JMX - Example

Example of Monitoring pods on minishift with JMX.

Example application was developed in Spring Boot.
Minishift was used to test monitoring particular pods.

How to run the environment?

Before you start

• Install JAVA - we will need jconsole from java Java

• Install Docker
  Docker CE INSTALLATION

• Download minishift
  Installing minishft
  Minishift releases

• Set up virtualization environment for minishift
  Setting Up the Virtualization Environment

• Download oc tools
  oc tools

Start the environment

1. Build service:
   docker build . -t jmx-example
2. Run minishift:
   ./minishift start --show-libmachine-logs -v5
3. Configure minishift:
   oc login -u system:admin
./oc adm policy add-cluster-role-to-user cluster-admin admin
./oc create is test-image-stream -n myproject
4. Do port forwarding:
   oc login -u system:admin
oc project default oc get pods - check exact name of a pod with docker-registry in name
   oc port-forward docker-registry-1-zxsxx 8089:8089
5. Login to minishift docker registry with token from minishift console:
   • While starting minishift, there will be an url in logs to access minishift console
   • Login with admin username and any password
   • Click on right upper corner icon and chose Copy Login Command
   • Login command has been placed in clipboard, paste it in any text editor and extract token part from it
     docker login -u admin -p hp57zxkJ8jvxgtDMgDIXNDTCeBwlML_l_csut1eyYVk localhost:5000 - use that token in docker login command
6. Upload docker image:
   docker tag jmx-example localhost:5000/myproject/jmx-example
docker push localhost:5000/myproject/jmx-example
7. Use uploaded docker image:
   • Log in to minishift web console
   • Choose My Project project
   • Choose Deploy Image
   • In Image Stream Tag choose myproject then test and latest (if nothing can be selected in third box, just click on it and press enter), then click Deploy
8. Configure environment variables:
   - JAVA_OPTS: -Djava.rmi.server.hostname=localhost -Dcom.sun.management.jmxremote.port=8080 -Dcom.sun.management.jmxremote.rmi.port=8080 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false
9. Do port forwarding to the pod:
   oc get pods - get pod name
   oc port-forward test-4-zd42c 8080:8080 - use pod name for port forwarding
   - Open jconsole (from java directory)
   - Type localhost:8080 in remote address box

Completely reset minishift:
minishift delete --force --clear-cache
minishift stop