How to disable core file dumps in docker container
You have to start your container with the option --ulimit core=0 to disable coredumps.
Reference: https://docs.docker.com/engine/reference/commandline/run/#set-ulimits-in-container---ulimit
Example
On the host, temporarily set the coredump path to /tmp for verification:
echo '/tmp/core.%e.%p' | sudo tee /proc/sys/kernel/core_patternStart a container as usual and force a core dump:
docker run --rm -it bash(inside the container)# yes > /dev/null &# kill -SIGABRT $(pidof yes)# ls /tmp(shows core.yes.<pid>)Now, with --ulimit core=0:
docker run --ulimit core=0 --rm -it bash(inside the container)# yes > /dev/null &# kill -SIGABRT $(pidof yes)# ls /tmp(No entries)
i have this problem too on the docker swarm service and --ulimit core=0 does not work in swarm service i used below command and worked for me in docker swarm service!
sysctl -w kernel.core_pattern=/dev/null
For those using docker-compose, in the .yml file set ulimits:
services: app: ulimits: core: hard: 0 soft: 0