python-supervisor进程管理启动多个进程(端口)
设定supervisor配置文件
创建默认的配置文件
echo_supervisord_conf >/etc/supervisord.conf
vi /etc/supervisord.conf
取消以下的注释,并修改IP为0.0.0.0
[inet_http_server] ; inet (TCP) server disabled by default
port=0.0.0.0:9001 ; (ip_address:port specifier, *:port for all iface)
username=user ; (default is no username (open server))
password=123 ; (default is no password (open server))
在/etc/supervisor/supervisord，用vim打开这个文件，在配置文件的屁股后面加上以下这一段
[program:web] command=python /var/www/site/Serv.py 80%(process_num)02d process_name=%(program_name)s_%(process_num)02d umask=022 startsecs=0 stopwaitsecs=0 redirect_stderr=true stdout_logfile=/tmp/codoon.log numprocs=4 numprocs_start=1
这个配置会启动4个Tornado的服务进程分别监听 8001,8002,8003,8004 这四个端口
command这一行是要执行的命令，这里是用 python /var/www/site/Serv.py 端口号来启动Tornado的服务进程 80%(process_num)02d 的用途是通过进程编号来生成端口号。下面的process_name这个参数也会用到。这里要指定的文件名就是上一步我们创建那个Serv.py文件
process_name是进程的名字，由于这里要启动4个进程，所以要用process_num来区分
umask是程序执行的权限参数
startsecs这个参数是程序启动的等待时间
stopwaitsecs这个参数是程序停止的等待时间
redirect_stderr这个参数将错误流重定向到std的流输出，这样可以省去一个日志文件的配置，当然也可以不用这个参数分开配置日志文件
stdout_logfile 这个参数是STD流输出日志文件的路径，Tornado会输出所有的请求和错误信息，通过这个可以统一做日志处理，分隔什么的，在程序里就只需要print到std流就行了。
numprocs 这个参数指定了进程的数量，这里是4，表明要启动4个Tornado进程
numprocs_start 这个参数指定了进程号的起始编号，这里是1，这样前面的command和process_name里的%(process_num)02d部分就会在执行的时候被替换为01~05的字符串
配置修改完成后:wq保存退出，执行：
supervisorctl reload
重新加载配置后，这些进程就启动起来了
使用Nginx代理
首先找到你的站点配置文件，打开后，在头上增加upstream的内容
upstream frontends {
server 127.0.0.1:8001;
server 127.0.0.1:8002;
server 127.0.0.1:8003;
server 127.0.0.1:8004;
}
再替换location的内容
location / {
proxy_pass_header Server;
proxy_set_header Host $http_host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Scheme $scheme;
proxy_pass http://frontends;
proxy_next_upstream error;
}
设定supervisor启动文件
vi /etc/init.d/supervisord
#!/bin/bash
#
# supervisord This scripts turns supervisord on
#
# Author: Mike McGrath <mmcgrath@redhat.com> (based off yumupdatesd)
# Jason Koppe <jkoppe@indeed.com> adjusted to read sysconfig,
# use supervisord tools to start/stop, conditionally wait
# for child processes to shutdown, and startup later
# Mikhail Mingalev <mingalevme@gmail.com> Merged
# redhat-init-jkoppe and redhat-sysconfig-jkoppe, and
# made the script "simple customizable".
#
# chkconfig: 345 83 04
#
# description: supervisor is a process control utility. It has a web based
# xmlrpc interface as well as a few other nifty features.
# Script was originally written by Jason Koppe <jkoppe@indeed.com>.
#
# source function library
. /etc/rc.d/init.d/functions
set -a
PREFIX=/usr
SUPERVISORD=$PREFIX/bin/supervisord
SUPERVISORCTL=$PREFIX/bin/supervisorctl
PIDFILE=/var/run/supervisord.pid
LOCKFILE=/var/lock/subsys/supervisord
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 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
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