Centos6.3 下安裝 Ngixn +tornado + supervisor

tornado先天對異步(no-bolocking)處理能力，很是適合做爲Web服務。tornado在linux平臺使用epoll來實現異步事件的處理，性能很是好。可是python作爲一個腳步語言，單進程執行，沒法利用多CPU，對當今的多核CPU是一個很大的浪費。爲提升性能，提升CPU利用率，通常會將tornado程序容許cup*n個。 怎樣才能放便啓動多個tornado程序呢，咱們能夠用supervisor來管理多個tornado應用。supervisor安裝很是方便

easy_install supervisord

###安裝Nginx

groupadd www
useradd -s /sbin/nologin -g www www
mkdir -p /data/wwwroot
chmod +w /data/wwwroot
mkdir -p /data/wwwroot/logs
chmod 755 /data/wwwroot/logs
chown -R www:www /data/wwwroot

wget http://www.nginx.org/download/nginx-1.3.11.tar.gz -P /data/soft/src/
tar zxvf /data/soft/src/nginx-1.3.11.tar.gz -C /data/soft/install
cd /data/soft/install/nginx-1.3.11

yum install zlib pcre pcre-devel openssl

./configure \
    --user=www\
    --group=www\
    --prefix=/etc/nginx\
    --sbin-path=/etc/nginx/sbin/nginx\
    --conf-path=/etc/nginx/conf/nginx.conf\
    --with-http_stub_status_module\
    --with-http_ssl_module\
    --with-pcre\    
make &&  make install

vim /etc/init.d/nginx

加入如下內容

#!/bin/bash
#
# chkconfig: - 85 15
# description: Nginx is a World Wide Web server.
# processname: nginx

nginx=/etc/nginx/sbin/nginx
conf=/etc/nginx/conf/nginx.conf

case $1 in
       start)
              echo -n "Starting Nginx"
              $nginx -c $conf
              echo " done"
       ;;

       stop)
              echo -n "Stopping Nginx"
              killall -9 nginx
              echo " done"
       ;;

       test)
              $nginx -t -c $conf
       ;;

reload)
              echo -n "Reloading Nginx"
              ps auxww | grep nginx | grep master | awk '{print $2}' | xargs kill -HUP
              echo " done"
       ;;

restart)
$0 stop
$0 start
       ;;

       show)
              ps -aux|grep nginx
       ;;

       *)
              echo -n "Usage: $0 {start|restart|reload|stop|test|show}"
       ;;
esac

chmod +x /etc/init.d/nginx

chkconfig --add nginx
chkconfig nginx on

service nginx start
service nginx test

mv /etc/nginx/conf/nginx.conf /etc/nginx/conf/nginx.conf_bak
cp /data/soft/src/nginx.conf /etc/nginx/conf/nginx.conf
vim /etc/nginx/conf/nginx.conf

安裝tornado

yum install python-setuptools
easy_install tornado

###安裝 supervisor

http://supervisord.org/configuration.html?highlight=program#program-x-section-settings

easy_install supervisor

而後建立配置文件

echo_supervisord_conf > /etc/supervisord.conf

vim /etc/supervisord.conf

最後面加上：

[program:tornado_poll]
command=python /home/wwwroot/app/app.py 80%(process_num)02d      ;要執行的命令，這裏的「%(process_num)02d」會用2位精度的進程號替換，例如，第一個進程是8001，第二個進程是8002，以此類推，下同。
process_name=%(program_name)s-80%(process_num)02d    							;process_name expr (default %(program_name)s)   ;啓動的進程的名字，這裏的名字只是supervisor內部是別用，與你所啓動程序的進程名無關
numprocs=4                   													; 啓動幾個tornado進程
directory=/home/wwwroot/app 									; 運行前cd到此目錄
autostart=true                ; supervisord守護程序啓動時自動啓動tornado
autorestart=true              ; supervisord守護程序重啓時自動重啓tornado
user=www-data                   ; 運行程序前su到此用戶
redirect_stderr=true          ; 將stderr重定向到stdout
stdout_logfile=/home/wwwroot/logs/tornado-80%(process_num)02d.log
stdout_logfile_maxbytes=500MB
stdout_logfile_backups=50
stdout_capture_maxbytes=1MB
stdout_events_enabled=false
loglevel=warn

運行：

supervisord

root@vps:/tmp# supervisorctl
tornado_poll:tornado_poll-8000   RUNNING    pid 11352, uptime 0:29:01
tornado_poll:tornado_poll-8001   RUNNING    pid 11347, uptime 0:29:02
supervisor>#這裏能夠輸入控制命令

咱們能夠看到，上面顯示瞭如今正在運行的守護進程的信息，下面介紹幾個經常使用的控制命令

stop all #中止全部進程
stop tornado_poll:tornado_poll-8000 #中止運行在8000端口上的Tornado守護進程
stop tornado_poll:* #中止全部Tornado守護進程



supervisord
supervisorctl reload

問題：

* Starting Supervisor daemon manager...
Error: Another program is already listening on a port that one of our HTTP servers is configured to use.  Shut this program down first before starting supervisord.
For help, use /usr/bin/supervisord -h
   ...fail!

解決辦法：

unlink /tmp/supervisor.sock

http://www.idndx.com/posts/ways-to-deploy-tornado-under-production-environment-using-supervisor.html

http://supervisord.org/ http://fendou.org/2011/09/23/supervisor-nginx-tornado/