[Bug 1646585] Re: oem-config replaces /etc/resolv.conf symlink with a hard file

[Mathieu Trudel-Lapierre]

Indeed, ubiquity has not been updated yet, because we should be able to
verify netcfg without it. Nevertheless, I have another SRU to land that
also needs to be applied to xenial, so I'll upload ubiquity along as
soon as netcfg lands in xenial-proposed.

** Description changed:

- The DGX server install process uses oem-config to setup certain
- settings.  We are seeing that oem-config-firstboot is replacing the
- /etc/resolv.conf symlink to /run/resolvconf/resolv.conf with a hard file
- at /etc/resolv.conf.
+ [Impact]
+ This breaks oem-config installs because after running oem-config-firstboot, /etc/resolv.conf's symlink might be replaced by a regular file.
+ 
+ [Test case]
+ The DGX server install process uses oem-config to setup certain settings.  We are seeing that oem-config-firstboot is replacing the /etc/resolv.conf symlink to /run/resolvconf/resolv.conf with a hard file at /etc/resolv.conf.
  
  This was confirmed by booting in single user mode after a fresh install,
  and seeing the symlink is still there.  Then go thru oem-config-
  firstboot, and find that the symlink is no longer there when that is
  done.
  
  We have to run "sudo dpkg-reconfigure resolvconf" to restore that
  symlink.
+ 
+ [Regression potential]
+ This may regress by failing to recognize a case where resolvconf is not in use, or triggering a false-positive (resolvconf is not in use, by an install is tricked into thinking it is and removes resolv.conf). Corruption of /etc/resolv.conf or /run/resolvconf/resolv.conf should be considered as possible regressions from this SRU.

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to netcfg in Ubuntu.
https://bugs.launchpad.net/bugs/1646585

Title:
  oem-config replaces /etc/resolv.conf symlink with a hard file

Status in Nvidia:
  New
Status in netcfg package in Ubuntu:
  Fix Released
Status in ubiquity package in Ubuntu:
  Fix Released
Status in netcfg source package in Xenial:
  Fix Committed
Status in ubiquity source package in Xenial:
  Triaged
Status in netcfg source package in Zesty:
  Fix Released
Status in ubiquity source package in Zesty:
  Fix Released

Bug description:
  [Impact]
  This breaks oem-config installs because after running oem-config-firstboot, /etc/resolv.conf's symlink might be replaced by a regular file.

  [Test case]
  The DGX server install process uses oem-config to setup certain settings.  We are seeing that oem-config-firstboot is replacing the /etc/resolv.conf symlink to /run/resolvconf/resolv.conf with a hard file at /etc/resolv.conf.

  This was confirmed by booting in single user mode after a fresh
  install, and seeing the symlink is still there.  Then go thru oem-
  config-firstboot, and find that the symlink is no longer there when
  that is done.

  We have to run "sudo dpkg-reconfigure resolvconf" to restore that
  symlink.

  [Regression potential]
  This may regress by failing to recognize a case where resolvconf is not in use, or triggering a false-positive (resolvconf is not in use, by an install is tricked into thinking it is and removes resolv.conf). Corruption of /etc/resolv.conf or /run/resolvconf/resolv.conf should be considered as possible regressions from this SRU.

To manage notifications about this bug go to:
https://bugs.launchpad.net/nvidia/+bug/1646585/+subscriptions