Prometheus监控Tomcat

原文：https://mp.weixin.qq.com/s/vFNFy3IyfpkJLUy9hISaVQ

（1）制作tomcat镜像，按如下步骤

mkdir /root/tomcat_image

把上面的war包和jar包传到这个目录下

cat Dockerfile

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FROM tomcat ADD metrics.war /usr/local/tomcat/webapps/ ADD simpleclient-0.8.0.jar  /usr/local/tomcat/lib/ ADD simpleclient_common-0.8.0.jar /usr/local/tomcat/lib/ ADD simpleclient_hotspot-0.8.0.jar /usr/local/tomcat/lib/ ADD simpleclient_servlet-0.8.0.jar /usr/local/tomcat/lib/ ADD tomcat_exporter_client-0.0.12.jar /usr/local/tomcat/lib/docker build -t='xianchao/tomcat_prometheus:v1' .

 docker login

username：xianchao

password：1989317**

docker push xianchao/tomcat_prometheus:v1 

#上传镜像到hub仓库

docker pull xianchao/tomcat_prometheus:v1  

#在k8s的node节点拉取镜像

（2）基于上面的镜像创建一个tomcat实例

cat deploy.yaml

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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'     spec:       containers:       - name: tomcat         image: xianchao/tomcat_prometheus:v1         ports:         - containerPort: 8080         securityContext:           privileged: truekubectl apply -f deploy.yaml

 （3）创建一个service，可操作也可不操作

cat tomcat-service.yaml

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kind: Service  #service 类型 apiVersion: v1 metadata: #  annotations: #    prometheus.io/scrape: 'true'   name: tomcat-service spec:   selector:     app: tomcat   ports:   - nodePort: 31360     port: 80     protocol: TCP     targetPort: 8080   type: NodePortkubectl apply -f tomcat-service.yaml