[Bug 1620559] Re: /etc/resolv.conf is empty on snappy

[Nikos Paraschou]

gh

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Title:
  /etc/resolv.conf is empty on snappy

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[Bug 1620559] Re: /etc/resolv.conf is empty on snappy

[Oliver Grawert]

** Changed in: snappy
   Status: New => Incomplete

** Changed in: snappy
   Status: Incomplete => Fix Released

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Title:
  /etc/resolv.conf is empty on snappy

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[Bug 1620559] Re: /etc/resolv.conf is empty on snappy

[Launchpad Bug Tracker]

This bug was fixed in the package systemd - 229-4ubuntu8

---
systemd (229-4ubuntu8) xenial-proposed; urgency=medium

  * Queue loading transient units after setting their properties. Fixes
starting VMs with libvirt. (LP: #1529079)
  * Connect pid1's stdin/out/err fds to /dev/null also for containers. This
fixes generators which expect a valid stdout/err fd in some container
technologies. (LP: #1608953)
  * 73-usb-net-by-mac.rules: Do not run readlink for *every* uevent, and
merely check if /etc/udev/rules.d/80-net-setup-link.rules exists.
A common way to disable an udev rule is to just "touch" it in
/etc/udev/rule.d/ (i. e. empty file), and if the rule is customized we
cannot really predict anyway if the user wants MAC-based USB net names or
not. (LP: #1615021)
  * systemd-networkd-resolvconf-update.service: Also pick up DNS servers from
individual link leases, as they sometimes don't appear in the global
ifstate. (LP: #1620559)

 -- Martin Pitt   Tue, 06 Sep 2016 14:16:29
+0200

** Changed in: systemd (Ubuntu Xenial)
   Status: Fix Committed => Fix Released

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Title:
  /etc/resolv.conf is empty on snappy

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[Bug 1620559] Re: /etc/resolv.conf is empty on snappy

[Oliver Grawert]

works fine now

** Tags removed: verification-needed
** Tags added: verification-done

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Title:
  /etc/resolv.conf is empty on snappy

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[Bug 1620559] Re: /etc/resolv.conf is empty on snappy

[Andy Whitcroft]

Hello Oliver, or anyone else affected,

Accepted systemd into xenial-proposed. The package will build now and be
available at https://launchpad.net/ubuntu/+source/systemd/229-4ubuntu8
in a few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to
enable and use -proposed.  Your feedback will aid us getting this update
out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: systemd (Ubuntu Xenial)
   Status: In Progress => Fix Committed

** Tags added: verification-needed

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Title:
  /etc/resolv.conf is empty on snappy

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[Bug 1620559] Re: /etc/resolv.conf is empty on snappy

[Martin Pitt]

** Description changed:

  we currently have no working resolver on snappy installs,
  /etc/resolv.conf is the boilerplate one.
  
  on the low level we seem to have DNS from the DHCP server though
  
  ogra@localhost:~$ grep -r DNS= /run/systemd/netif
  /run/systemd/netif/leases/3:DNS=217.237.150.115 217.237.151.205
  /run/systemd/netif/links/3:DNS=217.237.150.115 217.237.151.205
  /run/systemd/netif/links/3:MDNS=no
  ogra@localhost:~$
  
  SRU INFORMATION
  ===
+ Fix: 
https://anonscm.debian.org/cgit/pkg-systemd/systemd.git/commit/?h=ubuntu-xenial=0a96feb1561
+ 
+ 
  Test case:
  
  I cannot reproduce this in a VM or normal laptop, this is somehow
  specific to the reporter's hardware/DHCP server config.
  
-  * Configure systemd-networkd for an ethernet interface, either directly or 
via netplan; remove it from /etc/network/interfaces{,.d}
-  * Reboot.
-  * With current xenial's systemd, if /run/systemd/netif/state does not have 
"DNS=" then /etc/resolv.conf will not have any nameserver.
-  * With the proposed update, /etc/resolv.conf should have the DHCP-provided 
nameserver.
+  * Configure systemd-networkd for an ethernet interface, either directly or 
via netplan; remove it from /etc/network/interfaces{,.d}
+  * Reboot.
+  * With current xenial's systemd, if /run/systemd/netif/state does not have 
"DNS=" then /etc/resolv.conf will not have any nameserver.
+  * With the proposed update, /etc/resolv.conf should have the DHCP-provided 
nameserver.
  
  Regression potential: Low; in 16.04 LTS we do not configure networkd by
  any Ubuntu tool, so networkd is not widely used there yet. For systems
  which do use it it could happen that interface-specific DNS servers now
  appear in resolv.conf that should not be global -- but we do not have
  anything that would configure or obey this setup in 16.04.

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Title:
  /etc/resolv.conf is empty on snappy

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[Bug 1620559] Re: /etc/resolv.conf is empty on snappy

[Martin Pitt]

** Description changed:

  we currently have no working resolver on snappy installs,
  /etc/resolv.conf is the boilerplate one.
  
  on the low level we seem to have DNS from the DHCP server though
  
  ogra@localhost:~$ grep -r DNS= /run/systemd/netif
  /run/systemd/netif/leases/3:DNS=217.237.150.115 217.237.151.205
  /run/systemd/netif/links/3:DNS=217.237.150.115 217.237.151.205
  /run/systemd/netif/links/3:MDNS=no
  ogra@localhost:~$
+ 
+ SRU INFORMATION
+ ===
+ Test case:
+ 
+ I cannot reproduce this in a VM or normal laptop, this is somehow
+ specific to the reporter's hardware/DHCP server config.
+ 
+  * Configure systemd-networkd for an ethernet interface, either directly or 
via netplan; remove it from /etc/network/interfaces{,.d}
+  * Reboot.
+  * With current xenial's systemd, if /run/systemd/netif/state does not have 
"DNS=" then /etc/resolv.conf will not have any nameserver.
+  * With the proposed update, /etc/resolv.conf should have the DHCP-provided 
nameserver.
+ 
+ Regression potential: Low; in 16.04 LTS we do not configure networkd by
+ any Ubuntu tool, so networkd is not widely used there yet. For systems
+ which do use it it could happen that interface-specific DNS servers now
+ appear in resolv.conf that should not be global -- but we do not have
+ anything that would configure or obey this setup in 16.04.

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Title:
  /etc/resolv.conf is empty on snappy

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[Bug 1620559] Re: /etc/resolv.conf is empty on snappy

[Martin Pitt]

** Tags added: hw-specific

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Title:
  /etc/resolv.conf is empty on snappy

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[Bug 1620559] Re: /etc/resolv.conf is empty on snappy

[Martin Pitt]

This is a bug in systemd-networkd-resolvconf-update.service, apparently
/run/systemd/netif/state does not always get the received DNS servers.
This does not affect yakkety any more as this hackish thing is gone
entirely and replaced by resolved.

But it is still relevant for xenial which snappy is based on, so we need
to SRU it there.

Quick fix for snappy image builds until this is SRUed:

   sed '/^ExecStart=/ s!netif/state!& /run/systemd/netif/leases/* | sort
-u!' /lib/systemd/system/systemd-networkd-resolvconf-update.service

** Also affects: systemd (Ubuntu Xenial)
   Importance: Undecided
   Status: New

** Changed in: systemd (Ubuntu)
   Status: New => Fix Released

** Changed in: systemd (Ubuntu Xenial)
   Status: New => In Progress

** Changed in: systemd (Ubuntu Xenial)
   Importance: Undecided => High

** Changed in: systemd (Ubuntu)
   Importance: Critical => Undecided

** Changed in: systemd (Ubuntu Xenial)
 Assignee: (unassigned) => Martin Pitt (pitti)

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Title:
  /etc/resolv.conf is empty on snappy

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