检查组件运行状态

  1. kubectl get cs
  3. # 输出如下
  4. NAME                 STATUS    MESSAGE             ERROR
  5. # 调度服务，主要作用是将 POD 调度到 Node
  6. scheduler            Healthy   ok
  7. # 自动化修复服务，主要作用是 Node 宕机后自动修复 Node 回到正常的工作状态
  8. controller-manager   Healthy   ok
  9. # 服务注册与发现
  10. etcd-0               Healthy   {"health":"true"}

检查 Master 状态

  1. kubectl cluster-info
  3. # 输出如下
  4. Kubernetes master is running at https://192.168.1.201:6443
  5. KubeDNS is running at https://192.168.1.201:6443/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy
  7. To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.

检查 Nodes 状态

  1. kubectl get nodes
  3. # 输出如下
  4. NAME                 STATUS   ROLES    AGE    VERSION
  5. kubernetes-master    Ready    master   118m   v1.15.3
  6. kubernetes-node-01   Ready    <none>   116m   v1.15.3
  7. kubernetes-node-02   Ready    <none>   116m   v1.15.3

运行第一个容器实例*

  1. # 使用 kubectl 命令创建两个监听 80 端口的 Nginx Pod（Kubernetes 运行容器的最小单元）
  2. kubectl run nginx --image=nginx --replicas=2 --port=80
  4. # 输出如下
  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.
  6. deployment.apps/nginx created

查看全部 Pods 的状态

  1. kubectl get pods
  3. # 输出如下
  4. NAME                     READY   STATUS    RESTARTS   AGE
  5. nginx-7c45b84548-2d6sn   1/1     Running   0          19s
  6. nginx-7c45b84548-g7lqh   1/1     Running   0          19s

查看已部署的服务

  1. kubectl get deployment
  3. # 输出如下
  4. NAME    READY   UP-TO-DATE   AVAILABLE   AGE
  5. nginx   2/2     2            2           34s

发布服务*

  1. # 使用负载均衡模式发布服务，让用户可以访问
  2. kubectl expose deployment nginx --port=80 --type=LoadBalancer
  4. # 输出如下
  5. service/nginx exposed

查看已发布的服务

  1. kubectl get services
  3. # 输出如下
  4. NAME         TYPE           CLUSTER-IP      EXTERNAL-IP   PORT(S)        AGE
  5. kubernetes   ClusterIP      10.96.0.1       <none>        443/TCP        120m
  6. nginx        LoadBalancer   10.107.22.149   <pending>     80:30407/TCP   13s

查看服务详情

  1. kubectl describe service nginx
  3. # 输出如下
  4. Name:                     nginx
  5. Namespace:                default
  6. Labels:                   run=nginx
  7. Annotations:              <none>
  8. Selector:                 run=nginx
  9. Type:                     LoadBalancer
  10. IP:                       10.107.22.149
  11. Port:                     <unset>  80/TCP
  12. TargetPort:               80/TCP
  13. NodePort:                 <unset>  30407/TCP
  14. Endpoints:                10.244.140.92:80,10.244.141.223:80
  15. Session Affinity:         None
  16. External Traffic Policy:  Cluster
  17. Events:                   <none>

验证是否成功

通过浏览器访问 Node 服务器，此时 Kubernetes 会以负载均衡的方式访问部署的 Nginx 服务，能够正常看到 Nginx 的欢迎页即表示成功

http://192.168.1.[211/212]:30407/

停止服务*

删除已部署的服务

kubectl delete deployment nginx

# 输出如下
deployment.extensions "nginx" deleted

删除已发布的服务

kubectl delete service nginx

# 输出如下
service "nginx" deleted