在本地kubernetes上公开服务 [英] Expose service on local kubernetes

问题描述

我正在Mac OS上运行与docker捆绑在一起的本地kubernetes.

I'm running a local kubernetes bundled with docker on Mac OS.

如何公开服务，以便可以通过Mac上的浏览器访问该服务?

How can I expose a service, so that I can access the service via a browser on my Mac?

我创建了:

a)包括Apache httpd的部署.

a) deployment including apache httpd.

b)通过Yaml服务:

b) service via yaml:

apiVersion: v1
kind: Service
metadata:
  name: apaches
spec:
  selector:
    app: web
  type: NodePort
  ports:
  - protocol: TCP
    port: 80
  externalIPs:
  - 192.168.1.10 # Network IP of my Mac

我的服务如下:

$ kubectl get service apaches
NAME      TYPE       CLUSTER-IP       EXTERNAL-IP    PORT(S)        AGE
apaches   NodePort   10.102.106.158   192.168.1.10   80:31137/TCP   14m

我可以通过wget $CLUSTER-IP

我尝试在Mac上调用 http://192.168.1.10/，但此方法无效.

I tried to call http://192.168.1.10/ on my Mac, but it doesn't work.

此问题处理类似问题.但是该解决方案没有帮助，因为我不知道可以使用哪个IP.

This question deals to a similar issue. But the solution does not help, because I do not know which IP I can use.

更新

感谢Michael Hausenblas，我使用 Ingress 制定了解决方案. 尽管如此，仍然存在一些未解决的问题:

Thanks to Michael Hausenblas I worked out a solution using Ingress. Nevertheless there are still some open questions:

• 服务的externalIP是什么意思?当我不直接从外部访问服务时，为什么需要外部IP?
• 服务端口31137是什么意思?
• • kubernetes文档描述了一种[通过NodePort在minikube中发布服务] [4]的方法.绑定在docker上的kubernetes是否也可能?
  • What is the meaning of a service's externalIP? Why do I need an externalIP when I do not directly access a service from external?
  • What is the meaning of the service port 31137?
  • • The kubernetes docs describe a method to [publish a service in minikube via NodePort][4]. Is this also possible with kubernetes bundled on docker?

    推荐答案

    有几种解决方案可以在kubernetes中公开服务: http://alesnosek .com/blog/2017/02/14/access-kubernetes-pods-from-outside-of-cluster/

    There are several solutions to expose services in kubernetes: http://alesnosek.com/blog/2017/02/14/accessing-kubernetes-pods-from-outside-of-the-cluster/

    根据alesnosek，这是我与docker捆绑在一起的本地kubernetes的解决方案:

    Here are my solutions according to alesnosek for a local kubernetes bundled with docker:

    1. hostNetwork

    hostNetwork: true
    

    肮脏(出于安全原因，不应共享主机网络)=>我没有检查此解决方案.

    Dirty (the host network should not be shared for security reasons) => I did not check this solution.

    2. hostPort

    hostPort: 8086
    

    不适用于服务=>我没有检查此解决方案.

    Does not apply to services => I did not check this solution.

    3. NodePort

    通过定义nodePort公开服务:

    Expose the service by defining a nodePort:

    apiVersion: v1
    kind: Service
    metadata:
      name: apaches
    spec:
      type: NodePort
      ports:
        - port: 80
          nodePort: 30000
      selector:
        app: apache
    

    4. LoadBalancer

    编辑 @MathObsessed在他的回答中发布了解决方案.

    EDIT @MathObsessed posted the solution in his anwer.

    5.入口

    a.安装入口控制器

    a. Install Ingress Controller

    git clone https://github.com/jnewland/local-dev-with-docker-for-mac-kubernetes.git
    
    kubectl apply -f nginx-ingress/namespaces/nginx-ingress.yaml -Rf nginx-ingress
    

    b.配置入口

    kubectl apply -f apache-ing.yaml

    apiVersion: extensions/v1beta1
    kind: Ingress
    metadata:
      name: apache-ingress
    spec:
      rules:
      - host: localhost
        http:
          paths:
          - path: /
            backend:
              serviceName: apaches
              servicePort: 80
    

    现在，我可以通过调用 http://localhost/

    Now I can access my apache deployed with kubernetes by calling http://localhost/

    使用 local-dev-with -docker-for-mac-kubernetes

    Remarks for using local-dev-with-docker-for-mac-kubernetes

    • 此回购简化了官方入口nginx的部署控制器
    • 对于生产用途，我将遵循官方指南.
    • 存储库随附小型的功能齐全的入口示例.对于快速获取可用的示例应用程序非常有用.
    • The repo simplifies the deployment of the offical ingress-nginx controller
    • For production use I would follow the official guide.
    • The repos ships with a tiny full featured ingress example. Very useful for getting quickly a working example application.

    其他文档

    • https://kubernetes.io/docs/concepts/services-networking/ingress

    这篇关于在本地kubernetes上公开服务的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！