multiple app nodes how to expose jmx in kubernetes?

Question

1. In kubernetes I can expose services with service. This is fine.
2. Lets say I have 1 web instance and 10 java server instances.
3. I

Answer 1

Adding to https://stackoverflow.com/a/39927197/1387184, I wanted to monitor all instances of the same pod at once, since we are hardcoding the port as 1099, it was difficult as I can do only one portforward to one pod with that port.

I used Shell Script to dynamically assign pod when running the docker

Dockerfile CMD /run.sh

run.sh

JMX_PORT=$(((RANDOM % 20)+1099))

echo "Running JMX on Port $JMX_PORT"

java ``eval echo $JAVA_OPTS`` ...

deployment.yml env: - name: JAVA_OPTS value: "-Xms256m -Xmx6144m -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.local.only=false -Dcom.sun.management.jmxremote.port=$JMX_PORT -Dcom.sun.management.jmxremote.rmi.port=$JMX_PORT -Djava.rmi.server.hostname=127.0.0.1"

the eval will evaluate the JMX_PORT to bash value, each pod when starts will likely to get different pod. I