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 


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