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supervisor的安装详解,包括centos6.X 和centos7.x
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- 时间:2018-12-26 11:32:12
- 分类:Linux
supervisor很牛逼的进程守护软件,是通过fork/exec的方式将这些被管理的进程当作supervisor的子进程来启动,所以我们只需要将要管理的进程的可执行文件的路径添加到supervisor的配置文件中就好了。此时被管理进程被视为supervisor的子进程,苦该子进程异常中断,则父进程可以准确获取子进程异常中断的信息,通过在配置文件中设置autostart=true,可以实现对异常的子进程自动重启。
centos6.X安装方法
supervisor安装过程
supervisor是基于python开发的,安装supervisor前,需要先安装python,supervisor可以通过pip或者easy_install安装
通过easy_install安装
yum install python-setuptools easy_install supervisor
或者通过pip安装
pip install supervisor
安装完执行以下命令
echo_supervisord_conf > /etc/supervisord.conf
3.设置开机自动启动的方法
3.1最简单的方法就是直接把启动命令放在/etc/rc.d/rc.local里。这里我们不讨论这个,我们利用init.d的服务来管理。
首先创建脚本文件vi /etc/init.d/supervisord脚本文件,内容如下:
#!/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 $RETVAL
注意上面的变量根据自己的实际情况修改
PREFIX=/usr/local
SUPERVISORD=$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
chmod 777 /etc/init.d/supervisord
这样我们以后就可以用service supervisord start 启动了。
配置开机启动
chkconfig supervisord on
可以通过以下命令查看是否成功
chkconfig --list|grep supervisord
centos7.X安装方法
直接yum命令来安装
# sudo su - #切换为root用户 # yum install epel-release # yum install -y supervisor # systemctl enable supervisord # 开机自启动 # systemctl start supervisord # 启动supervisord服务 # systemctl status supervisord # 查看supervisord服务状态 # ps -ef|grep supervisord # 查看是否存在supervisord进程
因为7里面有systemctl来管理,所以就省事多了。当然如果你手动安装的那么需要自己建立配置服务文件
vi /usr/lib/systemd/system/supervisord.service
内容如下:
[Unit] Description=Supervisor daemon [Service] Type=forking PIDFile=/var/run/supervisord.pid ExecStart=/bin/supervisord -c /etc/supervisord.conf ExecStop=/bin/supervisorctl shutdown ExecReload=/bin/supervisorctl reload KillMode=process Restart=on-failure RestartSec=42s [Install] WantedBy=multi-user.target
好了,安装的所有问题就差不多了。下节祥哥讲配置
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