kubernetes之ingress安装及遇到的rbac问题

话不多少，直接上创建步骤

一、default-backend

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: default-http-backend
  labels:
    k8s-app: default-http-backend
  namespace: kube-system
spec:
  replicas: 1
  template:
    metadata:
      labels:
        k8s-app: default-http-backend
    spec:
      terminationGracePeriodSeconds: 60
      containers:
      - name: default-http-backend
        # Any image is permissable as long as:
        # 1. It serves a 404 page at /
        # 2. It serves 200 on a /healthz endpoint
        image: registry.cn-beijing.aliyuncs.com/gcrs/defaultbackend:1.0  
        livenessProbe:
          httpGet:
            path: /healthz
            port: 8080
            scheme: HTTP
          initialDelaySeconds: 30
          timeoutSeconds: 5
        ports:
        - containerPort: 8080
        resources:
          limits:
            cpu: 10m
            memory: 20Mi
          requests:
            cpu: 10m
            memory: 20Mi
---
apiVersion: v1
kind: Service
metadata:
  name: default-http-backend
  namespace: kube-system
  labels:
    k8s-app: default-http-backend
spec:
  ports:
  - port: 80
    targetPort: 8080
  selector:
    k8s-app: default-http-backend

二、ingress-controlerr

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: nginx-ingress-controller
  labels:
    k8s-app: nginx-ingress-controller
  namespace: kube-system
spec:
  replicas: 1
  template:
    metadata:
      labels:
        k8s-app: nginx-ingress-controller
      annotations:
        prometheus.io/port: '10254'
        prometheus.io/scrape: 'true'
    spec:
      # hostNetwork makes it possible to use ipv6 and to preserve the source IP correctly regardless of docker configuration
      # however, it is not a hard dependency of the nginx-ingress-controller itself and it may cause issues if port 10254 already is taken on the ho
st
      # that said, since hostPort is broken on CNI (https://github.com/kubernetes/kubernetes/issues/31307) we have to use hostNetwork where CNI is u
sed
      # like with kubeadm
      hostNetwork: true
      serviceAccountName: ingress
      terminationGracePeriodSeconds: 60
      containers:
      - image: registry.cn-hangzhou.aliyuncs.com/souban/nginx-ingress-controller:0.9.0-beta.10  
        name: nginx-ingress-controller
        readinessProbe:
          httpGet:
            path: /healthz
            port: 10254
            scheme: HTTP
        livenessProbe:
          httpGet:
            path: /healthz
            port: 10254
            scheme: HTTP
          initialDelaySeconds: 10
          timeoutSeconds: 1
        ports:
        - containerPort: 80
          hostPort: 80
        - containerPort: 443
          hostPort: 443
        env:
          - name: POD_NAME
            valueFrom:
              fieldRef:
                fieldPath: metadata.name
          - name: POD_NAMESPACE
            valueFrom:
              fieldRef:
                fieldPath: metadata.namespace
        args:
        - /nginx-ingress-controller
        - --default-backend-service=$(POD_NAMESPACE)/default-http-backend

三、创建测试应用

1、tea.yaml
      apiVersion: v1
      kind: Service
      metadata:
        name: tea-svc
        labels:
          app: tea
      spec:
        ports:
        - port: 808
          targetPort: 80
          protocol: TCP
          name: http
        selector:
          app: tea
      ---
      apiVersion: v1
      kind: ReplicationController
      metadata:
        name: tea-rc
      spec:
        replicas: 1
        template:
          metadata:
            labels:
              app: tea
          spec:
            containers:
            - name: tea
              image: nginxdemos/hello
              ports:
              - containerPort: 80
2、coffee.yaml
    apiVersion: v1
    kind: Service
    metadata:
      name: coffee-svc
      labels:
        app: coffee
    spec:
      ports:
      - port: 806
        targetPort: 80
        protocol: TCP
        name: http
      selector:
        app: coffee
    ---
    apiVersion: v1
    kind: ReplicationController
    metadata:
      name: coffee-rc
    spec:
      replicas: 1
      template:
        metadata:
          labels:
            app: coffee
        spec:
          containers:
          - name: coffee
            image: nginxdemos/hello
            ports:
            - containerPort: 80

四、ingress

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: test
  annotations:
    ingress.kubernetes.io/force-ssl-redirect: "false"
    ingress.kubernetes.io/ssl-redirect: "false"
spec:
  rules:
  - http:
      paths:
      - path: /tea
        backend:
          serviceName: tea-svc
          servicePort: 808
      - path: /coffee
        backend:
          serviceName: coffee-svc
          servicePort: 806

测试

http://nodeip/tea
http://nodeip/coffee

rbac问题

no service with name kube-system/default-http-backend found: the server does not allow access to the 
requested resource (get services default-http-backend)
此问题为访问apiserver权限问题，请自行创建rabc。

参考

https://github.com/kubernetes/ingress/issues/575
https://github.com/kubernetes/ingress/tree/master/examples/deployment/nginx
https://github.com/nginxinc/kubernetes-ingress/tree/master/examples/complete-example

补充

annotations这个参数也比较重要
https://github.com/kubernetes/ingress/blob/master/docs/annotations.md