service
# echo 111 > /usr/share/nginx/html/index.html
# echo 222 > /usr/share/nginx/html/index.html
# echo 333 > /usr/share/nginx/html/index.html
[root@master ~]# kubectl get pods -owide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx-deployment-8475f9f6cc-755tf 1/1 Running 0 13m 172.96.1.6 node2 <none> <none>
nginx-deployment-8475f9f6cc-br9zs 1/1 Running 0 9m19s 172.96.2.5 node1 <none> <none>
nginx-deployment-8475f9f6cc-d468t 1/1 Running 0 13m 172.96.2.4 node1 <none> <none>
[root@master ~]# curl 172.96.2.5
111
[root@master ~]# curl 172.96.2.4
333
[root@master ~]# curl 172.96.1.6
222
[root@master ~]#
# 暴露端口 service 8000
[root@master ~]# kubectl expose deploy nginx-deployment --port=8000 --target-port=80
service/nginx-deployment exposed
[root@master ~]# kubectl get service
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 46h
nginx-deployment ClusterIP 10.96.87.175 <none> 8000/TCP 72s
[root@master ~]# kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 46h
nginx-deployment ClusterIP 10.96.87.175 <none> 8000/TCP 76s
# 測試：負載均衡
[root@master ~]# kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 46h
nginx-deployment ClusterIP 10.96.87.175 <none> 8000/TCP 2m53s
[root@master ~]# curl 10.96.87.175:8000
111
[root@master ~]# curl 10.96.87.175:8000
111
[root@master ~]# curl 10.96.87.175:8000
333
[root@master ~]# curl 10.96.87.175:8000
222
# 查標籤
[root@master k8s]# kubectl get pod --show-labels
NAME READY STATUS RESTARTS AGE LABELS
nginx-deployment-8475f9f6cc-755tf 1/1 Running 0 32m app=my-nginx,pod-template-hash=8475f9f6cc
nginx-deployment-8475f9f6cc-br9zs 1/1 Running 0 28m app=my-nginx,pod-template-hash=8475f9f6cc
nginx-deployment-8475f9f6cc-d468t 1/1 Running 0 32m app=my-nginx,pod-template-hash=8475f9f6cc
[root@master k8s]# kubectl apply -f service-ClusterIP.yaml
service/nginx-deployment-service created
[root@master k8s]# kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 46h
nginx-deployment ClusterIP 10.96.87.175 <none> 8000/TCP 12m
nginx-deployment-service ClusterIP 10.96.169.148 <none> 8080/TCP 16s
# 集群內使用
[root@master k8s]# kubectl create deploy my-tomcat --image=tomcat
deployment.apps/my-tomcat created
# service-name:port 需要在pods內部使用
root@my-tomcat-b4c9b6565-kmzkw:/usr/local/tomcat# curl nginx-deployment-service:8080
222
root@my-tomcat-b4c9b6565-kmzkw:/usr/local/tomcat# curl nginx-deployment-service:8080
222
root@my-tomcat-b4c9b6565-kmzkw:/usr/local/tomcat# curl nginx-deployment-service:8080
333
root@my-tomcat-b4c9b6565-kmzkw:/usr/local/tomcat# curl nginx-deployment-service:8080
222
root@my-tomcat-b4c9b6565-kmzkw:/usr/local/tomcat# curl nginx-deployment-service:8080
111
# curl serviceName.namespace.svc:8080
root@my-tomcat-b4c9b6565-kmzkw:/usr/local/tomcat# curl nginx-deployment-service.default.svc:8080
111
root@my-tomcat-b4c9b6565-kmzkw:/usr/local/tomcat# curl nginx-deployment-service.default.svc:8080
333
root@my-tomcat-b4c9b6565-kmzkw:/usr/local/tomcat# curl nginx-deployment-service.default.svc:8080
222
# 刪除service
[root@master k8s]# kubectl delete service nginx-deployment
service "nginx-deployment" deleted
[root@master k8s]# kubectl delete service nginx-deployment-service
service "nginx-deployment-service" deleted
# create npde-port
[root@master k8s]# kubectl expose deploy nginx-deployment --port=8000 --target-port=80 --type=NodePort
service/nginx-deployment exposed
[root@master k8s]# kubectl get service
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 2d
nginx-deployment NodePort 10.96.130.250 <none> 8000:30427/TCP 26s
# 集群外部訪問： NodePort
[root@master k8s]# curl 10.96.130.250:8000
333
[root@master k8s]# curl 10.96.130.250:8000
111
[root@master k8s]# curl 10.96.130.250:8000
333
[root@master k8s]# curl 10.96.130.250:8000
222