On Fri, Aug 21, 2020 at 10:35:28AM +0800, Wu Fengguang wrote:

On Fri, Aug 21, 2020 at 10:17:00AM +0800, Luan Shengde wrote:

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On Fri, Aug 21, 2020 at 09:46:17AM +0800, Wu Fengguang wrote:

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As of version 18.03, you can use host.docker.internal as the host's IP.

https://stackoverflow.com/questions/22944631/how-to-get-the-ip-address-of-th...

excelent! I will try it. It seems that we need to add line in /etc/hosts: host_id host.docker.internal

which /etc/hosts?

I just tried debian docker, the DNS is not available:

wfg@debian ~% ping host.docker.internal ping: host.docker.internal: Name or service not known

it's the host machine: crystal-ci I test on my own server, add "host_ip host.docker.internal" in /etc/hosts, then execute "ping host.docker.internal" in docker container, it will goes well"

Thanks Luan Shengde

Thanks, Fengguang