Nginx Backup配置

/etc/nginx/nginx.conf

http {
    include       mime.types;
    default_type  application/octet-stream;

    sendfile        on;
    keepalive_timeout  65;

    upstream tomcat1{
        server [ip_addr]:8081 weight=1 max_fails=3 fail_timeout=10s;
	server [ip_addr]:8082 weight=1 max_fails=3 fail_timeout=10s backup;
    }
    upstream tomcat2{
        server [ip_addr]:8082 weight=1 max_fails=3 fail_timeout=10s;
        server [ip_addr]:8081 weight=1 max_fails=3 fail_timeout=10s backup;
    } 

    server {
        listen       80;
        server_name  [ip_addr];
        error_log /var/log/nginx/demo.error.log;

        location /index {
	    proxy_pass http://tomcat2;
	    proxy_set_header Host $host;
	    proxy_set_header X-Real-IP $remote_addr;
	    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_redirect off;
	}

        location / {
            proxy_pass http://tomcat1;
	    proxy_read_timeout 20;
        }

    error_page  404 403 500 502 503 504  /404.html;
        location = /404.html {
            root   /usr/local/nginx-1.14.0/html;
        }
    }
}