Hi, I've reviewed the changes that Mathieu has suggested at https://launchpadlibrarian.net/295312215/isc-dhcp_4.3.3-5ubuntu15.2~mtrudel4_4.3.3-5ubuntu15.2~mtrudel5.diff.gz .
I'm fine to let what he has go in there. I suggest, however, that we drop the exposing of dhclient variables to the /run/net-* scripts. This can easily be accomplished by dropping the 'for prefix in' loop in debian/initramfs-tools/lib/etc/dhcp/dhclient-enter-hooks.d/config . The gain in removing that is not exposing the implementation detail or as-yet-unused variable names to the user and thus needing to support them. Adding "may be used later" type things to an SRU should be done with great hesitation. To be clear, in the /run/net-eth0.conf file, we'll have things like: * reason * ip6_address in addition to things like: * IPV6ADDR The lower case variables are copied through from dhclient-script's environment, and are dhclient specific. Going forward these may be hard to support if Ubuntu ever moved off dhclient (such as to networkd). I'm willing to leave that up to the SRU team to decide, but feel that it should be identified. I'm OK with it going in as it is, I'll not fight this any more. -- 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: Triaged Status in isc-dhcp source package in Xenial: In Progress 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: In Progress 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. 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. 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
