python之supervisord启动脚本
Supervisord 是用Python实现的一款非常实用的进程管理工具，在批量服务化管理时特别有效。可以将非Daemon的应用转为daemon程序。关于supervisord的安装和配置，在网上已经有很多现成的帖子，我这里就不重复了。在centos和rhel的环境下，我们一般是用chkconfig来管理服务的启动停止、开机自启动等。下面我列出Supervisord的服务脚本。
1. 执行如下命令：
vim /etc/init.d/supervisord
2.输入如下内容：
注意：该文件中的如下几个变量，都需要根据你实际的目录来改写。
PREFIX=/usr/local
SUPERVISORD=$PREFIX/bin/supervisord ##supervisord 程序的安装路径
SUPERVISORCTL=$PREFIX/bin/supervisorctl##supervisorctl 程序的安装路径
PIDFILE=/var/supervisor/supervisord.pid ##需要先创建/var/supervisor目录
LOCKFILE=/var/supervisor/supervisord.lock
OPTIONS="-c /etc/supervisord.conf" ##配置文件的路径
#!/bin/bash
#
# supervisord This scripts turns supervisord on
# chkconfig:345 83 04
# description:supervisor is a process control utility.It has a web based
# xmlrpc interface as well as a few other nifty features.
#
# source function library
. /etc/rc.d/init.d/functions
set -a
PREFIX=/usr/local
SUPERVISORD=$PREFIX/bin/supervisord
SUPERVISORCTL=$PREFIX/bin/supervisorctl
PIDFILE=/var/supervisor/supervisord.pid
LOCKFILE=/var/supervisor/supervisord.lock
OPTIONS="-c /etc/supervisord.conf"
# unset this variable if you don't care to wait for child processes to shutdown before removing the $LOCKFILE-lock
WAIT_FOR_SUBPROCESSES=yes
# remove this if you manage number of open files in some other fashion
ulimit -n 96000
RETVAL=0
running_pid()
{
# Check if a given process pid's cmdline matches a given name
pid=$1
name=$2
[ -z "$pid" ] && return 1
[ ! -d /proc/$pid ] && return 1
(cat /proc/$pid/cmdline | tr "\000" "\n"|grep -q $name) || return 1
return 0
}
running()
{
# Check if the process is running looking at /proc
# (works for all users)
# No pidfile, probably no daemon present
[ ! -f "$PIDFILE" ] && return 1
# Obtain the pid and check it against the binary name
pid=`cat $PIDFILE`
running_pid $pid $SUPERVISORD || return 1
return 0
}
start() {
echo "Starting supervisord: "
if [ -e $PIDFILE ]; then
echo "ALREADY STARTED"
return 1
fi
# start supervisord with options from sysconfig (stuff like -c)
$SUPERVISORD $OPTIONS
# show initial startup status
$SUPERVISORCTL $OPTIONS status
# only create the subsyslock if we created the PIDFILE
[ -e $PIDFILE ] && touch $LOCKFILE
}
stop() {
echo -n "Stopping supervisord: "
$SUPERVISORCTL $OPTIONS shutdown
if [ -n "$WAIT_FOR_SUBPROCESSES" ]; then
echo "Waiting roughly 60 seconds for $PIDFILE to be removed after child processes exit"
for sleep in2 2 2 2 4 4 4 4 8 8 8 8 last; do
if [ ! -e $PIDFILE ] ; then
echo "Supervisord exited as expected in under $total_sleep seconds"
break
else
if [[ $sleep -eq "last" ]] ; then
echo "Supervisord still working on shutting down. We've waited roughly 60 seconds, we'll let it do its thing from here"
return 1
else
sleep $sleep
total_sleep=$(( $total_sleep + $sleep ))
fi
fi
done
fi
# always remove the subsys. We might have waited a while, but just remove it at this point.
rm -f $LOCKFILE
}
restart() {
stop
start
}
case "$1" in
start)
start
RETVAL=$?
;;
stop)
stop
RETVAL=$?
;;
restart|force-reload)
restart
RETVAL=$?
;;
reload)
$SUPERVISORCTL $OPTIONS reload
RETVAL=$?
;;
condrestart)
[ -f $LOCKFILE ] && restart
RETVAL=$?
;;
status)
$SUPERVISORCTL $OPTIONS status
if running ; then
RETVAL=0
else
RETVAL=1
fi
;;
*)
echo $"Usage: $0 {start|stop|status|restart|reload|force-reload|condrestart}"
exit 1
esac
exit $RETVAL
保存完毕之后，可以执行以下命令修改文件权限：
chmod 777 /etc/init.d/supervisord
/etc/init.d/supervisordstart
这样，supervisor就启动了。
3. 配置开机启动
执行以下命令：
chkconfig supervisordon
可以以下命令查看是否成功
chkconfig --list | grepsupervisord
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