kubernetes监控-Heapster+InfluxDB+Grafana（十五）

cAdvisor+InfluxDB+Grafana

cAdvisor:是谷歌开源的一个容器监控工具，采集主机上容器相关的性能指标数据。比如CPU、内存、网络、文件系统等。

Heapster是谷歌开源的集群监控数据收集工具，会所有节点监控数据，Heapster作为一个pod在集群中运行，通过API获得集群中的所有节点，然后从节点kubelet暴露的10255汇总数据。目前社区用Metrics Server 取代 Heapster。

InfluxDB：时序数据库，存储监控数据。

Grafana：可视化展示。Grafana提供一个易于配置的仪表盘UI，可以轻松定制和扩展。

不足

l 功能单一，无法做到对K8S资源对象监控

l 告警单一，利用Grafana基本告警

l 依赖Influxdb，而Influxdb单点（高可用商业才支持），缺少开源精神

l heapster在1.8+弃用，metrics-server取代

部署heapster组件

[root@localhost monitor]# cat heapster.yaml 
apiVersion: v1
kind: ServiceAccount
metadata:
  name: heapster
  namespace: kube-system

---

kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
  name: heapster
roleRef:
  kind: ClusterRole
  name: cluster-admin
  apiGroup: rbac.authorization.k8s.io
subjects:
  - kind: ServiceAccount
    name: heapster
    namespace: kube-system

---

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: heapster
  namespace: kube-system
spec:
  replicas: 1
  template:
    metadata:
      labels:
        task: monitoring
        k8s-app: heapster
    spec:
      serviceAccountName: heapster
      containers:
      - name: heapster
        image: registry.cn-hangzhou.aliyuncs.com/google-containers/heapster-amd64:v1.5.1
        imagePullPolicy: IfNotPresent
        command:
        - /heapster
        - --source=kubernetes:https://kubernetes.default
        - --sink=influxdb:http://monitoring-influxdb:8086

---

apiVersion: v1
kind: Service
metadata:
  labels:
    task: monitoring
    kubernetes.io/cluster-service: 'true'
    kubernetes.io/name: Heapster
  name: heapster
  namespace: kube-system
spec:
  ports:
  - port: 80
    targetPort: 8082
  selector:
    k8s-app: heapster

使用top命令

[root@localhost monitor]# kubectl top nodes

NAME            CPU(cores)   CPU%   MEMORY(bytes)   MEMORY%

192.168.0.220   208m         %    1978Mi          %

192.168.0.221   137m         %     1068Mi          %

192.168.0.222   135m         %     1009Mi          %

[root@localhost monitor]# kubectl top pods

NAME                     CPU(cores)   MEMORY(bytes)

nginx-7db9fccd9b-qkb7t   0m           2Mi

nginx-7db9fccd9b-wtvk8   0m           3Mi

nginx-7db9fccd9b-xxkzb   0m           2Mi

登录Dashboard即可查看到对应的监控图表

部署grafana和influxdb

[root@localhost monitor]# cat grafana.yaml

apiVersion: extensions/v1beta1

kind: Deployment

metadata:

  name: monitoring-grafana

  namespace: kube-system

spec:

  replicas:

  template:

    metadata:

      labels:

        task: monitoring

        k8s-app: grafana

    spec:

      containers:

      - name: grafana

        image: registry.cn-hangzhou.aliyuncs.com/google-containers/heapster-grafana-amd64:v4.4.1

        ports:

          - containerPort:

            protocol: TCP

        volumeMounts:

        - mountPath: /var

          name: grafana-storage

        env:

        - name: INFLUXDB_HOST

          value: monitoring-influxdb

        - name: GF_AUTH_BASIC_ENABLED

          value: "false"

        - name: GF_AUTH_ANONYMOUS_ENABLED

          value: "true"

        - name: GF_AUTH_ANONYMOUS_ORG_ROLE

          value: Admin

        - name: GF_SERVER_ROOT_URL

          value: /

      volumes:

      - name: grafana-storage

        emptyDir: {}

---

apiVersion: v1

kind: Service

metadata:

  labels:

    kubernetes.io/cluster-service: 'true'

    kubernetes.io/name: monitoring-grafana

  name: monitoring-grafana

  namespace: kube-system

spec:

  type: NodePort

  ports:

  - port :

    targetPort:

  selector:

    k8s-app: grafana

[root@localhost monitor]# cat influxdb.yaml

apiVersion: extensions/v1beta1

kind: Deployment

metadata:

  name: monitoring-influxdb

  namespace: kube-system

spec:

  replicas:

  template:

    metadata:

      labels:

        task: monitoring

        k8s-app: influxdb

    spec:

      containers:

      - name: influxdb

        image: registry.cn-hangzhou.aliyuncs.com/google-containers/heapster-influxdb-amd64:v1.1.1

        volumeMounts:

        - mountPath: /data

          name: influxdb-storage

      volumes:

      - name: influxdb-storage

        emptyDir: {}

---

apiVersion: v1

kind: Service

metadata:

  labels:

    task: monitoring

    kubernetes.io/cluster-service: 'true'

    kubernetes.io/name: monitoring-influxdb

  name: monitoring-influxdb

  namespace: kube-system

spec:

  ports:

  - port:

    targetPort:

  selector:

    k8s-app: influxdb

[root@localhost monitor]# kubectl apply -f .

deployment.extensions/monitoring-grafana unchanged

service/monitoring-grafana unchanged

serviceaccount/heapster unchanged

clusterrolebinding.rbac.authorization.k8s.io/heapster unchanged

deployment.extensions/heapster unchanged

service/heapster unchanged

deployment.extensions/monitoring-influxdb unchanged

service/monitoring-influxdb unchanged

查看

[root@localhost monitor]# kubectl get pod,svc,deploy -n kube-system -o wide

NAME                                        READY   STATUS    RESTARTS   AGE     IP             NODE            NOMINATED NODE   READINESS GATES

pod/coredns-5b8c57999b-z9jh8                /     Running             22h     172.17.52.3    192.168.0.220   <none>           <none>

pod/heapster-77f96f6f6c-qcr98               /     Running             14m     172.17.52.2    192.168.0.220   <none>           <none>

pod/kubernetes-dashboard-644c96f9c6-bvw8w   /     Running             23h     172.17.100.2   192.168.0.222   <none>           <none>

pod/monitoring-grafana--cb86b     /     Running             8m55s   172.17.100.5   192.168.0.222   <none>           <none>

pod/monitoring-influxdb-58b849b9f8-t26p8    /     Running             8m52s   172.17.50.4    192.168.0.221   <none>           <none>

NAME                           TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)         AGE   SELECTOR

service/heapster               ClusterIP   10.0.0.208   <none>        /TCP          14m   k8s-app=heapster

service/kube-dns               ClusterIP   10.0.0.2     <none>        /UDP,/TCP   23h   k8s-app=kube-dns

service/kubernetes-dashboard   NodePort    10.0.0.84    <none>        :/TCP   23h   k8s-app=kubernetes-dashboard

service/monitoring-grafana     NodePort    10.0.0.252   <none>        :/TCP    14m   k8s-app=grafana

service/monitoring-influxdb    ClusterIP   10.0.0.85    <none>        /TCP        14m   k8s-app=influxdb

访问grafana：http://192.168.0.222:35811

导入图表

巴特西

kubernetes监控-Heapster+InfluxDB+Grafana（十五）

部署heapster组件

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