Comment 3 for bug 1576116

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Blake Rouse (blake-rouse) wrote : Re: DNS resolver added to loopback

The MAAS DNS nameserver being added to loopback is correct. This is not MAAS doing this but curtin. We tell curtin that the DNS nameserver for the MAAS region is a global nameserver meaning it should be used on all interfaces no matter what. That tells curtin to place it into the loopback interface. The loopback interface is always up and resolvconf will read that data an place it into the resolv.conf.

If this was not placed into the loopback curtin would need to place it under resolv.conf.d/base because it would not work any where else in the /e/n/i config. This was a previous bug that curtin had and was resolved by placing the global DNS nameservers on the loopback interface.