Solution
First install EPEL release reposudo yum install epel-release
This should fix the initial install issue. However once the install is complete zfs may not work properly, you may see:
# zpool status The ZFS modules are not loaded Try running '/sbin/modprobe zfs' as root to load them
However, running modprobe results in the following
# modprobe zfs modprobe: FATAL: Module zfs not found
Looking at DKMS you will see the modules are added, but never installed and attempting to install them fails. This seems to be a bug if you don't install epel-release before installing kernel-devel.
# dkms status spl, 0.7.3: added zfs, 0.7.3: added # dkms install -m spl -v 0.7.3 Error ! echo Your kernel headers for kernel 3.10.0.693.el7.x86_64 cannot be found at /lib/modules/3.10.0-693.el7.x86_64/build or /lib/modules/3.10.0.693.el7.x86_64/source
A reboot seems to solve the spl module issue, but the zfs module still refuses to install
#reboot [truncated reboot output] ... [login] ... #dkms status spl, 0.7.3 3.10.0-693.11.1.el7.x86_64, x86_64: installed zfs, 0.7.3: added # dkms install -m zfs -v 0.7.3 [truncating error message, but there's a lot of exit code status 2, failed to clean build area, unable to remove file messages]
However, then run the zfs install again and it works... for some reason?
# dkms install -m zfs -v 0.7.3 [truncating a really long install process output] DKMS: install completed # modprobe zfs # zpool status no pools available
This doesn't make much sense, but best guess is that the install fails initially (due to the epel-release not being installed) in a not-very-elegant way. This leaves behind junk that causes the install to fail in the future. Rebooting and manually running the install clears that junk. This is all conjecture, but I hope it helps someone!
Additional troubleshooting
I've run through this a few times now, and the error doesn't seem to resolve the same way everytime. Most recent time I did it, the restart/manual install didn't work for the zfs module (spl installed after a reboot as before). I had to remove the ZFS module and re-add it.# dkms remove -m zfs -v 0.7.3 --all
[output from removal]
# dkms add -m zfs -v 0.7.3
[output from add]
# dkms install -m zfs -v 0.7.3
[and it should work now]
I"m interested to see how this goes :)
ReplyDeleteI'm thinking of building some sort of clustered HA storage for off-site backups and I see you have been at it for years. I have hardware lying around too ;)