JAVA单服务应用拆分成多个服务的实践(3)--前端的nginx

上篇文章JAVA单服务应用拆分成多个服务的实践(２)--服务的dubbo化已经将部分模块微服务化了，但我们怎么测试？
我们的目标是支持ALL In One,又要支持多个微服务，但前端怎么处理，前端代码又只有一个版本，但又要怎么面向多个微服务呢。
这样的话，我们只能引入伟大的nginx。
前端只认一个，就使用nginx的转发，将特定的请求转发到微服务的接口里，让前端无感请求到到另一服务中。
nginx的配置如下：

upstream auth {
  server 127.0.0.1:9082;
}
upstream org {
  server 127.0.0.1:9081;
}


upstream log {
  server 127.0.0.1:9083;
}

upstream dict {
  server 127.0.0.1:9084;
}

upstream  form {
  server 127.0.0.1:9085;
}
upstream  workflow {
  server 127.0.0.1:9086;
}

upstream  attachment {
  server 127.0.0.1:9087;
}
server {
  listen       80;
  server_name  localhost;

  #charset koi8-r;
  #access_log  /var/log/nginx/host.access.log  main;

  location / {
    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_pass http://workflow/oa_workflow/;
  }

  location ^~ /sys/auth {
    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_pass http://auth/sys_auth/sys/auth;
  }
  location ^~ /sys/org {
    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_pass http://org/sys_org/sys/org;
  }

  location ^~ /sys/log {
    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_pass http://log/sys_log/sys/log;
  }

  location ^~ /sys/dict {
    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_pass http://dict/sys_dict/sys/dict;
  }

  location ^~ /oa/form {
    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_pass http://form/oa_form/oa/form;
  }
  location ^~ /oa/workflow {
    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_pass http://workflow/oa_workflow/oa/workflow;
  }
  location ^~ /sys/attachment {
    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_pass http://attachment/sys_attachment/sys/attachment;
  }


  #error_page  404              /404.html;

  # redirect server error pages to the static page /50x.html
  #
  error_page   500 502 503 504  /50x.html;
  location = /50x.html {
    root   /usr/share/nginx/html;
  }

  # proxy the PHP scripts to Apache listening on 127.0.0.1:80
  #
  #location ~ \.php$ {
  #    proxy_pass   http://127.0.0.1;
  #}

  # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
  #
  #location ~ \.php$ {
  #    root           html;
  #    fastcgi_pass   127.0.0.1:9000;
  #    fastcgi_index  index.php;
  #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
  #    include        fastcgi_params;
  #}

  # deny access to .htaccess files, if Apache's document root
  # concurs with nginx's one
  #
  #location ~ /\.ht {
  #    deny  all;
  #}
}

按上所示，按前端请求的URL地址转发到各个服务中，有一点要特别提到的，关于/的转发，后面一定要有/
如下：

 location / {
    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_pass http://workflow/oa_workflow/;
  }

oa_workflow后面一定要有/,这个是默认转发，之前缺了这个，折腾了我很久。
至此，前端调整完成。
【未完待续】