How do I configure which DNS server docker uses in Docker Desktop for Mac?

docker dns docker-for-mac docker-desktop
Lars Nyström picture Lars Nyström · Jun 7, 2017 · Viewed 9.1k times · Source

The built in DNS server in Docker Desktop for Mac is really slow, so I'd like to use a different DNS server by default. I know I can add --dns=... when running docker commands, but I'd like a way to set the default DNS server for all containers to avoid having to specify the DNS server individually for every container.

How can I set the default DNS server for all containers on Docker for Mac?

Answer

BMitch picture BMitch · Jun 7, 2017

In current versions of Docker for Mac, you can go to the Whale Icon -> Preferences -> Daemon -> Advanced and adjust the daemon level DNS settings with a daemon.json config. If your config is currently empty, this would add your own DNS setting with two entries:

{
  "dns": ["8.8.8.8", "192.168.0.1"]
}

If you already have content in here, then add an entry for "dns" to your json. See the daemon configuration documentation for other options you can add here.

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