背景：kubernetes集群traefik ingress实现同一命名空间不同微服务模块的访问
1.安装traefik ingress

cat > traefik-ingress.yaml <<EOF
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: traefik-ingress-controller
rules:
  - apiGroups:
      - ""
    resources:
      - pods
      - services
      - endpoints
      - secrets
    verbs:
      - get
      - list
      - watch
  - apiGroups:
      - extensions
    resources:
      - ingresses
    verbs:
      - get
      - list
      - watch
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: traefik-ingress-controller
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: traefik-ingress-controller
subjects:
- kind: ServiceAccount
  name: traefik-ingress-controller
  namespace: c7n-system
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: traefik-ingress-controller
  namespace: c7n-system
---
kind: Deployment
apiVersion: apps/v1beta1
metadata:
  name: traefik-ingress-controller
  namespace: c7n-system
  labels:
    k8s-app: traefik-ingress-lb
spec:
  replicas: 1
  selector:
    matchLabels:
      k8s-app: traefik-ingress-lb
  template:
    metadata:
      labels:
        k8s-app: traefik-ingress-lb
        name: traefik-ingress-lb
    spec:
      serviceAccountName: traefik-ingress-controller
      terminationGracePeriodSeconds: 60
      containers:
      - image: traefik:v1.7.4
        imagePullPolicy: IfNotPresent
        name: traefik-ingress-lb
        args:
        - --api
        - --kubernetes
        - --logLevel=INFO
---
kind: Service
apiVersion: v1
metadata:
  name: traefik-ingress-service
  namespace: c7n-system
spec:
  selector:
    k8s-app: traefik-ingress-lb
  ports:
    - protocol: TCP
      # 该端口为 traefik ingress-controller的服务端口
      port: 80
      # 集群hosts文件中设置的 NODE_PORT_RANGE 作为 NodePort的可用范围
      # 从默认20000~40000之间选一个可用端口，让ingress-controller暴露给外部的访问
      nodePort: 23456
      name: web
    - protocol: TCP
      # 该端口为 traefik 的管理WEB界面
      port: 8080
      name: admin
  type: NodePort
EOF

2.查看k8s集群配置微服务svc

3.配置raefik ingress后端f服务

cat > traefik-choerodon.yaml <<EOF
---
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: choerodon-xiongxj
  namespace: c7n-system
spec:
  rules:
  - host: choerodon.maimailoan.cn
    http:
      paths:
      - path: /api-gateway
        backend:
          serviceName: api-gateway
          servicePort: 8080
      - path: /c7n-slaver
        backend:
          serviceName: c7n-slaver
          servicePort: 80
      - path: /chartmuseum-chartmuseum 
        backend:
          serviceName: chartmuseum-chartmuseum 
          servicePort: 8080    
      - path: /choerodon-front
        backend:
          serviceName: choerodon-front 
          servicePort: 80       
      - path: /config-server
        backend:
          serviceName: config-server 
          servicePort: 8010
      - path: /devops-service
        backend:
          serviceName: devops-service 
          servicePort: 8060
      - path: /gitlab
        backend:
          serviceName: gitlab 
          servicePort: 80
      - path: /harbor
        backend:
          serviceName: harbor-harbor-ui
          servicePort: 80
      - path: /minio
        backend:
          serviceName: minio-svc 
          servicePort: 9000
      - path: /xwiki 
        backend:
          serviceName: xwiki 
          servicePort: 8080         
    EOF 

4.查看ingress详情

5.访问