普罗米修斯的AlertManager中的CrashLoopBackOff

Question

我正在尝试为我的Kubernetes集群设置AlertManager。我遵循了这个文档(https://github.com/coreos/prometheus-operator/blob/master/Documentation/user-guides/getting-started.md) -> Everything Ok。

为了设置AlertManager，我正在研究这篇文档(https://github.com/coreos/prometheus-operator/blob/master/Documentation/user-guides/alerting.md)

我正在获取alertmanager-example-0的CrashLoopBackOff。请检查附件中的日志：

第一张图片：$ kubectl logs -f prometheus-operator-88fcf6d95-zctgw -n monitoring

第二张图片：$ kubectl describe pod alertmanager-example-0

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谁能指出我做错了什么？提前谢谢。

Answer 1

听起来您遇到了一个问题，警报管理器pod使用的RBAC和Service Account (system:serviceaccount:monitoring:prometheus-operator)没有足够的权限与kube-apiserver通信。

在您的示例中，普罗米修斯运算符有一个如下所示的ClusterRoleBinding prometheus-operator：

$ kubectl get clusterrolebinding prometheus-operator -o=yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  labels:
    app: prometheus-operator
  name: prometheus-operator
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: prometheus-operator
subjects:
- kind: ServiceAccount
  name: prometheus-operator
  namespace: monitoring

更重要的是，ClusterRole应该看起来像这样：

$ kubectl get clusterrole prometheus-operator -o=yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  labels:
    app: prometheus-operator
  name: prometheus-operator
rules:
- apiGroups:
  - extensions
  resources:
  - thirdpartyresources
  verbs:
  - '*'
- apiGroups:
  - apiextensions.k8s.io
  resources:
  - customresourcedefinitions
  verbs:
  - '*'
- apiGroups:
  - monitoring.coreos.com
  resources:
  - alertmanager
  - alertmanagers
  - prometheus
  - prometheuses
  - service-monitor
  - servicemonitors
  - prometheusrules
  verbs:
  - '*'
- apiGroups:
  - apps
  resources:
  - statefulsets
  verbs:
  - '*'
- apiGroups:
  - ""
  resources:
  - configmaps
  - secrets
  verbs:
  - '*'
- apiGroups:
  - ""
  resources:
  - pods
  verbs:
  - list
  - delete
- apiGroups:
  - ""
  resources:
  - services
  - endpoints
  verbs:
  - get
  - create
  - update
- apiGroups:
  - ""
  resources:
  - nodes
  verbs:
  - list
  - watch
- apiGroups:
  - ""
  resources:
  - namespaces
  verbs:
  - list
  - watch