[Bug 1549340] [NEW] hostname resolution broken during netinstall

[Reinhard]

Public bug reported:

We install all our Ubuntu-clients via netinstall.
The images from
"http://archive.ubuntu.com/ubuntu/dists/trusty/main/installer-amd64/current/images/netboot/ubuntu-installer/amd64/"
are used.

The configuration is done with a preseed-file.
In the preseed-file we use the option:

"d-i mirror/http/proxy string http://apca01:3142"

to point to our apt-cacher-ng package-cacher.

Since Friday, 19.2.2016 the installation stops at this point at tty1
with an error message:
"mirror server not found"
At tty4 we get a more detailed error message:
"segmentation fault at ip 14 ... sp ... error 6 in libresolv-2.19.so"

We found a bug fix, we do not like, because we want to use our preseed
file in other, different domains.

Changing the hostname "apca01" into its FQHN "apca01.example.com"
brought the installation back to work.

(Does it make sense to maintain domain suffixes in a preseed file)

We also found out that:
* >>host apca01 on tty2 also brought "segmentation fault at ip 14 ... sp... error 6 in libresolv-2.19.so".

* in /etc/resolv.conf "search example.com" seems to be ok and the name
server entry is correct.

* "ping APCA01" gives a segmentation fault, but "ping
APCA01.example.com" works.

* if the system is installed with FQHN, >>host apca01 works without
problems in the installed system.

* Ubuntu 16.04 installs with the original preseed-file without problems.

** Affects: glibc (Ubuntu)
     Importance: Undecided
         Status: New

** Package changed: nfs-utils (Ubuntu) => glibc (Ubuntu)

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https://bugs.launchpad.net/bugs/1549340

Title:
  hostname resolution broken during netinstall

Status in glibc package in Ubuntu:
  New

Bug description:
  We install all our Ubuntu-clients via netinstall.
  The images from
  "http://archive.ubuntu.com/ubuntu/dists/trusty/main/installer-amd64/current/images/netboot/ubuntu-installer/amd64/"
  are used.

  The configuration is done with a preseed-file.
  In the preseed-file we use the option:

  "d-i mirror/http/proxy string http://apca01:3142"

  to point to our apt-cacher-ng package-cacher.

  Since Friday, 19.2.2016 the installation stops at this point at tty1
  with an error message:
  "mirror server not found"
  At tty4 we get a more detailed error message:
  "segmentation fault at ip 14 ... sp ... error 6 in libresolv-2.19.so"

  We found a bug fix, we do not like, because we want to use our preseed
  file in other, different domains.

  Changing the hostname "apca01" into its FQHN "apca01.example.com"
  brought the installation back to work.

  (Does it make sense to maintain domain suffixes in a preseed file)

  We also found out that:
  * >>host apca01 on tty2 also brought "segmentation fault at ip 14 ... sp... error 6 in libresolv-2.19.so".

  * in /etc/resolv.conf "search example.com" seems to be ok and the name
  server entry is correct.

  * "ping APCA01" gives a segmentation fault, but "ping
  APCA01.example.com" works.

  * if the system is installed with FQHN, >>host apca01 works without
  problems in the installed system.

  * Ubuntu 16.04 installs with the original preseed-file without
  problems.

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