[Bug 1621507] Re: initramfs-tools configure_networking() fails to dhcp ipv6 addresses
Launchpad Bug Tracker
1621507 at bugs.launchpad.net
Fri Dec 9 09:19:13 UTC 2016
** Merge proposal linked:
https://code.launchpad.net/~cyphermox/ubuntu/+source/isc-dhcp/+git/isc-dhcp/+merge/312891
--
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to isc-dhcp in Ubuntu.
https://bugs.launchpad.net/bugs/1621507
Title:
initramfs-tools configure_networking() fails to dhcp ipv6 addresses
Status in MAAS:
Fix Committed
Status in initramfs-tools package in Ubuntu:
Fix Released
Status in isc-dhcp package in Ubuntu:
Fix Released
Status in klibc package in Ubuntu:
Won't Fix
Status in open-iscsi package in Ubuntu:
In Progress
Status in initramfs-tools source package in Xenial:
Fix Committed
Status in isc-dhcp source package in Xenial:
Fix Committed
Status in klibc source package in Xenial:
Won't Fix
Status in open-iscsi source package in Xenial:
Fix Released
Status in initramfs-tools source package in Yakkety:
Fix Committed
Status in isc-dhcp source package in Yakkety:
Fix Committed
Status in klibc source package in Yakkety:
Won't Fix
Status in open-iscsi source package in Yakkety:
Fix Released
Status in klibc package in Debian:
New
Bug description:
initramfs' configure_networking function uses ipconfig to configure the network.
ipconfig does not support dhcpv6. See: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=627164
Related bugs:
* bug 1229458: grub2 needed changes
* bug 1621615: network not configured when ipv6 netbooted into cloud-init
* bug 1635716: Can't bring up a machine on a dual network (ipv4 and ipv6)
[Impact]
It is not possible to netboot Ubuntu with a network-based root
filesystem in an ipv6-only environment. Anyone wanting to netboot in
an ipv6-only environment is affected.
[Stable Fix]
These uploads add "ip6=" to the command line syntax to configure ipv6
using the defacto isc-dhcp-client. IPv4 configuration (and "ip="
syntax) remain unchanged.
Valid format for the ip6= command line option is:
ip6=none (or ip6=off or ip6=) -- do not configure ipv6
ip6=DEVICE -- run IPv6 dhclient on device DEVICE.
[Test Case]
See Bug 1229458. Configure radvd, dhcpd, and tftpd for your ipv6-only
netbooting world. Pass the boot process an ipv6 address to talk to,
and see it fail to configure the network.
[Regression Potential]
1) This increases the uncompressed initramfs size by approximately 500KB, since isc-dhcp-client is added, but klibc is still needed for some other things, and is therefore present. On systems with a very small /boot partition, this could result in failure to upgrade the initramfs.
2) In at least some cases, DHCP network configuration shifts from klibc's ipconfig to isc-dhcp-client's dhclient. This should be of minimal risk, as isc-dhcp-client is in very very widespread use. In the event of a regression, network boot would fail, but the prior kernel should still be bootable.
To manage notifications about this bug go to:
https://bugs.launchpad.net/maas/+bug/1621507/+subscriptions
More information about the foundations-bugs
mailing list