docker 怎么在主机转发请求到各个容器里进行处理？

Question

刚开始折腾docker没几天。

比如我做一个web服务器，nginx放在主机里，在docker里建了几个php-fpm的容器，打算用nginx转发到容器里做负载均衡(测试，搞着玩的)。然后发现，在nginx的配置里写的转发地址，不好写啊。每次重启容器，都会自动重新分配一个新的ip，那我在主机nginx配置里写的转发地址，就会出错。。。

在网上看了很多，都说可以把容器弄成固定ip的，但各种麻烦，要自己弄网卡之类的，而且也不完美，据说重启后也是会重新分配，还需要再执行一次。。。

大家有没有什么好的思路，求解答

Answer 1

Two methods:

1. The php container uses -p to shoot the port to the host, and then nginx forwards it to localhost:[mapped port]

2. Put nginx in the container, link the php container, and forward nginx to linkname:port

Answer 2

LZ seems to have to run nginx on the host. Here is something that can dynamically change upstream. Combined with docker inspect you can get it:

https://github.com/yzprofile/...

Answer 3

docker inspect --format='{{.NetworkSettings.IPAddress}}' [CONTAINER_ID]

You can get the IP with this command, and write an automated script to generate nginx config yourself