Attach into JVM using Golang and Dynamic Attach API

The demo shows how to attach to running JVM process by using Dynamic Attach API and Golang.

How it works

tl;dr:

• check user permissions
• create "attach file"
• send SIGQUIT to the target JVM
• send the command to the socket

I suggest going trough dunamic_attach.go#executeCommand method to see what's inside.

Demo

Just run docker-compose up and observe the output carefully.

See also blogpost describing what one could do using techniques presented here.