k8s-kubeadm-集群可用性测试

1. 创建nginx ds

https://kubernetes.io/zh/docs/tasks/run-application/run-stateless-application-deployment/

 # 写入配置
$ cat > nginx-ds.yml <<EOF
apiVersion: v1
kind: Service
metadata:
  name: nginx-ds
  labels:
    app: nginx-ds
spec:
  type: NodePort
  selector:
    app: nginx-ds
  ports:
  - name: http
    port: 80
    targetPort: 80
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-ds
spec:
  selector:
    matchLabels:
      app: nginx-ds
  replicas: 2
  template:
    metadata:
      labels:
        app: nginx-ds
    spec:
      containers:
      - name: nginx
        image: nginx:1.16.1 # Update the version of nginx from 1.14.2 to 1.16.1
        ports:
        - containerPort: 80
EOF

# 创建ds
$ kubectl create -f nginx-ds.yml

2. 检查各种ip连通性

# 检查各 Node 上的 Pod IP 连通性
$ kubectl get pods  -o wide

# 在每个节点上ping pod ip
$ ping <pod-ip>

# 检查service可达性
$ kubectl get svc

# 在每个节点上访问服务
$ curl <service-ip>:<port>

# 在每个节点检查node-port可用性
$ curl <node-ip>:<port>