On Wed, 2013-10-09 at 10:10 -0500, Serge Hallyn wrote: > Quoting Michael H. Warfield (m...@wittsend.com): > > On Wed, 2013-10-09 at 09:50 -0500, Serge Hallyn wrote: > > > > lxc-create -n Ubuntu-test -t ubuntu > > > > > > > > Bingo... > > > > > > > > /dev/mapper/fedora-root on /usr/lib64/lxc/rootfs type ext4 > > > > (rw,relatime,seclabel,data=ordered) > > > > > > > > Why is lxc-create even creating that mount? I don't see any reason for > > > > > > Check lxccontainer.c:785 and line 805. We call bdev_mount() in case its > > > a blockdev. In the case of a dir-backed container we still end up doing > > > a bind mount of the rootfs. > > > > > > > it. We're never running the container in lxc-create. Running > > > > "umount /usr/lib64/lxc/rootfs" clears it and we're off to the races > > > > again. > > > > > > > > If I were to venture a WAG (Wild Ass Guess) some initialization code is > > > > creating that bind mount that is not needed and that the cleanup code in > > > > lxc-create is unaware of. But I haven't gone to the trouble of trying > > > > to track the code down yet. > > > > > Now is your / still MS_SHARED? The bdev create and templates > > > run in a private namespace, but if MS_SHARED then the mounts get > > > bounced back to host. Maybe we need to manually set MS_PRIVATE every > > > time after doing an unshare() in lxc code. > > > > It doesn't seem to be... Am I looking in the right spot. I don't see > > it in the options... > > > > [root@hydra mhw]# mount | grep ' / ' > > /dev/mapper/fedora-root on / type ext4 (rw,relatime,seclabel,data=ordered)
> What does /proc/self/mountinfo on the host looks like? [root@hydra mhw]# grep ' / ' /proc/self/mounts rootfs / rootfs rw 0 0 /dev/mapper/fedora-root / ext4 rw,seclabel,relatime,data=ordered 0 0 [root@hydra mhw]# grep ' /usr/lib64/lxc/rootfs ' /proc/self/mounts /dev/mapper/fedora-root /usr/lib64/lxc/rootfs ext4 rw,seclabel,relatime,data=ordered 0 0 Regards, Mike -- Michael H. Warfield (AI4NB) | (770) 985-6132 | m...@wittsend.com /\/\|=mhw=|\/\/ | (678) 463-0932 | http://www.wittsend.com/mhw/ NIC whois: MHW9 | An optimist believes we live in the best of all PGP Key: 0x674627FF | possible worlds. A pessimist is sure of it!
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