Ever tried to send kill signal from one container to another in Kubernetes pod? There is solution.
Just specify killinit --listen /mnt/kill -- original command as entrypoint
for container which original command should receive kill signal you want to
send.
Mount shared directory in both containers as described there: 1
Send kill signal from second container by writing kill signal name into /mnt/kill:
echo HUP > /mnt/kill