尝试在 Kubernetes Bare-Metal 上使用 nginx-ingress-controller 公开纯 TCP

Question

我目前正在学习 kubernetes 基础，我想在我的 cluser 之外公开一个 mongodb。我已经设置了我的 nginx 入口控制器并遵循此 doc 以公开纯 TCP 连接。

这是我的入口服务配置：

apiVersion: v1
kind: Service
metadata:
  annotations:
  labels:
    helm.sh/chart: ingress-nginx-4.0.15
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/instance: ingress-nginx
    app.kubernetes.io/version: 1.1.1
    app.kubernetes.io/managed-by: Helm
    app.kubernetes.io/component: controller
  name: ingress-nginx-controller
  namespace: ingress-nginx
spec:
  type: NodePort
  ipFamilyPolicy: SingleStack
  externalIPs:
  - 172.30.63.51
  ipFamilies:
    - IPv4
  ports:
    - name: http
      port: 80
      protocol: TCP
      targetPort: http
      appProtocol: http
    - name: https
      port: 443
      protocol: TCP
      targetPort: https
      appProtocol: https
    - name: proxied-tcp-27017
      port: 27017
      protocol: TCP
      targetPort: 27017
  selector:
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/instance: ingress-nginx
    app.kubernetes.io/component: controller

代理 TCP 连接的配置映射：

apiVersion: v1
kind: ConfigMap
metadata:
  name: tcp-services
  namespace: ingress-nginx
data:
  27017: "global-stack/global-stack-mongo-svc:27017"

我的入口控制器在端口 80 和 443 上运行良好，可以公开我的服务，但我无法访问端口 27017

kubectl get svc -n ingress-nginx 结果：

NAME                                 TYPE        CLUSTER-IP      EXTERNAL-IP    PORT(S)                                
ingress-nginx-controller             NodePort    10.97.149.93    172.30.63.51   80:30159/TCP,443:32585/TCP,27017:30098/TCP
ingress-nginx-controller-admission   ClusterIP   10.107.33.165   <none>         443/TCP

外部 IP 很好地响应 curl 172.30.63.51:80

<html>
<head><title>404 Not Found</title></head>
<body>
<center><h1>404 Not Found</h1></center>
<hr><center>nginx</center>
</body>
</html>

但是无法响应端口 27017 :

curl: (7) Failed to connect to 172.30.63.51 port 27017: Connection refused

我的 mongo 服务：

apiVersion: v1
kind: Service
metadata:
  name: global-stack-mongo-svc
  namespace: global-stack
  labels:
    app: global-stack-mongo-app
spec:
  type: ClusterIP
  ports:
  - name: http
    port: 27017
    protocol: TCP
    targetPort: 27017
  selector:    
    app: global-stack-mongo-app

服务集群IP为10.244.1.57，响应良好

>> curl 10.244.1.57:27017

It looks like you are trying to access MongoDB over HTTP on the native driver port.

如果有人能帮助我，我将不胜感激。谢谢

吉埃梅。

Answer 1

经过一些研究，我解决了我的问题。

在 nginx-ingress 文档中，它没有描述，但您需要使用 ingress-controller 容器将 TCP 配置映射映射到部署文件中：

  args:
    - /nginx-ingress-controller
    - --election-id=ingress-controller-leader
    - --controller-class=k8s.io/ingress-nginx
    - --configmap=$(POD_NAMESPACE)/ingress-nginx-controller
    - --validating-webhook=:8443
    - --validating-webhook-certificate=/usr/local/certificates/cert
    - --validating-webhook-key=/usr/local/certificates/key
    - --tcp-services-configmap=ingress-nginx/tcp-services

尝试在 Kubernetes Bare-Metal 上使用 nginx-ingress-controller 公开纯 TCP

Trying to expose plain TCP with nginx-ingress-controller on Kubernetes Bare-Metal

nginx

kubernetes

kubernetes-ingress

nginx-ingress

bare-metal-server