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三、集群可用性测试

1. 创建nginx ds

 # 写入配置
$ cat > nginx-ds.yml <<EOF
apiVersion: v1
kind: Service
metadata:name: nginx-dslabels:app: nginx-ds
spec:type: NodePortselector:app: nginx-dsports:- name: httpport: 80targetPort: 80
---
apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:name: nginx-dslabels:addonmanager.kubernetes.io/mode: Reconcile
spec:template:metadata:labels:app: nginx-dsspec:containers:- name: my-nginximage: nginx:1.7.9ports:- 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>

3. 检查dns可用性

# 创建一个nginx pod
$ cat > pod-nginx.yaml <<EOF
apiVersion: v1
kind: Pod
metadata:name: nginx
spec:containers:- name: nginximage: nginx:1.7.9ports:- containerPort: 80
EOF# 创建pod
$ kubectl create -f pod-nginx.yaml# 进入pod，查看dns
$ kubectl exec  nginx -i -t -- /bin/bash# 查看dns配置
root@nginx:/# cat /etc/resolv.conf# 查看名字是否可以正确解析
root@nginx:/# ping nginx-ds