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djgera pushed a change to branch master
in repository archiso.
from fe29d5f add documentation for cow_chunksize=
new a637bdb [archiso] Add optional OverlayFS support
new 9322a0d [archiso] Rename cowfile_size to cow_spacesize=
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commit 9322a0d3b7360f47339e98533a1bcbec321921f4
Author: Gerardo Exequiel Pozzi
Date: Tue Jan 27 14:37:05 2015 -0300
[archiso] Rename cowfile_size to cow_spacesize=
The name is more relevant since the usage is shared for both
dm-snapshot and overlayfs.
Signed-off-by: Gerardo Exequiel Pozzi
commit a637bdb8574168ab4cddef13d5de7f458650bda5
Author: Gerardo Exequiel Pozzi
Date: Tue Jan 27 14:37:05 2015 -0300
[archiso] Add optional OverlayFS support
This is the first attemp to test overlayfs in archiso.
The current dm-snapshot mode is keep and is enabled by default,
while the new mode is enabled via "-s sfs" to mkarchiso.
No new boot parameters are added, since archiso hooks detects
if the .sfs file is for dm-snapshot (airootfs.img inside)
or for overlayfs.
Persistence is supported in overlayfs mode using the same options
(cowlabel or cowdevice), but warning while in dm-snapshot mode,
only one file is used (airootfs.cow), in overlayfs mode internal
files for workdir/ and upperdir/ are allocated, so you can not use
VFAT or NTFS.
To test this, you need to enable [testing] in pacman.conf from
releng profile and edit build.sh then add "-s sfs" in make_prepare()
Look at:
setarch ${arch} mkarchiso ${verbose} -w "${work_dir}" -D "${install_dir}" prepare
Replace with:
setarch ${arch} mkarchiso ${verbose} -w "${work_dir}" -s sfs -D "${install_dir}" prepare
The build requires just half of space that the build for dm-snapshot,
since there is no ext4 img ;)
Just to remember: there is no space gain in .sfs (just about 2M)
There is at least one thing during boot with machine-id service:
Dec 24 03:31:39 archiso systemd-machine-id-commit[183]: Failed to unmount transient /etc/machine-id file in our private namespace: Invalid argument
Signed-off-by: Gerardo Exequiel Pozzi
Summary of changes:
archiso/initcpio/hooks/archiso | 28 +++++++++++++++++++++-------
archiso/initcpio/install/archiso | 1 +
archiso/mkarchiso | 34 ++++++++++++++++++++++++++++++----
docs/README.bootparams | 14 ++++++++------
4 files changed, 60 insertions(+), 17 deletions(-)
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