rancher导入k8s集群后添加监控无数据

1、日志报错

rancher导入k8s集群后添加监控无数据，rancher日志报错：

k8s.io/kube-state-metrics/pkg/collectors/builder.go:: Failed to list *v1beta1.PodDisruptionBudget: poddisruptionbudgets.policy is forbidden: User "system:serviceaccount:cattle-prometheus:exporter-kube-state-cluster-monitoring" cannot list resource "poddisruptionbudgets" in API group "policy" at the cluster scope

2、原因

原因：是因为没有对 poddisruptionbudgets 源进行授权。

3、解决

参考：https://github.com/thxCode/rancher-system-charts/commit/48076079df0864489a669cea0380590f5dfca282

1）先查看 exporter-kube-state-cluster-monitoring 容器的 yaml 配置文件，是否含有 poddisruptionbudgets 源的权限定义：

kubectl -n cattle-prometheus get clusterrole/exporter-kube-state-cluster-monitoring -o yaml

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  creationTimestamp: "2019-05-24T07:07:04Z"
  labels:
    app: exporter-kube-state
    chart: exporter-kube-state-0.0.
    heritage: Tiller
    io.cattle.field/appId: cluster-monitoring
    release: cluster-monitoring
  name: exporter-kube-state-cluster-monitoring
  resourceVersion: ""
  selfLink: /apis/rbac.authorization.k8s.io/v1/clusterroles/exporter-kube-state-cluster-monitoring
  uid: 88e7bfe7-7df2-11e9-b769-0232e60a22fc
rules:
- apiGroups:
  - ""
  resources:
  - namespaces
  - nodes
  - pods
  - services
  - resourcequotas
  - replicationcontrollers
  - limitranges
  - persistentvolumeclaims
  - persistentvolumes
  - endpoints
  - configmaps
  - secrets
  verbs:
  - list
  - watch
- apiGroups:
  - extensions
  resources:
  - daemonsets
  - deployments
  - replicasets
  verbs:
  - list
  - watch
- apiGroups:
  - apps
  resources:
  - statefulsets
  - deployments
  verbs:
  - list
  - watch
- apiGroups:
  - batch
  resources:
  - cronjobs
  - jobs
  verbs:
  - list
  - watch
- apiGroups:
  - autoscaling
  resources:
  - horizontalpodautoscalers
  verbs:
  - list
  - watch

2）发现没有相关配置，则先导出配置文件：

kubectl -n cattle-prometheus get clusterrole/exporter-kube-state-cluster-monitoring -o yaml >kube-state-ClusterRole.yaml

3）然后在最后面添加：

- apiGroups:
  - autoscaling
  resources:
  - horizontalpodautoscalers
  verbs:
  - list
  - watch

4）再应用配置

kubectl apply -f kube-state-ClusterRole.yaml

5）最后可以看到图表了：