I've verified that this fixes issue on yakkety.
## Set up a network in lxc that listens to dhcp ipv4 and ipv6
$ netname="v4and6"
$ profname="$netname-profile"
$ cnamepre="v4v6-"
$ lxc network create $netname
Network v4and6 created
$ lxc network set $netname ipv6.dhcp.stateful true
$ lxc profile create $profname
$ lxc profile device add $profname eth0 nic nictype=bridged parent=$netnam
Device eth0 added to v4and6-profile
$ lxc network show $netname
name: v4and6
config:
ipv4.address: 10.152.128.1/24
ipv4.nat: "true"
ipv6.address: fd42:198e:d2a5:1d10::1/64
ipv6.dhcp.stateful: "true"
ipv6.nat: "true"
managed: true
type: bridge
usedby: []
$ lxc profile show $profname
name: v4and6-profile
config: {}
description: ""
devices:
eth0:
nictype: bridged
parent: v4and6
type: nic
usedby: []
## Now launch a container to verify
$ rel=yakkety
$ cname=v5v6-$rel
$ lxc launch ubuntu-daily:$rel --profile=$profname $cname
$ sleep 20; # give it time to come up
% lxc exec $cname /bin/bash
## inside
$ dev=eth0;
$ ifdown $dev; ip link set down dev $dev; killall dhclient;
Killed old client process
$ dhclient -6 -1 -v $dev
...
Can't bind to dhcp address: Cannot assign requested address
Please make sure there is no other dhcp server
...
$ echo $?
1
## That verified busted. now fix.
$ ifup eth0 # brings up ipv4 dhcp properly
$ m=http://archive.ubuntu.com/ubuntu
$ echo "deb $m $(lsb_release -sc)-proposed main" | sudo tee
/etc/apt/sources.list.d/proposed.list
$ sudo apt-get install isc-dhcp-client
$ dpkg-query --show isc-dhcp-client
isc-dhcp-client 4.3.3-5ubuntu15.1
$ ifdown $dev; ip link set down dev $dev; killall dhclient;
$ dhclient -6 -1 -v $dev
...
message status code Success: "success"
PRC: Bound to lease 00:01:00:01:1f:c5:e1:fb:b8:ae:ed:75:5f:9a.
$ echo $?
0
** Tags added: verification-done-yakkety
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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to isc-dhcp in Ubuntu.
https://bugs.launchpad.net/bugs/1633479
Title:
dhclient does not wait for ipv6 dad (duplicate address detection)
Status in isc-dhcp package in Ubuntu:
Fix Released
Status in isc-dhcp source package in Precise:
Fix Committed
Status in isc-dhcp source package in Trusty:
Fix Committed
Status in isc-dhcp source package in Xenial:
Fix Released
Status in isc-dhcp source package in Yakkety:
Fix Committed
Bug description:
dhclient -6 does not wait for an interface go through duplicate address
detection.
As a result the following will almost always fail:
$ dev=eth0
$ ip link set down dev $dev
$ dhclient -6 -1 -v eth0
Internet Systems Consortium DHCP Client 4.3.3
Copyright 2004-2015 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
Can't bind to dhcp address: Cannot assign requested address
Please make sure there is no other dhcp server
running and that there's no entry for dhcp or
bootp in /etc/inetd.conf. Also make sure you
are not running HP JetAdmin software, which
includes a bootp server.
If you think you have received this message due to a bug rather
than a configuration issue please read the section on submitting
bugs on either our web page at www.isc.org or in the README file
before submitting a bug. These pages explain the proper
process and the information we find helpful for debugging..
$ echo $?
1
Related bugs:
* bug 1447715: dhclient -6: Can't bind to dhcp address: Cannot assign
requested address
* bug 1633562: 'dhclient -6 -S' does not bring interface up
ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: isc-dhcp-client 4.3.3-5ubuntu15
ProcVersionSignature: Ubuntu 4.8.0-22.24-generic 4.8.0
Uname: Linux 4.8.0-22-generic x86_64
NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
ApportVersion: 2.20.3-0ubuntu8
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Oct 14 09:18:52 2016
EcryptfsInUse: Yes
InstallationDate: Installed on 2015-07-23 (449 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150722.1)
SourcePackage: isc-dhcp
UpgradeStatus: No upgrade log present (probably fresh install)
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1633479/+subscriptions
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