How to enable Apache Tomcat monitoring in Datadog Agent

Datadog is a monitoring service for cloud-scale applications that brings events and metrics from servers, databases, applications, tools and services to present a unified view of the infrastructure, which help them to work collaboratively on the infrastructure to avoid latency, resolve performance problems, and ensure that development and deployment cycles finish on time.

Apache Tomcat Integratoion with Datadog collects Following Tomcat metrics

Overall activity metrics: error count, request count, processing times, etc.
Thread pool metrics: thread count, number of threads busy, etc.
Servlet processing times

Step 1 – Sign up for a Datadog Account

Go to : https://www.datadoghq.com/

Click on Free Trial

Fill the form to sign up

Next: Select your Stack. You can select Tomcat for now

Step 2: Install the datadog Agent on your Tomcat Server

Select your OS: Ubuntu

Then copy the command in the box: Use our easy one step install

Log into your Tomcat server and paste and run the command to install datadog agent

DD_AGENT_MAJOR_VERSION=7 DD_API_KEY=4cf1ee64a11f9c21c2020b85376e552c DD_SITE="datadoghq.com" bash -c "$(curl -L https://s3.amazonaws.com/dd-agent/scripts/install_script.sh)"

How to enable JMX Remote in Tomcat 8 to Monitor & Administer?

Modify catalina.sh file by adding the below lines

$ sudo vi /usr/share/tomcat8/bin/catalina.sh





CATALINA_OPTS="-Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=9012 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false"

Save: wq!

Restart the process

$ cd /usr/share/tomcat8/bin/

$ ./shutdown.sh


$ ./startup.sh

Reference

https://tomcat.apache.org/tomcat-8.0-doc/monitoring.html#Enabling_JMX_Remote

How to configure and enable Tomcat intergration in Datadog agent?

$ cd /etc/datadog-agent/conf.d/tomcat.d/
$ cp conf.yaml.example conf.yaml
$ datadog-agent configcheck
$ systemctl restart datadog-agent
$ systemctl status datadog-agent
$ datadog-agent config

Next Go to your Datadog account: Integrations