以下是redis的upstart脚本。如何创建一个pid所以我使用monit进行监控?
#!upstart
description "Redis Server"
env USER=redis
start on startup
stop on shutdown
respawn
exec sudo -u $USER sh -c "/usr/local/bin/redis-server /etc/redis/redis.conf 2>&1 >> /var/log/redis/redis.log"
答案 0 :(得分:68)
如果您的计算机上有start-stop-daemon,我强烈建议您使用它来启动您的进程。 start-stop-daemon将处理以非特权用户身份启动进程而无需从sudo或su(recommended in the upstart cookbook)进行分析。它还内置了对pid文件管理的支持。例如:
<强> /etc/init/app_name.conf 强>
#!upstart
description "Redis Server"
env USER=redis
start on startup
stop on shutdown
respawn
exec start-stop-daemon --start --make-pidfile --pidfile /var/run/app_name.pid --chuid $USER --exec /usr/local/bin/redis-server /etc/redis/redis.conf >> /var/log/redis/redis.log 2>&1
或者,您可以使用post-start script
节创建pid文件并使用post-stop script
节来手动管理pid文件以将其删除。例如:
<强> /etc/init/app_name.conf 强>
#!upstart
description "Redis Server"
env USER=redis
start on startup
stop on shutdown
respawn
exec sudo -u $USER sh -c "/usr/local/bin/redis-server /etc/redis/redis.conf 2>&1 >> /var/log/redis/redis.log"
post-start script
PID=`status app_name | egrep -oi '([0-9]+)$' | head -n1`
echo $PID > /var/run/app_name.pid
end script
post-stop script
rm -f /var/run/app_name.pid
end script
答案 1 :(得分:21)
Egg的第一个使用start-stop-daemon的例子是可行的。
如果你选择第二,我会建议$$来获得PID。
#!upstart
description "Redis Server"
env USER=redis
start on startup
stop on shutdown
respawn
script
echo $$ > /var/run/app_name.pid
exec sudo -u $USER sh -c "/usr/local/bin/redis-server /etc/redis/redis.conf 2>&1 >> /var/log/redis/redis.log"
end script
post-stop script
rm -f /var/run/app_name.pid
end script