[Users] unsupported deleted submount

[Pavel Vokhmyanin]

Hello Ian,

It is actually a vzkernel issue.
Normally kernel appends (deleted) mark, but vzkernel prepends it.
Bind has rpm scriplets which process correctly bindmounts with "(deleted)" appended, but they do not work correctly with prepended (deleted) mark, hence the hanging deleted bindmounts on named update.

This bug has already been submitted to our development team, internal ID is #PSBM-25896, work is in progress.

Best Regards,
--
Pavel Vokhmyanin
Virtualization Maintenance
Virtuozzo

________________________________________
От: users-bounces at openvz.org <users-bounces at openvz.org> от имени Ian <openvz_list at fishnet.co.uk>
Отправлено: 17 марта 2016 г. 13:13
Кому: users at openvz.org
Тема: [Users] unsupported deleted submount

Hi,

I backup (simfs) containers nightly using vzdump (with suspend).

Early this morning one of the backups failed with the following error:


        INFO: Error: unsupported deleted submount:
(deleted)/var/named/chroot/etc/named.rfc1912.zones


I have had this problem before and know it is caused by a bind update
not deleting some chroot mounts.

df shows:

        df: ` (deleted)/var/named/chroot/etc/named.rfc1912.zones': No such file
or directory
        df: ` (deleted)/var/named/chroot/etc/named.iscdlv.key': No such file or
directory
        df: ` (deleted)/var/named/chroot/etc/named.root.key': No such file or
directory
        Filesystem Size Used Avail Use% Mounted on
        simfs 6.0G 1.3G 4.8G 22% /
        none 512M 4.0K 512M 1% /dev
        none 512M 0 512M 0% /dev/shm
        simfs 6.0G 1.3G 4.8G 22% /var/named/chroot/etc/named
        simfs 6.0G 1.3G 4.8G 22% /var/named/chroot/var/named
        simfs 6.0G 1.3G 4.8G 22% /var/named/chroot/etc/rndc.key
        simfs 6.0G 1.3G 4.8G 22% /var/named/chroot/usr/lib64/bind

This is easy to fix:

        umount /var/named/chroot/etc/named.rfc1912.zones
        umount /var/named/chroot/etc/named.iscdlv.key
        umount /var/named/chroot/etc/named.root.key


Does anyone know if this is a problem with openvz or vzdump?


Here are the log messages around the error:

        INFO: first sync finished (172 seconds)
        INFO: suspend vm
        INFO: Setting up checkpoint...
        INFO:   suspend...
        INFO: Can not suspend container: Invalid argument
        INFO: Error: unsupported deleted submount:
(deleted)/var/named/chroot/etc/named.rfc1912.zones
        INFO: Checkpointing failed
        ERROR: Backup of VM 550 failed - command 'vzctl --skiplock chkpnt 550
--suspend' failed with exit code 16

RPM Versions:

        vzdump-1.2-4.noarch
        vzctl-4.9.4-1.el6.x86_64
        vzctl-core-4.9.4-1.el6.x86_64
        vzkernel-2.6.32-042stab113.11.x86_64 (latest kernel installed but not
rebooted yet)

Thanks

Ian
--
_______________________________________________
Users mailing list
Users at openvz.org
https://lists.openvz.org/mailman/listinfo/users