Skip to content

Latest commit

 

History

History
128 lines (104 loc) · 2.59 KB

08.验证集群功能.md

File metadata and controls

128 lines (104 loc) · 2.59 KB

tags: verify

08.验证集群功能

本文档使用 daemonset 验证 master 和 worker 节点是否工作正常。

检查节点状态

$ kubectl get nodes
NAME         STATUS    ROLES     AGE       VERSION
kube-node1   Ready     <none>    3h        v1.10.4
kube-node2   Ready     <none>    3h        v1.10.4
kube-node3   Ready     <none>    3h        v1.10.4

都为 Ready 时正常。

创建测试文件

$ 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: extensions/v1beta1
kind: DaemonSet
metadata:
  name: nginx-ds
  labels:
    addonmanager.kubernetes.io/mode: Reconcile
spec:
  template:
    metadata:
      labels:
        app: nginx-ds
    spec:
      containers:
      - name: my-nginx
        image: nginx:1.7.9
        ports:
        - containerPort: 80
EOF

执行定义文件

$ kubectl create -f nginx-ds.yml
service "nginx-ds" created
daemonset.extensions "nginx-ds" created

检查各 Node 上的 Pod IP 连通性

$ kubectl get pods  -o wide|grep nginx-ds
nginx-ds-dbn97   1/1       Running   0          2m        172.30.29.2   kube-node2
nginx-ds-rk777   1/1       Running   0          2m        172.30.81.2   kube-node1
nginx-ds-tr9g5   1/1       Running   0          2m        172.30.39.2   kube-node3

可见,nginx-ds 的 Pod IP 分别是 172.30.39.2172.30.81.2172.30.29.2,在所有 Node 上分别 ping 这三个 IP,看是否连通:

source /opt/k8s/bin/environment.sh
for node_ip in ${NODE_IPS[@]}
  do
    echo ">>> ${node_ip}"
    ssh ${node_ip} "ping -c 1 172.30.39.2"
    ssh ${node_ip} "ping -c 1 172.30.81.2"
    ssh ${node_ip} "ping -c 1 172.30.29.2"
  done

检查服务 IP 和端口可达性

$ kubectl get svc |grep nginx-ds
nginx-ds     NodePort    10.254.254.228   <none>        80:8900/TCP   4m

可见:

  • Service Cluster IP:10.254.254.228
  • 服务端口:80
  • NodePort 端口:8900

在所有 Node 上 curl Service IP:

source /opt/k8s/bin/environment.sh
for node_ip in ${NODE_IPS[@]}
  do
    echo ">>> ${node_ip}"
    ssh ${node_ip} "curl 10.254.254.228"
  done

预期输出 nginx 欢迎页面内容。

检查服务的 NodePort 可达性

在所有 Node 上执行:

source /opt/k8s/bin/environment.sh
for node_ip in ${NODE_IPS[@]}
  do
    echo ">>> ${node_ip}"
    ssh ${node_ip} "curl ${node_ip}:8900"
  done

预期输出 nginx 欢迎页面内容。