Z LPAR 17.10: DNS server provided during the install process is not configured

[John George]

The DNS server provided to the debian-installer is not configured

ubuntu@s5lp7:/var/log/installer$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu Artful Aardvark (development branch)
Release: 17.10
Codename: artful

ubuntu@s5lp7:/var/log/installer$ dig 10.245.208.1 us.ports.ubuntu.com

; <<>> DiG 9.10.3-P4-Ubuntu <<>> 10.245.208.1 us.ports.ubuntu.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 37759
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 65494
;; QUESTION SECTION:
;10.245.208.1. IN A

;; Query time: 0 msec
;; SERVER: 127.0.0.53#53(127.0.0.53)
;; WHEN: Wed Oct 04 16:16:33 UTC 2017
;; MSG SIZE rcvd: 41

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 18831
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 65494
;; QUESTION SECTION:
;us.ports.ubuntu.com. IN A

;; Query time: 0 msec
;; SERVER: 127.0.0.53#53(127.0.0.53)
;; WHEN: Wed Oct 04 16:16:33 UTC 2017
;; MSG SIZE rcvd: 48

Works when specifically providing the DNS IP:
ubuntu@s5lp7:/var/log/installer$ dig @10.245.208.1 us.ports.ubuntu.com
; <<>> DiG 9.10.3-P4-Ubuntu <<>> @10.245.208.1 us.ports.ubuntu.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 37847
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 4, ADDITIONAL: 6

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;us.ports.ubuntu.com. IN A

;; ANSWER SECTION:
us.ports.ubuntu.com. 299 IN A 91.189.91.11

;; AUTHORITY SECTION:
ubuntu.com. 76 IN NS ns4.p27.dynect.net.
ubuntu.com. 76 IN NS ns2.p27.dynect.net.
ubuntu.com. 76 IN NS ns3.p27.dynect.net.
ubuntu.com. 76 IN NS ns1.p27.dynect.net.

;; ADDITIONAL SECTION:
ns1.p27.dynect.NET. 63971 IN A 208.78.70.27
ns1.p27.dynect.NET. 72 IN AAAA 2001:500:90:1::27
ns2.p27.dynect.NET. 63971 IN A 204.13.250.27
ns3.p27.dynect.NET. 63971 IN A 208.78.71.27
ns4.p27.dynect.NET. 63971 IN A 204.13.251.27

;; Query time: 0 msec
;; SERVER: 10.245.208.1#53(10.245.208.1)
;; WHEN: Wed Oct 04 16:21:49 UTC 2017
;; MSG SIZE rcvd: 272

ubuntu@s5lp7:/var/log/installer$ cat /etc/network/interfaces
 # dns-* options are implemented by the resolvconf package, if installed
 dns-nameservers 10.245.208.1
 dns-search canonical.com

ubuntu@s5lp7:/var/log/installer$ cat /etc/resolv.conf
# This file is managed by man:systemd-resolved(8). Do not edit.
#
# 127.0.0.53 is the systemd-resolved stub resolver.
# run "systemd-resolve --status" to see details about the actual nameservers.
nameserver 127.0.0.53

Can be worked around by directly adding a nameserver entry to /etc/resolv.conf
ubuntu@s5lp7:/var/log/installer$ cat /etc/resolv.conf
# This file is managed by man:systemd-resolved(8). Do not edit.
#
# 127.0.0.53 is the systemd-resolved stub resolver.
# run "systemd-resolve --status" to see details about the actual nameservers.
nameserver 10.245.208.1
#nameserver 127.0.0.53