Bundle for ZFS drivers

[darkdragon-001]

Please add a bundle to mount and manage ZFS volumes in Clear Linux.

[ahkok]

Unlikely this will happen. Please consider using btrfs which is supported out of the box, or compile the drivers yourself.

[darkdragon-001]

Usually, I usually prefer btrfs over zfs, but this time I want to add an SSD cache to my HDD raid for speed reasons. Sadly, btrfs has no easy support for this...

[ahkok]

This seems unreasonable to keep open unless licensing concerns are addressed by the copyright owner of this code.

[redbal]

I was able to successfully compile ZFS on linux and have the resulting working binaries, but can't get the kernel module to load: modprobe: ERROR: could not insert 'zfs': Required key not available. I'm not sure what this means, but would like to get it sorted out if anyone has some ideas.

[bryteise]

@redbal This might be better talked about on the forums but I think you need to pass a special kernel commandline flag and use an lts kernel (though I didn't check which of the kernels had this patch so you might see more of them).

[bryteise]

@puneetse Do we have documentation that talks about using unsigned kernel modules?

[fenrus75]

easiest is to install the dkms bundle for the kernel in question

…

On Sat, Jun 1, 2019 at 12:42 PM William Douglas ***@***.***> wrote: @puneetse <https://github.com/puneetse> Do we have documentation that talks about using unsigned kernel modules? — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#631?email_source=notifications&email_token=AAJ54FLA52FPXDCFVNXJE3DPYLGKFA5CNFSM4HG4TPB2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGODWXHJHQ#issuecomment-497972382>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAJ54FKUS7OAIPZCG2JDLZLPYLGKFANCNFSM4HG4TPBQ> .

[puneetse]

@bryteise yes, these two documents:
https://clearlinux.org/documentation/clear-linux/guides/maintenance/kernel-modules
https://clearlinux.org/documentation/clear-linux/guides/maintenance/kernel-modules-dkms

[redbal]

@puneetse @bryteise Wow! we must be on the same wavelength...I just completed the steps in https://clearlinux.org/documentation/clear-linux/guides/maintenance/kernel-modules and was able to recompile and load the zfs modules. Now, zfs and zpool works perfectly on clearlinux. Thanks

[jimsalterjrs]

https://clearlinux.org/documentation/clear-linux/guides/maintenance/kernel-modules 404s now.

Has this document moved? I wasn't able to find it searching the site for "kernel modules".

[jimsalterjrs]

@redbal how did you resolve the uuid.h missing problem? Or did you encounter that? I found a web.archive.org snapshot of the removed kernel-modules document and got through that, but when attempting to ./configure the ZFS module, I end up with:

configure: error: in `/home/jim/zfs-0.8.3':
configure: error:
           *** uuid/uuid.h missing, libuuid-devel package required
See `config.log' for more details.

Haven't been able to figure out where the configure script is looking for uuid.h (which is present on the system itself), so I'm stuck.

[redbal]

@jim sorry, no...I've moved on to another platform.

…

On Fri, Feb 14, 2020 at 12:18 PM Jim Salter ***@***.***> wrote: @redbal <https://github.com/redbal> how did you resolve the uuid.h missing problem? Or did you encounter that? I found a web.archive.org snapshot of the removed kernel-modules document and got through that, but when attempting to ./configure the ZFS module, I end up with: configure: error: in `/home/jim/zfs-0.8.3': configure: error: *** uuid/uuid.h missing, libuuid-devel package required See `config.log' for more details. Haven't been able to figure out *where* the configure script is looking for uuid.h (which is present on the system itself), so I'm stuck. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#631?email_source=notifications&email_token=ABZPTLMWNOI6PYPND3UKZDDRC3G5RA5CNFSM4HG4TPB2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOELZYBZI#issuecomment-586383589>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABZPTLIBYTQFWEHEV7H45M3RC3G5RANCNFSM4HG4TPBQ> .

[miguelinux]

https://clearlinux.org/documentation/clear-linux/guides/maintenance/kernel-modules 404s now. Has this document moved? I wasn't able to find it searching the site for "kernel modules".

The documentation was moved to: https://docs.01.org/clearlinux/latest/guides/kernel/kernel-modules.html

[jimsalterjrs]

For anybody else going through this—the relevant bundles you need are linux-lts-dev if you're on the LTS kernel (which you'll probably need to be) or linux-dev for the native kernel, and then os-core-dev to resolve the uuid.h issue.

[jimsalterjrs]

root@clearlinux/home/jim # insmod /usr/lib/modules/4.19.103-113.lts2018/extra/zfs/zfs.ko
insmod: ERROR: could not insert module /usr/lib/modules/4.19.103-113.lts2018/extra/zfs/zfs.ko: Unknown symbol in module

I don't suppose anybody has any idea who I find out which symbol is the unknown symbol? I appreciate the help so far.

[jimsalterjrs]

^^ the answer to the above—or at least, the one I went with—is not to use insmod at all, which does not resolve dependencies, and instead use modprobe.

Trick there is, modprobe won't find the modules where the make install command left them, each in its own subdirectory under /lib/modules/<kernelversion>/extra.

I went a bit brute-force, and did:

root@clear:~# for mod in `find /lib/modules/<kernelversion>/extra -iname *.ko
do ln -s $mod /lib/modules/<kernelversion>/ 
done

After which I could just modprobe zfs.ko, and everything worked fine: although also note, the zpool and zfs commands are placed in /usr/local/sbin, and that directory is not in the default PATH.

Finally, you'll probably want ZFS to auto-load on boot:

root@clear:~# mkdir -p /etc/modules-load.d
root@clear:~# echo 'zfs' > /etc/modules-load.d/zfs.conf

After that, zfs.ko will be automatically and successfully loaded at each reboot. (But keep in mind, you're going to need to rebuild the ZFS module every time you get a new kernel version from swupd.)

[bwarden]

Trick there is, modprobe won't find the modules where the make install command left them, each in its own subdirectory under /lib/modules/<kernelversion>/extra.

depmod -a

[darkdragon-001]

I just found a tutorial in the docs using DKMS (for non-root devices).