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 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 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/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

巴特西

python之supervisord启动脚本

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