ZFS (0.6.3) auto mount on startup in Debian

[ksb4ever]

Hi!
When in /etc/default/zfs ZFS_MOUNT is set to 'yes', no pools are available (and not mounted on startup, of course).

# zfs list
no datasets available
# zpool list
no pools available
# zpool status
no pools available

It is possible to mount zfs pool only after zpool import id/name.
If ZFS_MOUNT is set to 'no', zpools are available to mount.

[FransUrbo]

I don't understand what you're saying...

Are you saying that setting ZFS_MOUNT=yes does NOT import and mount the filesystems and that setting it to 'no' DOES imports it!?

FYI, that setting have nothing to do with the actual import, just the following mount.

[ksb4ever]

Ok, lets say I have pool mounted.
a) When I set ZFS_MOUNT to yes and reboot the system, pool is not mounted and even it's lost from pools list (look at my 1st post), so I need to import it again.
b) When ZFS_MOUNT stays no, after reboot pool is already mountable (no need to import).

[FransUrbo]

Do you use root on ZFS?

I simply can't see any possibility for what you suggests in the code:

                case "$ZFS_MOUNT" in
                        ([Oo][Ff][Ff]|[Nn][Oo]|'')
                                exit 3
                                ;;
                esac

If (when) it's 'no', it cancels, and if it's not (i.e., 'yes'), it continues...

I have no idea how to debug or to help you here... You might want to take this to the list, maybe someone there could help...

[l1k]

Likely fixed by #2766 if Dracut is used.

[yarikoptic]

might (since detail is insufficient) be related to #2979 if import by id fails?

[yarikoptic]

ok -- I have upgraded to dailies (0.6.3-222d9d57jessie) and none of the partitions, nor pool itself got automatically mounted upon reboot. pool got imported though, and zfs mount -a works just fine to mount all the partitions. so it seems just that ZFS_MOUNT=yes is ignored. Also got a bit confused with a new option ZFS_INITRD_ADDITIONAL_DATASETS -- I took it as which partitions to mount in addition, i.e. not replacing the meanning of ZFS_MOUNT, right?

[FransUrbo]

ok -- I have upgraded to dailies (0.6.3-222d9d57jessie) and none of the partitions, nor pool itself got automatically mounted upon reboot.

Any information or message to indicate why (not)?

Try removing any 'quiet' option on the kernel command line. Also, there's a 'zfsdebug=1' you could try.

Both those are only relevant if you boot of ZFS though.

pool got imported though,

'nor pool itself got automatically mounted'… So which is it, is it imported or not? A pool can't be mounted, only imported…

Are you running root on ZFS? Is the scripts /etc/init.d/zfs-{mount,share} run at boot?

Try:

find /etc/rc?.d -name '*zfs-*'

and past the output of it here.

Also got a bit confused with a new option ZFS_INITRD_ADDITIONAL_DATASETS -- I took it as which partitions to mount in addition, i.e. not replacing the meanning of ZFS_MOUNT, right?

'in addition to the root filesystem' yes - as in: used for filesystems such as /usr, /usr/local, /var etc, etc, where / is on ZFS. Otherwise, it isn't used.=

[yarikoptic]

those debug msgs -- they would be concerned with kernel not rc* bootup verbosity (which is of interest here to investigate init scripts behavior), or am I wrong?

# find /etc/rc?.d -name '*zfs-*'
/etc/rc0.d/K09zfs-mount
/etc/rc0.d/K01zfs-share
/etc/rc1.d/K09zfs-mount
/etc/rc1.d/K01zfs-share
/etc/rc2.d/S02zfs-share
/etc/rc2.d/S01zfs-mount
/etc/rc3.d/S02zfs-share
/etc/rc3.d/S01zfs-mount
/etc/rc4.d/S02zfs-share
/etc/rc4.d/S01zfs-mount
/etc/rc5.d/S02zfs-share
/etc/rc5.d/S01zfs-mount
/etc/rc6.d/K09zfs-mount
/etc/rc6.d/K01zfs-share

as for mounted-vs-imported -- it can be online (thus imported) but not mounted, and that is how it was upon reboot (I will reboot whenever I get a chance to get a clear(er) picture). But I could similarly unmount the entire pool while still keeping it online (i.e. imported):

# zpool status | grep state
 state: ONLINE
# mount | grep 'tank '
tank on /tank type zfs (rw,relatime,xattr,noacl)
# umount /tank
# mount | grep 'tank '
# zpool status | grep state
 state: ONLINE

or I am misunderstanding something?

[yarikoptic]

confirmed on reboot -- pool is imported (marked ONLINE) while nothing is mounted. issuing zfs mount -a mounted all partitions including the pool itself (/tank)

[behlendorf]

Closing as out of date due to the overhaul of the init scripts. Please open a new issue if this remains a problem.