This bug was fixed in the package initramfs-tools - 0.145ubuntu2
---------------
initramfs-tools (0.145ubuntu2) plucky; urgency=medium
* Fix shellcheck complaints in debian/tests
* configure_networking: Configure IPv4 or IPv6 based on iBFT IP address
(LP: #2091904)
* test:
- support setting a disk label in build_fs_ext2
- test-common: move disc logic out of _run_qemu
- move wait_for_server_startup to test-common
- check for QEMU PID in wait_for_server_startup
- Add qemu-net-iscsi autopkgtest for iBFT test cases
-- Benjamin Drung <bdr...@ubuntu.com> Thu, 06 Feb 2025 22:21:42 +0100
** Changed in: initramfs-tools (Ubuntu)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/2091904
Title:
IPv6 iBFT boot runs into a timeout
Status in initramfs-tools package in Ubuntu:
Fix Released
Status in open-iscsi package in Ubuntu:
Confirmed
Status in initramfs-tools source package in Noble:
New
Status in open-iscsi source package in Noble:
New
Status in initramfs-tools source package in Oracular:
New
Status in open-iscsi source package in Oracular:
New
Bug description:
iSCSI Boot Firmware Table (iBFT) can provide the network configuration
that is needed to boot over iSCSI. The iBFT can contain IPv4 or IPv6
addresses. local-top/iscsi calls `configure_networking`. The default
behaviour of `configure_networking` is DHCPv4 on all available
interfaces (if ip= and ip6= are not set). If iBFT provides IPv6
addresses and no DHCPv4 server are running, `configure_networking`
will only try DHCPv4 and run into a timeout.
Placing the single line "ISCSI_AUTO=true" into
/etc/iscsi/iscsi.initramfs, or use the kernel boot line option
"iscsi_auto" will configure the network devices based on iBFT, but the
code in `local-top/iscsi` will assume that the addresses are IPv4.
dracut on the other hand has the kernel boot line parameters
`rd.iscsi.firmware=1` and `rd.iscsi.ibft` and `ibft` as option for the
`ip` parameter. The `ibft` option is a bit under documented.
https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/7/html/installation_guide/chap-
anaconda-boot-options mentions `ip=ibft` and dracut.cmdline mentions
it.
There are multiple ways to address the timeout with IPv6 iBFT:
1) Extend `local-top/iscsi` to differentiate between IPv4 and IPv6
when "iscsi_auto" is used. This information needs to be passed to
`configure_networking` to only try to bring up that device and
protocol.
2) Use `ip=ibft` as indicator to use ibft as source for the network
configuration. If no ip= parameter is set, local-top/iscsi should
default to ip=ibft when calling configure_networking.
Both solutions require passing data to configure_networking.
Requiring the user to set `ip=off ip6=on` is not a good user
experience and not a solution in my opinion.
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