kubernetes学习记录(10)——建立Heapster+Influxdb+Grafana集群性能监控平台
来源:互联网 发布:java 多个泛型 编辑:程序博客网 时间:2024/05/22 18:02
采用的是Heapster+Influxdb+Grafana建立集群性能监控平台。
据说Heapster需要与Kubernetes Master进行安全连接,所以需要对集群进行安全认证,我的集群环境已经进行了安全认证。
非安全认证的集群能否使用Heapster,我没有验证。
集群的安全认证可以参考我的博客kubernetes学习记录(9)——集群基于CA签名的安全设置(可能有坑,这块还没研究的特别明白,网上的各种认证方式都有,我是综合参考的,不一定完美)
参考博客Kubernetes heapster监控插件安装文档与在开启TLS的Kubernetes1.6集群上安装heapster进行整理。
从作者分享的地址下载所需的镜像文件,Push到自己的本地镜像仓库中。
index.tenxcloud.com/jimmy/heapster-amd64:v1.3.0-beta.1index.tenxcloud.com/jimmy/heapster-influxdb-amd64:v1.1.1index.tenxcloud.com/jimmy/heapster-grafana-amd64:v4.0.2
yaml源码来源自kubernetes GitHub。
安装Heapster
heapster-deployment.yaml
修改- --source为自己的master apiserver访问地址
修改image地址
apiVersion: extensions/v1beta1kind: Deploymentmetadata: name: heapster namespace: kube-systemspec: replicas: 1 template: metadata: labels: task: monitoring k8s-app: heapster spec: containers: - name: heapster image: 192.168.121.140:5000/heapster-amd64 imagePullPolicy: IfNotPresent command: - /heapster - --source=kubernetes:http://192.168.121.143:8080 - --sink=influxdb:http://monitoring-influxdb:8086 - --metric_resolution=60s
heapster-service.yaml
apiVersion: v1kind: Servicemetadata: labels: task: monitoring # For use as a Cluster add-on (https://github.com/kubernetes/kubernetes/tree/master/cluster/addons) # If you are NOT using this as an addon, you should comment out this line. kubernetes.io/cluster-service: 'true' kubernetes.io/name: Heapster name: heapster namespace: kube-systemspec: ports: - port: 80 targetPort: 8082 selector: k8s-app: heapster
创建deployment和service
#kubectl create -f heapster-deployment.yaml#kubectl create -f heapster-service.yaml
安装Influxdb
influxdb 官方建议使用命令行或 HTTP API 接口来查询数据库,从 v1.1.0 版本开始默认关闭 admin UI,将在后续版本中移除 admin UI 插件。
开启镜像中 admin UI的办法如下:先导出镜像中的 influxdb 配置文件,开启插件后,再将配置文件内容写入 ConfigMap,最后挂载到镜像中,达到覆盖原始配置的目的。
$ #在镜像所在的宿主机上,导出镜像中的influxdb配置文件$ docker run --rm --entrypoint 'cat' -ti heapster-influxdb-amd64:v1.1.1 /etc/config.toml >config.toml.orig$ cp config.toml.orig config.toml$ # 修改:启用 admin 接口$ vim config.toml修改第35行< enabled = false---> enabled = true$ #将修改后的config.toml拷贝到Master上,再将修改后的配置写入到ConfigMap对象中$ kubectl create configmap influxdb-config --from-file=config.toml -n kube-system$ # 将ConfigMap中的配置文件挂载到Pod中,达到覆盖原始配置的目的
最终的influxdb-deployment.yaml文件如下:
apiVersion: extensions/v1beta1kind: Deploymentmetadata: name: monitoring-influxdb namespace: kube-systemspec: replicas: 1 template: metadata: labels: task: monitoring k8s-app: influxdb spec: containers: - name: influxdb image: 192.168.121.140:5000/heapster-influxdb-amd64 volumeMounts: - mountPath: /data name: influxdb-storage - mountPath: /etc/ name: influxdb-config volumes: - name: influxdb-config configMap: name: influxdb-config - name: influxdb-storage emptyDir: {}
influxdb-service.yaml
apiVersion: v1kind: Servicemetadata: labels: task: monitoring # For use as a Cluster add-on (https://github.com/kubernetes/kubernetes/tree/master/cluster/addons) # If you are NOT using this as an addon, you should comment out this line. kubernetes.io/cluster-service: 'true' kubernetes.io/name: monitoring-influxdb name: monitoring-influxdb namespace: kube-systemspec: type: NodePort ports: - port: 8086 targetPort: 8086 name: http - port: 8083 targetPort: 8083 name: api selector: k8s-app: influxdb
创建deployment和service
#kubectl create -f influxdb-deployment.yaml#kubectl create -f influxdb-service.yaml
安装grafana
grafana-deployment.yaml
修改GF_SERVER_ROOT_URL的value
apiVersion: extensions/v1beta1kind: Deploymentmetadata: name: monitoring-grafana namespace: kube-systemspec: replicas: 1 template: metadata: labels: task: monitoring k8s-app: grafana spec: containers: - name: grafana image: 192.168.121.140:5000/heapster-grafana-amd64 ports: - containerPort: 3000 protocol: TCP volumeMounts: - mountPath: /var name: grafana-storage env: - name: INFLUXDB_HOST value: monitoring-influxdb - name: GRAFANA_PORT value: "3000" # The following env variables are required to make Grafana accessible via # the kubernetes api-server proxy. On production clusters, we recommend # removing these env variables, setup auth for grafana, and expose the grafana # service using a LoadBalancer or a public IP. - 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 # If you're only using the API Server proxy, set this value instead: value: /api/v1/proxy/namespaces/kube-system/services/monitoring-grafana/ #value: / volumes: - name: grafana-storage emptyDir: {}
grafana-service.yaml
apiVersion: v1kind: Servicemetadata: labels: # For use as a Cluster add-on (https://github.com/kubernetes/kubernetes/tree/master/cluster/addons) # If you are NOT using this as an addon, you should comment out this line. kubernetes.io/cluster-service: 'true' kubernetes.io/name: monitoring-grafana name: monitoring-grafana namespace: kube-systemspec: # In a production setup, we recommend accessing Grafana through an external Loadbalancer # or through a public IP. # type: LoadBalancer # You could also use NodePort to expose the service at a randomly-generated port # type: NodePort ports: - port: 80 targetPort: 3000 selector: k8s-app: grafana
创建deployment和service
#kubectl create -f grafana-deployment.yaml#kubectl create -f grafana-service.yaml
访问验证
验证Heapster
访问kubernets dashboard (masterIP:8080/ui)界面,看是显示各 Nodes、Pods 的 CPU、内存、负载等利用率曲线图。
验证Influxdb
获取 influxdb http 8086 映射的 NodePort
#kubectl get svc -n kube-system|grep influxdb
8086对应的端口是32450。
通过 kube-apiserver 的非安全端口访问 influxdb 的 admin UI 界面:
http://masterIP:8080/api/v1/proxy/namespaces/kube-system/services/monitoring-influxdb:8083/
Host 中输入 Influxdb pod所在的node IP, Port 中输入 8086 映射的 nodePort 如上面的 32450,点击 “Save” 即可
回车
验证Grafana
获取 grafana 服务 URL
#kubectl cluster-info
我的集群安全认证还有一些小细节上的问题,这里不应该显示localhost的。
替换成MasterIP。
grafana 服务 URL:
http://192.168.121.143:8080/api/v1/proxy/namespaces/kube-system/services/monitoring-grafana
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