k8s部署nginx集群
环境：
两台虚拟机，
10.10.20.203 部署docker、etcd、flannel、kube-apiserver、kube-controller-manager、kube-scheduler
10.10.20.206 部署docker、flannel、kubelet、kube-proxy
1、创建nginx-rc.yaml
apiVersion: v1 kind: ReplicationController metadata: name: nginx-controller spec: replicas: 2 selector: name: nginx template: metadata: labels: name: nginx spec: containers: - name: nginx image: nginx ports: - containerPort: 80
2、创建nginx-service-nodeport.yaml
apiVersion: v1 kind: Service metadata: name: nginx-service-nodeport spec: ports: - port: 8000 targetPort: 80 protocol: TCP type: NodePort selector: name: nginx
3、创建pod
kubectl create -f nginx-rc.yaml
4、创建service
kubectl create -f nginx-service-nodeport.yaml
5、查看pod
[root@k8s-master ~]# kubectl get pods NAME READY STATUS RESTARTS AGE nginx-controller-v40nj 1/1 Running 1 1h nginx-controller-zxdzh 1/1 Running 1 1h
[root@k8s-master ~]# kubectl describe pod nginx-controller-v40nj Name: nginx-controller-v40nj Namespace: default Node: k8s-slave1-206/60.19.29.21 Start Time: Thu, 11 Aug 2016 19:02:20 -0700 Labels: name=nginx Status: Running IP: 10.0.83.3 Controllers: ReplicationController/nginx-controller Containers: nginx: Container ID: docker://269adc9b693aba0356ba18e4253c2b498fc7b7a8ce0af83857fcfd6b70e6ef03 Image: nginx Image ID: docker://sha256:0d409d33b27e47423b049f7f863faa08655a8c901749c2b25b93ca67d01a470d Port: 80/TCP State: Running Started: Thu, 11 Aug 2016 20:49:27 -0700 Last State: Terminated Reason: Completed Exit Code: 0 Started: Thu, 11 Aug 2016 19:03:44 -0700 Finished: Thu, 11 Aug 2016 20:12:12 -0700 Ready: True Restart Count: 1 Environment Variables: <none> Conditions: Type Status Initialized True Ready True PodScheduled True No volumes. QoS Tier: BestEffort Events: FirstSeen LastSeen Count From SubobjectPath Type Reason Message --------- -------- ----- ---- ------------- -------- ------ ------- 5m 5m 1 {kubelet k8s-slave1-206} spec.containers{nginx} Normal Pulling pulling image "nginx" 5m 5m 2 {kubelet k8s-slave1-206} Warning MissingClusterDNS kubelet does not have ClusterDNS IP configured and cannot create Pod using "ClusterFirst" policy. Falling back to DNSDefault policy. 5m 5m 1 {kubelet k8s-slave1-206} spec.containers{nginx} Normal Pulled Successfully pulled image "nginx" 5m 5m 1 {kubelet k8s-slave1-206} spec.containers{nginx} Normal Created Created container with docker id 269adc9b693a 5m 5m 1 {kubelet k8s-slave1-206} spec.containers{nginx} Normal Started Started container with docker id 269adc9b693a
6、查看service
[root@k8s-master ~]# kubectl get service NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE kubernetes 10.254.0.1 <none> 443/TCP 16h nginx-service-nodeport 10.254.29.72 <nodes> 8000/TCP 49m
[root@k8s-master ~]# kubectl describe service nginx-service-nodeport Name: nginx-service-nodeport Namespace: default Labels: <none> Selector: name=nginx Type: NodePort IP: 10.254.29.72 Port: <unset> 8000/TCP NodePort: <unset> 31152/TCP Endpoints: 10.0.83.2:80,10.0.83.3:80 Session Affinity: None No events.
7、测试service是否好用
因为service使用的是NodePort方式，所以在任何一个节点访问31152这个端口都可以访问nginx
$ curl 10.10.20.203:31152 <!DOCTYPE html> <html> <head> <title>Welcome to nginx!</title> <style> body { width: 35em; margin: 0 auto; font-family: Tahoma, Verdana, Arial, sans-serif; } </style> </head> <body> <h1>Welcome to nginx!</h1> <p>If you see this page, the nginx web server is successfully installed and working. Further configuration is required.</p> <p>For online documentation and support please refer to <a href="http://nginx.org/">nginx.org</a>.<br/> Commercial support is available at <a href="http://nginx.com/">nginx.com</a>.</p> <p><em>Thank you for using nginx.</em></p> </body> </html>
$ curl 10.10.20.206:31152 <!DOCTYPE html> <html> <head> <title>Welcome to nginx!</title> <style> body { width: 35em; margin: 0 auto; font-family: Tahoma, Verdana, Arial, sans-serif; } </style> </head> <body> <h1>Welcome to nginx!</h1> <p>If you see this page, the nginx web server is successfully installed and working. Further configuration is required.</p> <p>For online documentation and support please refer to <a href="http://nginx.org/">nginx.org</a>.<br/> Commercial support is available at <a href="http://nginx.com/">nginx.com</a>.</p> <p><em>Thank you for using nginx.</em></p> </body> </html>
