redis-slave name=redis-slave name=redis-slave 10.254.159.145 6379/TCP
我们可以通过frontend service（10.254.154.111）访问pods，但是这个IP明显是无法在外部访问的，下一节讲解如何在外部网络访问guestbook
7、外部网络访问guestbook
kubernetes 支持两种访问暴露一个服务到外部IP地址NodePorts 和LoadBalancers，另外可以查看防火墙，找到service对应的端口，如下
[root@centos1 example]# kubectl get pods,services
POD IP CONTAINER(S) IMAGE(S) HOST LABELS STATUS CREATED MESSAGE
frontend-fr5z1 172.17.0.13 centos2/192.168.1.112 name=frontend Running 22 minutes
php-redis kubernetes/example-guestbook-php-redis:v2 Running 22 minutes
frontend-gjx3t 172.17.0.14 centos2/192.168.1.112 name=frontend Running 22 minutes
php-redis kubernetes/example-guestbook-php-redis:v2 Running 22 minutes
frontend-v608r 172.17.0.12 centos2/192.168.1.112 name=frontend Running 22 minutes
php-redis kubernetes/example-guestbook-php-redis:v2 Running 22 minutes
redis-master-svar7 172.17.0.9 centos2/192.168.1.112 name=redis-master Running About an hour
master redis Running About an hour
redis-slave-31tkb 172.17.0.10 centos2/192.168.1.112 name=redis-slave Running 32 minutes
slave kubernetes/redis-slave:v2 Running 32 minutes
redis-slave-uk8nu 172.17.0.11 centos2/192.168.1.112 name=redis-slave Running 32 minutes
slave kubernetes/redis-slave:v2 Running 32 minutes
NAME LABELS SELECTOR IP(S) PORT(S)
frontend name=frontend name=frontend 10.254.154.111 80/TCP
kubernetes component=apiserver,provider=kubernetes <none> 10.254.0.2 443/TCP
kubernetes-ro component=apiserver,provider=kubernetes <none> 10.254.0.1 80/TCP
redis-master name=redis-master name=redis-master 10.254.154.90 6379/TCP
redis-slave name=redis-slave name=redis-slave 10.254.159.145 6379/TCP
[root@centos1 example]# kubectl get services
NAME LABELS SELECTOR IP(S) PORT(S)
frontend name=frontend name=frontend 10.254.154.111 80/TCP
kubernetes component=apiserver,provider=kubernetes <none> 10.254.0.2 443/TCP
kubernetes-ro component=apiserver,provider=kubernetes <none> 10.254.0.1 80/TCP
