Hi,
Now, lxc-clone with overlayfs (lxc-clone -s -B overlayfs) runs internally:
mount -t overlayfs -oupperdir=${upper},lowerdir=${lower} lower dest
But, overlayfs.v22(kernel 3.15) or higher need the option "workdir=",
so lxc-clone do not work.
On 3.17 with overlayfs.v24, without workdir option:
# mount -n -t overlayfs -o lowerdir=1,upperdir=2 overlayfs 3
mount: wrong fs type, bad option, bad superblock on overlayfs,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so.
# dmesg | tail
[ 683.456473] overlayfs: missing upperdir or lowerdir or workdir
On 3.17 with overlayfs.v24, with workdir option:
# mount -n -t overlayfs -o lowerdir=1,upperdir=2,workdir=3 overlayfs 4
# cat /proc/mounts | grep overlayfs
overlayfs /root/overlayfs/4 overlayfs
rw,relatime,lowerdir=1,upperdir=2,workdir=3 0 0
See
https://git.kernel.org/cgit/linux/kernel/git/mszeredi/vfs.git/tree/Documentation/filesystems/overlayfs.txt?h=overlayfs.v24
--
KATOH Yasufumi
_______________________________________________
lxc-devel mailing list
lxc-devel@lists.linuxcontainers.org
http://lists.linuxcontainers.org/listinfo/lxc-devel
