubect get deploy -n kube-public
#kubectl get deployment  -o wide -n kube-public
#kubuctl describe deployment nginx-dp -n kube-public
#kubuctl get pods -n kube-public
#kubuctl exec -ti nginx-dp /bin/bash -n kube-public
#docker ps -a |grep nginx-dp
#watch -n 1 'kubectl describe deployment nginx-dp -n kube-public |grep -C 5 Event'
#kubectl delete pod nginx-dp  -n kube-public
#kubectl get all -n kube-public
# kubectl expose deployment nginx-dp --port=80 -n kube-public  创建service
# ipvsadm -Ln
# kubectl scale deployment nginx-dp --replicas=2 -n kube-public
# kubectl scale deployment nginx-dp --replicas=1 -n kube-public
# kubectl get svc -n kube-public  查看service
# kubectl describe svc nginx-dp -n kube-public

#kubectl delete svc nginx-ds 陈述式删除

声明式资源管理方法
# kubectl get pods nginx-dp-5dfc689474-pv94b -o yaml -n kube-public
# kubectl get service -n kube-public
# kubectl get svc -n kube-public
# kubectl get svc nginx-dp -o yaml -n kube-public  查看资源配置清单方法
# kubectl explain service.metadata  解释资源清单


# cat nginx-ds-svc.yaml
apiVersion: v1
kind: Service
metadata:
  labels:
    app: nginx-ds
  name: nginx-ds
  namespace: default
spec:
  ports:
  - port: 80
    protocol: TCP
    targetPort: 80
  selector:
    app: nginx-ds
  sessionAffinity: None
  type: ClusterIP

# kubectl create -f nginx-ds-svc.yaml  或 #kubectl apply -f nginx-ds-svc.yaml  应用资源配置清单
# kubectl get svc
# kubectl get svc -n default
# kubectl get svc nginx-dss -o yaml
在线修改nginx-ds-svc.yaml 
#kubectl edit svc nginx-ds
离线修改nginx-ds-svc.yaml 
#kubectl apply -f nginx-ds-svc.yaml 
#kubectl describe ds nginx-ds

#kubectl delete -f nginx-ds-svc.yaml 声明式删除
#kubectl get svc -n kube-public

2，问题

（1）

]# kubectl get pods -n kube-public
NAME                        READY   STATUS    RESTARTS   AGE
nginx-dp-5dfc689474-pv94b   0/1     Pending   0          3m21s
Every 1.0s: kubectl describe deployment nginx-dp -n kube-public |grep -C 5 Event                                                                                       Sun Nov 21 21:36:29 2021

  ----           ------  ------
  Available      False   MinimumReplicasUnavailable
  Progressing    True    ReplicaSetUpdated
OldReplicaSets:  
NewReplicaSet:   nginx-dp-5dfc689474 (1/1 replicas created)
Events:
  Type    Reason             Age    From                   Message
  ----    ------             ----   ----                   -------
  Normal  ScalingReplicaSet  5m53s  deployment-controller  Scaled up replica set nginx-dp-5dfc689474 to 1