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 $TEMP) ; the below section must remain in the config file for RPC ; (supervisorctl/web interface) to work, additional interfaces may be ; added by defining them in separate rpcinterface: sections [rpcinterface:supervisor] supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface [supervisorctl] serverurl=unix:///var/run//supervisor.sock ; use a unix:// URL for a unix socket ; The [include] section can just contain the "files" setting. This ; setting can list multiple files (separated by whitespace or ; newlines). It can also contain wildcards. The filenames are ; interpreted as relative to this file. Included files *cannot* ; include files themselves. [include] files = /etc/supervisor/conf.d/*.conf##这里就是include了具体的配置文件，你需要在/etc/supervisor/conf.d/文件夹下新建conf文件。 比如你在conf.d文件夹下新建的tornado.conf的文件
[program:tornado-80]command=python /var/www/starter.py 6901 #这里就是运行web，如果跟nginx结合，还需要监听6902,6900端口directory=/var/www/user=www-dataautorestart=trueredirect_stderr=truestdout_logfile=/var/log/tornado.logloglevel=info
启动supervisor：
Usage: /etc/init.d/supervisord {start|stop|restart|force-reload|status|force-stop}
进入supervisor命令行：sudo supervisorctl
5. 守护supervisor进程：
#!/bin/shpywebn=`ps aux | grep supervisord | grep -v "grep" | wc -l`; #wc -l 的意思是输出文件的行数，如果不等于1，则说明没有运行了，需要再启动下if [ "$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