一、将mysql的svc名字解析成VIP地址
二、定义yaml文件，官方下载
[root@k8s-master dns]# ls
skydns-svc.yaml skydns.yaml三、上传需要的镜像
[root@k8s-node-2 ~]# docker image ls
gcr.io/google_containers/kubedns-amd64 1.9 26cf1ed9b144 3 years ago 47 MB
gcr.io/google_containers/dnsmasq-metrics-amd64 1.0 5271aabced07 3 years ago
gcr.io/google_containers/kube-dnsmasq-amd64 1.4 3ec65756a89b 3 years ago 5.13 MB
gcr.io/google_containers/exechealthz-amd64 1.2 93a43bfb39bf 3 years ago 8.37 MB四、启动dns服务
[root@k8s-master dns]# kubectl create -f skydns.yaml
deployment "kube-dns" created
[root@k8s-master dns]# kubectl create -f skydns-svc.yaml
service "kube-dns" created五、查看dns的pod资源
[root@k8s-master dns]# kubectl get all -n kube-system
NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE
deploy/kube-dns 1 1 1 1 39s
NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE
svc/kube-dns 10.254.230.254 <none> 53/UDP,53/TCP 27s
NAME DESIRED CURRENT READY AGE
rs/kube-dns-32943122 1 1 1 39s
NAME READY STATUS RESTARTS AGE
po/kube-dns-32943122-v11kh 4/4 Running 0 39s六、节点增加dns的vip地址
[root@k8s-node-1 ~]# cat /etc/kubernetes/kubelet
###
# kubernetes kubelet (minion) config
# The address for the info server to serve on (set to 0.0.0.0 or "" for all interfaces)
KUBELET_ADDRESS="--address=0.0.0.0"
# The port for the info server to serve on
KUBELET_PORT="--port=10250"
# You may leave this blank to use the actual hostname
KUBELET_HOSTNAME="--hostname-override=10.0.0.12"
# location of the api-server
KUBELET_API_SERVER="--api-servers=http://10.0.0.11:8080"
# pod infrastructure container
KUBELET_POD_INFRA_CONTAINER="--pod-infra-container-image=10.0.0.11:5000/pod-infrastructure:latest"
# Add your own!
KUBELET_ARGS="--cluster_dns=10.254.230.254 --cluster_domain=cluster.local" #添加的vip地址，固定的七、重启节点kubelet服务
[root@k8s-node-1 ~]# systemctl restart kubelet.service
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