kubernetes - gke 上的 traefik 设置不起作用

Question

我正在尝试按照用户指南 (https://docs.traefik.io/user-guide/kubernetes/) 在 GKE 中运行 traefik。

我没有看到仪表板，而是收到 404。我猜 RBAC 设置的某个地方有问题，但我无法弄清楚。

如有任何帮助，我们将不胜感激。

入口 Controller 日志显示恒定流量(每秒一个):

E0714 12:19:56.665790 1 reflector.go:205] github.com/containous/traefik/vendor/k8s.io/client-go/informers/factory.go:86: Failed to list *v1.Service: services is forbidden: User "system:serviceaccount:kube-system:traefik-ingress-controller" cannot list services at the cluster scope: Unknown user "system:serviceaccount:kube-system:traefik-ingress-controller"

并且 traefik pod 本身不断喷出:

E0714 12:17:45.108356 1 reflector.go:205] github.com/containous/traefik/vendor/k8s.io/client-go/informers/factory.go:86: Failed to list *v1beta1.Ingress: ingresses.extensions is forbidden: User "system:serviceaccount:default:default" cannot list ingresses.extensions in the namespace "kube-system": Unknown user "system:serviceaccount:default:default"

E0714 12:17:45.708160 1 reflector.go:205] github.com/containous/traefik/vendor/k8s.io/client-go/informers/factory.go:86: Failed to list *v1.Service: services is forbidden: User "system:serviceaccount:default:default" cannot list services in the namespace "default": Unknown user "system:serviceaccount:default:default"

E0714 12:17:45.714057 1 reflector.go:205] github.com/containous/traefik/vendor/k8s.io/client-go/informers/factory.go:86: Failed to list *v1.Endpoints: endpoints is forbidden: User "system:serviceaccount:default:default" cannot list endpoints in the namespace "kube-system": Unknown user "system:serviceaccount:default:default"

E0714 12:17:45.714829 1 reflector.go:205] github.com/containous/traefik/vendor/k8s.io/client-go/informers/factory.go:86: Failed to list *v1beta1.Ingress: ingresses.extensions is forbidden: User "system:serviceaccount:default:default" cannot list ingresses.extensions in the namespace "default": Unknown user "system:serviceaccount:default:default"

E0714 12:17:45.715653 1 reflector.go:205] github.com/containous/traefik/vendor/k8s.io/client-go/informers/factory.go:86: Failed to list *v1.Endpoints: endpoints is forbidden: User "system:serviceaccount:default:default" cannot list endpoints in the namespace "default": Unknown user "system:serviceaccount:default:default"

E0714 12:17:45.716659 1 reflector.go:205] github.com/containous/traefik/vendor/k8s.io/client-go/informers/factory.go:86: Failed to list *v1.Service: services is forbidden: User "system:serviceaccount:default:default" cannot list services in the namespace "kube-system": Unknown user "system:serviceaccount:default:default"

我使用以下方法创建了 clusterrole:

---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: traefik-ingress-controller
rules:
  - apiGroups: [""]
    resources: ["servies", "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: kube-system

然后部署 traefik 作为部署:

---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: traefik-ingress-controller
  namespace: kube-system
---
kind: Deployment
apiVersion: extensions/v1beta1
metadata:
  name: traefik-ingress-controller
  namespace: kube-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
        name: traefik-ingress-lb
        ports:
        - name: http
          containerPort: 80
        - name: admin
          containerPort: 8080
        args:
        - --api
        - --kubernetes
        - --logLevel=INFO
---
kind: Service
apiVersion: v1
metadata:
  name: traefik-ingress-service
  namespace: kube-system
spec:
  selector:
    k8s-app: traefik-ingress-lb
  ports:
    - protocol: TCP
      port: 80
      name: web
    - protocol: TCP
      port: 8080
      name: admin
  type: LoadBalancer

在使用 helm 安装 traefik 时，我使用了以下值文件:

dashboard:
  enabled: true
  domain: traefik.example.com
kubernetes:
  namespaces:
    - default
    - kube-system

最后，对于 UI，我使用了以下 yaml:

---
apiVersion: v1
kind: Service
metadata:
  name: traefik-web-ui
  namespace: kube-system
spec:
  selector:
    k8s-app: traefik-ingress-lb
  ports:
  - name: web
    port: 80
    targetPort: 8080
---
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: traefik-web-ui
  namespace: kube-system
spec:
  rules:
  - host: traefik.example.com
    http:
      paths:
      - path: /
        backend:
          serviceName: traefik-web-ui
          servicePort: web

感谢观看!

(编辑:更正标题中的拼写错误)

Answer 1

由于命名空间“kube-system”由主节点处理，您将无法在该特定命名空间上部署任何内容。 GKE 中的主节点是一项托管服务，目前用户无法访问。

如果您想拥有此功能，那么此时我能提供的唯一建议是创建您自己的 custom cluster from scratch .这将允许您访问主节点，并且您可以选择根据自己的喜好自定义集群。

编辑:我能够从 github 中找到说明关于如何使用 Traefik 作为 GKE 负载均衡器。我建议先测试它，然后再在您的生产集群中运行它。