指定不同机器的host后，还是获取不到数据，存在跨域请求的问题！

due to cross site origin limitations, the dashboard will only work if it's on the same subdomain as varnish agent (meaning you must use it with the -h option of varnish agent, preventing the usage of multiple servers). i've submitted a patch to varnish agent to fix this, but until it's merged, only one varnish backend is supported.

config.example.js中可以配置的，这是个数组，可以添加多台server的

这个问题在 github 上已经有人解决了，是一个bug。

https://github.com/brandonwamboldt/varnish-dashboard/issues/4

下面是可用的配置例子：

var config = {
    servers: [
        {    name: 'VarnishDev1',    host: '1.1.1.1',    port: 6085,    user: 'user',    pass: 'pass'  },  
        {    name: 'VarnishDev2',    host: '2.2.2.2',    port: 6085,    user: 'user',    pass: 'pass'  },  
        {    name: 'VarnishProd1',    host: '3.3.3.3',    port: 6085,    user: 'user',    pass: 'pass'  },  
        {    name: 'VarnishProd2',    host: '4.4.4.4',    port: 6085,    user: 'user',    pass: 'pass'  }
    ],
    groups: [
        {
            name: 'dev',
            servers: [
                'VarnishDev1',
                'VarnishDev2',
            ]
        },
        {
            name: 'prod',
            servers: [
                'VarnishProd1',
                'VarnishProd2',
            ]
        }
    ],
    update_freq: 2000,
    max_points: 100,
    default_log_fetch: 100000,
    default_log_display: 100,
    show_bans_page: true,
    show_manage_server_page: true,
    show_vcl_page: true,
    show_stats_page: true,
    show_params_page: true,
    show_logs_page: true,
    show_restart_varnish_btn: true
};