[HOWTO] Instal ZFS-Plugin & use ZFS on OMV

Hello,
I ran into a problem. When trying to install zfs plugin cannot generate plugin openmediavault index. In the window there is only the error message and a close button. When this menu appears on the left section of zfs, but when logging in it throws error.

Ошибка #0:
exception 'OMV\ExecException' with message 'Failed to execute command 'export PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin; export LANG=C; zfs list -H -t all -o name,type 2>&1' with exit code '1': The ZFS modules are not loaded.
Try running '/sbin/modprobe zfs' as root to load them.' in /usr/share/php/openmediavault/system/process.inc:175
Stack trace:
#0 /usr/share/omvzfs/Utils.php(377): OMV\System\Process->execute(Array, 1)
#1 /usr/share/omvzfs/Utils.php(219): OMVModuleZFSUtil::exec('zfs list -H -t ...', Array, 1)
#2 /usr/share/openmediavault/engined/rpc/zfs.inc(191): OMVModuleZFSUtil::getZFSFlatArray()
#3 [internal function]: OMVRpcServiceZFS->getObjectTree(Array, Array)
#4 /usr/share/php/openmediavault/rpc/serviceabstract.inc(124): call_user_func_array(Array, Array)
#5 /usr/share/php/openmediavault/rpc/rpc.inc(84): OMV\Rpc\ServiceAbstract->callMethod('getObjectTree', Array, Array)
#6 /usr/sbin/omv-engined(516): OMV\Rpc\Rpc::call('ZFS', 'getObjectTree', Array, Array, 1)
#7 {main}
О

Update. https://github.com/zfsonlinux/zfs/issues/1155
I used the article https://github.com/zfsonlinux/zfs/issues/1155 and collected manually zfs and spl(actual version 0.6.5.8). They demanded a new version of linux-headers,

Error! Your kernel headers for kernel 3.16.0-4-amd64 cannot be found.
Please install the linux-headers-3.16.0-4-amd64 package,

after installation gathered correctly and zfs earned. In OMV notification about the available version did not.

I have received the following error while trying to delete a pool:

Error #0:
exception 'OMVModuleZFSException' in /usr/share/omvzfs/Utils.php:540
Stack trace:
#0 /usr/share/omvzfs/Utils.php(196): OMVModuleZFSUtil::exec('ls -la /dev/dis...', Array, 2)
#1 /usr/share/omvzfs/Utils.php(160): OMVModuleZFSUtil::getDevByID('luks-ESXi-SSD-1')
#2 /usr/share/openmediavault/engined/rpc/zfs.inc(326): OMVModuleZFSUtil::getDevDisksByPool('ssd-mirror')
#3 [internal function]: OMVRpcServiceZFS->deleteObject(Array, Array)
#4 /usr/share/php/openmediavault/rpcservice.inc(125): call_user_func_array(Array, Array)
#5 /usr/share/php/openmediavault/rpc.inc(79): OMVRpcServiceAbstract->callMethod('deleteObject', Array, Array)
#6 /usr/sbin/omv-engined(500): OMVRpc::exec('ZFS', 'deleteObject', Array, Array, 1)
#7 {main}

Now I have manually deleted the pool using zpool destroy, but I cannot create a new pool using the GUI. The only solution was to reformat the drives, probably because this generates new UUIDs.

Currently `I` don't manage omv-zfs code for OMV 2.x, Sorry
`Maybe`, devs who wrote 2.x code help your issues but I doubt

after zpool creation with some datasets

found strange disk usage reporting in the Performance statistics--> Disk usage, while filling the pool/datasets

root@zfsnas:/zfs1# df -h
Dateisystem Größe Benutzt Verf. Verw% Eingehängt auf
zfs1 6,2T 852G 5,4T 14% /zfs1
zfs1/backup 5,8T 445G 5,4T 8% /zfs1/backup
zfs1/users 6,1T 754G 5,4T 13% /zfs1/users
zfs1/media 5,8T 375G 5,4T 7% /zfs1/media
zfs1/public 7,9T 2,6T 5,4T 32% /zfs1/public

It looks performance statistics reporting does not sum up the used space by all datasets. zfs pool should still be 10TB.
Any idea what went wrong ?

You are conflating Free Space with Pool Size. These are not the same things. If you have a 10TB pool with four datasets, and you put 1TB of data in each dataset, the pool's base (in your case, zfs1) is going to show 6TB remaining.

Look at it this way. When you created your zfs1 pool, then added 4 datasets to it, before you added any data to any of those, if you looked at it you would've seen 5 filesystems at 10TB each, but you didn't really have 50TB of space, you had 10TB. Same thing. If you look at your first screenshot and do some math, you'll see that the Size column is the sum of the Used and Available columns for all datasets.

There's no easy way to track it in here, because the pool size will never equal used space + free space, due to metadata. Ignore the size column and you'll get closer. Try, instead of 'df -h' doing 'zfs list'. You'll notice that doesn't even show you a Size column, because ZFS already knows it's meaningless.

As someone with the following criteria:
1. On OMV 2
2. Still using the old ZFS plugin (haven't updated in awhile)
3. Looking to upgrade to OMV 3

I just want to make sure that I understand correctly, I need to:
1. Uninstall ZFS plugin/de-select from repos
2. Run this command:

apt-get autoremove debian-zfs libnvpair1 libuutil1 libzfs2 libzpool2 zfsutils spl-dkms zfs-dkms openmediavault-zfs

3. Upgrade OMV
4. Re-enable the ZFS repos (use Testing to get the Debian repos)
5. Install the plugin
6. Import the pool

Does this sound right? Thanks!

Hello,

a stupid question: work this with kernel 4.8?? I have some errors (dkms modul). Is this my mistake?

THX

Zitat von subzero79

I would upgrade an current installation. Clean install is preferred.

OK, so suppose I just wanted to update the ZFS repository, properly, and staying on 2.0 in the meantime. Would I simply uninstall and reinstall the plugin without any terminal commands?

Sent from my Nexus 6P using Tapatalk

Zitat von ryecoaaron

What needs to be updated? Properly would be me updating omv-extras to reflect the change.

OK, I realize that my use of words wasn't the best. I'm trying to rid myself of this text and get the latest packages for zfs

Sent from my Nexus 6P using Tapatalk

I believe this was just a move to https instead of http.

SOLVED. It was a problem from try kernel 4.8

I have the follow Problem:

When i use "add object" on my pool named "openmediavault" there is a error

Fehler #0:
exception 'OMV\ExecException' with message 'Failed to execute command 'export PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin; export LANG=C; mount -v '/openmediavault' 2>&1' with exit code '1': mount: can't find /openmediavault in /etc/fstab' in /usr/share/php/openmediavault/system/process.inc:175
Stack trace:
#0 /usr/share/php/openmediavault/system/mountpoint.inc(135): OMV\System\Process->execute()
#1 /usr/share/openmediavault/engined/module/fstab.inc(71): OMV\System\MountPoint->mount()
#2 /usr/share/openmediavault/engined/rpc/config.inc(189): OMVModuleFsTab->startService()
#3 [internal function]: OMVRpcServiceConfig->applyChanges(Array, Array)
#4 /usr/share/php/openmediavault/rpc/serviceabstract.inc(124): call_user_func_array(Array, Array)
#5 /usr/share/php/openmediavault/rpc/serviceabstract.inc(150): OMV\Rpc\ServiceAbstract->callMethod('applyChanges', Array, Array)
#6 /usr/share/php/openmediavault/rpc/serviceabstract.inc(528): OMV\Rpc\ServiceAbstract->OMV\Rpc\{closure}('/tmp/bgstatusjK...', '/tmp/bgoutputzG...')
#7 /usr/share/php/openmediavault/rpc/serviceabstract.inc(151): OMV\Rpc\ServiceAbstract->execBgProc(Object(Closure))
#8 /usr/share/openmediavault/engined/rpc/config.inc(208): OMV\Rpc\ServiceAbstract->callMethodBg('applyChanges', Array, Array)
#9 [internal function]: OMVRpcServiceConfig->applyChangesBg(Array, Array)
#10 /usr/share/php/openmediavault/rpc/serviceabstract.inc(124): call_user_func_array(Array, Array)
#11 /usr/share/php/openmediavault/rpc/rpc.inc(84): OMV\Rpc\ServiceAbstract->callMethod('applyChangesBg', Array, Array)
#12 /usr/sbin/omv-engined(516): OMV\Rpc\Rpc::call('Config', 'applyChangesBg', Array, Array, 1)
#13 {main}

I generate a filesystem named plexmediaserver. The filesystem is generated but on openmediavault gui i have the yellow message "Configuration changed..... This messeage will not go away. The same when i create the filesystem with

zfs create openmediavault/plexmediaserver

Versions:
openmediavault: 3.058
openmediavault-zfs: 3.05

@polarstern

1. rm /var/lib/openmediavault/dirtymodules.json
2. ZFS->Settings
Disable `Enable Automatic Sharing of Nested Properties`
(currently it seems `Enable Automatic Sharing of Nested Properties` doesn't work as expected so disable it)

try above procedures

Zitat von wolffstarr

I believe this was just a move to https instead of http.

Zitat von subzero79

Based on some comments and what I see in the github page support for wheezy has been dropped apparently. I cant still find any official mention or announce about this.

@subzero79, how would I go about making this change to test wolffstarr's theory?