John Drescher wrote:
I think the problem is coming from the /dev/shm tmpfs directory is
overwritten by the next udev tmpfs mount.
So the lxc code finds, in /proc/mounts, the /dev/shm mount point and tries
to unmount it, but this one is not visible yet because /dev has to be
unmounted before.
This is something to be fixed before the 0.6.5 release.
But I think the /dev/shm mount point is useless and IMO you can comment it
from your /fstab and check if the container starts.
The container did not start without /dev/shm either.
Actually I did not have /dev/shm mounted or in my /etc/fstab until
Michael Warfield suggested he had a similar problem caused when
/dev/shm was mounted so I tried to see if toggling between mounted and
not mounted caused it to work at least 1 time.
I have not had this issue with 0.6.4 or 0.6.3 in the few hours (6 to
12) I have tested each.
Do you mind to test the patch in attachment ?
---
src/lxc/conf.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
Index: lxc/src/lxc/conf.c
===================================================================
--- lxc.orig/src/lxc/conf.c
+++ lxc/src/lxc/conf.c
@@ -516,6 +516,13 @@ static int setup_rootfs_pivot_root(const
lxc_list_for_each(iterator, &mountlist) {
+ /* the mount point is not visible, very likely
+ * there is something else mounted on top of it */
+ if (access((char *)iterator->elem, F_OK)) {
+ still_mounted++;
+ continue;
+ }
+
if (!umount(iterator->elem)) {
DEBUG("umounted '%s'", (char *)iterator->elem);
lxc_list_del(iterator);
@@ -523,7 +530,8 @@ static int setup_rootfs_pivot_root(const
}
if (errno != EBUSY) {
- SYSERROR("failed to umount '%s'", (char *)iterator->elem);
+ SYSERROR("failed to umount '%s'",
+ (char *)iterator->elem);
return -1;
}
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