如何在不同的命名空间上使用Nginx入口TCP服务 [英] How to use nginx ingress TCP service on different namespace

问题描述

我在kubernetes集群中部署了两个名称空间.命名空间A主机mysql和命名空间B运行postgress并在这些端口上公开其服务部署

I have deployed two namespace in the kubernetes cluster. The namespace A host mysql and namespace B run postgress and expose their service deployment on these ports

Namespace(A) - mysql - port (3306)
Namespace(B) - postgress - port (5432)

我需要使用nginx-ingress kubernetes集群来路由流量，这是入口的示例YAML文件

I need to use nginx-ingress kubernetes cluster to route the traffic based, here is the sample YAML file for the ingress

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: mysql-ingress
  annotations:
    kubernetes.io/ingress.class: nginx
spec:
  rules:
  - host: mysql-ingress
    http:
      paths:
      - path: /mysql
        backend:
          serviceName: mysql
          servicePort: 3306

此YAML文件更适合HTTP服务，如何使用nginx-ingress实现TCP服务

This YAML file is more suitable for HTTP kind of service, How to achieve the TCP service using nginx-ingress

推荐答案

您可以参考以下文档来公开tcp和udp服务.

You can refer to the following document to expose tcp and udp services.

https ://github.com/kubernetes/ingress-nginx/blob/master/docs/user-guide/exposed-tcp-udp-services.md

在我的集群中，入口控制器安装在ingress-nginx名称空间上.您可以从configmap获取tcp服务.

In my cluster, the ingress controller is installed on ingress-nginx namespace. You can get the tcp service from configmap.

kubectl get cm -n ingress-nginx tcp-services -o yaml

kubectl get cm -n ingress-nginx tcp-services -o yaml

基本上，您只需为两个数据库指定服务即可.

Basically, you just specify the service for your two databases.

data:
  "3306": NamespaceA/mysql:3306
  "5432": NamespaceB/postgress:5432

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