Question

我在debet 8机器上的/etc/init.d中有这个docker sh服务脚本：

#!/bin/sh
set -e

### BEGIN INIT INFO
# Provides:           docker
# Required-Start:     $syslog $remote_fs
# Required-Stop:      $syslog $remote_fs
# Should-Start:       cgroupfs-mount cgroup-lite
# Should-Stop:        cgroupfs-mount cgroup-lite
# Default-Start:      2 3 4 5
# Default-Stop:       0 1 6
# Short-Description:  Create lightweight, portable, self-sufficient containers.
# Description:
#  Docker is an open-source project to easily create lightweight, portable,
#  self-sufficient containers from any application. The same container that a
#  developer builds and tests on a laptop can run at scale, in production, on
#  VMs, bare metal, OpenStack clusters, public clouds and more.
### END INIT INFO

export PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin

BASE=docker

# modify these in /etc/default/$BASE (/etc/default/docker)
DOCKER=/usr/bin/$BASE
# This is the pid file managed by docker itself
DOCKER_PIDFILE=/var/run/$BASE.pid
# This is the pid file created/managed by start-stop-daemon
DOCKER_SSD_PIDFILE=/var/run/$BASE-ssd.pid
DOCKER_LOGFILE=/var/log/$BASE.log
DOCKER_DESC="Docker"
DOCKER_OPTS="--insecure-registry 127.0.0.1:9000"

# Get lsb functions
. /lib/lsb/init-functions

if [ -f /etc/default/$BASE ]; then
    . /etc/default/$BASE
fi

# Check docker is present
if [ ! -x $DOCKER ]; then
    log_failure_msg "$DOCKER not present or not executable"
    exit 1
fi

check_init() {
     # see also init_is_upstart in /lib/lsb/init-functions (which isn't available in Ubuntu 12.04, or we'd use it directly)
     if [ -x /sbin/initctl ] && /sbin/initctl version 2>/dev/null | grep -q upstart; then        
                log_failure_msg "$DOCKER_DESC is managed via upstart, try using service $BASE $1"
                exit 1
         fi
}

fail_unless_root() {
    if [ "$(id -u)" != '0' ]; then
        log_failure_msg "$DOCKER_DESC must be run as root"
        exit 1
    fi
}

cgroupfs_mount() {
    # see also https://github.com/tianon/cgroupfs-mount/blob/master/cgroupfs-mount
    if grep -v '^#' /etc/fstab | grep -q cgroup \
        || [ ! -e /proc/cgroups ] \
        || [ ! -d /sys/fs/cgroup ]; then
        return
    fi
    if ! mountpoint -q /sys/fs/cgroup; then
        mount -t tmpfs -o uid=0,gid=0,mode=0755 cgroup /sys/fs/cgroup
    fi
    (
        cd /sys/fs/cgroup
        for sys in $(awk '!/^#/ { if ($4 == 1) print $1 }' /proc/cgroups); do
            mkdir -p $sys
            if ! mountpoint -q $sys; then
                if ! mount -n -t cgroup -o $sys cgroup $sys; then
                    rmdir $sys || true
                fi
            fi
        done
    )
}
echo -n "$1"

case "$1" in
    start)
        echo "start"
        check_init

        fail_unless_root

        cgroupfs_mount

        touch "$DOCKER_LOGFILE"
        chgrp docker "$DOCKER_LOGFILE"

        ulimit -n 1048576
        if [ "$BASH" ]; then
            ulimit -u 1048576
        else
            ulimit -p 1048576
        fi

        echo $DOCKER_OPTS
        log_begin_msg "Starting $DOCKER_DESC: $BASE"
        start-stop-daemon --start --background \
            --no-close \
            --exec "$DOCKER" \
            --pidfile "$DOCKER_SSD_PIDFILE" \
            --make-pidfile \
            -- \
                daemon -p "$DOCKER_PIDFILE" \
                $DOCKER_OPTS \
                    >> "$DOCKER_LOGFILE" 2>&1
        log_end_msg $?
        ;;

    stop)
        check_init
        fail_unless_root
        log_begin_msg "Stopping $DOCKER_DESC: $BASE"
        start-stop-daemon --stop --pidfile "$DOCKER_SSD_PIDFILE" --retry 10
        log_end_msg $?
        ;;

    restart)
        check_init
        fail_unless_root
        docker_pid=`cat "$DOCKER_SSD_PIDFILE" 2>/dev/null`
        [ -n "$docker_pid" ] \
            && ps -p $docker_pid > /dev/null 2>&1 \
            && $0 stop
        $0 start
        ;;

    force-reload)
        check_init
        fail_unless_root
        $0 restart
        ;;

    status)
        echo "Prova"
        check_init
        status_of_proc -p "$DOCKER_SSD_PIDFILE" "$DOCKER" "$DOCKER_DESC"
        echo "a"
        ;;
    statu)
                echo "Prova"
                check_init
                status_of_proc -p "$DOCKER_SSD_PIDFILE" "$DOCKER" "$DOCKER_DESC"
                echo "a"
                ;;
    *)
        echo "Usage: service docker {start|stop|restart|status} PIPPO"
        exit 1
        ;;
esac

这个问题是它没有将DOCKER_OPTS值传递给start部分的start-stop-daemon部分（或者至少它们不起作用，并且不会出现在结果进程的命令中） ps aux output）。

我们已经尝试将DOCKER_OPTS直接放在脚本中，并且在默认配置文件中读取它，但结果是相同的，选项没有任何效果。

如果我们尝试使用start-stop-daemon直接从终端启动具有相同选项的进程，它就可以正常工作。

这可能是什么原因？

另一方面，我们也尝试使用脚本，并发现了这种情况：

我们制作了名为statu的状态部分的副本，然后我们调用了booth，他们给了我们不同的结果。

状态：

● docker.service - Docker Application Container Engine
   Loaded: loaded (/lib/systemd/system/docker.service; enabled)
   Active: active (running) since Thu 2016-02-25 12:40:43 CET; 4min 35s ago
     Docs: https://docs.docker.com

statu： [FAIL [....] Docker没有运行......失败了！

作为代码一样，这是一个惊喜！为什么会这样？

Answer 1

Systemd不使用/etc/init.d中的脚本。从您的输出中，它使用/lib/systemd/system/docker.service中的包默认配置。如果您想进行更改：

# make a local copy, /lib/systemd can be overwritten on an application upgrade
cp /lib/systemd/system/docker.service /etc/systemd/system/docker.service

# edit /etc/systemd/system/docker.service

systemctl daemon-reload # updates systemd from files on the disk
systemctl restart docker # restart the service with your changes

Docker-sh服务脚本不采取选择

1 个答案: