name resolution

[Xen]

So I have two issues.

One is that nsswitch resolution of .local domain doesn't work 
(explicitly):



ping john.local

<no response>


ping john

PING john.local (192.168.0.151) 56(84) bytes of data.
64 bytes from 192.168.0.151: icmp_seq=1 ttl=64 time=1.38 ms
64 bytes from 192.168.0.151: icmp_seq=2 ttl=64 time=1.53 ms

The other is that NetworkManager does not use the "domain" returned from 
DHCP to set up a "split" domain with requests for domain ("local") going 
to the DNS server acquired via DHCP.

In case you have another connection (e.g. mobile).

NetworkManager supports this:

[global-dns]
searches=local

[global-dns-domain-local]
servers=192.168.0.3

[global-dns-domain-*]
servers=8.8.8.8

Apparently it works (now) but "nmcli device show" does not list ANYTHING 
about those entries.

However I am a bit quick to speak as the dnsmasq log shows that it's 
working now:

Nov 23 15:15:32 kubuntu dnsmasq[31666]: setting upstream servers from 
DBus
Nov 23 15:15:32 kubuntu dnsmasq[31666]: using nameserver 192.168.20.3#53 
for domain local
Nov 23 15:15:32 kubuntu dnsmasq[31666]: using nameserver 8.8.8.8#53

Even though it is not reflected in "nmcli device show"

The "default" section is required, bit annoying, so I use google DNS.

So this part is covered now (yay!)

The downside is that this is a static configuration, not from DHCP.




But I still can't ping .local explicitly.

$ host john.local
john.local has address 192.168.0.151

Host queries the nameserver directly.

$ dig john.local @127.0.1.1

; <<>> DiG 9.10.3-P4-Ubuntu <<>> john.local @127.0.1.1
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 27651
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;john.local.                  IN      A

;; ANSWER SECTION:
john.local.           0       IN      A       192.168.0.151

;; Query time: 1 msec
;; SERVER: 127.0.1.1#53(127.0.1.1)
;; WHEN: Thu Nov 23 15:26:04 CET 2017
;; MSG SIZE  rcvd: 57




$ dig john.local @192.168.0.3

; <<>> DiG 9.10.3-P4-Ubuntu <<>> john.local @192.168.0.3
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 35335
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;john.local.                  IN      A

;; ANSWER SECTION:
john.local.           0       IN      A       192.168.0.151

;; Query time: 1 msec
;; SERVER: 192.168.0.3#53(192.168.0.3)
;; WHEN: Thu Nov 23 15:27:36 CET 2017
;; MSG SIZE  rcvd: 57




Anyone got any ideas?