1.down 表示单前的server暂时不参与负载
2.weight 默认为1.weight越大,负载的权重就越大。
3.max_fails :允许请求失败的次数默认为1.当超过最大次数时,返回proxy_next_upstream 模块定义的错误
4.fail_timeout:max_fails次失败后,暂停的时间。
5.backup: 其它所有的非backup机器down或者忙的时候,请求backup机器。所以这台机器压力会最轻。
upstream web_server {
server resin1:8080 weight=10 max_fails=3 fail_timeout=2s;
server resin2:8080 weight=10 max_fails=3 fail_timeout=2s;
server resin3:8080 weight=10 max_fails=3 fail_timeout=2s;
keepalive 32;
}
server {
listen 80;
server_name www.xxxx.com;
location / {
proxy_next_upstream http_404 http_500 http_502 http_503 http_504 error timeout invalid_header;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_read_timeout 10s;
proxy_pass web_server;
}
}