install: Enable installing to multi device parents #1911
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This pull request successfully enables installing to multi-device parent filesystems, such as LVM spanning multiple disks. It correctly discovers all parent devices and, for bootupd/GRUB, installs the bootloader to all devices with an ESP partition. For bootloaders that only support single-device configurations like systemd-boot and zipl, the implementation correctly defaults to using the first available device. The changes are well-architected, adapting data structures and logic to handle multiple devices. A new, thorough integration test validates both single and dual ESP scenarios. Overall, this is a solid enhancement with good error handling and logging. I have one suggestion to further improve the robustness of ESP detection.
| let devpath = dev.path(); | ||
| println!("Installing bootloader via bootupd to {devpath}"); | ||
| Command::new("bootupctl") | ||
| .args(["backend", "install", "--write-uuid"]) |
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I think this will lead to a kind of last-one wins behavior for bootupd.json - but in the end they should be identical I guess?
cc @HuijingHei
We probably want to document the right way to do multi-device installs there. (and have man pages in general)
Alternatively it might be nicer to explicitly support this in bootupd by just passing each device?
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I think this will lead to a kind of last-one wins behavior for
bootupd.json- but in the end they should be identical I guess?
Agree, but we need this like RAID.
Alternatively it might be nicer to explicitly support this in bootupd by just passing each device?
That will be cleaner, and we could do this only if we make bootupd not fail if the passed device does not have the esp device.
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waiting to merge until the patch release goes out |
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When the root filesystem spans multiple backing devices (e.g., LVM across multiple disks), discover all parent devices and find ESP partitions on each. For bootupd/GRUB, install the bootloader to all devices with an ESP partition, enabling boot from any disk in a multi-disk setup. systemd-boot and zipl only support single-device configurations. This adds a new integration test validating both single-ESP and dual-ESP multi-device scenarios. Fixes: bootc-dev#481 Assisted-by: Claude Code (Opus 4.5) Signed-off-by: ckyrouac <ckyrouac@redhat.com>
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When the root filesystem spans multiple backing devices (e.g., LVM across multiple disks), discover all parent devices and find ESP partitions on each. For bootupd/GRUB, install the bootloader to all devices with an ESP partition, enabling boot from any disk in a multi-disk setup. systemd-boot and zipl only support single-device configurations.
This adds a new integration test validating both single-ESP and dual-ESP multi-device scenarios.
Fixes: #481
Assisted-by: Claude Code (Opus 4.5)