老问题了，但这个问题很有用：

#!/bin/bash

echo starting up

exec /opt/myapp

详情请看这里：https://akomljen.com/stopping-docker-containers-gracefully/

看看this，可能会很有启发性：-）

• • 更新日期：**

@nick-humrich在这里，这是我的蹩脚副本和过去（信贷去原作者https://github.com/lgierth）

#!/bin/bash

function ensure_started_container {
  exists=`docker ps -q | grep $1`
  if [ "$?" = "0" ] ; then
    echo "[docker-exec] skipping docker start, already started"
  else
    output=`docker start "$1"`
    echo "[docker start] $output"
  fi
  running=1
}

function setup_signals {
  cid="$1"; shift
  handler="$1"; shift
  for sig; do
    trap "$handler '$cid' '$sig'" "$sig"
  done
}

function handle_signal {
  echo "[docker-exec] received $2"
  case "$2" in
    SIGINT)
      output=`docker stop -t 5 "$1"`
      echo "[docker stop] $output"
      running=0
      ;;
    SIGTERM)
      output=`docker stop -t 5 "$1"`
      echo "[docker stop] $output"
      running=0
      ;;
    SIGHUP)
      output=`docker restart -t 5 "$1"`
      echo "[docker restart] $output"

      # restart logging
      docker attach "$1" &
      kill "$logger_pid" 2> /dev/null
      logger_pid="$!"
      ;;
  esac
}

running=0

setup_signals "$1" "handle_signal" SIGINT SIGTERM SIGHUP

ensure_started_container "$1"

docker attach "$1" &
logger_pid="$!"

while true; do
  if [ "$running" = "1" ]; then
    sleep 1
  else
    break
  fi
done

exit_code=`docker wait "$1"`
exit "$exit_code"

从Docker 1.9开始，您可以在Dockerfile中使用STOPSIGNAL指令：

STOPSIGNAL signal

STOPSIGNAL设置将发送到容器以退出的系统调用信号。该信号可以是与内核的syscall表中的位置匹配的有效无符号数字，例如9，或者是SIGNAME格式的信号名称，例如SIGKILL。
图片来源：https://docs.docker.com/engine/reference/builder/#stopsignal

在我的例子中，简单地设置一个陷阱是不起作用的，我必须将进程设置为后台来捕捉信号，否则信号会传到启动的进程本身。
起始脚本的最后一行是：

sudo -H -u "$uid" sh -c "myserviced"

我用下面的代码替换了这一行：

shutdown_myservice() {
  set +e
  echo "[SHUTDOWN] Shutting down myservice"
  sudo -u "$uid" myservicecmd -c Shutdown
  echo "[SHUTDOWN] sent. $?"
  wait $dpid  # make sure the process terminated and not just started stopping
  echo "[SHUTDOWN] down. $?"
  return 0
}

trap "shutdown_myservice" HUP INT QUIT TERM USR1

# here, start the process in BACKGROUND
sudo -H -u "$uid" sh -c "myserviced" &
dpid=$!
wait $dpid

这样，“焦点”就不在守护进程上了。相反，它在启动脚本上。我看起来只有“焦点”进程（前台进程）才能得到信号。