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Re: zfs, autofs dependencies

On Wed, Apr 01, 2015 at 02:15:32PM +0300, Mimiko wrote:
> Hello.
> I've setup a file server on Debian Wheezy x86_64. I've used 2 ssd
> for system folders which are partitioned and used in software raid
> with mdadm. It's working ok. Also there are a bunch of disks which
> are combined in a big disk raid-z2 with zfs:
> zpool create -f -m none -o ashift=12 zfspool raidz2 disk1 ....
> On this poll I've created three volumes:
> zfs create -V 4T zfspool/backup
> zfs create -V 1T zfspool/network
> zfs create -V 1T zfspool/op
> mount /dev/zvol/zfspool/backup /backup
> mount /dev/zvol/zfspool/network /backup/network
> mount /dev/zvol/zfspool/op /backup/op
> As you can see, network and op a mount into /backup folder.
> No, the problem is where to describe mount parameters so it will
> follow the order? I've used in /etc/fstab:
> /dev/zvol/zfspool/backup  /backup  ext4
> defaults,noauto,nofail,user_xattr,acl,barrier=1   0   2
> /dev/zvol/zfspool/network  /backup/network  ext4
> defaults,noauto,nofail,user_xattr,acl,barrier=1   0   2
> /dev/zvol/zfspool/op  /backup/op  ext4
> defaults,noauto,nofail,user_xattr,acl,barrier=1   0   2
> I've put noauto and nofail parameters so on boot system will not
> stop with error, because at boot zfs volumes are not ready and
> imported yet.
> Although, that I've used this in fstab, /backup/network and
> /backup/op are not mounted because they are mounted by zfs-mount in
> incorrect order, before /backup is mounted. So in
> /etc/init.d/zfs-mount script I've found do_mount() command and
> duplicated it. First time do_mount() mounts only /backup, second
> time do_mount() can mount other disks.
> The question is, is there are method better to overcome this
> problem? How to specify mount order? How to enable zfs import early?
> Second problem arises for autofs. I've setup it, so in /backup are
> some iso files. But when autofs starts it does not find /backup,
> because it is not mounted yet. So the mounted by autofs folders are
> empty. I need to restart autofs for files to appear.
> How to specify that autofs should start after zfs mounted those partition?

I suspect you will need to talk to the zfsonlinux mailing list.



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