On Fri, Mar 12, 2021 at 10:45 PM Date Huang <1918...@bugs.launchpad.net> wrote: > > After reading log in #14, and some code from cloud-init and maas > I still cannot find any code that will let cloud-init try to install > flash-kernel wtih zfsutils-linux. > and it seems the error because squashfs didn't have any kernel installed. > So `linux-version` cannot find any kernel version to pass to flash-kernel to > process postinst script. > `Can't find /boot/vmlinuz- (see /tmp/flash-kernel-no-kernel-error.log)` > $kvers is empty.
I added some debugging and found that this is what causes flash-kernel to be installed: https://git.launchpad.net/curtin/tree/curtin/deps/__init__.py?h=21.2#n57 I'm not sure what the point of that is - it probably should be removed. > and as I know, squashfs only for temp utils? > It will create an environment for curtin to install real system into disk > Am I correct? Yes, the failure in comment #14 is occurring in what we call the "ephemeral image", which only exists in memory to install an OS to the disk. Though the same image is also what is written to the disk. > Do you have any custom cloud-init config for xgene? No -dann -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1918427 Title: curtin: install flash-kernel in arm64 UEFI unexpected Status in cloud-images: Incomplete Status in curtin package in Ubuntu: New Status in linux package in Ubuntu: In Progress Bug description: I used APM Mustang which flash-kernel supported in u-boot mode. But I used it with UEFI environment. It will cause fatal error when I used ARM64 ubuntu live server ISO to install system. In code[1], this will not install `flash-kernel` for APM Mustang because of UEFI. So that means code[2] will not disable `flash-kernel` in target system, only disable `update-initramfs`. When curtin execute to `install_kernel` stage, code[3,4] will not install `flash-kernel` either. But in code[5], it will install `linux-generic`. `linux-generic` has a long dependency tree and it will get `flash-kernel` in Recommended field. Apt by default will install Recommended package before kernel is installed.[6] So it will still execute `zz-flash-kernel` and `flash-kernel` when installing kernel. But system didn't create any `initrd.img` ever because curtin disable `update-initramfs` in code[2]. This will cause that `flash-kernel` cannot find `initrd.img.<kvers>` and fail when installing it. This issue didn't effect all ARM64 UEFI platform because `flash-kernel` didn't support them and skip.[7] I'm not sure which is best solution for this. But I think we should apply PR-27 in `flash-kernel`[8] for enhancement and fix curtin process with this patch both. If we only apply PR-27, it should work fine as well because it will be skipped when detecting UEFI and install `flash-kernel` before `disable_update_initranfs` in ARM platform without UEFI.[9] [Patch-1,2,3] might have side effect. Picking one patch for curtin should be enough. But I need your advice for this to determine which one is better for curtin. There are two categories 1. avoid installing flash-kernel if no need, [Patch1,2] 2. always install flash-kernel in arm/arm64 and make sure it be installed before code[2] [Patch3] (I will attach patch in reply.) Thanks a lot Regards, Date [1] https://github.com/canonical/curtin/blob/master/curtin/deps/__init__.py#L57-L58 [2] https://github.com/canonical/curtin/blob/master/curtin/commands/curthooks.py#L1693-L1699 [3] https://github.com/canonical/curtin/blob/master/curtin/commands/curthooks.py#L365-L370 [4] https://github.com/canonical/curtin/blob/master/curtin/commands/curthooks.py#L311-L327 [5] https://github.com/canonical/curtin/blob/master/curtin/commands/curthooks.py#L372-L374 [6] https://github.com/Debian/apt/blob/master/apt-pkg/init.cc#L132 [7] https://salsa.debian.org/installer-team/flash-kernel/-/blob/master/functions#L787 [8] https://salsa.debian.org/installer-team/flash-kernel/-/merge_requests/27 [9] curtin will insert `flash-kernel` into `REQUIRED_EXECUTABLES` when system is arm/arm64 without UEFI. To manage notifications about this bug go to: https://bugs.launchpad.net/cloud-images/+bug/1918427/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
