Docker desktop for mac starting Docker version 4.26.0 is missing kernel modules SQUASHFS and support for
SQUASHFS_XZ Filesystem, However in the release of Docker desktop, 4.27.0 they have added the kernel module SQUASHFS, however they have still missing support for SQUASHFS_XZ Filesystem, the issue is still persisting in the latest version of Docker Desktop 4.29.0.
In Docker desktop 4.25.2, where linuxkit kernel version (6.4.16-linuxkit), they have support for it.
Ref:
root@28d045845798:/home/ubuntu# zcat /proc/config.gz | grep -i squashfs
CONFIG_SQUASHFS=y
CONFIG_SQUASHFS_FILE_CACHE=y
# CONFIG_SQUASHFS_FILE_DIRECT is not set
CONFIG_SQUASHFS_DECOMP_SINGLE=y
# CONFIG_SQUASHFS_CHOICE_DECOMP_BY_MOUNT is not set
CONFIG_SQUASHFS_COMPILE_DECOMP_SINGLE=y
# CONFIG_SQUASHFS_COMPILE_DECOMP_MULTI is not set
# CONFIG_SQUASHFS_COMPILE_DECOMP_MULTI_PERCPU is not set
CONFIG_SQUASHFS_XATTR=y
CONFIG_SQUASHFS_ZLIB=y
CONFIG_SQUASHFS_LZ4=y
CONFIG_SQUASHFS_LZO=y
CONFIG_SQUASHFS_XZ=y
CONFIG_SQUASHFS_ZSTD=y
# CONFIG_SQUASHFS_4K_DEVBLK_SIZE is not set
# CONFIG_SQUASHFS_EMBEDDED is not set
CONFIG_SQUASHFS_FRAGMENT_CACHE_SIZE=3
But in Docker desktop 4.26.0 where linuxkit kernel version 6.5.11-linuxkit, they have removed the SQUASHFS.
root@0d8c9499fb3b:/home/ubuntu# zcat /proc/config.gz | grep -i squashfs
# CONFIG_SQUASHFS is not set
In Docker desktop 4.27.0, where the linuxkit kernel version 6.6.12-linuxkit, they have re-added SQUASHFS, but they have still miss the support for XZ filesystem.
Ref:
ubuntu@fe1e2ba98d8f:~$ zcat /proc/config.gz | grep -i SQUASHFS
CONFIG_SQUASHFS=y
CONFIG_SQUASHFS_FILE_CACHE=y
# CONFIG_SQUASHFS_FILE_DIRECT is not set
CONFIG_SQUASHFS_DECOMP_SINGLE=y
# CONFIG_SQUASHFS_CHOICE_DECOMP_BY_MOUNT is not set
CONFIG_SQUASHFS_COMPILE_DECOMP_SINGLE=y
# CONFIG_SQUASHFS_COMPILE_DECOMP_MULTI is not set
# CONFIG_SQUASHFS_COMPILE_DECOMP_MULTI_PERCPU is not set
# CONFIG_SQUASHFS_XATTR is not set
CONFIG_SQUASHFS_ZLIB=y
# CONFIG_SQUASHFS_LZ4 is not set
# CONFIG_SQUASHFS_LZO is not set
# CONFIG_SQUASHFS_XZ is not set
# CONFIG_SQUASHFS_ZSTD is not set
# CONFIG_SQUASHFS_4K_DEVBLK_SIZE is not set
# CONFIG_SQUASHFS_EMBEDDED is not set
CONFIG_SQUASHFS_FRAGMENT_CACHE_SIZE=3
The same behavior is seen in the latest Docker desktop version 4.29.0 with linuxkit kernel 6.6.22-linuxkit.
Are they going to add this module in future release?