# kubernetes 实战应用部署 > kubernetes 一些应用的部署， yaml 文件编写 # 1 kubernetes 应用部署 ## 1.1 部署一个 nginx rc > 编写 一个 nginx yaml ``` apiVersion: v1 kind: ReplicationController metadata: name: nginx-rc spec: replicas: 2 selector: name: nginx template: metadata: labels: name: nginx spec: containers: - name: nginx image: nginx imagePullPolicy: IfNotPresent ports: - containerPort: 80 ``` ``` [root@k8s-master ~]#kubectl get rc NAME DESIRED CURRENT READY AGE nginx-rc 2 2 2 2m [root@k8s-master ~]#kubectl get pod -o wide NAME READY STATUS RESTARTS AGE IP NODE nginx-rc-2s8k9 1/1 Running 0 10m 10.32.0.3 k8s-node-1 nginx-rc-s16cm 1/1 Running 0 10m 10.40.0.1 k8s-node-2 ``` > 编写一个 nginx service 让集群内部容器可以访问 (ClusterIp) ``` apiVersion: v1 kind: Service metadata: name: nginx-svc spec: ports: - port: 80 targetPort: 80 protocol: TCP selector: name: nginx ``` ``` [root@k8s-master ~]#kubectl create -f nginx-svc.yaml service "nginx-svc" created [root@k8s-master ~]#kubectl get svc -o wide NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR kubernetes 10.0.0.1 443/TCP 2d nginx-svc 10.6.164.79 80/TCP 29s name=nginx ``` > 编写一个 curl 的pods ``` apiVersion: v1 kind: Pod metadata: name: curl spec: containers: - name: curl image: radial/busyboxplus:curl command: - sh - -c - while true; do sleep 1; done ``` ``` # 测试pods 内部通信 [root@k8s-master ~]#kubectl exec curl curl nginx ``` ``` # 在任何node节点中，可使用ip访问 [root@k8s-node-1 ~]# curl 10.6.164.79 [root@k8s-node-2 ~]# curl 10.6.164.79 ``` > 编写一个 nginx service 让外部可以访问 (NodePort) ``` apiVersion: v1 kind: Service metadata: name: nginx-svc-node spec: ports: - port: 80 targetPort: 80 protocol: TCP type: NodePort selector: name: nginx ``` ``` [root@k8s-master ~]#kubectl get svc -o wide NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR kubernetes 10.0.0.1 443/TCP 2d nginx-svc 10.6.164.79 80/TCP 29m name=nginx nginx-svc-node 10.12.95.227 80/TCP 17s name=nginx [root@k8s-master ~]#kubectl describe svc nginx-svc-node |grep NodePort Type: NodePort NodePort: 32669/TCP ``` ``` # 使用 ALL node节点物理IP + 端口访问 http://localhost:32669 ``` ## 1.2 部署一个 zookeeper 集群 > 编写 一个 zookeeper-cluster.yaml ``` apiVersion: extensions/v1beta1 kind: Deployment metadata: name: zookeeper-1 spec: replicas: 1 template: metadata: labels: name: zookeeper-1 spec: containers: - name: zookeeper-1 image: zk:alpine imagePullPolicy: IfNotPresent env: - name: NODE_ID value: "1" - name: NODES value: "0.0.0.0,zookeeper-2,zookeeper-3" ports: - containerPort: 2181 --- apiVersion: extensions/v1beta1 kind: Deployment metadata: name: zookeeper-2 spec: replicas: 1 template: metadata: labels: name: zookeeper-2 spec: containers: - name: zookeeper-2 image: zk:alpine imagePullPolicy: IfNotPresent env: - name: NODE_ID value: "2" - name: NODES value: "zookeeper-1,0.0.0.0,zookeeper-3" ports: - containerPort: 2181 --- apiVersion: extensions/v1beta1 kind: Deployment metadata: name: zookeeper-3 spec: replicas: 1 template: metadata: labels: name: zookeeper-3 spec: containers: - name: zookeeper-3 image: zk:alpine imagePullPolicy: IfNotPresent env: - name: NODE_ID value: "3" - name: NODES value: "zookeeper-1,zookeeper-2,0.0.0.0" ports: - containerPort: 2181 --- apiVersion: v1 kind: Service metadata: name: zookeeper-1 labels: name: zookeeper-1 spec: ports: - name: client port: 2181 protocol: TCP - name: followers port: 2888 protocol: TCP - name: election port: 3888 protocol: TCP selector: name: zookeeper-1 --- apiVersion: v1 kind: Service metadata: name: zookeeper-2 labels: name: zookeeper-2 spec: ports: - name: client port: 2181 protocol: TCP - name: followers port: 2888 protocol: TCP - name: election port: 3888 protocol: TCP selector: name: zookeeper-2 --- apiVersion: v1 kind: Service metadata: name: zookeeper-3 labels: name: zookeeper-3 spec: ports: - name: client port: 2181 protocol: TCP - name: followers port: 2888 protocol: TCP - name: election port: 3888 protocol: TCP selector: name: zookeeper-3 ``` ``` [root@k8s-master ~]#kubectl create -f zookeeper-cluster.yaml --record [root@k8s-master ~]#kubectl get pods -o wide NAME READY STATUS RESTARTS AGE IP NODE zookeeper-1-2149121414-cfyt4 1/1 Running 0 51m 10.32.0.3 k8s-node-1 zookeeper-2-2653289864-0bxee 1/1 Running 0 51m 10.40.0.1 k8s-node-2 zookeeper-3-3158769034-5csqy 1/1 Running 0 51m 10.40.0.2 k8s-node-2 [root@k8s-master ~]#kubectl get deployment -o wide NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE zookeeper-1 1 1 1 1 51m zookeeper-2 1 1 1 1 51m zookeeper-3 1 1 1 1 51m [root@k8s-master ~]#kubectl get svc -o wide NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR zookeeper-1 10.8.111.19 2181/TCP,2888/TCP,3888/TCP 51m name=zookeeper-1 zookeeper-2 10.6.10.124 2181/TCP,2888/TCP,3888/TCP 51m name=zookeeper-2 zookeeper-3 10.0.146.143 2181/TCP,2888/TCP,3888/TCP 51m name=zookeeper-3 ``` ## 1.3 部署一个 kafka 集群 > 编写 一个 kafka-cluster.yaml ``` apiVersion: extensions/v1beta1 kind: Deployment metadata: name: kafka-deployment-1 spec: replicas: 1 template: metadata: labels: name: kafka-1 spec: containers: - name: kafka-1 image: kafka:alpine imagePullPolicy: IfNotPresent env: - name: NODE_ID value: "1" - name: ZK_NODES value: "zookeeper-1,zookeeper-2,zookeeper-3" ports: - containerPort: 9092 --- apiVersion: extensions/v1beta1 kind: Deployment metadata: name: kafka-deployment-2 spec: replicas: 1 template: metadata: labels: name: kafka-2 spec: containers: - name: kafka-2 image: kafka:alpine imagePullPolicy: IfNotPresent env: - name: NODE_ID value: "2" - name: ZK_NODES value: "zookeeper-1,zookeeper-2,zookeeper-3" ports: - containerPort: 9092 --- apiVersion: extensions/v1beta1 kind: Deployment metadata: name: kafka-deployment-3 spec: replicas: 1 template: metadata: labels: name: kafka-3 spec: containers: - name: kafka-3 image: kafka:alpine imagePullPolicy: IfNotPresent env: - name: NODE_ID value: "3" - name: ZK_NODES value: "zookeeper-1,zookeeper-2,zookeeper-3" ports: - containerPort: 9092 --- apiVersion: v1 kind: Service metadata: name: kafka-1 labels: name: kafka-1 spec: ports: - name: client port: 9092 protocol: TCP selector: name: kafka-1 --- apiVersion: v1 kind: Service metadata: name: kafka-2 labels: name: kafka-2 spec: ports: - name: client port: 9092 protocol: TCP selector: name: kafka-2 --- apiVersion: v1 kind: Service metadata: name: kafka-3 labels: name: kafka-3 spec: ports: - name: client port: 9092 protocol: TCP selector: name: kafka-3 ```