From a637bdb8574168ab4cddef13d5de7f458650bda5 Mon Sep 17 00:00:00 2001 From: Gerardo Exequiel Pozzi Date: Tue, 27 Jan 2015 14:37:05 -0300 Subject: [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 --- archiso/initcpio/install/archiso | 1 + 1 file changed, 1 insertion(+) (limited to 'archiso/initcpio/install') diff --git a/archiso/initcpio/install/archiso b/archiso/initcpio/install/archiso index e506271..300dfef 100644 --- a/archiso/initcpio/install/archiso +++ b/archiso/initcpio/install/archiso @@ -4,6 +4,7 @@ build() { add_module "cdrom" add_module "loop" add_module "dm-snapshot" + add_module "overlay" add_runscript -- cgit v1.2.3-70-g09d2