Bug#766182: systemd: incorrect dmesg message about missing nss-myhostname

[Vincent Lefevre]

On 2015-09-11 08:32:41 +0200, Michael Biebl wrote:
> The presence of /etc/hosts does not mean that your local hostname is
> configured there. It can easily get out of sync from what's configured
> in /etc/hostname.

I disagree: you could also check whether the local hostname is
configured there. Anyway, I no longer get this warning message
(though libnss-myhostname is still not installed on this machine),
so everything is now OK. The disappearance of the warning message
occurred between 2015-05-12 and 2015-06-28.

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Bug#766182: systemd: incorrect dmesg message about missing nss-myhostname

[Vincent Lefevre]

Package: systemd
Version: 215-5+b1
Severity: minor

dmesg output gives:

  systemd-hostnamed[3013]: Warning: nss-myhostname is not installed.
  Changing the local hostname might make it unresolveable. Please
  install nss-myhostname!

This is incorrect: nss-myhostname is not needed when there is a
/etc/hosts file. If installed, it makes some software, such as exim4,
fails to work correctly because of a clash between nss-myhostname
and usual /etc/hosts configuration (FQDN set up for IPv4 only).
See bug 756224, and in particular

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=756224#114

for the explanation (in short, nss-myhostname adds IPv6 resolution,
but doesn't return the FQDN, while IPv4 resolution returns the FQDN
via /etc/hosts as expected).

This message should not be displayed when a /etc/hosts file is
present.

-- Package-specific info:

-- System Information:
Debian Release: jessie/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 
'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.16-3-amd64 (SMP w/8 CPU cores)
Locale: LANG=POSIX, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages systemd depends on:
ii  acl 2.2.52-2
ii  adduser 3.113+nmu3
ii  initscripts 2.88dsf-53.4
ii  libacl1 2.2.52-2
ii  libaudit1   1:2.4-1
ii  libblkid1   2.25.1-5
ii  libc6   2.19-11
ii  libcap2 1:2.24-6
ii  libcap2-bin 1:2.24-6
ii  libcryptsetup4  2:1.6.6-2
ii  libgcrypt20 1.6.2-4
ii  libkmod218-3
ii  liblzma55.1.1alpha+20120614-2
ii  libpam0g1.1.8-3.1
ii  libselinux1 2.3-2
ii  libsystemd0 215-5+b1
ii  sysv-rc 2.88dsf-53.4
ii  udev215-5+b1
ii  util-linux  2.25.1-5

Versions of packages systemd recommends:
ii  dbus1.8.8-2
ii  libpam-systemd  215-5+b1

Versions of packages systemd suggests:
pn  systemd-ui  none

-- Configuration Files:
/etc/pam.d/systemd-user [Errno 2] No such file or directory: 
u'/etc/pam.d/systemd-user'

-- no debconf information


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