kubectl是什么

kubernetes API是管理其各种资源对象的唯一入口，它提供了一个RESTful风格的CRUD（create，read，Update，delete）接口用于查询和修改集群状态，并且将结果存储于etcd中，API Server也是用于更新ETCD中资源对象的唯一途径，整个集群的其他所有组件都需要通过它来完成查询和修改操作，kubectl的核心功能在于通过API Server操作k8s的各种资源对象，它支持三种操作方式，其中命令是的使用最为简单，是了解K8S集群管理的一种有效途径

kubectl常用的命令

命令语法格式

kubectl [command] [TYPE] [NAME] [flags]
上面的命令是： kubectl命令行中，指定执行什么操作（command），指定什么类型资源对象（type），指定此类型的资源对象名称（name）,指定可选参数（flags）,后面的参数就是为了修饰那个唯一的对象
属于典型的英文语法，比如你是老师，你说，小明（kubectl）买（command）方便面（type）老坛酸菜方便面（name）桶装的（flag）。命令的根本原则是准确性，不能有异议！

查看集群信息

kubectl cluster-info

[root@k8s-master01 nginx]# kubectl cluster-info
Kubernetes master is running at https://172.18.15.116:6443
CoreDNS is running at https://172.18.15.116:6443/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy
To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.
[root@k8s-master01 nginx]#

查看集群版本信息

kubectl version
kubectl version —short=tre
其中第二条命令能更精简的显示集群版本信息

[root@k8s-master01 nginx]# kubectl version
Client Version: version.Info{Major:"1", Minor:"16", GitVersion:"v1.16.9", GitCommit:"a17149e1a189050796ced469dbd78d380f2ed5ef", GitTreeState:"clean", BuildDate:"2020-04-16T11:44:51Z", GoVersion:"go1.13.9", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"16", GitVersion:"v1.16.9", GitCommit:"a17149e1a189050796ced469dbd78d380f2ed5ef", GitTreeState:"clean", BuildDate:"2020-04-16T11:36:15Z", GoVersion:"go1.13.9", Compiler:"gc", Platform:"linux/amd64"}
[root@k8s-master01 nginx]# kubectl version --short=true
Client Version: v1.16.9
Server Version: v1.16.9
[root@k8s-master01 nginx]#

查看集群上运行了哪些资源

语法格式 kubectl get - “-“表示代表资源名称，其中资源名称后面可用跟上选项”-o wide”表示可用查看一些具体的信息
可以加上-n选项跟上pod所在的名称空间，如果不加则默认只会打印出default名称空间里面的Pod
也可以加上—all-namespaces选项打印出所有名称空间的pod资源信息

列出有哪些Pod资源

-n选项可以打印出你指定的名称空间的资源
—all-namespaces可以打印出所有的名称的资源
kubectl get pods

[root@k8s-master01 nginx]# kubectl get pods
NAME                        READY   STATUS    RESTARTS   AGE
busybox                     1/1     Running   0          31m
my-nginx-854bbd7557-phvsl   1/1     Running   0          2d
my-nginx-854bbd7557-t7f7z   1/1     Running   0          2d
[root@k8s-master01 nginx]# kubectl get pods -o wide
NAME                        READY   STATUS    RESTARTS   AGE   IP            NODE            NOMINATED NODE   READINESS GATES
busybox                     1/1     Running   0          31m   10.244.59.2   172.18.15.113   <none>           <none>
my-nginx-854bbd7557-phvsl   1/1     Running   0          2d    10.244.38.3   172.18.15.114   <none>           <none>
my-nginx-854bbd7557-t7f7z   1/1     Running   0          2d    10.244.38.7   172.18.15.114   <none>           <none>
[root@k8s-master01 nginx]# 
#打印出所有名称空间的Pod资源信息
[root@k8s-master01 nginx]# kubectl get pods --all-namespaces
NAMESPACE     NAME                        READY   STATUS    RESTARTS   AGE
default       my-nginx-854bbd7557-phvsl   1/1     Running   0          2d3h
default       my-nginx-854bbd7557-t7f7z   1/1     Running   0          2d3h
kube-system   coredns-59c6ddbf5d-bdr92    1/1     Running   0          2d3h
[root@k8s-master01 nginx]#
#只打印出kube-system名称空间的Pod
[root@k8s-master01 nginx]# kubectl get pods -n kube-system
NAME                       READY   STATUS    RESTARTS   AGE
coredns-59c6ddbf5d-bdr92   1/1     Running   0          2d3h
[root@k8s-master01 nginx]#

列出有哪些deployment资源，默认也是打印出default名称空间的deployment资源

-n选项可以打印出你指定的名称空间的资源
—all-namespaces可以打印出所有的名称的资源
kubectl get deployment

[root@k8s-master01 nginx]# kubectl get deployment
NAME       READY   UP-TO-DATE   AVAILABLE   AGE
my-nginx   2/2     2            2           2d2h
[root@k8s-master01 nginx]#
[root@k8s-master01 nginx]# kubectl get deployment -o wide
NAME       READY   UP-TO-DATE   AVAILABLE   AGE    CONTAINERS   IMAGES                                    SELECTOR
my-nginx   2/2     2            2           2d2h   my-nginx     daocloud.io/library/nginx:1.13.0-alpine   app=my-nginx
[root@k8s-master01 nginx]# 
#打印出所有的名称空间的deployment
[root@k8s-master01 nginx]# kubectl get deployment --all-namespaces
NAMESPACE     NAME       READY   UP-TO-DATE   AVAILABLE   AGE
default       my-nginx   2/2     2            2           2d3h
kube-system   coredns    1/1     1            1           2d3h
[root@k8s-master01 nginx]#

列出有哪些Service资源，默认也是打印出default名称空间的

-n选项可以打印出你指定的名称空间的资源
—all-namespaces可以打印出所有的名称的资源
kubectl get svc

[root@k8s-master01 nginx]# kubectl get svc
NAME         TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)        AGE
kubernetes   ClusterIP   10.99.0.1      <none>        443/TCP        8d
my-nginx     NodePort    10.99.44.234   <none>        80:13359/TCP   2d2h
[root@k8s-master01 nginx]#
[root@k8s-master01 nginx]# kubectl get svc -o wide
NAME         TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)        AGE    SELECTOR
kubernetes   ClusterIP   10.99.0.1      <none>        443/TCP        8d     <none>
my-nginx     NodePort    10.99.44.234   <none>        80:13359/TCP   2d2h   app=my-nginx
[root@k8s-master01 nginx]#
#只打印出kube-system名称空间的资源
[root@k8s-master01 nginx]# kubectl get svc -n kube-system
NAME       TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)                  AGE
kube-dns   ClusterIP   10.99.110.110   <none>        53/UDP,53/TCP,9153/TCP   2d3h
[root@k8s-master01 nginx]#
#打印出所有名称空间的资源
[root@k8s-master01 nginx]# kubectl get svc --all-namespaces
NAMESPACE     NAME         TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)                  AGE
default       kubernetes   ClusterIP   10.99.0.1       <none>        443/TCP                  8d
default       my-nginx     NodePort    10.99.44.234    <none>        80:13359/TCP             2d3h
kube-system   kube-dns     ClusterIP   10.99.110.110   <none>        53/UDP,53/TCP,9153/TCP   2d3h
[root@k8s-master01 nginx]#

列出集群上面有哪些名称空间 kubectl get ns

[root@k8s-master01 nginx]# kubectl get ns
NAME              STATUS   AGE
default           Active   8d
kube-node-lease   Active   8d
kube-public       Active   8d
kube-system       Active   8d
[root@k8s-master01 nginx]#

查看某一个资源更详细的信息

语法格式：kubectl describe (-f FILENAME | TYPE [NAME_PREFIX | -l label] | TYPE/NAME) [options]

查看某一个Pod资源的详细信息 kubectl describe pod podname

[root@k8s-master01 nginx]# kubectl describe pod my-nginx-854bbd7557-phvsl
Name:         my-nginx-854bbd7557-phvsl
Namespace:    default
Priority:     0
Node:         172.18.15.114/172.18.15.114
Start Time:   Mon, 01 Jun 2020 10:58:41 +0800
Labels:       app=my-nginx
              pod-template-hash=854bbd7557
Annotations:  <none>
Status:       Running
IP:           10.244.38.3
IPs:
  IP:           10.244.38.3
Controlled By:  ReplicaSet/my-nginx-854bbd7557
Containers:
  my-nginx:
    Container ID:   docker://56d6ff87faf07a332dcf625b86301946c6f7ef956634ea1f0bf147767af6df7b
    Image:          daocloud.io/library/nginx:1.13.0-alpine
    Image ID:       docker-pullable://daocloud.io/library/nginx@sha256:5c36f962c506c379bd63884976489c9c5e700c1496a6e8ea13dc404b1d258f76
    Port:           80/TCP
    Host Port:      0/TCP
    State:          Running
      Started:      Mon, 01 Jun 2020 10:58:44 +0800
    Ready:          True
    Restart Count:  0
    Environment:    <none>
    Mounts:
      /var/run/secrets/kubernetes.io/serviceaccount from default-token-gvn55 (ro)
Conditions:
  Type              Status
  Initialized       True 
  Ready             True 
  ContainersReady   True 
  PodScheduled      True 
Volumes:
  default-token-gvn55:
    Type:        Secret (a volume populated by a Secret)
    SecretName:  default-token-gvn55
    Optional:    false
QoS Class:       BestEffort
Node-Selectors:  <none>
Tolerations:     node.kubernetes.io/not-ready:NoExecute for 300s
                 node.kubernetes.io/unreachable:NoExecute for 300s
Events:          <none>
[root@k8s-master01 nginx]#

查看某一个service资源的详细信息,如果不加Service资源明，则默认会把所有的service资源都显示出来 kubectl describe svc servicename

[root@k8s-master01 nginx]# kubectl describe svc
Name:              kubernetes
Namespace:         default
Labels:            component=apiserver
                   provider=kubernetes
Annotations:       <none>
Selector:          <none>
Type:              ClusterIP
IP:                10.99.0.1
Port:              https  443/TCP
TargetPort:        6443/TCP
Endpoints:         172.18.15.116:6443
Session Affinity:  None
Events:            <none>
Name:                     my-nginx
Namespace:                default
Labels:                   app=my-nginx
Annotations:              kubectl.kubernetes.io/last-applied-configuration:
                            {"apiVersion":"v1","kind":"Service","metadata":{"annotations":{},"labels":{"app":"my-nginx"},"name":"my-nginx","namespace":"default"},"spe...
Selector:                 app=my-nginx
Type:                     NodePort
IP:                       10.99.44.234
Port:                     http  80/TCP
TargetPort:               80/TCP
NodePort:                 http  13359/TCP
Endpoints:                10.244.38.3:80,10.244.38.7:80
Session Affinity:         None
External Traffic Policy:  Cluster
Events:                   <none>
[root@k8s-master01 nginx]#
# 加资源命访问
[root@k8s-master01 nginx]# kubectl describe svc my-nginx
Name:                     my-nginx
Namespace:                default
Labels:                   app=my-nginx
Annotations:              kubectl.kubernetes.io/last-applied-configuration:
                            {"apiVersion":"v1","kind":"Service","metadata":{"annotations":{},"labels":{"app":"my-nginx"},"name":"my-nginx","namespace":"default"},"spe...
Selector:                 app=my-nginx
Type:                     NodePort
IP:                       10.99.44.234
Port:                     http  80/TCP
TargetPort:               80/TCP
NodePort:                 http  13359/TCP
Endpoints:                10.244.38.3:80,10.244.38.7:80
Session Affinity:         None
External Traffic Policy:  Cluster
Events:                   <none>
[root@k8s-master01 nginx]#

打印出Pod容器的日志,默认就是Pod类型

语法格式：kubectl logs [-f] [-p] (POD | TYPE/NAME) [-c CONTAINER] [options]

[root@k8s-master01 nginx]# kubectl get pods
NAME                        READY   STATUS    RESTARTS   AGE
busybox                     1/1     Running   0          164m
my-nginx-854bbd7557-phvsl   1/1     Running   0          2d3h
my-nginx-854bbd7557-t7f7z   1/1     Running   0          2d3h
[root@k8s-master01 nginx]# kubectl logs my-nginx-854bbd7557-phvsl
10.244.38.1 - - [02/Jun/2020:03:32:22 +0000] "GET / HTTP/1.1" 200 612 "-" "curl/7.29.0" "-"
[root@k8s-master01 nginx]#

如何进入到Pod的容器

语法格式：kubectl exec (POD | TYPE/NAME) [-c CONTAINER] [flags] — COMMAND [args…] [options]

[root@k8s-master01 nginx]# kubectl get pods
NAME                        READY   STATUS    RESTARTS   AGE
busybox                     1/1     Running   0          167m
my-nginx-854bbd7557-phvsl   1/1     Running   0          2d3h
my-nginx-854bbd7557-t7f7z   1/1     Running   0          2d3h
[root@k8s-master01 nginx]# kubectl exec -ti my-nginx-854bbd7557-phvsl /bin/sh
/ # 
/ # 
/ #

如何删除一个Pod，删除的方法有多种，通常我们应该是怎么创建的Pod就怎么删除，因为Pod有两种运行方式，一种是基于命令创建的，一种是基于配置清单创建的，但是结果都是需要使用kubectl命令来删除，只是使用的选项不同而已，

语法格式：kubectl delete ([-f FILENAME] | [-k DIRECTORY] | TYPE [(NAME | -l label | —all)]) [options]

命令式创建的Pod删除方法,因为命令创建的Pod通常是没有配置文件清单的，所以需要先get出来需要删除的Pod

kubectl delete Podname

[root@k8s-master01 nginx]# kubectl get pods
NAME                        READY   STATUS    RESTARTS   AGE
busybox                     1/1     Running   0          171m
my-nginx-854bbd7557-phvsl   1/1     Running   0          2d3h
my-nginx-854bbd7557-t7f7z   1/1     Running   0          2d3h
[root@k8s-master01 nginx]# 
[root@k8s-master01 nginx]# kubectl delete pod busybox
pod "busybox" deleted
[root@k8s-master01 nginx]# 
[root@k8s-master01 nginx]# kubectl get pods
NAME                        READY   STATUS    RESTARTS   AGE
my-nginx-854bbd7557-phvsl   1/1     Running   0          2d3h
my-nginx-854bbd7557-t7f7z   1/1     Running   0          2d3h
[root@k8s-master01 nginx]#

配置清单式的Pod删除方法,这种方法删除Pod非常简单，怎么创建的就怎么删除，只需要把apply或者create换成delete

#我们先使用配置清单创建出一个基于配置清单的Pod
[root@k8s-master01 nginx]# kubectl apply -f busybox.yml 
pod/busybox created
[root@k8s-master01 nginx]# kubectl get pods
NAME                        READY   STATUS              RESTARTS   AGE
busybox                     0/1     ContainerCreating   0          5s
my-nginx-854bbd7557-phvsl   1/1     Running             0          2d3h
my-nginx-854bbd7557-t7f7z   1/1     Running             0          2d3h
[root@k8s-master01 nginx]# kubectl get pods
NAME                        READY   STATUS    RESTARTS   AGE
busybox                     1/1     Running   0          10s
my-nginx-854bbd7557-phvsl   1/1     Running   0          2d3h
my-nginx-854bbd7557-t7f7z   1/1     Running   0          2d3h
[root@k8s-master01 nginx]#
#删除基于配置清单的Pod
[root@k8s-master01 nginx]# kubectl delete -f busybox.yml 
pod "busybox" deleted
[root@k8s-master01 nginx]# kubectl get pods
NAME                        READY   STATUS    RESTARTS   AGE
my-nginx-854bbd7557-phvsl   1/1     Running   0          2d3h
my-nginx-854bbd7557-t7f7z   1/1     Running   0          2d3h
[root@k8s-master01 nginx]#

创建资源对象

语法格式：kubectl run NAME —image=image [—env=”key=value”] [—port=port] [—replicas=replicas] [—dry-run=bool] [—overrides=inline-json] [—command] — [COMMAND] [args…] [options]
创建资源对象有run,create,apply等命令
直接通过kubectl run命令及相关选项创建的资源对象被称为直接命令式操作
用户也可以直接根据配置清单来创建资源对象
下面是基于命令式创建一个名称为web的deployment和一个名称为web-svc的Service,镜像使用的是Nginx1.13的alpine版本，并且创建了5个副本的示例

[root@k8s-master01 nginx]# kubectl run web --image=nginx:1.13.0-alpine --replicas=5
kubectl run --generator=deployment/apps.v1 is DEPRECATED and will be removed in a future version. Use kubectl run --generator=run-pod/v1 or kubectl create instead.
deployment.apps/web created
[root@k8s-master01 nginx]# 
[root@k8s-master01 nginx]# kubectl get pods -o wide
NAME                        READY   STATUS    RESTARTS   AGE    IP            NODE            NOMINATED NODE   READINESS GATES
my-nginx-854bbd7557-phvsl   1/1     Running   0          2d3h   10.244.38.3   172.18.15.114   <none>           <none>
my-nginx-854bbd7557-t7f7z   1/1     Running   0          2d3h   10.244.38.7   172.18.15.114   <none>           <none>
web-6ff4758d4d-5zkpb        1/1     Running   0          47s    10.244.38.4   172.18.15.114   <none>           <none>
web-6ff4758d4d-666wt        1/1     Running   0          47s    10.244.59.4   172.18.15.113   <none>           <none>
web-6ff4758d4d-n8plp        1/1     Running   0          47s    10.244.59.2   172.18.15.113   <none>           <none>
web-6ff4758d4d-qk4mv        1/1     Running   0          47s    10.244.59.3   172.18.15.113   <none>           <none>
web-6ff4758d4d-vmmbc        1/1     Running   0          47s    10.244.38.5   172.18.15.114   <none>           <none>
[root@k8s-master01 nginx]#
#创建一个名称为web-svc的Service资源，并且将web这个deployment里面的Pod资源包含进去
[root@k8s-master01 nginx]# kubectl expose deployment/web --name=web-svc --port=80
service/web-svc exposed
[root@k8s-master01 nginx]#
[root@k8s-master01 nginx]# kubectl get svc
NAME         TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)        AGE
kubernetes   ClusterIP   10.99.0.1       <none>        443/TCP        8d
my-nginx     NodePort    10.99.44.234    <none>        80:13359/TCP   2d3h
web-svc      ClusterIP   10.99.221.103   <none>        80/TCP         72s
[root@k8s-master01 nginx]#
#查看一下之前创建的5个Pod是否被包含到了这个Service资源里面
[root@k8s-master01 nginx]# kubectl describe svc web-svc
Name:              web-svc
Namespace:         default
Labels:            run=web
Annotations:       <none>
Selector:          run=web
Type:              ClusterIP
IP:                10.99.221.103
Port:              <unset>  80/TCP
TargetPort:        80/TCP
Endpoints:         10.244.38.4:80,10.244.38.5:80,10.244.59.2:80 + 2 more...
Session Affinity:  None
Events:            <none>
[root@k8s-master01 nginx]#
#删除，因为我们没有配置清单，所以这里删除就比较烦，如果你的操作步骤多了，很有可能自己也会忘记自己创建的对象名称叫什么
#先删除Pod相关资源步骤：
#1.找出刚刚创建的deployment
[root@k8s-master01 nginx]# kubectl get deployment
NAME       READY   UP-TO-DATE   AVAILABLE   AGE
my-nginx   2/2     2            2           2d3h
web        5/5     5            5           15m
[root@k8s-master01 nginx]#
#2.删除这个deployment
[root@k8s-master01 nginx]# kubectl delete deployment web
deployment.apps "web" deleted
[root@k8s-master01 nginx]#
#查看Pod，可以看到Pod资源已经是Terminating状态，虽然我这里比较方便，但是生产环境可能会有很多类似的资源，查找起来就没有这么方便了，所以推荐使用配置清单的方式去创建相关资源
[root@k8s-master01 nginx]# kubectl get pods
NAME                        READY   STATUS        RESTARTS   AGE
my-nginx-854bbd7557-phvsl   1/1     Running       0          2d3h
my-nginx-854bbd7557-t7f7z   1/1     Running       0          2d3h
web-6ff4758d4d-5zkpb        0/1     Terminating   0          16m
[root@k8s-master01 nginx]#
#删除service
[root@k8s-master01 nginx]# kubectl get svc
NAME         TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)        AGE
kubernetes   ClusterIP   10.99.0.1       <none>        443/TCP        8d
my-nginx     NodePort    10.99.44.234    <none>        80:13359/TCP   2d3h
web-svc      ClusterIP   10.99.221.103   <none>        80/TCP         15m
[root@k8s-master01 nginx]#
[root@k8s-master01 nginx]# kubectl delete svc web-svc
service "web-svc" deleted
[root@k8s-master01 nginx]# kubectl get svc
NAME         TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)        AGE
kubernetes   ClusterIP   10.99.0.1      <none>        443/TCP        8d
my-nginx     NodePort    10.99.44.234   <none>        80:13359/TCP   2d3h
[root@k8s-master01 nginx]#

基于配置清单创建出一个名称为my-nginx的deployment，里面运行了5个副本，并且再创建出一个名称为my-nginx的Service资源

[root@k8s-master01 nginx]# cat my-nginx.yml 
apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-nginx
spec:
  replicas: 5
  selector:
    matchLabels:
      app: my-nginx
  template:
    metadata:
      labels:
        app: my-nginx
    spec:
      containers:
      - name: my-nginx
        image: daocloud.io/library/nginx:1.13.0-alpine
        ports:
        - containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
  name: my-nginx
  labels:
    app: my-nginx
spec:
  type: NodePort
  selector:
    app: my-nginx
  ports:
  - name: http
    port: 80
    targetPort: 80
[root@k8s-master01 nginx]#
[root@k8s-master01 nginx]# kubectl apply -f my-nginx.yml 
deployment.apps/my-nginx created
service/my-nginx created
[root@k8s-master01 nginx]#
[root@k8s-master01 nginx]# kubectl get pods -o wide
NAME                        READY   STATUS    RESTARTS   AGE   IP            NODE            NOMINATED NODE   READINESS GATES
my-nginx-854bbd7557-9c9tq   1/1     Running   0          23s   10.244.59.2   172.18.15.113   <none>           <none>
my-nginx-854bbd7557-rvtkb   1/1     Running   0          23s   10.244.38.5   172.18.15.114   <none>           <none>
my-nginx-854bbd7557-w676k   1/1     Running   0          23s   10.244.38.3   172.18.15.114   <none>           <none>
my-nginx-854bbd7557-wbvjf   1/1     Running   0          23s   10.244.38.4   172.18.15.114   <none>           <none>
my-nginx-854bbd7557-wfx8k   1/1     Running   0          23s   10.244.59.3   172.18.15.113   <none>           <none>
[root@k8s-master01 nginx]#
[root@k8s-master01 nginx]# kubectl get svc -o wide
NAME         TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)        AGE   SELECTOR
kubernetes   ClusterIP   10.99.0.1      <none>        443/TCP        8d    <none>
my-nginx     NodePort    10.99.238.73   <none>        80:21954/TCP   43s   app=my-nginx
[root@k8s-master01 nginx]# 
[root@k8s-master01 nginx]# kubectl get svc -o wide
NAME         TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)        AGE   SELECTOR
kubernetes   ClusterIP   10.99.0.1      <none>        443/TCP        8d    <none>
my-nginx     NodePort    10.99.238.73   <none>        80:21954/TCP   43s   app=my-nginx
[root@k8s-master01 nginx]# kubectl describe svc my-nginx
Name:                     my-nginx
Namespace:                default
Labels:                   app=my-nginx
Annotations:              kubectl.kubernetes.io/last-applied-configuration:
                            {"apiVersion":"v1","kind":"Service","metadata":{"annotations":{},"labels":{"app":"my-nginx"},"name":"my-nginx","namespace":"default"},"spe...
Selector:                 app=my-nginx
Type:                     NodePort
IP:                       10.99.238.73
Port:                     http  80/TCP
TargetPort:               80/TCP
NodePort:                 http  21954/TCP
Endpoints:                10.244.38.3:80,10.244.38.4:80,10.244.38.5:80 + 2 more...
Session Affinity:         None
External Traffic Policy:  Cluster
Events:                   <none>
[root@k8s-master01 nginx]# 
关于如何删除前面有些，可以参考

小结

每个子命令下面还有众多的子命令，大家可以去网上找相关的资料查看，这里写的常用的也并不全，这里写的只是告诉大家一个基本的用法，使用的是实话可以使用kubectl Type —help来获取相关的帮助信息，一定要多动手去敲一敲才能深刻的理解

kubectl使用基础

kubectl是什么

kubectl常用的命令

小结