How to configure Tomcat Exporter to scrape metrics from Prometheus?
To setup exporter, follow the steps given below:
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Install a standalone Tomcat-sever or as a container as kubernetes cluster.
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Download the Tomcat exporter servlet file in .war format from here.
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Rename the file as metrics.war and deploy it in the webapps directory inside the tomcat installation directory.
If Tomcat-server is deployed as a container, use the 'docker cp' commands to copy files as shown below,
docker cp metrics.war <TOMCAT_CONTAINER_ID>:/usr/local/tomcat/webapps/metrics.war
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Download the following jars:
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Copy all jars to $CATALINA_BASE/lib directory.
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Restart the tomcat server and access http://host:port/metrics link to verify if exporter is working correctly.
To configure, follow the steps given below:
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Open prometheus configuration file under prometheus deployed directory. (Default config file is prometheus.yml)
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Under the scrape configs, add the job and exporter as shown below: (To know more about scrape configuration, click here.)
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Now restart Prometheus server.
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Query some tomcat metrics to verify if Prometheus can scrape metrics through the exporter.
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