017.Kubernetes二进制部署检查集群

一 验证集群功能

1.1 检查节点状态

  1 [root@k8smaster01 ~]# kubectl get nodes

1.2 创建测试文件

  1 [root@k8smaster01 ~]# cd /opt/k8s/work
  2 [root@k8smaster01 work]# cat > nginx-ds.yml <<EOF
  3 apiVersion: v1
  4 kind: Service
  5 metadata:
  6   name: nginx-ds
  7   labels:
  8     app: nginx-ds
  9 spec:
 10   type: NodePort
 11   selector:
 12     app: nginx-ds
 13   ports:
 14   - name: http
 15     port: 80
 16     targetPort: 80
 17 ---
 18 apiVersion: extensions/v1beta1
 19 kind: DaemonSet
 20 metadata:
 21   name: nginx-ds
 22   labels:
 23     addonmanager.kubernetes.io/mode: Reconcile
 24 spec:
 25   template:
 26     metadata:
 27       labels:
 28         app: nginx-ds
 29     spec:
 30       containers:
 31       - name: my-nginx
 32         image: nginx:1.7.9
 33         ports:
 34         - containerPort: 80
 35 EOF
 36 [root@k8smaster01 work]# kubectl create -f nginx-ds.yml

1.3 检查各节点的 Pod IP 连通性

  1 [root@k8smaster01 ~]# kubectl get pods  -o wide|grep nginx-ds

  1 [root@k8smaster01 ~]# source /opt/k8s/bin/environment.sh
  2 [root@k8smaster01 ~]# for all_ip in ${ALL_IPS[@]}
  3   do
  4     echo ">>> ${all_ip}"
  5     ssh ${all_ip} "ping -c 1 172.30.240.2"
  6     ssh ${all_ip} "ping -c 1 172.30.248.2"
  7     ssh ${all_ip} "ping -c 1 172.30.144.2"
  8     ssh ${all_ip} "ping -c 1 172.30.192.2"
  9     ssh ${all_ip} "ping -c 1 172.30.136.2"
 10   done
 11 

1.4 检查服务 IP 和端口可达性

  1 [root@k8smaster01 ~]# kubectl get svc |grep nginx-ds
  2 nginx-ds     NodePort    10.254.168.17   <none>        80:32760/TCP   34m
  3 [root@k8smaster01 ~]# source /opt/k8s/bin/environment.sh
  4 [root@k8smaster01 ~]# for node_ip in ${NODE_IPS[@]}
  5   do
  6     echo ">>> ${node_ip}"
  7     ssh ${node_ip} "curl -s 10.254.168.17"
  8   done
  9 

解释：

Service Cluster IP：10.254.168.17

服务端口：80

NodePort 端口：32760

1.5 检查服务的 NodePort 可达性

  1 [root@k8smaster01 ~]# source /opt/k8s/bin/environment.sh
  2 [root@k8smaster01 ~]# for node_ip in ${NODE_IPS[@]}
  3   do
  4     echo ">>> ${node_ip}"
  5     ssh ${node_ip} "curl -s ${node_ip}:32760"
  6   done