Open keszybz opened 1 year ago
cmd_migrate already has code that could be tweaked for this
On Fri, Sep 15, 2023, 5:30 PM Zbigniew Jędrzejewski-Szmek < @.***> wrote:
For example, mkfs.ext4 has -d which takes a directory to use the files from, mkfs.btrfs has the equivalent under -r.
This is extremely useful because it allows file system images to be created from unprivileged userspace, without access to block devices, for example in containers. https://github.com/systemd/mkosi uses this to build images without requiring privileges.
It would be great if compression was supported. mkfs.btrfs currently does not allow compression when the file system is created in this way, which makes images painfully large.
/cc @DaanDeMeyer https://github.com/DaanDeMeyer
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Would also be amazing to add support for making specific directories in the root directory subvolumes before they are populated with files from the root directory using an option such as --subvol "DIR"
This feature would be needed in order to build disk images with systemd-repart, without requiring a loopback device. Currently since this option isn't available https://github.com/systemd/systemd/blob/main/src/partition/repart.c#L6736-L6740 is hit. But once this flag is added, it can be added to the list of FS that support this option here https://github.com/systemd/systemd/blob/main/src/shared/mkfs-util.c#L46-L48
For example,
mkfs.ext4
has-d
which takes a directory to use the files from,mkfs.btrfs
has the equivalent under-r
.This is extremely useful because it allows file system images to be created from unprivileged userspace, without access to block devices, for example in containers. https://github.com/systemd/mkosi uses this to build images without requiring privileges.
It would be great if compression was supported.
mkfs.btrfs
currently does not allow compression when the file system is created in this way, which makes images painfully large./cc @DaanDeMeyer