Simple Dockerfile and bash scripts for playing around with signals & docker

Dockerfile

FROM debian:jessie
MAINTAINER Koan Health <[email protected]>

ADD ./run.sh /usr/bin/
CMD ["run.sh"]

run.sh

#!/usr/bin/env bash

function graceful_exit {
  echo 'Got QUIT, I will actually exit in 5 seconds'
  sleep 5
  exit
}

# trap TERM and change to QUIT
trap "echo 'Got INT, <har har har>'" INT
trap "echo 'Got TERM, <har har har>'" TERM
trap graceful_exit QUIT

echo "Traps set, waiting for wabbits..."

while true
  do 
	echo 'I laugh at your other signals, send QUIT to Stop'
	sleep 2
  done

shell_commands.sh

# Laugh at my signal
docker kill --signal=INT $(docker ps | grep run\.sh | awk '{print $1}')

# send the quit signal and wait for the container to exit
docker kill -s QUIT $(docker ps | grep run\.sh | awk '{print $1}') && docker wait $(docker ps | grep run\.sh | awk '{print $1}')