How to get the systemd resolver to resolve local (i.e. unqalified) names?

[Xen]

Chris Green schreef op 04-06-2017 13:10:

>> hosts: files dns
>> 
>> does "getent ..." still work?
>> 
> No, it simply returns nothing, no error.  'host esprimo' still returns
> SERVFAIL.

So this test reveals that getent used resolve and that dns was not 
working because of the missing "search".

The only thing that's really peculiar is as I've said that getent would 
work (using resolve) but "host" would not (also using resolve).

This means that if you change it to:

   hosts: files resolve


It still would not work.

man 3 gethostbyname2

is the function that getent uses.

Oh, of course.

"host" does not use glibc. It does not use nsswitch.conf.

It uses /etc/resolv.conf directly, which subsequently fails.



So as the email indicated,

- systemd-resolved works through the glibc nsswitch system
- other utilities may use /etc/resolv.conf directly.