Gao Xiang 583133e710 erofs-differ: fix filesystem UUID for tar-converted layers ...

Derive filesystem UUIDs (`lsblk -o +UUID`) from the OCI layer digests
(although diffIDs are better in principle, but they're unavailable by
differs in advance) rather than generating a random one.  This allows
EROFS to uniquely identify each layer using the content-addressable
filesystem UUID.

It can also be used for reproducible builds. To achieve this, configure
`mkfs_options` with `-T0 --mkfs-time` (However, `--mkfs-time` requires
erofs-utils 1.8+; Otherwise, all inode timestamps will be reset w/o it):

``` toml
  [plugins."io.containerd.differ.v1.erofs"]
    mkfs_options = ["-T0 --mkfs-time"]
```

Fixes: c73c8e5d52 ("Introduce EROFS differ")
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>

2025-07-03 08:41:10 +00:00

..

plugin

Introduce EROFS differ

2025-01-13 16:16:54 +08:00

differ_linux.go

erofs-differ: fix filesystem UUID for tar-converted layers

2025-07-03 08:41:10 +00:00