[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

@zagarin please see bug 1701023

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Title:
  default gateway route not installed for bond interfaces through reboot

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Alexey Zagarin]

> In vlan ifupdown pre-up script, instead of calling ip link up for raw
device before creating vlan interface, do a full ifup for raw device.

Doing so introduces another kind of problem. Consider the following
setup:

auto eno1
iface eno1 inet dhcp

auto eno1.101
iface eno1.101 inet manual
  vlan-raw-device eno1

In this case, ifup is calling dhclient that then exits, leaving eno1
interface in a state when DHCP lease never gets renewed:

/bin/sh /lib/udev/vlan-network-interface
 \_ /bin/sh /etc/network/if-pre-up.d/vlan
 \_ ifup eno1
 \_ /bin/sh -c /sbin/dhclient -1 -v -pf /run/dhclient.eno1.pid -lf 
/var/lib/dhcp/dhclient.eno1.leases -I -df /var/lib/dhcp/dhclient6.eno1.leases 
eno1 .
 \_ /sbin/dhclient -1 -v -pf /run/dhclient.eno1.pid -lf 
/var/lib/dhcp/dhclient.eno1.leases -I -df /var/lib/dhcp/dhclient6.eno1.leases 
eno1

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

@tom-verdaat, your problem sounds like a new issue separate from bug
1636708 - can you please open a new bug.

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Robie Basak]

@Tom

Can you verify that downgrading to 1.9-3.2ubuntu1.16.04.2 and rebooting
makes the problem disappear, and that upgrading again to
1.9-3.2ubuntu1.16.04.3 and rebooting makes the problem appear again? You
can grab the older debs from
https://launchpad.net/ubuntu/+source/vlan/+publishinghistory. Click on
the version, then on your architecture from under Builds.

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Tom Verdaat]

Found this bug ticket while troubleshooting a networking issue with
bonding and vlans after upgrading the vlan package. Reported it here:
https://bugs.launchpad.net/ubuntu/+source/ifupdown/+bug/1636708/comments/11

Any chance this change caused that issue?

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  default gateway route not installed for bond interfaces through reboot

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Launchpad Bug Tracker]

This bug was fixed in the package vlan - 1.9-3ubuntu10.4

---
vlan (1.9-3ubuntu10.4) trusty; urgency=medium

  * Don't trust ifup return code, as it returns 0 on failure; call ip link
set up after ifup to force vlan raw device up. (LP: #1573272)

 -- Dan Streetman   Mon, 05 Jun 2017
12:12:01 -0400

** Changed in: vlan (Ubuntu Trusty)
   Status: Fix Committed => Fix Released

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Launchpad Bug Tracker]

This bug was fixed in the package vlan - 1.9-3.2ubuntu2.17.04.2

---
vlan (1.9-3.2ubuntu2.17.04.2) zesty; urgency=medium

  * Correct previous patch, to work for ifupdown configuration where a
vlan is configured but the vlan's raw device has no ifupdown config.
(LP: #1573272)

 -- Dan Streetman   Mon, 29 May 2017
18:13:27 -0400

** Changed in: vlan (Ubuntu Zesty)
   Status: Fix Committed => Fix Released

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Launchpad Bug Tracker]

This bug was fixed in the package vlan - 1.9-3.2ubuntu2.16.10.2

---
vlan (1.9-3.2ubuntu2.16.10.2) yakkety; urgency=medium

  * Correct previous patch, to work for ifupdown configuration where a
vlan is configured but the vlan's raw device has no ifupdown config.
(LP: #1573272)

 -- Dan Streetman   Mon, 29 May 2017
18:13:27 -0400

** Changed in: vlan (Ubuntu Yakkety)
   Status: Fix Committed => Fix Released

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

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Launchpad Bug Tracker]

This bug was fixed in the package vlan - 1.9-3.2ubuntu1.16.04.3

---
vlan (1.9-3.2ubuntu1.16.04.3) xenial; urgency=medium

  * Correct previous patch, to work for ifupdown configuration where a
vlan is configured but the vlan's raw device has no ifupdown config.
(LP: #1573272)

 -- Dan Streetman   Mon, 29 May 2017
18:13:27 -0400

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  default gateway route not installed for bond interfaces through reboot

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

Testing on trusty, same (except interface names, e.g. ens7 -> eth1, etc)
e/n/i config as comment 61.  I could not use the systemd change from
comment 8, since trusty uses upstart, and I could not find the proper
place in upstart code to introduce a delay to more easily reproduce the
bug, but I did verify that the -proposed package results in the correct
result:

$ dpkg -l | grep vlan
ii  vlan 1.9-3ubuntu10.4 

$ ip r
default via 192.168.122.1 dev eth0 
default via 1.2.3.1 dev eth1.100  metric 1000 
default via 4.5.6.1 dev bond0  metric 2000 
default via 9.8.7.1 dev bond0.200  metric 3000 
1.2.3.0/24 dev eth1.100  proto kernel  scope link  src 1.2.3.5 
4.5.6.0/24 dev bond0  proto kernel  scope link  src 4.5.6.8 
9.8.7.0/24 dev bond0.200  proto kernel  scope link  src 9.8.7.7 
192.168.122.0/24 dev eth0  proto kernel  scope link  src 192.168.122.146 


** Tags removed: verification-failed-trusty
** Tags added: verification-done-trusty

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

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  default gateway route not installed for bond interfaces through reboot

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Brian Murray]

Hello Zachary, or anyone else affected,

Accepted vlan into trusty-proposed. The package will build now and be
available at https://launchpad.net/ubuntu/+source/vlan/1.9-3ubuntu10.4
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 on 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: vlan (Ubuntu Trusty)
   Status: In Progress => Fix Committed

** Tags added: verification-needed

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

** Tags added: verification-done-artful

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Eric Desrochers]

** Tags removed: verification-done-artful

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

** Tags removed: verification-needed-trusty
** Tags added: verification-failed-trusty

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  default gateway route not installed for bond interfaces through reboot

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

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

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  default gateway route not installed for bond interfaces through reboot

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Eric Desrochers]

** Changed in: vlan (Ubuntu Trusty)
   Status: Fix Committed => In Progress

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

Additional debdiff for trusty, as ifup return code on trusty can't be
trusted.

** Patch added: "lp1573272v3-trusty.debdiff"
   
https://bugs.launchpad.net/ubuntu/+source/vlan/+bug/1573272/+attachment/4889447/+files/lp1573272v3-trusty.debdiff

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  default gateway route not installed for bond interfaces through reboot

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

Unfortunately, verification for this fails on trusty.

tl;dr:

The patches so far work to fix this on x/y/z/a, but trusty will need an
additional patch to unconditionally call 'ip link set up', since the
return code of 'ifup' on trusty can't be trusted.  I'll attach that
trusty debdiff.


Long explanation:

First, I will explain why the attached patches work, which requires
explaining the entire process of device detection to udev processing to
ifup processing.

When udev detects a network device, it matches the rule in
'/lib/udev/rules.d/NN-vlan-network-interface.rules' (the NN varies by
release).  This rule matches the 'add' for all network device, and calls
the vlan-package-provided script /lib/udev/vlan-network-interface.  This
script then does 'ifquery --list --allow auto' for a listing of all
interfaces defined in ifupdown configuration that are set to 'auto'
configuration.  If it detects that the net device that udev just
detected is defined as a 'vlan-raw-device' (or e.g. 'eth1' is part of
the name 'eth1.100' so vlan-raw-device is assumed), then this script,
called from udev, actually executes the ifupdown if-pre-up.d/vlan
script; without calling ifup!

That pre-up script is what actually creates the vlan interface; then
once the vlan interface is created, udev gets an add event for it, and
notifies ifup to actually configure it.

So now, we get to why the patches for this bug 'work'.

In the /etc/network/if-pre-up.d/vlan script, the patch makes this
change:

 if [ ! -e "/sys/class/net/$IFACE" ]; then
-   ip link set up dev $IF_VLAN_RAW_DEVICE
+# Try ifup for the raw device, if it fails then bring it up directly
+# this is required e.g. there is no configuration for the raw device
+ifup $IF_VLAN_RAW_DEVICE || ip link set up dev $IF_VLAN_RAW_DEVICE
 vconfig add $IF_VLAN_RAW_DEVICE $VLANID
 fi

This direct call to 'ifup' from the vlan pre-up script works ONLY when
the vlan script is called from the udev script /lib/udev/vlan-network-
interface.  When the vlan script is later called from ifup itself as a
pre-up script, the ifup call is detected as 'recursive locking' and
fails (except on trusty...more on that later).  However, since the vlan
pre-up script was *already* run from the udev script, nothing it does
during the ifup pre-up execution matters; it's all redundant actions.
(Note - it's *only* redundant during a device hotplug, not manual ifup -
but more on that later too).  So, it works like this:

1. One of the bond's slaves is hotplugged/enumerated and detected by
udev, which then runs ifup for it.  During its ifup, it detects its
bond-master configuration, and creates the master bond interface, and
then waits in a loop until its master is detected and enslaves itself.

2. When udev detects the bond interface, it runs the vlan-network-
interface script for it, and that detects that the bond is the vlan-raw-
device for another interface, so it calls the if-pre-up.d/vlan script;
this is done *without* the ifupdown device lock, since it's outside of
an ifup call for the bond or child vlan interface.

2a. Previously, that if-pre-up.d/vlan script would call 'ip link set up'
for the bond interface, and then create the e.g. bond0.200 vlan
interface.  It would not actually call ifup for the bond interface
though.  This resulted in udev detecting the bond.vlan interface only
slightly after the bond interface, and calling ifup for each of them
almost simultaneously; this is what caused this bug, by the ifup for the
bond.vlan interface running before the ifup for the bond interface.

2b. Now, with the patches for this bug, the if-pre-up.d/vlan script will
actually call 'ifup' for the bond interface, which does succeed since
it's called directly from the udev script, and not running inside ifup;
so the ifup bond call is able to run.  As noted, when the if-pre-
up.d/vlan script is called *again* later during the real ifup execution
for the vlan interface, the call to ifup does not succeed since it
detects a recursive call.

3.  This process works on all releases except trusty, when a vlan is
defined for a device that doesn't have any ifup configuration; e.g. if
ens7 is not configured in ifupdown, but ens7.100 is configured.  This
works in the other releases because the 'ifup ens7' call fails since
there is no ens7 configuration, and returns an error, which then causes
the 'ip link set up' call to manually bring up ens7.  However in trusty,
the 'ifup ens7' call returns success, even though there is no ens7
configuration and the interface isn't actually brought up.  That results
in ens7.100 failing to be configured, since its raw device isn't up.

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Title:
  default gateway route not installed for bond interfaces through reboot

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

Testing on xenial, same e/n/i config and ifup@.service change:

$ dpkg -l | grep vlan
ii  vlan 1.9-3.2ubuntu1.16.04.1 

$ ip r
default via 192.168.122.1 dev ens3 
default via 1.2.3.1 dev ens7.100  metric 1000 onlink 
default via 4.5.6.1 dev bond0  metric 2000 onlink 
1.2.3.0/24 dev ens7.100  proto kernel  scope link  src 1.2.3.5 
4.5.6.0/24 dev bond0  proto kernel  scope link  src 4.5.6.8 
9.8.7.0/24 dev bond0.200  proto kernel  scope link  src 9.8.7.7 
192.168.122.0/24 dev ens3  proto kernel  scope link  src 192.168.122.11


After upgrading to -proposed vlan:

$ dpkg -l | grep vlan
ii  vlan 1.9-3.2ubuntu1.16.04.3

$ ip r
default via 192.168.122.1 dev ens3 
default via 1.2.3.1 dev ens7.100  metric 1000 onlink 
default via 4.5.6.1 dev bond0  metric 2000 onlink 
default via 9.8.7.1 dev bond0.200  metric 3000 onlink 
1.2.3.0/24 dev ens7.100  proto kernel  scope link  src 1.2.3.5 
4.5.6.0/24 dev bond0  proto kernel  scope link  src 4.5.6.8 
9.8.7.0/24 dev bond0.200  proto kernel  scope link  src 9.8.7.7 
192.168.122.0/24 dev ens3  proto kernel  scope link  src 192.168.122.11 

bond0.200 gw present, ens7.100 vlan present


** Tags added: verification-done-xenial

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

Testing on yakkety, same e/n/i config and systemd ifup@.service
modification:

$ dpkg -l | grep vlan
ii  vlan   1.9-3.2ubuntu2

$ ip r
default via 192.168.122.1 dev ens3 
default via 1.2.3.1 dev ens7.100  metric 1000 onlink 
default via 4.5.6.1 dev bond0  metric 2000 onlink 
1.2.3.0/24 dev ens7.100  proto kernel  scope link  src 1.2.3.5 
4.5.6.0/24 dev bond0  proto kernel  scope link  src 4.5.6.8 
9.8.7.0/24 dev bond0.200  proto kernel  scope link  src 9.8.7.7 
192.168.122.0/24 dev ens3  proto kernel  scope link  src 192.168.122.235 


bond0.200 gw missing as expected; after upgrading to -proposed vlan:

$ dpkg -l | grep vlan
ii  vlan   1.9-3.2ubuntu2.16.10.2

$ ip r
default via 192.168.122.1 dev ens3 
default via 1.2.3.1 dev ens7.100  metric 1000 onlink 
default via 4.5.6.1 dev bond0  metric 2000 onlink 
default via 9.8.7.1 dev bond0.200  metric 3000 onlink 
1.2.3.0/24 dev ens7.100  proto kernel  scope link  src 1.2.3.5 
4.5.6.0/24 dev bond0  proto kernel  scope link  src 4.5.6.8 
9.8.7.0/24 dev bond0.200  proto kernel  scope link  src 9.8.7.7 
192.168.122.0/24 dev ens3  proto kernel  scope link  src 192.168.122.235 

bond0.200 gw present, ens7.100 vlan present

** Tags added: verification-done-yakkety

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

Testing on zesty, same e/n/i configuration as artful, same
/lib/systemd/system/ifup@.service modification to trigger bug:


$ dpkg -l | grep vlan
ii  vlan   1.9-3.2ubuntu2

$ ip r
default via 192.168.122.1 dev ens3 
default via 1.2.3.1 dev ens7.100 metric 1000 onlink 
default via 4.5.6.1 dev bond0 metric 2000 onlink 
1.2.3.0/24 dev ens7.100 proto kernel scope link src 1.2.3.5 
4.5.6.0/24 dev bond0 proto kernel scope link src 4.5.6.8 
9.8.7.0/24 dev bond0.200 proto kernel scope link src 9.8.7.7 
192.168.122.0/24 dev ens3 proto kernel scope link src 192.168.122.131 

bond0.200 gateway missing as expected.

After upgrading vlan to -proposed version, bond0.200 gateway is present
and ens7.100 vlan is configured correctly:

$ dpkg -l | grep vlan
ii  vlan   1.9-3.2ubuntu2.17.04.2

$ ip r
default via 192.168.122.1 dev ens3 
default via 1.2.3.1 dev ens7.100 metric 1000 onlink 
default via 4.5.6.1 dev bond0 metric 2000 onlink 
default via 9.8.7.1 dev bond0.200 metric 3000 onlink 
1.2.3.0/24 dev ens7.100 proto kernel scope link src 1.2.3.5 
4.5.6.0/24 dev bond0 proto kernel scope link src 4.5.6.8 
9.8.7.0/24 dev bond0.200 proto kernel scope link src 9.8.7.7 
192.168.122.0/24 dev ens3 proto kernel scope link src 192.168.122.131 


** Tags added: verification-done-zesty

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

Testing on artful:

I created a virtual guest with extra interfaces to use for testing, all
connected to a single host bridge, which are named ens7-12 in the guest.
I added e/n/i configuration to test both for the original problem for
this bug (vlan on bond loses gateway) as well as the bug introduced by
the first patch (vlan without raw device ifupdown config fails), with
this configuration:

auto ens7.100
iface ens7.100 inet static
address 1.2.3.5/24
gateway 1.2.3.1
metric 1000
vlan-raw-device ens7

auto ens8
iface ens8 inet manual
bond-master bond0

auto ens9
iface ens9 inet manual
bond-master bond0

auto bond0
iface bond0 inet static
address 4.5.6.8/24
gateway 4.5.6.1
metric 2000
bond-slaves none
bond-mode balance-alb

auto bond0.200
iface bond0.200 inet static
address 9.8.7.7/24
gateway 9.8.7.1
metric 3000
vlan-raw-device bond0


Notes:
'ens7.100' does not have any corresponding 'ens7' configuration.
'bond0' requires the 'bond-mode' option to trigger this bug, as it takes down 
the interface while changing the mode; the other options that take down the 
interface are 'xmit_hash_policy', 'ad_select', and 'lacp_rate'.

Without the modification from comment 8, I could not reproduce the bug
(as expected since it's a race condition), but with that modification I
could reproduce the bug with vlan version:

$ dpkg -l | grep vlan
ii  vlan   1.9-3.2ubuntu2

The bond0.200 gateway is missing:

$ ip r
default via 192.168.122.1 dev ens3 
default via 1.2.3.1 dev ens7.100 metric 1000 onlink 
default via 4.5.6.1 dev bond0 metric 2000 onlink 
1.2.3.0/24 dev ens7.100 proto kernel scope link src 1.2.3.5 
4.5.6.0/24 dev bond0 proto kernel scope link src 4.5.6.8 
9.8.7.0/24 dev bond0.200 proto kernel scope link src 9.8.7.7 
192.168.122.0/24 dev ens3 proto kernel scope link src 192.168.122.160 


After upgrading to vlan version:

$ dpkg -l | grep vlan
ii  vlan   1.9-3.2ubuntu4

The bond0.200 gateway is present:

$ ip r
default via 192.168.122.1 dev ens3 
default via 1.2.3.1 dev ens7.100 metric 1000 onlink 
default via 4.5.6.1 dev bond0 metric 2000 onlink 
default via 9.8.7.1 dev bond0.200 metric 3000 onlink 
1.2.3.0/24 dev ens7.100 proto kernel scope link src 1.2.3.5 
4.5.6.0/24 dev bond0 proto kernel scope link src 4.5.6.8 
9.8.7.0/24 dev bond0.200 proto kernel scope link src 9.8.7.7 
192.168.122.0/24 dev ens3 proto kernel scope link src 192.168.122.160 

Additionally, the ens7.100 vlan is correctly configured, even without
any ens7 raw device ifupdown config.

** Tags added: verification-done-artful

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Łukasz Zemczak]

Hello Zachary, or anyone else affected,

Accepted vlan into zesty-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/vlan/1.9-3.2ubuntu2.17.04.2 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 on 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: vlan (Ubuntu Zesty)
   Status: In Progress => Fix Committed

** Tags added: verification-needed

** Changed in: vlan (Ubuntu Yakkety)
   Status: In Progress => Fix Committed

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Eric Desrochers]

and a explanation has been publicly made at the attention of all SRU
members on Freenode (#ubuntu-release) to explain them the context of
this new upload to overwrite/replace the actual -proposed package(s)
having the regression.

** Tags removed: verification-needed

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Eric Desrochers]

Hi dan,

v2 debdiffs has been uploaded in the upload queue for all affected
stable releases.

- Eric


** Changed in: vlan (Ubuntu Zesty)
   Status: Fix Committed => In Progress

** Changed in: vlan (Ubuntu Yakkety)
   Status: Fix Committed => In Progress

** Changed in: vlan (Ubuntu Trusty)
   Status: Fix Committed => In Progress

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

** Tags removed: sts-sru-needed
** Tags added: sts-sru-done

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Stefan Bader]

Manually applied the fixup delta on a host which had the issue (not
having a base device configured) and it comes up with network/vlan
working (just a pre-proposed hint but I am not sure I can do a timely
verification with the proposed package).

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Launchpad Bug Tracker]

This bug was fixed in the package vlan - 1.9-3.2ubuntu4

---
vlan (1.9-3.2ubuntu4) artful; urgency=medium

  * Correct previous patch, to work for ifupdown configuration where a
vlan is configured but the vlan's raw device has no ifupdown config.
(LP: #1573272)

 -- Dan Streetman   Mon, 29 May 2017
18:13:27 -0400

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

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Eric Desrochers]

** Tags removed: sts-sru-done
** Tags added: sts-sru-needed

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Mathieu Trudel-Lapierre]

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

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

Attached v2 patches for artful and SRU releases; instead of changing the
vlan if-pre-up.d script to use only ifup instead of ip link up, change
the script to use both; first try ifup for the vlan raw device, then if
that fails (e.g. because ifupdown has no configuration for the vlan raw
device) try directly bringing up the vlan raw device using the previous
way, i.e. ip link set DEV up.

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

** Patch added: "lp1573272v2-artful.debdiff"
   
https://bugs.launchpad.net/ubuntu/+source/vlan/+bug/1573272/+attachment/4885915/+files/lp1573272v2-artful.debdiff

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

** Patch added: "lp1573272v2-trusty.debdiff"
   
https://bugs.launchpad.net/ubuntu/+source/vlan/+bug/1573272/+attachment/4885911/+files/lp1573272v2-trusty.debdiff

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

** Patch added: "lp1573272v2-zesty.debdiff"
   
https://bugs.launchpad.net/ubuntu/+source/vlan/+bug/1573272/+attachment/4885914/+files/lp1573272v2-zesty.debdiff

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

** Patch added: "lp1573272v2-yakkety.debdiff"
   
https://bugs.launchpad.net/ubuntu/+source/vlan/+bug/1573272/+attachment/4885913/+files/lp1573272v2-yakkety.debdiff

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

** Patch added: "lp1573272v2-xenial.debdiff"
   
https://bugs.launchpad.net/ubuntu/+source/vlan/+bug/1573272/+attachment/4885912/+files/lp1573272v2-xenial.debdiff

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

Note, this change breaks the system configuration where an ifupdown vlan
is configured, but the raw device is not configured in ifupdown.  I'm
working on an additional patch fix this.

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Łukasz Zemczak]

Hello Zachary, or anyone else affected,

Accepted vlan into zesty-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/vlan/1.9-3.2ubuntu2.17.04.1 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 on 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: vlan (Ubuntu Zesty)
   Status: In Progress => Fix Committed

** Tags added: verification-needed

** Changed in: vlan (Ubuntu Yakkety)
   Status: In Progress => Fix Committed

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Eric Desrochers]

** Tags removed: patch sts-sru-needed
** Tags added: sts-sru-done

** Changed in: vlan (Ubuntu Zesty)
 Assignee: (unassigned) => Dan Streetman (ddstreet)

** Changed in: vlan (Ubuntu Yakkety)
 Assignee: (unassigned) => Dan Streetman (ddstreet)

** Changed in: vlan (Ubuntu Xenial)
 Assignee: (unassigned) => Dan Streetman (ddstreet)

** Changed in: vlan (Ubuntu Trusty)
 Assignee: (unassigned) => Dan Streetman (ddstreet)

** Changed in: vlan (Ubuntu Trusty)
   Status: New => In Progress

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

** Changed in: vlan (Ubuntu Yakkety)
   Status: New => In Progress

** Changed in: vlan (Ubuntu Zesty)
   Status: New => In Progress

** Changed in: vlan (Ubuntu Trusty)
   Importance: Undecided => Medium

** Changed in: vlan (Ubuntu Xenial)
   Importance: Undecided => Medium

** Changed in: vlan (Ubuntu Zesty)
   Importance: Undecided => Medium

** Changed in: vlan (Ubuntu Yakkety)
   Importance: Undecided => Medium

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Launchpad Bug Tracker]

This bug was fixed in the package vlan - 1.9-3.2ubuntu3

---
vlan (1.9-3.2ubuntu3) artful; urgency=medium

  * In vlan ifupdown pre-up script, instead of calling ip link up for
raw device before creating vlan interface, do a full ifup for raw
device.  Otherwise, if raw device processes ifup after vlan device,
the raw device may be taken down and back up, which removes all vlan
routes and other configuration. (LP: #1573272)

 -- Dan Streetman   Thu, 30 Mar 2017
09:16:10 -0400

** Changed in: vlan (Ubuntu Artful)
   Status: In Progress => Fix Released

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Eric Desrochers]

** Also affects: vlan (Ubuntu Zesty)
   Importance: Undecided
   Status: New

** Also affects: vlan (Ubuntu Yakkety)
   Importance: Undecided
   Status: New

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

** Also affects: vlan (Ubuntu Trusty)
   Importance: Undecided
   Status: New

** Also affects: vlan (Ubuntu Artful)
   Importance: Medium
 Assignee: Dan Streetman (ddstreet)
   Status: In Progress

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

smoser, stgraber, you guys have done some ifupdown and/or vlan
uploads/changes before...can either of you review and/or sponsor this
into artful?

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

> The reentrancy is a red flag for me. Is there an existing example of ifup 
> being
> called from an if-pre-up.d script?

yes, the ifenslave if-pre-up.d script does call ifup for all its slave
interfaces, i.e.:

# Bring up slave if it is the target of an allow-bondX stanza.
# This is usefull to bring up slaves that need extra setup.
if [ -z "$(which ifquery)" ] || ifquery --allow \"$BOND_MASTER\" --list | grep 
-q $slave; then
ifup $v --allow "$BOND_MASTER" "$slave"
fi


> I think it would be best to get a review from someone more familiar with this
> area before upload.

ok I'll ping one of the ifupdown-related coredevs.

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Robie Basak]

Hi Dan,

I'm not particularly familiar with ifupdown. The reentrancy is a red
flag for me. Is there an existing example of ifup being called from an
if-pre-up.d script?

I think it would be best to get a review from someone more familiar with
this area before upload.

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

** Patch removed: "lp1573272-zesty.debdiff"
   
https://bugs.launchpad.net/ubuntu/+source/vlan/+bug/1573272/+attachment/4850620/+files/lp1573272-zesty.debdiff

** Patch removed: "lp1573272-yakkety.debdiff"
   
https://bugs.launchpad.net/ubuntu/+source/vlan/+bug/1573272/+attachment/4850619/+files/lp1573272-yakkety.debdiff

** Patch removed: "lp1573272-xenial.debdiff"
   
https://bugs.launchpad.net/ubuntu/+source/vlan/+bug/1573272/+attachment/4850618/+files/lp1573272-xenial.debdiff

** Patch added: "lp1573272-xenial.debdiff"
   
https://bugs.launchpad.net/ubuntu/+source/vlan/+bug/1573272/+attachment/4881557/+files/lp1573272-xenial.debdiff

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

** Patch added: "lp1573272-zesty.debdiff"
   
https://bugs.launchpad.net/ubuntu/+source/vlan/+bug/1573272/+attachment/4881559/+files/lp1573272-zesty.debdiff

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

Robie, you uploaded the last couple vlan pkg changes, can you
review/sponsor this change also?

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

updated release debdiffs to correct version numbers, and add debdiff for
artful.

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

** Patch added: "lp1573272-artful.debdiff"
   
https://bugs.launchpad.net/ubuntu/+source/vlan/+bug/1573272/+attachment/4881560/+files/lp1573272-artful.debdiff

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

** Patch added: "lp1573272-yakkety.debdiff"
   
https://bugs.launchpad.net/ubuntu/+source/vlan/+bug/1573272/+attachment/4881558/+files/lp1573272-yakkety.debdiff

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

** Tags removed: sts-sponsor
** Tags added: sts-sru-needed

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Gaël THEROND]

Thanks a lot Dan and Jared.

As this node is intended to be used on a critical production service,
I'll rather wait for the patch rolling from ubuntu repos.

In order to be sure that it will fix the issue, I've patch the script
file manually and it working fine.

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

Right, this isn't fixed yet.  I'll try to get this into Artful asap.

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Jared Baker]

@Gael from what I can tell the fix has not been released based on this
bug status is still 'in progress'.

I'm running Ubuntu 16.04 with vlan 1.9-3.2ubuntu1 and it still contains
the 'ip link set up dev $IF_VLAN_RAW_DEVICE' on line 63 of /etc/network
/if-pre-up.d/vlan . You can modify the file yourself using Dan's
instructions on step 9. Works like a charm for me.

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Gaël THEROND]

This doesn't seems to be a kernel issue as I'm having the exact same
issue with a fresh Ubunutu 16.04.2 LTS using a 4.4.0 kernel serie and a
vlan 1.9.3 package on top of the bonding interface.

I can confirm that this bug is also impacting the dns resolution as even
when the vlan interface is filled with the dns-nameserver information
the node is not able to resolve a damn domain . It is however able to
ping the nameserver.

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[goldyfruit]

@Dan, I filled a bug about it, seems to be an issue with kernel 4.10:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1679823

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

> I don't know if it's related but since the I'm using this vlan package
I have this issue:

it's hard to tell just from that output, what does your interfaces
file(s) look like?

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[goldyfruit]

Only few of them still down:


# ip l
1: lo:  mtu 65536 qdisc noqueue state UNKNOWN mode 
DEFAULT group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eno49:  mtu 9000 qdisc mq master 
bond0 state UP mode DEFAULT group default qlen 1000
link/ether 5c:b9:01:8a:5e:7d brd ff:ff:ff:ff:ff:ff
3: eno50:  mtu 9000 qdisc mq master 
bond0 state UP mode DEFAULT group default qlen 1000
link/ether 5c:b9:01:8a:5e:7d brd ff:ff:ff:ff:ff:ff
4: ens2f0:  mtu 1500 qdisc noop state DOWN mode DEFAULT 
group default qlen 1000
link/ether 8c:dc:d4:ae:7e:b0 brd ff:ff:ff:ff:ff:ff
5: ens2f1:  mtu 1500 qdisc noop state DOWN mode DEFAULT 
group default qlen 1000
link/ether 8c:dc:d4:ae:7e:b1 brd ff:ff:ff:ff:ff:ff
6: bond0:  mtu 1500 qdisc noqueue state 
UP mode DEFAULT group default qlen 1000
link/ether 5c:b9:01:8a:5e:7d brd ff:ff:ff:ff:ff:ff
7: bond0.53@bond0:  mtu 1500 qdisc noop state DOWN mode 
DEFAULT group default qlen 1000
link/ether 5c:b9:01:8a:5e:7d brd ff:ff:ff:ff:ff:ff
8: bond0.59@bond0:  mtu 1500 qdisc noqueue 
state UP mode DEFAULT group default qlen 1000
link/ether 5c:b9:01:8a:5e:7d brd ff:ff:ff:ff:ff:ff
9: bond0.70@bond0:  mtu 1500 qdisc noqueue 
state UP mode DEFAULT group default qlen 1000
link/ether 5c:b9:01:8a:5e:7d brd ff:ff:ff:ff:ff:ff
10: bond0.73@bond0:  mtu 1500 qdisc noop state DOWN mode 
DEFAULT group default qlen 1000
link/ether 5c:b9:01:8a:5e:7d brd ff:ff:ff:ff:ff:ff
11: bond0.76@bond0:  mtu 1500 qdisc noqueue 
state UP mode DEFAULT group default qlen 1000
link/ether 5c:b9:01:8a:5e:7d brd ff:ff:ff:ff:ff:ff
12: docker0:  mtu 1500 qdisc noqueue state 
DOWN mode DEFAULT group default 
link/ether 02:42:90:e0:70:68 brd ff:ff:ff:ff:ff:ff


# cat /proc/net/vlan/config 
VLAN Dev name| VLAN ID
Name-Type: VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD
bond0.53   | 53  | bond0
bond0.59   | 59  | bond0
bond0.70   | 70  | bond0
bond0.73   | 73  | bond0
bond0.76   | 76  | bond0

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[goldyfruit]

I don't know if it's related but since the I'm using this vlan package I
have this issue:

Apr 04 17:08:30 compute001 ifup[2396]: Waiting for a slave to join bond0 (will 
timeout after 60s)
Apr 04 17:08:30 compute001 ifup[2396]: ifquery: recursion detected for 
interface bond0 in pre-up phase
Apr 04 17:08:30 compute001 ifup[2396]: ifquery: recursion detected for parent 
interface bond0 in pre-up phase
Apr 04 17:08:30 compute001 ifup[2396]: ifquery: recursion detected for parent 
interface bond0 in pre-up phase
Apr 04 17:08:30 compute001 ifup[2396]: ifquery: recursion detected for parent 
interface bond0 in pre-up phase
Apr 04 17:08:30 compute001 ifup[2396]: ifquery: recursion detected for parent 
interface bond0 in pre-up phase
Apr 04 17:08:30 compute001 ifup[2396]: ifquery: recursion detected for parent 
interface bond0 in pre-up phase
Apr 04 17:08:30 compute001 ifup[2396]: RTNETLINK answers: Invalid argument
Apr 04 17:08:30 compute001 ifup[2396]: Failed to bring up bond0.
Apr 04 17:08:30 compute001 ifup[2396]: Set name-type for VLAN subsystem. Should 
be visible in /proc/net/vlan/config
Apr 04 17:08:30 compute001 ifup[2396]: RTNETLINK answers: Invalid argument
Apr 04 17:08:30 compute001 ifup[2396]: RTNETLINK answers: File exists
Apr 04 17:08:30 compute001 ifup[2396]: Failed to bring up bond0.53.
Apr 04 17:08:30 compute001 ifup[2396]: Set name-type for VLAN subsystem. Should 
be visible in /proc/net/vlan/config
Apr 04 17:08:30 compute001 ifup[2396]: RTNETLINK answers: File exists
Apr 04 17:08:30 compute001 ifup[2396]: Failed to bring up bond0.70.
Apr 04 17:08:30 compute001 ifup[2396]: Set name-type for VLAN subsystem. Should 
be visible in /proc/net/vlan/config
Apr 04 17:08:30 compute001 ifup[2396]: RTNETLINK answers: Invalid argument
Apr 04 17:08:30 compute001 ifup[2396]: RTNETLINK answers: File exists
Apr 04 17:08:30 compute001 ifup[2396]: Failed to bring up bond0.73.
Apr 04 17:08:30 compute001 systemd[1]: networking.service: Main process exited, 
code=exited, status=1/FAILURE
Apr 04 17:08:30 compute001 systemd[1]: Failed to start Raise network interfaces.
-- Subject: Unit networking.service has failed


# apt show vlan
Package: vlan
Version: 1.9-3.2ubuntu1.16.04.1+hf1573272v20170330b1

# uname -r
4.10.0-14-generic

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[goldyfruit]

The patch fixes the issue for me as well. Thanks !

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Bug Watch Updater]

** Changed in: vlan (Debian)
   Status: Unknown => New

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

I created a PPA with fixed vlan packages:
https://launchpad.net/~ddstreet/+archive/ubuntu/lp1573272


** Tags removed: bot-comment patch xenial
** Tags added: sts-sponsor

** Tags added: patch

** Also affects: vlan (Debian) via
   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=859127
   Importance: Unknown
   Status: Unknown

** No longer affects: ifupdown (Ubuntu)

** Changed in: vlan (Ubuntu)
   Importance: High => Medium

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Ubuntu Foundations Team Bug Bot]

The attachment "lp1573272-trusty.debdiff" seems to be a debdiff.  The
ubuntu-sponsors team has been subscribed to the bug report so that they
can review and hopefully sponsor the debdiff.  If the attachment isn't a
patch, please remove the "patch" flag from the attachment, remove the
"patch" tag, and if you are member of the ~ubuntu-sponsors, unsubscribe
the team.

[This is an automated message performed by a Launchpad user owned by
~brian-murray, for any issue please contact him.]

** Tags added: patch

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

** Description changed:

- Expectation:  After reboot, route for default gateway specified on
- bonded interface is installed according to "gateway x.x.x.x"  (where
- x.x.x.x is a valid IPv4 address) specified in /etc/network/interfaces or
- files sourced per /etc/network/interfaces
+ [Impact]
+ 
+ Systems using vlans, especially those using vlans on top of bond
+ interfaces, in addition to default or other routes on the vlans, may
+ find their vlan routes are not present at boot.
+ 
+ The attached debdiff patches fix the vlan package's /etc/network/if-pre-
+ up.d/vlan script.  Currently, the script will bring up a vlan's raw
+ device if needed; but the problem is if the vlan's ifup processing
+ happens before the raw device's ifup processing, the raw device may be
+ taken down and back up (especially for bonds), and when the raw device
+ is taken down, the vlan is as well, and thus loses all its routing
+ configuration.  Instead of only bringing the raw device up using ip link
+ up, the patch changes the vlan script to do a full ifup on the raw
+ device, so it will remain up after the vlan is configured.
+ 
+ [Test Case]
+ 
+ Set up a system using two interfaces configured into a bond interface,
+ with a vlan on top of that bond.  Add a default route and/or specific
+ routes to the vlan interface.  Then edit the system as described in
+ comment 8, and reboot.  The vlan's routes will not be present in the
+ system.
+ 
+ [Regression Potential]
+ 
+ Any modifications to ifupdown or the scripts it uses may cause wider
+ problems with network configuration.  Specifically, this could cause
+ problems when using vlan interfaces, as it forces every vlan's raw
+ device interface to be fully ifup'ed before the vlan interface can
+ finish its ifup.
+ 
+ [Other Info]
+ 
+ original description below:
+ 
+ 
+ Expectation:  After reboot, route for default gateway specified on bonded 
interface is installed according to "gateway x.x.x.x"  (where x.x.x.x is a 
valid IPv4 address) specified in /etc/network/interfaces or files sourced per 
/etc/network/interfaces
  
  Actual Result: After reboot, route is not installed. Interface does work
  otherwise (I can ping the gateway on that subnet, for instance).
  'ifdown -a' followed by  'ifup -a' (run with proper permission... so
  sudo) brings the gateway back until next reboot.
  
  Package:  I'm not familiar enough to be certain what is causing this,
  but I was seeing this in beta2 of 16.04 as well.
  
  *username snipped*@*hostname snipped*:~$ lsb_release -rd
  Description:Ubuntu 16.04 LTS
  Release:16.04
  *username snipped*@*hostname snipped*:~$ apt-cache policy ifenslave
  ifenslave:
-   Installed: 2.7ubuntu1
-   Candidate: 2.7ubuntu1
-   Version table:
-  *** 2.7ubuntu1 100
- 100 /var/lib/dpkg/status
+   Installed: 2.7ubuntu1
+   Candidate: 2.7ubuntu1
+   Version table:
+  *** 2.7ubuntu1 100
+ 100 /var/lib/dpkg/status
  
  *username snipped*@*hostname snipped*:~$ apt-cache policy ifupdown
  ifupdown:
-   Installed: 0.8.10ubuntu1
-   Candidate: 0.8.10ubuntu1
-   Version table:
-  *** 0.8.10ubuntu1 100
- 100 /var/lib/dpkg/status
- 
- 
-   
+   Installed: 0.8.10ubuntu1
+   Candidate: 0.8.10ubuntu1
+   Version table:
+  *** 0.8.10ubuntu1 100
+ 100 /var/lib/dpkg/status
  
- 
- 
- 
-   /etc/network/interfaces
+   /etc/network/interfaces
  
  --
  # This file describes the network interfaces available on your system
  # and how to activate them. For more information, see interfaces(5).
  
  source /etc/network/interfaces.d/*
  
  # The loopback network interface
  auto lo
  iface lo inet loopback
  
  # The primary network interface
  auto enp2s0f1
  iface enp2s0f1 inet manual
  bond-master bond0
  
  auto enp2s0f0
  iface enp2s0f0 inet manual
  bond-master bond0
  
  auto bond0
  iface bond0 inet static
- address 10.96.96.2
- netmask 255.255.255.0
- network 10.96.96.0
- broadcast 10.96.96.255
- # dns-* options are implemented by the resolvconf package, if 
installed
- dns-search *snip*
- bond-mode balance-alb
- bond-slaves none
- bond-miimon 100
- auto bond0.3000 
+ address 10.96.96.2
+ netmask 255.255.255.0
+ network 10.96.96.0
+ broadcast 10.96.96.255
+ # dns-* options are implemented by the resolvconf package, if 
installed
+ dns-search *snip*
+ bond-mode balance-alb
+ bond-slaves none
+ bond-miimon 100
+ auto bond0.3000
  iface bond0.3000 inet static
- address 172.21.33.29
- netmask 255.255.255.0
- network 172.21.33.0
- broadcast 172.21.33.255
- gateway 172.21.33.1
- dns-search *snip*
- vlan-raw-device bond0
- dns-nameservers 172.31.10.84 8.8.8.8 4.2.2.2
- 
+ address 172.21.33.29
+ netmask 255.255.255.0
+ network 172.21.33.0
+    

[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=859127

** Bug watch added: Debian Bug tracker #859127
   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=859127

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

** Patch added: "lp1573272-xenial.debdiff"
   
https://bugs.launchpad.net/ubuntu/+source/vlan/+bug/1573272/+attachment/4850618/+files/lp1573272-xenial.debdiff

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

** Patch added: "lp1573272-trusty.debdiff"
   
https://bugs.launchpad.net/ubuntu/+source/vlan/+bug/1573272/+attachment/4850617/+files/lp1573272-trusty.debdiff

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

** Patch added: "lp1573272-zesty.debdiff"
   
https://bugs.launchpad.net/ubuntu/+source/vlan/+bug/1573272/+attachment/4850620/+files/lp1573272-zesty.debdiff

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

** Patch added: "lp1573272-yakkety.debdiff"
   
https://bugs.launchpad.net/ubuntu/+source/vlan/+bug/1573272/+attachment/4850619/+files/lp1573272-yakkety.debdiff

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

Marking this as 'invalid' for ifupdown, as the problem is in the vlan
package's script.

** Also affects: vlan (Ubuntu)
   Importance: Undecided
   Status: New

** Changed in: vlan (Ubuntu)
 Assignee: (unassigned) => Dan Streetman (ddstreet)

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

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

** Changed in: ifupdown (Ubuntu)
   Status: Confirmed => Invalid

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Title:
  default gateway route not installed for bond interfaces through reboot

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

Thanks everyone, I'll work on getting the patch upstream.

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  default gateway route not installed for bond interfaces through reboot

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Andrey Omelchenko]

The patch fixes the issue for me as well. Thank you!

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  default gateway route not installed for bond interfaces through reboot

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Sander van Schie]

The patch fixes the issue for me as well.

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  default gateway route not installed for bond interfaces through reboot

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Nica]

confirm, the patch is working for me as well.

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  default gateway route not installed for bond interfaces through reboot

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[YannTech]

Seems OK for me

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  default gateway route not installed for bond interfaces through reboot

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

This patch to the vlan pre-up script should fix this bug, can someone
who can easily reproduce it please update your system and retest to
verify it fixes the bug?  You can just hand-edit your vlan script as
shown, to replace the call to ip to instead do a full ifup on the raw
device.


--- /etc/network/if-pre-up.d/vlan.orig  2017-03-16 16:50:37.97200 +
+++ /etc/network/if-pre-up.d/vlan   2017-03-16 16:50:45.05600 +
@@ -60,7 +60,7 @@
 exit 1
 fi
 if [ ! -e "/sys/class/net/$IFACE" ]; then
-ip link set up dev $IF_VLAN_RAW_DEVICE
+ifup $IF_VLAN_RAW_DEVICE
 vconfig add $IF_VLAN_RAW_DEVICE $VLANID
 fi
 fi


** Changed in: ifupdown (Ubuntu)
 Assignee: (unassigned) => Dan Streetman (ddstreet)

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

Ok I've reproduced this by introducing a delay by changing
/lib/systemd/system/ifup@.service

-ExecStart=/bin/sh -ec 'ifup --allow=hotplug %I; ifup --allow=auto %I; \
+ExecStart=/bin/sh -ec '/usr/bin/test %I == bond0 && echo found bond0 && sleep 
3 ; ifup --allow=hotplug %I; ifup --allow=auto %I; \

that reproduces this by allowing bond0.3000 to complete ifup before
bond0 is processed, and when bond0 is ifup'ed it clears bond0.3000's
gateway due to bond0 going down and back up.

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Dan Streetman]

I set up a default xenial vm with 2 extra interfaces, and configured
them with exactly the config you listed in the description, and left it
in a reboot loop checking for the default gateway each time, and it
hasn't seen the problem at all, after hours of rebooting.  Is there a
something else specific needed to be able to reproduce this problem?

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  default gateway route not installed for bond interfaces through reboot

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[goldyfruit]

Any idea if an upstream fix will be applied on Xenial ?
It's a very annoying issue :/

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Jaakko Salo]

As a workaround, you can do the following (using the original report's
config as an example):

# systemctl edit ifup@bond0.3000

Add the following and save the file:

[Unit]
After=ifup@bond0.service

Then, let's add Type=oneshot to the ifup@ template so that the above
After= actually has some effect:

# systemctl edit ifup@

Add the following and save the file:

[Service]
Type=oneshot

Then reboot.

The problem seems to be a race condition introduced with systemd
integration. For me, the missing default route triggered around 80% of
the time, but not always.

On Ubuntu 16, systemd executes the ifup@ template units in parallel in a
way that is not adequately controlled. For instance, ifup@bond0.3000 and
ifup@bond0 will execute in parallel. The ifup for bond0 will involve "ip
link ... down", then "up" from ifenslave hooks. I believe that if the
link down comes after default route from bond0.3000, the default route
will be deleted. My journalctl observations support this.

Debugging tip: use systemctl edit ifup@, and add --verbose to the ifup
invocations (note, there are 2 of them!). Adding the verbose option to
/etc/default/networking does not work, except for lo interface.

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[James]

Able to replicate this very reliably with any bonded interface on Xenial

Default Gateway (configured in e/n/i) is never set on boot, but always
set with any interface raise thereafter.

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[just me]

i think this affects more than just "bond" interfaces, and more than
just the gateway setting from /etc/network/interfaces. i think dns-
settings are also affected as experienced on 4 of my systems. note bug
#1628552

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Alberto Salvia Novella]

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

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: ifupdown (Ubuntu)
   Status: New => Confirmed

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

[Brian Murray]

** Tags added: xenial

** Package changed: ubuntu => ifupdown (Ubuntu)

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[Bug 1573272] Re: default gateway route not installed for bond interfaces through reboot

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Ubuntu better.  It seems that your bug report is not filed about a
specific source package though, rather it is just filed against Ubuntu
in general.  It is important that bug reports be filed about source
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