nginx-ingress使用默认上游127.0.0.1:8181

Question

我是Kubernetes的新手，也许我的问题很愚蠢，但我不知道如何解决它

我使用这个手册https://docs.nginx.com/nginx-ingress-controller/installation/installation-with-manifests/创建了一个带有nodePort服务的nginx-ingress部署

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-ingress
  namespace: nginx-ingress
spec:
  replicas: 2
  selector:
    matchLabels:
      app: nginx-ingress
  template:
    metadata:
      labels:
        app: nginx-ingress
    spec:
      serviceAccountName: nginx-ingress
      containers:
      - image: nginx/nginx-ingress:1.9.1
        imagePullPolicy: Always
        name: nginx-ingress
        ports:
        - name: http
          containerPort: 80
        - name: readiness-port
          containerPort: 8081
        readinessProbe:
          httpGet:
            path: /nginx-ready
            port: readiness-port
          periodSeconds: 1
        securityContext:
          allowPrivilegeEscalation: true
          runAsUser: 101 #nginx
          capabilities:
            drop:
            - ALL
            add:
            - NET_BIND_SERVICE
        env:
        - name: POD_NAMESPACE
          valueFrom:
            fieldRef:
              fieldPath: metadata.namespace
        - name: POD_NAME
          valueFrom:
            fieldRef:
              fieldPath: metadata.name
        args:
          - -nginx-configmaps=$(POD_NAMESPACE)/nginx-config
          - -default-server-tls-secret=$(POD_NAMESPACE)/default-server-secret

和服务：

apiVersion: v1
kind: Service
metadata:
  name: nginx-ingress
  namespace: nginx-ingress
spec:
  type: NodePort
  ports:
    - port: 80
      targetPort: 80
      protocol: TCP
      name: http
      nodePort: 30369
  selector:
    app: nginx-ingress

并使用服务创建部署：

apiVersion: apps/v1
kind: Deployment
metadata:
  namespace: landing
  name: landing
  labels:
    app:landing
spec:
  replicas: 1
  selector:
    matchLabels:
      app: landing
  template:
    metadata:
      labels:
        app: landing
        namespace: landing
    spec:
      containers:
      - name: landing
        image: private-registry/landing
        imagePullPolicy: Always
        ports:
          - containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
  name: landing
  namespace: landing
spec:
  selector:
    app: landing
  ports:
    - protocol: TCP
      port: 80
      targetPort: 80

然后添加入口：

apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
  name: landing
  namespace: landing
  annotations:
    kubernetes.io/ingress.class: "nginx"
spec:
  ingressClassName: nginx
  rules:
  - host: landing.site
    http:
      paths:
      - path: /
        backend:
          serviceName: landing
          servicePort: 80

但在nginx-ingress POD中，我看到了默认的上行后端，

upstream default-landing-landing.site-landing-80 {
    zone default-landing-landing.site-landing-80 256k;
    random two least_conn;

    server 127.0.0.1:8181 max_fails=1 fail_timeout=10s max_conns=0;

}

我做错了什么？

Answer 1

好吧，我太愚蠢了:)我有另一个入口在默认的后端和相同的主机。删除它，一切工作正常

Answer 2

这就是nginx入口的工作方式。这里没有什么问题。默认的后端是处理nginx控制器无法理解的所有URL路径。因此，在您的示例中，任何期望landing.site/的请求都将由默认的后端提供服务，并显示一个通用的404nginx错误页面。