相关疑难解决方法(0)

我们在Docker的常见域下有几个rails应用程序,我们使用nginx将请求定向到特定应用程序.

our_dev_server.com/foo # proxies to foo app
our_dev_server.com/bar # proxies to bar

Config看起来像这样:

upstream foo {
  server foo:3000;
}

upstream bar {
  server bar:3000;
}

# and about 10 more...

server {
  listen *:80 default_server;

  server_name our_dev_server.com;

  location /foo {
      # this is specific to asset management in rails dev
      rewrite ^/foo/assets(/.*)$ /assets/$1 break;
      rewrite ^/foo(/.*)$ /foo/$1 break;
      proxy_pass http://foo;
  }

  location /bar {
      rewrite ^/bar/assets(/.*)$ /assets/$1 break;
      rewrite ^/bar(/.*)$ /bar/$1 break;
      proxy_pass http://bar;
  }

  # and about 10 more... …

所以，我想nginx在请求时解析后端的主机名。我希望HTTP 502 Bad Gateway在后端服务关闭时得到响应，并且在它启动时得到服务响应。

我使用nginx:1.15-alpine图像nginx，这是我在它的配置中所拥有的：

server {

  resolver kube-dns.kube-system.svc.cluster.local valid=5s;

  server_name  mysystem.com;
  listen       80;

  client_max_body_size 20M;

  location = /nginx_status {
      stub_status on;
      access_log off;
  }

  # Services configuration

  location ~ /my-service/ {
      set $service_endpoint http://my-service.namespace:8080;
      proxy_pass $service_endpoint$request_uri;
      include includes/defaults-inc.conf;
      include includes/proxy-inc.conf;
  }

}

因此，当我向 nginx 发出请求时，我收到 502 Bad Gateway 响应。Nginx 的日志说找不到名称：

2018/06/28 19:49:18 [error] 7#7: *1 my-service.namespace could not be resolved (3: Host not found), client: 10.44.0.1, server: mysystem.com, request: "GET /my-service/version …