I've been working on reviewing this over the last few days. Thanks to everyone for your help and patience, especially Mathieu, LaMont and Scott for your in-person interactive responses.
We've had various review feedback loops and settled on using the MPs for coordination. When everyone (including me, for ~ubuntu-sru) is happy, we can upload and accept from the unapproved queue all at once. >From a code review perspective, I'm done, though am waiting for the agreed fixes to come through (and be checked by everyone relevant). >From a QA review perspective, I would like a comprehensive test plan for existing ip= use cases given the previous regressions that we've had. There isn't currently anything on this in the bug description. As we've been delayed enough already, I think it's OK to accept the agreed changes into xenial-proposed now, provided that we agree on a regression test plan and perform it before marking verification-done. For everyone, here's the current status for Xenial. Needed before accepting into xenial-proposed: [cyphermox] initramfs-tools MP, and reviews from everyone [smoser] isc-dhcp MP: Scott's review [not rbasak] initramfs-tools upload from MP (blocked on MP and reviews) [not rbasak] isc-dhcp upload from MP (blocked on MP review) [rbasak] Check and accept from Xenial unapproved (blocked on above except for open-iscsi; might as well do all three together when ready) Needed before accepting into xenial-updates: Write a comprehensive test plan for existing ip= use cases given the previous regressions. [rbasak or another ~ubuntu-sru] Agree on test plan. All SRU review bugfixes incorporated into Zesty. Standard test case verification for the problem we're fixing (ip6= function). Mark verification-done (blocked on all of the above). -- 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/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) Bugs related to uploads for this specific SRU: cloud-init: bug 1460715: different fix unrelated to this SRU bug 1639930: ip6= on kernel command line bug 1642679: different fix unrelated to this SRU bug 1644043: different fix unrelated to this SRU ifupdown: bug 1629972: networking.service takes down lo on stop initramfs-tools: bug 1621507: no IPv6 DHCP support in early boot bug 1628306: regression-update (failure when ip="") bug 1631474: regression-update (failure when ip=:::::eth0:dhcp) isc-dhcp: bug 1621507: no IPv6 DHCP support in early boot bug 1633479: dhclient does not wait for IPv6 DAD open-iscsi: bug 1621507: no IPv6 DHCP support in early boot [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 -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
