Kube-Prometheus 监控 ETCD

1、修改ETCD yaml文件

vim /etc/kubernetes/manifests/etcd.yaml 
...
--listen-metrics-urls=http://0.0.0.0:2381   # 默认是127.0.0.1,改成任意节点访问
...

2、配置ServiceMonitor，Service

cat > etcd-ServiceMonitor.yaml << 'EOF'
# ServiceMonitor 服务自动发现规则
apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
  name: etcd-k8s
  namespace: monitoring
  labels:
    k8s-app: etcd-k8s
spec:
  jobLabel: k8s-app
  selector:
    matchLabels:
      k8s-app: etcd-k8s
  namespaceSelector:
    matchNames:
    - kube-system
  endpoints:
  - port: http-etcd
    interval: 15s
---
# 创建ETCD的svc
apiVersion: v1
kind: Service
metadata:
  labels:
    k8s-app: etcd-k8s
  name: etcd-k8s
  namespace: kube-system
spec:
  ports:
  - name: http-etcd
    port: 2381
    targetPort: 2381
  selector:
    component:

3、绑定角色让Prometheus有权限访问kube-system命名空间

cat > etcd-serviceAccount.yaml << 'EOF'
# 在对应的ns中创建角色
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
  name: prometheus-k8s
  namespace: kube-system
rules:
- apiGroups:
  - ""
  resources:
  - services
  - endpoints
  - pods
  verbs:
  - get
  - list
  - watch
---
# 绑定角色 prometheus-k8s 角色到 Role
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: prometheus-k8s
  namespace: default
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: prometheus-k8s
subjects:
- kind: ServiceAccount
  name: prometheus-k8s # Prometheus 容器使用的 serviceAccount，kube-prometheus默认使用prometheus-k8s这个用户
  namespace: monitoring
EOF

4、Grafana导入模板ID： 3070