可以使用 haproxy 来平衡 unix 套接字吗？

Question

在 nginx 中，将其配置为代理 unix.sock文件相当简单

例如：

upstream bla {
      server unix:///home/sam/Source/bla/tmp/sockets/thin1.sock;
      server unix:///home/sam/Source/bla/tmp/sockets/thin2.sock;
 }

haProxy 中是否有类似的语法来启用平衡本地.sock文件

Answer 1

简短回答：是的，从 1.5 版开始。

让我们看看服务器关键字参数文档：

<address> is the IPv4 or IPv6 address of the server. Alternatively, a
          resolvable hostname is supported, but this name will be resolved
          during start-up. Address "0.0.0.0" or "*" has a special meaning.
          It indicates that the connection will be forwarded to the same IP
          address as the one from the client connection. This is useful in
          transparent proxy architectures where the client's connection is
          intercepted and haproxy must forward to the original destination
          address. This is more or less what the "transparent" keyword does
          except that with a server it's possible to limit concurrency and
          to report statistics. Optionally, an address family prefix may be
          used before the address to force the family regardless of the
          address format, which can be useful to specify a path to a unix
          socket with no slash ('/'). Currently supported prefixes are :
                - 'ipv4@'  -> address is always IPv4
                - 'ipv6@'  -> address is always IPv6
                - 'unix@'  -> address is a path to a local unix socket
                - 'abns@'  -> address is in abstract namespace (Linux only)
          Any part of the address string may reference any number of
          environment variables by preceding their name with a dollar
          sign ('$') and optionally enclosing them with braces ('{}'),
          similarly to what is done in Bourne shell.

因此，您可以使用前导斜杠指定 unix 套接字的路径，或者显式添加地址族前缀：

server nginx1 /run/nginx/default.sock
server nginx2 unix@default.sock