Prometheus监控tomcat

date: 2020-10-08title: Prometheus监控tomcat #标题
tags: 监控 #标签
categories: 监控 # 分类

记录Prometheus监控tomcat，参考项目：github

制作tomcat镜像

先从github或我的网盘下载（提取码：ubcx ）相关jar包及war包，然后上传至服务器。

$ mkdir tomcat/ && cd tomcat/
$ cat > Dockerfile << EOF
FROM tomcat
ADD simpleclient_common-0.9.0.jar /usr/local/tomcat/lib/
ADD simpleclient_servlet-0.9.0.jar /usr/local/tomcat/lib/
ADD simpleclient-0.9.0.jar /usr/local/tomcat/lib/
ADD simpleclient_hotspot-0.9.0.jar /usr/local/tomcat/lib/
ADD tomcat_exporter_client-0.0.13.jar /usr/local/tomcat/lib/
ADD metrics.war /usr/local/tomcat/webapps/
EOF
docker build -t tomcat:latest .
# 待镜像生成后，自行导入到其他节点，或上传至你的私有镜像仓库。

运行tomcat容器

$ cat deploy.yaml    # 准备yaml文件
apiVersion: apps/v1
kind: Deployment
metadata:
  name: tomcat-deployment
  namespace: default
spec:
  selector: 
    matchLabels: 
     app: tomcat
  replicas: 2 # tells deployment to run 2 pods matching the template
  template: # create pods using pod definition in this template
    metadata:
      labels:
        app: tomcat
      annotations:
        prometheus.io/scrape: 'true'    # 必须有此字段，Prometheus才可以采集到
    spec:
      containers:
      - name: tomcat
        #image: xianchao/tomcat_prometheus:v1  如果你自己没做镜像，可以使用此镜像
        image: tomcat:latest
        imagePullPolicy: IfNotPresent
        ports:
        - containerPort: 8080
        securityContext: 
          privileged: true
---
# service可创建，也可不创建
kind: Service  
apiVersion: v1
metadata:
#  annotations:
#    prometheus.io/scrape: 'true'
  name: tomcat-service
spec:
  selector:
    app: tomcat
  ports:
  - nodePort: 31360
    port: 8080
    protocol: TCP
    targetPort: 8080
  type: NodePort
$ kubectl apply -f deploy.yaml   # 执行yaml文件
$ kubectl get pods        # 确认pod处于运行状态
NAME                                 READY   STATUS    RESTARTS   AGE
tomcat-deployment-5c4c9c79f7-8lfvk   1/1     Running   0          52s
tomcat-deployment-5c4c9c79f7-xb5gk   1/1     Running   0          52s

确认Prometheus已采集到tomcat运行数据