supervisord 最新的安装心得

Linux系统下 Supervisor 安装搭建

在 web 应用部署到线上后，需要保证应用一直处于运行状态，在遇到程序异常、报错等情况，导致 web 应用终止时，需要保证程序可以立刻重启，继续提供服务。

所以，就需要一个工具，时刻监控 web 应用的运行情况，管理该进程。

Supervisor 就是解决这种需求的工具，可以保证程序崩溃后，重新把程序启动起来等功能。

Supervisor 是一个用 Python 写的进程管理工具，可以很方便的用来在 UNIX-like 系统（不支持 Windows）下启动、重启（自动重启程序）、关闭进程（不仅仅是 Python 进程）.

一、 安装supervisor

# yum install python-setuptools

# easy_install pip

# pip install supervisor  -- 或者-- easy_install supervisor

# mkdir /etc/supervisor/

安装完成之后，在/etc/supervisor目录下生成配置文件

# echo_supervisord_conf>/etc/supervisor/supervisord.conf

卸载：

如果需要卸载supervisor

执行 #  pip uninstall supervisor

或者

yum remove supervisord

修改supervisor配置文件： vi /etc/supervisor/supervisord.conf

把末尾的include去掉；添加配置文件

[include]
files = /etc/supervisor/conf.d/*.ini  #(注意空格)

conf.d文件夹中的app_admin.ini配置文件如下

[root@centos]# vim appadmin.ini 
 [program:appadmin]
 process_name=%(program_name)s_%(process_num)02d
 command=php think queue:listen --queue CancelOrderJobQueue //执行一个自动关闭订单的队列
 directory=/usr/share/nginx/html/dev/new_api     ##程序的目录地址最好要添加，要不然会报错，找不到路径
 autostart=true
 autorestart=true
 user=root
 numprocs=1
 redirect_stderr=true
 stdout_logfile=/etc/supervisor/logs/appadmin.log  #日志文件 如果成功会看见.log文件

一切准备完毕后 执行

supervisord -c /etc/supervisor/supervisord.conf

启动supervisor，即可完成程序的持续运行！

运行 supervisorctl命令即可查看程序的运行状态

一些supervisor的常用命令

1 进入supervisor 命令-->  #supervisorctl
2 查看命令           -->  #help
3 重载项目           -->  #reload
4 查看状态           -->  #status

二、设置supervisor开机自起：

重启服务器后，发现supervisor开机启动，于是只好手动添加脚本 实现开机启动

Supervisor设置开机启动有很多，这里以Centos为例，仅供参考！

编辑sh文件并给予权限

vim /etc/init.d/supervisord

张贴：

#!/bin/bash

#
# supervisord   This scripts turns supervisord on
#
# Author:       Mike McGrath <mmcgrath@redhat.com> (based off yumupdatesd)
#               Jason Koppe <jkoppe@indeed.com> adjusted to read sysconfig,
#                   use supervisord tools to start/stop, conditionally wait
#                   for child processes to shutdown, and startup later
#               Mikhail Mingalev <mingalevme@gmail.com> Merged
#                   redhat-init-jkoppe and redhat-sysconfig-jkoppe, and
#                   made the script "simple customizable".
#               Brendan Maguire <maguire.brendan@gmail.com> Added OPTIONS to
#                   SUPERVISORCTL status call
#
# 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.
#               Script was originally written by Jason Koppe <jkoppe@indeed.com>.
#
 
. /etc/rc.d/init.d/functions

set -a

PREFIX=/usr

SUPERVISORD=$PREFIX/bin/supervisord
SUPERVISORCTL=$PREFIX/bin/supervisorctl

PIDFILE=/tmp/supervisord.pid
LOCKFILE=/var/lock/subsys/supervisord

OPTIONS="-c /etc/supervisor/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
 

保存后就可以添加至服务并设置开机启动啦。

chkconfig --add supervisord
chkconfig supervisord --level 345 on

启动、关闭、重启supervisord 命令

service supervisord start
service supervisord stop
service supervisord restart

 

参考地址：

https://segmentfault.com/a/1190000016012646