I got my Go-based app to dump core on fatal errors inside docker but the core files are getting truncated. I have set my ulimit on core files to be unlimited (ulimit -c unlimited) on both on docker host and I passed setting into docker run command but again core files half the expected size of around 110MB instead of 260MB core tools like gdb and delve have trouble reading them.
docker run --ulimit core=-1 ...
I am getting core files, so I know GOTRACEBACK=crash and my kernel core_pattern setting is set correctly. I get proper cores when I run my app w/o docker.