** Description changed: 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. [Tests for verification] Whoever checks the last one off, please mark verification done. MAAS test cases: [+] MAAS on IPv6-only network [+] MAAS on IPv4-only network - [+] MAAS booting IPv4 on dual-stack network - [+] MAAS booting IPv6 on dual-stack network + [+] MAAS booting IPv4 on dual-stack network (with and without dhcp6) + [+] MAAS booting IPv6 on dual-stack network (with and without dhcp4) Non-MAAS test cases: + [ ] ip="" and ip6 not present + [ ] ip=:::::eth0:dhcp and ip6 not present [ ] d-i install with iSCSI remote root should complete normally [+] Validate normal boot without remote root [ ] Booting an iSCSI remote root via IPv4 (using ip=) [ ] Booting an iSCSI remote root via IPv6 (using ip6=) [ ] Booting an iSCSI remote root via IPv4 (no ip=, d-i use case) [ ] Booting an iSCSI remote root via IPv6 (no ip6=, d-i use case) [ ] Booting an iSCSI remote root with BOOTIF specified (BOOTIF=mac of booting device) [ ] Booting an iSCSI remote root on mixed network with no options (IPv4 should be used only)
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1621507 Title: initramfs-tools configure_networking() fails to dhcp ipv6 addresses To manage notifications about this bug go to: https://bugs.launchpad.net/maas/+bug/1621507/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
