Question

我在Google Cloud Platform中创建了一个kubernetes集群，此后，我在集群上安装了Helm / tiller，然后像正式文档所述那样安装了带头盔的traefik。

现在，我正在尝试为服务创建一个Ingress，但是如果我添加注释kubernetes.io/ingress.class: traefik，则不会创建Ingress的负载平衡器。但是没有注释，它可以与默认的Ingress一起使用。（服务类型为节点端口）

编辑：我还在干净的Google Cloud kubernetes集群中尝试了此示例：https://supergiant.io/blog/using-traefik-as-ingress-controller-for-your-kubernetes-cluster/，但是当我选择kubernetes.io/ingress.class: traefik时，不会为入口创建负载均衡器。

我的文件是： animals-svc.yaml:

---
apiVersion: v1
kind: Service
metadata:
  name: bear
spec:
  type: NodePort
  ports:
  - name: http
    targetPort: 80
    port: 80
  selector:
    app: animals
    task: bear
---
apiVersion: v1
kind: Service
metadata:
  name: moose
spec:
  type: NodePort
  ports:
  - name: http
    targetPort: 80
    port: 80
  selector:
    app: animals
    task: moose
---
apiVersion: v1
kind: Service
metadata:
  name: hare
  annotations:
    traefik.backend.circuitbreaker: "NetworkErrorRatio() > 0.5"
spec:
  type: NodePort
  ports:
  - name: http
    targetPort: 80
    port: 80
  selector:
    app: animals
    task: hare

animals-ingress.yaml:

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: animals
  annotations:
    kubernetes.io/ingress.class: traefik
    # kubernetes.io/ingress.global-static-ip-name: "my-reserved-global-ip"
    # traefik.ingress.kubernetes.io/frontend-entry-points: http
    # traefik.ingress.kubernetes.io/redirect-entry-point: http
    # traefik.ingress.kubernetes.io/redirect-permanent: "true"
spec:
  rules:
  - host: hare.minikube
    http:
      paths:
      - path: /
        backend:
          serviceName: hare
          servicePort: http
  - host: bear.minikube
    http:
      paths:
      - path: /
        backend:
          serviceName: bear
          servicePort: http
  - host: moose.minikube
    http:
      paths:
      - path: /
        backend:
          serviceName: moose
          servicePort: http

animals-deployment.yaml:

---
kind: Deployment
apiVersion: extensions/v1beta1
metadata:
  name: bear
  labels:
    app: animals
    animal: bear
spec:
  replicas: 2
  selector:
    matchLabels:
      app: animals
      task: bear
  template:
    metadata:
      labels:
        app: animals
        task: bear
        version: v0.0.1
    spec:
      containers:
      - name: bear
        image: supergiantkir/animals:bear
        ports:
        - containerPort: 80
---
kind: Deployment
apiVersion: extensions/v1beta1
metadata:
  name: moose
  labels:
    app: animals
    animal: moose
spec:
  replicas: 2
  selector:
    matchLabels:
      app: animals
      task: moose
  template:
    metadata:
      labels:
        app: animals
        task: moose
        version: v0.0.1
    spec:
      containers:
      - name: moose
        image: supergiantkir/animals:moose
        ports:
        - containerPort: 80
---
kind: Deployment
apiVersion: extensions/v1beta1
metadata:
  name: hare
  labels:
    app: animals
    animal: hare
spec:
  replicas: 2
  selector:
    matchLabels:
      app: animals
      task: hare
  template:
    metadata:
      labels:
        app: animals
        task: hare
        version: v0.0.1
    spec:
      containers:
      - name: hare
        image: supergiantkir/animals:hare
        ports:
        - containerPort: 80

服务已创建，但未创建入口负载均衡器：

但是，如果我删除行kubernetes.io/ingress.class: traefik，它将适用于Kubernetes的默认入口

Answer 1

您可以尝试如下添加更多注释

traefik.ingress.kubernetes.io/frontend-entry-points: http,https
traefik.ingress.kubernetes.io/redirect-entry-point: https
traefik.ingress.kubernetes.io/redirect-permanent: "true"

喜欢这个

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: traefik-dashboard-ingress
  namespace: traefik
  annotations:
    kubernetes.io/ingress.class: traefik
    traefik.ingress.kubernetes.io/frontend-entry-points: http,https
    traefik.ingress.kubernetes.io/redirect-entry-point: https
    traefik.ingress.kubernetes.io/redirect-permanent: "true"
spec:
  rules:
  - host: traefik-ui.example.com
    http:
      paths:
      - path: /
        backend:
          serviceName: traefik-dashboard
          servicePort: 8080

Answer 2

Traefik默认情况下不会为您创建负载均衡器。

HTTP(s) load balancing with Ingress文档中提到：

创建Ingress对象时，GKE入口控制器将创建 Google Cloud Platform HTTP（S）负载均衡器并对其进行配置根据Ingress及其关联的信息服务。

这全部适用于GKE入口控制器（gce）-有关gce的更多信息，您可以在这里找到：https://github.com/kubernetes/ingress-gce

如果您想使用Traefik作为入口-您必须使用type: LoadBalancer公开Traefik服务

示例：

apiVersion: v1
kind: Service
metadata:
  name: traefik
spec:
  type: LoadBalancer
  selector:
    k8s-app: traefik-ingress-lb
  ports:
  - port: 80
    targetPort: 80

更多信息，其中包含许多说明图和实际工作示例，您可以在Exposing Kubernetes Services to the internet using Traefik Ingress Controller文章中找到。

希望获得帮助。

Kubernetes Ingress不适用于traefisk

2 个答案: