** Also affects: initramfs-tools (Ubuntu Yakkety)
Importance: High
Assignee: Mathieu Trudel-Lapierre (cyphermox)
Status: In Progress
** Also affects: klibc (Ubuntu Yakkety)
Importance: Undecided
Status: Won't Fix
** Also affects: open-iscsi (Ubuntu Yakkety)
Importance: High
Status: Fix Released
** Also affects: isc-dhcp (Ubuntu Yakkety)
Importance: High
Assignee: Mathieu Trudel-Lapierre (cyphermox)
Status: Fix Released
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https://bugs.launchpad.net/bugs/1621507
Title:
initramfs-tools configure_networking() fails to dhcp ipv6 addresses
Status in MAAS:
Fix Released
Status in initramfs-tools package in Ubuntu:
In Progress
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:
Fix Released
Status in initramfs-tools source package in Xenial:
Triaged
Status in isc-dhcp source package in Xenial:
Fix Released
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:
In Progress
Status in isc-dhcp source package in Yakkety:
Fix Released
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
[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.
These uploads address this by replacing the one-off klibc dhcp client
(IPv4-only) with the defacto standard isc-dhcp-client, and thereby
provide both ipv6 and ipv4 DHCP configuration.
[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.
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