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kubernetes 1.3 使用skydns + kube2dns +etcd部署DNS服务器
1. 直接从Docker中拉取skydns,kube2dns,etcd容器,放到一个Pod中
- kube2sky:1.14
- etcd:2.0.9
- skydns-amd64
2. 创建RC
apiVersion: v1 kind: ReplicationController metadata: name: kube-dns-v6 namespace: default labels: k8s-app: kube-dns version: v6 kubernetes.io/cluster-service: "true" spec: replicas: 1 selector: k8s-app: kube-dns version: v6 template: metadata: labels: k8s-app: kube-dns version: v6 kubernetes.io/cluster-service: "true" spec: containers: - name: etcd image: 109.105.46.94:5000/dns/etcd:2.0.9 command: - /usr/local/bin/etcd - -listen-client-urls - http://0.0.0.0:2379,http://0.0.0.0:4001 - -advertise-client-urls - http://127.0.0.1:2379,http://127.0.0.1:4001 - -initial-cluster-token - skydns-etcd - name: kube2sky #image: 109.105.46.94:5000/dns/kube2sky:1.11 image: 109.105.46.94:5000/dns/kube2sky:1.14 resources: limits: cpu: 100m memory: 50Mi command: - /kube2sky # - -kube_master_url=http://109.105.46.94:8080 # - -domain=cluster.local - --kube-master-url=http://109.105.46.94:8080 - --domain=cluster.local - name: skydns image: 109.105.46.94:5000/dns/skydns-amd64 resources: command: - /skydns - -machines=http://localhost:4001 - -addr=0.0.0.0:53 - -domain=cluster.local. ports: - containerPort: 53 name: dns protocol: UDP - containerPort: 53 name: dns-tcp protocol: TCP dnsPolicy: Default
3.创建SVC
apiVersion: v1 kind: Service metadata: name: kube-dns namespace: default labels: k8s-app: kube-dns kubernetes.io/cluster-service: "true" kubernetes.io/name: "KubeDNS" spec: selector: k8s-app: kube-dns clusterIP: 192.168.3.100 ports: - name: dns port: 53 protocol: UDP - name: dns-tcp port: 53 protocol: TCP
4. 启动dns:
kubectl create -f skydns-etcd-rc.yaml
kubectl create -f skydns-etcd-svc.yaml
5.修改各node节点上的/etc/kubernetes/kubelet.service配置文件,增加启动参数:
--cluster-dns=192.168.3.100 \
--cluster-domain=cluster.local \
6.重启各节点:
systemctl daemon-reload
systemctl restart kubelet
kubernetes 1.3 使用skydns + kube2dns +etcd部署DNS服务器
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