Ivan Vilata i Balaguer (2013-06-13 16:36:49 +0200) wrote: > Serge Hallyn (2013-06-11 17:11:47 +0200) wrote: > >> The pre-start and post-stop routines run in the monitor's namespace. >> The pre-mount routine runs in the container's namespace. You might >> try moving the pre-mount stuff all into pre-start instead, and >> umounting them (-l) in the post-stop. My guess is that the aufs is >> not being umounted for one reason or another. > > I moved everything to pre-start and post-stop and the result is the > same, i.e. ``overlay.ext4`` is badly unmounted (needs journal > recovery) and the overlay loop device cannot be detached. It looks > like something doesn't get cleaned up and may be holding the overlay > file in use, but I don't know where and how to look for it. I tried > reenabling the ``umountfs`` and ``umountroot`` init scripts in the > container (Debian) just in case but nothing changed.
> For ``lxc.hook.pre-start`` and ``lxc.hook.post-stop`` version: > > #!/bin/sh > LXC_DIR=$(dirname "$LXC_ROOTFS_PATH") > > ACTION="$3" > case "$ACTION" in > (pre-start) > mount -t squashfs -o ro "$LXC_DIR/template.squashfs" > "$LXC_DIR/template" > mount -t ext4 "$LXC_DIR/overlay.ext4" "$LXC_DIR/overlay" > mount -t overlayfs -o > "lowerdir=$LXC_DIR/template,upperdir=$LXC_DIR/overlay" sliver > "$LXC_ROOTFS_PATH" \ > || mount -t aufs -o "br=$LXC_DIR/overlay:$LXC_DIR/template" sliver > "$LXC_ROOTFS_PATH" > ;; > (post-stop) > umount -l "$LXC_ROOTFS_PATH" > umount -l "$LXC_DIR/overlay" > umount -l "$LXC_DIR/template" > ;; > (*) > echo "Invalid action: $ACTION" > /dev/null > exit 1 > ;; > esac For the curiosity, I also tried to setup myself the ``rootfs`` directory running the commands from this script directly at the host before running ``lxc-start`` but the problem stays the same. Not surprising anyway since I'd bet this is mostly identical to using the pre-start and post-stop hooks. Any guru with an idea on how to find who's using the filesystem images and loop devices? fuser and lsof show nothing about them... Cheers, -- Ivan Vilata i Balaguer -- https://elvil.net/ ------------------------------------------------------------------------------ This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev _______________________________________________ Lxc-users mailing list Lxc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lxc-users