How to remotely monitor Java applications deployed on Tanzu Application Service for VMs with Java Management Extensions

Products

• VMware Tanzu Application Service for VMs

Issue/Introduction

This article applies to Tanzu Application Service for VMs (TAS for VMs) and provides instructions to enable Java Management Extensions (JMX) for Java applications running on TAS for VMs.

Resolution

1. Enable the JBP_CONFIG_JMX environment variable. This can be done by either:

• Editing application manifest, manifest.yml.
• Running the `cf set-env` command. 

This article focuses on how to edit the application manifest to enable the JBP_CONFIG_JMX environment variable.

---
applications:
- name: <APP_NAME>
 memory: 512M
 instances: 1
 path: path/java-app.war
 env:
   JBP_CONFIG_JMX: '{enabled: true}'

2. Use "cf push" to deploy the Java application to TAS for VMs.

3. Setup an SSH tunnel for JMX with command:

cf ssh -N -T -L 5000:localhost:5000 <APP_NAME>

Once the SSH tunnel has been created, JConsole should connect to localhost:5000 for JMX access. 
 

Note: These instructions are only useful in Diego-based containers with SSH access enabled.