文件服务配置

应用服务器是多机高可用部署需配置（必须）

问卷服务器作为接入层

除接入机外，通过nginx配置来实现文件（图片，附件）始终转发到接入机，比如：

问卷应用服务器1：192.168.1.1 （服务器1负责问卷服务的接入和负载，同时负责文件系统的接入）

问卷应用服务器2：192.168.1.2

问卷应用服务器3：192.168.1.3

1. 服务器1修改 etc/nginx/gateway/server.upstream 文件，修改代码如下：

upstream ur_fe_balance {    server frontend:12004 weight=5 max_fails=2 fail_timeout=1s;    keepalive 15;}
upstream ur_cgi_balance {    server backend-php-7:12000 weight=1 max_fails=2 fail_timeout=6s;    keepalive 15;}
upstream ur_cgi_v2_balance {    server backend-php-7:12001 weight=1 max_fails=2 fail_timeout=6s;    keepalive 15;}
upstream ur_go_balance {   server backend-go-web:12008 weight=1 max_fails=2 fail_timeout=30s;}
upstream ur_file_v2_balance {   server backend-php-7:12001 weight=1 max_fails=2 fail_timeout=30s;}
修改为
upstream ur_fe_balance {    server frontend:12004 weight=5 max_fails=2 fail_timeout=1s;    server 192.168.1.2:12004 weight=5 max_fails=2 fail_timeout=1s;    server 192.168.1.3:12004 weight=5 max_fails=2 fail_timeout=1s;    keepalive 15;}
upstream ur_cgi_balance {    server backend-php-7:12000 weight=1 max_fails=2 fail_timeout=6s;    server 192.168.1.2:12000 weight=5 max_fails=2 fail_timeout=1s;    server 192.168.1.3:12000 weight=5 max_fails=2 fail_timeout=1s;    keepalive 15;}
upstream ur_cgi_v2_balance {    server backend-php-7:12001 weight=1 max_fails=2 fail_timeout=6s;    server 192.168.1.2:12001 weight=5 max_fails=2 fail_timeout=1s;    server 192.168.1.3:12001 weight=5 max_fails=2 fail_timeout=1s;    keepalive 15;}
upstream ur_go_balance {   server backend-go-web:12008 weight=1 max_fails=2 fail_timeout=30s;   server 192.168.1.2:12008 weight=5 max_fails=2 fail_timeout=1s;   server 192.168.1.3:12008 weight=5 max_fails=2 fail_timeout=1s;}
upstream ur_file_v2_balance {   server backend-php-7:12001 weight=1 max_fails=2 fail_timeout=30s;}

2. 服务器2和服务器3修改 etc/nginx/gateway/server.upstream 文件，修改代码如下：

upstream ur_file_v2_balance {   server backend-php-7:12001 weight=1 max_fails=2 fail_timeout=30s;}
修改为
upstream ur_file_v2_balance {   server 192.168.1.1:12001 weight=1 max_fails=2 fail_timeout=30s;}

自有服务器作为接入层

适用于客户有独立的接入机，不使用问卷服务器作为接入使用，比如：

独立接入机：192.168.1.4（独立接入机负责问卷服务的接入和负载）

问卷应用服务器1：192.168.1.1（负责文件系统的接入）

问卷应用服务器2：192.168.1.2

问卷应用服务器3：192.168.1.3

则服务器2和服务器3修改 etc/nginx/gateway/server.upstream 文件，修改代码如下：

upstream ur_file_v2_balance {   server backend-php-7:12001 weight=1 max_fails=2 fail_timeout=30s;}
修改为
upstream ur_file_v2_balance {   server 192.168.1.1:12001 weight=1 max_fails=2 fail_timeout=30s;}

注意：独立机转发到问卷应用服务器的时候，添加问卷所需header头，如下：

proxy_set_header        Host                $host:$proxy_port;proxy_set_header        X-Real-IP           $remote_addr;proxy_set_header        X-Forwarded-For     $proxy_add_x_forwarded_for;proxy_set_header        X-Forwarded-Proto   $scheme;proxy_set_header        X-Server-Protocol   $server_protocol;