应用（服务）部署细节、访问方式

服务访问的方式
clusterIP(Service#spec.type: clusterIP默认值)
NodePort(Service#spec.type: NodePort)
LoadBalancer(Service#spec.type: LoadBalancer)
Ingress

暴露service：
    Service#spec.externalIPs
      externalIPs:
      - 192.168.0.75
暴露pod：
    Service#spec.containers.ports
      hostPort: 80

指定pod节点
    Pod.spec.nodeSelector
        nodeSelector:
          #node label(key: value)
          kubernetes.io/hostname: kube01
资料：
几种方式的使用场景和方法
https://blog.csdn.net/wjs7740/article/details/77088960
https://themes.gohugo.io/theme/hugo-theme-cleanwhite/2017/11/28/access-application-from-outside/
几种方式的比较
https://medium.com/google-cloud/kubernetes-nodeport-vs-loadbalancer-vs-ingress-when-should-i-use-what-922f010849e0