k8s部署kube-state-metrics

1. 需要的yaml文件

1.1 kube-state-metrics-rbac.yaml

apiVersion: v1
kind: ServiceAccount
metadata:
  name: kube-state-metrics
  namespace: monitoring
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: kube-state-metrics
rules:
- apiGroups:
  - ""
  resources:
  - configmaps
  - secrets
  - nodes
  - pods
  - services
  - resourcequotas
  - replicationcontrollers
  - limitranges
  - persistentvolumeclaims
  - persistentvolumes
  - namespaces
  - endpoints
  verbs:
  - list
  - watch
- apiGroups:
  - extensions
  resources:
  - daemonsets
  - deployments
  - replicasets
  - ingresses
  verbs:
  - list
  - watch
- apiGroups:
  - apps
  resources:
  - statefulsets
  - daemonsets
  - deployments
  - replicasets
  verbs:
  - list
  - watch
- apiGroups:
  - batch
  resources:
  - cronjobs
  - jobs
  verbs:
  - list
  - watch
- apiGroups:
  - autoscaling
  resources:
  - horizontalpodautoscalers
  verbs:
  - list
  - watch
- apiGroups:
  - authentication.k8s.io
  resources:
  - tokenreviews
  verbs:
  - create
- apiGroups:
  - authorization.k8s.io
  resources:
  - subjectacce***eviews
  verbs:
  - create
- apiGroups:
  - policy
  resources:
  - poddisruptionbudgets
  verbs:
  - list
  - watch
- apiGroups:
  - certificates.k8s.io
  resources:
  - certificatesigningrequests
  verbs:
  - list
  - watch
- apiGroups:
  - storage.k8s.io
  resources:
  - storageclasses
  verbs:
  - list
  - watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: kube-state-metrics
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: kube-state-metrics
subjects:
- kind: ServiceAccount
  name: kube-state-metrics
  namespace: monitoring
---
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
  name: kube-state-metrics
  namespace: monitoring
rules:
- apiGroups:
  - ""
  resources:
  - pods
  verbs:
  - get
- apiGroups:
  - extensions
  resourceNames:
  - kube-state-metrics
  resources:
  - deployments
  verbs:
  - get
  - update
- apiGroups:
  - apps
  resourceNames:
  - kube-state-metrics
  resources:
  - deployments
  verbs:
  - get
  - update
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: kube-state-metrics
  namespace: monitoring
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: kube-state-metrics
subjects:
- kind: ServiceAccount
  name: kube-state-metrics
​

1.2 kube-state-metrics-service.yaml

apiVersion: v1
kind: Service
metadata:
  annotations:
    prometheus.io/scrape: 'true'
  name: kube-state-metrics
  namespace: monitoring
  labels:
    k8s-app: kube-state-metrics
spec:
  type: NodePort
  ports:
  - name: http-main
    nodePort: 31080
    port: 8080
    protocol: TCP
  - name: http-self
    port: 8081
    protocol: TCP
  selector:
    app: kube-state-metrics
​

1.3 kube-state-metrics-deployment.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  name: nanny-config
  namespace: default
data:
  NannyConfiguration: |-
    apiVersion: nannyconfig/v1
    kind: NannyConfiguration
---
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: kube-state-metrics
  name: kube-state-metrics
  namespace: monitoring
spec:
  replicas: 1
  selector:
    matchLabels:
      app: kube-state-metrics
  template:
    metadata:
      labels:
        app: kube-state-metrics
    spec:
      serviceAccountName: kube-state-metrics
      containers:
      - name: kube-state-metrics
        image: bitnami/kube-state-metrics:1.9.7
        ports:
        - name: http-metrics
          containerPort: 8080
        - name: telemetry
          containerPort: 8081
        readinessProbe:
          httpGet:
            path: /healthz
            port: 8080
          initialDelaySeconds: 10
          timeoutSeconds: 10
      - name: addon-resizer
        image: juestnow/addon-resizer:1.8.5
        resources:
          limits:
            cpu: 100m
            memory: 30Mi
          requests:
            cpu: 100m
            memory: 30Mi
        env:
          - name: MY_POD_NAME
            valueFrom:
              fieldRef:
                fieldPath: metadata.name
          - name: MY_POD_NAMESPACE
            valueFrom:
              fieldRef:
                fieldPath: metadata.namespace
        command:
          - /pod_nanny
          - --container=kube-state-metrics
          - --cpu=100m
          - --extra-cpu=1m
          - --memory=200Mi
          - --extra-memory=2Mi
          - --threshold=5
          - --deployment=kube-state-metrics
      nodeSelector:
        beta.kubernetes.io/os: linux
      serviceAccountName: kube-state-metrics

2.部署

kubectl apply -f .

3.单独安装kube-state-metrics获取不到的指标

container_fs_usage_bytes  用于统计内存使用量
container_fs_limit_bytes
machine_cpu_cores  用于统计cpu
container_cpu_usage_seconds_total
machine_memory_bytes
container_memory_working_set_bytes  
container_network_receive_bytes_total  用于统计网络使用量
container_network_transmit_bytes_total

4.metrics-server和kube-state-metrics对比

	metrics-server	kube-state-metrics
输出指标接口	k8s.io/metrics/pkg/apis/metrics；Metrics Server collects resource metrics from Kubelets and exposes them in Kubernetes apiserver through Metrics API	ip:port/metrics；可被prometheus监听
使用方向	use by Horizontal Pod Autoscaler and Vertical Pod Autoscaler.	关注于获取 k8s 各种资源的最新状态