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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/functionsset -aPREFIX=/usr/localSUPERVISORD=$PREFIX/bin/supervisordSUPERVISORCTL=$PREFIX/bin/supervisorctlPIDFILE=/var/supervisor/supervisord.pidLOCKFILE=/var/supervisor/supervisord.lockOPTIONS="-c /etc/supervisord.conf"# unset this variable if you don‘t care to wait for child processes to shutdown before removing the $LOCKFILE-lockWAIT_FOR_SUBPROCESSES=yes# remove this if you manage number of open files in some other fashionulimit -n 96000RETVAL=0running_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 in  2 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 1esacexit $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/supervisord  start

 这样,supervisor就启动了。

3. 配置开机启动

执行以下命令:

chkconfig supervisord  on

 可以以下命令查看是否成功

chkconfig --list | grep  supervisord 

python之supervisord启动脚本