tornado nginx supervisor

安装：sudo apt-get install python-tornado

sudo apt-get install nginx

sudo apt-get install supervisor

1. 配置nginx。我安装的nginx的目录为2个配置文件。/etc/nginx/nginx.conf 和 /etc/nginx/conf.d/foo.conf.

实际上是nginx.conf包含了文件foo.conf

所以如果没有特殊需求，就不需要更改nginx.conf了，在conf.d文件夹下新建你的conf文件。

foo.conf的内容;

upstream  foo  {
    #ip_hash;
    #consistent_hash $args;这里就是你需要nginx帮你代理的端口，下面的意思是将访问80端口的请求分配到6900,6901,6902上去。其他的无需更改。如果你不用supervisor，那就需要手工运行你的web程序，监听6900,6901,6902
    server   127.0.0.1:6900 weight=1 max_fails=2 fail_timeout=30s;
    server   127.0.0.1:6901 weight=1 max_fails=2 fail_timeout=30s;
    server   127.0.0.1:6902 weight=1 max_fails=2 fail_timeout=30s;
    
}

server {
    listen  80;
    server_tag off;
    index index.html;
    charset utf-8;
 
  
  

    location / {
        proxy_read_timeout  100;
        proxy_pass_header   User-Agent;
        proxy_set_header    Host             $http_host;
        proxy_set_header    X-Real-IP        $remote_addr;
        proxy_set_header    X-Forwarded-For  $proxy_add_x_forwarded_for;
        proxy_set_header    X-Scheme         $scheme;
        proxy_set_header    Accept-Encoding  'gzip';
        proxy_pass          http://foo;
        proxy_redirect      off;
        proxy_store         off;
        
    }
    
    
    location /stat {
        stub_status    on;
        access_log    off;
    }
       
    
    proxy_buffering off;

}

3. 运行nginx：sudo /usr/sbin/nginx

如果发生这个错误：

nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)

原因是80已经被占用了，很有可能是被nginx占用了，

找到进程结束掉或者结束掉nginx进程。/usr/sbin/nginx -s stop

4. /etc/supervisor/supervisord.conf内容：（）

[unix_http_server]
file=/var/run//supervisor.sock   ; (the path to the socket file)
chmod=0700                       ; sockef file mode (default 0700)
[supervisord]
logfile=/var/log/supervisor/supervisord.log ; (main log file;default $CWD/supervisord.log)
pidfile=/var/run/supervisord.pid ; (supervisord pidfile;default supervisord.pid)
childlogdir=/var/log/supervisor            ; ('AUTO' child log dir, default $TEMP)
; the below section must remain in the config file for RPC
; (supervisorctl/web interface) to work, additional interfaces may be
; added by defining them in separate rpcinterface: sections
[rpcinterface:supervisor]
supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface
[supervisorctl]
serverurl=unix:///var/run//supervisor.sock ; use a unix:// URL  for a unix socket
; The [include] section can just contain the "files" setting.  This
; setting can list multiple files (separated by whitespace or
; newlines).  It can also contain wildcards.  The filenames are
; interpreted as relative to this file.  Included files *cannot*
; include files themselves.
[include]
files = /etc/supervisor/conf.d/*.conf##这里就是include了具体的配置文件，你需要在/etc/supervisor/conf.d/文件夹下新建conf文件。

比如你在conf.d文件夹下新建的tornado.conf的文件

[program:tornado-80]
command=python /var/www/starter.py 6901 #这里就是运行web，如果跟nginx结合，还需要监听6902,6900端口
directory=/var/www/
user=www-data
autorestart=true
redirect_stderr=true
stdout_logfile=/var/log/tornado.log
loglevel=info

启动supervisor：

Usage: /etc/init.d/supervisord {start|stop|restart|force-reload|status|force-stop}

进入supervisor命令行：

sudo supervisorctl

5. 守护supervisor进程：

#!/bin/sh

pywebn=`ps aux | grep supervisord | grep -v "grep" | wc -l`; #wc -l  的意思是输出文件的行数，如果不等于1，则说明没有运行了，需要再启动下

if [ "$pywebn" != "1" ]; then
    sleep 1;
    /usr/bin/python /usr/local/bin/supervisord -c /etc/supervisord.conf;

else
    break;
fi

6. 排错

INFO gave up: tornado entered FATAL state, too many start retries too quickly

这个网上有很多个情况，基本上是因为你的程序执行了就退出了，然后又执行，又退出，导致的

要看看你的程序是否有问题，我的情况是python web.py 80 的时候就有问题，换成python web.py 8888 就没问题了。

直接在shell中执行python web.py 80 就没有问题

如果supervisor有问题，除了需要看/var/log/supervisor/supervisord.log还要看你配置的log，如/var/log/tornado.log