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Pythonスクリプトをサービスで起動させる

Posted at

ほぼ、Getting a Python script to run in the background (as a service) on bootのまま。

pythonスクリプトの作成

たとえば、ここでは/usr/bin/local/test/test.pyをサービスで起動したと仮定する。

Deamon Spcriptの作成

ひな形

下記のスクリプトをmyservice.shとして/usr/local/bin/testに作成する。

myservice.sh
#!/bin/sh

### BEGIN INIT INFO
# Provides:          myservice
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Put a short description of the service here
# Description:       Put a long description of the service here
### END INIT INFO

# Change the next 3 lines to suit where you install your script and what you want to call it
DIR=/usr/local/bin/myservice
DAEMON=$DIR/myservice.py
DAEMON_NAME=myservice

# Add any command line options for your daemon here
DAEMON_OPTS=""

# This next line determines what user the script runs as.
# Root generally not recommended but necessary if you are using the Raspberry Pi GPIO from Python.
DAEMON_USER=root

# The process ID of the script when it runs is stored here:
PIDFILE=/var/run/$DAEMON_NAME.pid

. /lib/lsb/init-functions

do_start () {
    log_daemon_msg "Starting system $DAEMON_NAME daemon"
    start-stop-daemon --start --background --pidfile $PIDFILE --make-pidfile --user $DAEMON_USER --chuid $DAEMON_USER --startas $DAEMON -- $DAEMON_OPTS
    log_end_msg $?
}
do_stop () {
    log_daemon_msg "Stopping system $DAEMON_NAME daemon"
    start-stop-daemon --stop --pidfile $PIDFILE --retry 10
    log_end_msg $?
}

case "$1" in

    start|stop)
        do_${1}
        ;;

    restart|reload|force-reload)
        do_stop
        do_start
        ;;

    status)
        status_of_proc "$DAEMON_NAME" "$DAEMON" && exit 0 || exit $?
        ;;
    *)
        echo "Usage: /etc/init.d/$DAEMON_NAME {start|stop|restart|status}"
        exit 1
        ;;

esac
exit 0

スクリプトの編集

pythonスクリプトの保存場所に合わせて、下記の内容を編集。

DIR=/usr/local/bin/myservice
DAEMON=$DIR/myservice.py
DAEMON_NAME=myservice

たとえば、/usr/local/bin/test/test.pyをデーモン化させる場合は、次のように編集すればいい。

DIR=/usr/local/bin/test
DAEMON=$DIR/test.py
DAEMON_NAME=test

/etc/init.dへコピー

パーミッションなどを変更後、/etc/init.dへコピーする

cd /usr/local/bin/test
sudo chown root.root myservice.sh
sudo chmod 755 myservice.sh
sudo cp myservice.sh /etc/init.d/

Pythonスクリプトのパーミッション変更

pythonスクリプトも合わせてパーミッションを変更しておく

cd /usr/local/bin/test
sudo chmod 755 test.py

Serviceへの登録

デーモンスクリプトの動作確認

以下のコマンドで、動作確認しておく

sudo /etc/init.d/myservice.sh start
sudo /etc/init.d/myservice.sh status
sudo /etc/init.d/myservice.sh stop

サービスへの登録

以下のコマンドでサービスへ登録する

sudo update-rc.d myservice.sh defaults

サービスに登録できているかどうかは、下記のコマンドで確認できる

ls -l /etc/rc?.d/*myservice.sh
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