Start and terminate multiple sevices

entrypoint.sh

# ########################################
# Start server and manager in background

/start-server.sh &
SERVER_PID=$!

/start-manager.sh &
MANAGER_PID=$!

# ########################################
# Make sure child processes exit cleanly

ensure_clean_exit() {
  trap - SIGINT SIGTERM # clear the trap
  echo "Killing process $$ and all subprocesses"
  kill -- -$$
}

sigint_received() {
  echo "SIGINT received"
  ensure_clean_exit
}

sigterm_received() {
  echo "SIGTERM received"
  ensure_clean_exit
}

trap sigint_received SIGINT
trap sigterm_received SIGTERM

# ########################################
# Wait for manager or server to exit

wait -n
EXIT_STATUS=$?

# Whichever exited, kill the other one
if ! kill -0 $SERVER_PID 2> /dev/null; then
  echo "server (PID ${SERVER_PID}) exited with ${EXIT_STATUS}"
  echo "stopping manager (PID ${MANAGER_PID})"
  kill -- -$MANAGER_PID 2> /dev/null
elif ! kill -0 $MANAGER_PID 2> /dev/null; then
  echo "manager (PID ${MANAGER_PID}) exited with ${EXIT_STATUS}"
  echo "stopping server (PID ${SERVER_PID})"
  kill -- -$SERVER_PID 2> /dev/null
fi

echo "Exiting with status ${EXIT_STATUS}"
exit $EXIT_STATUS