Can't install zfs on Rocky Linux 9


I am following the procedure in RHEL-based distro — OpenZFS documentation.
All the dnf commands succeed but then modprobe fails:

#dnf config-manager --set-enabled crb
#dnf install epel-release
#dnf install -y kernel-devel
#dnf install -y zfs
#modprobe zfs
modprobe: ERROR: could not insert 'zfs': Key was rejected by service

# uname -a
Linux rocky1 5.14.0-70.22.1.el9_0.x86_64 #1 SMP PREEMPT Tue Aug 9 19:45:51 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux

Any idea?
On each new Rocky linux release installing zfs is a pain

Fixed, it was the secure boot that has to be disabled

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Good to know. Was about to reply, as I’d done it fine in Rocky 9 VM, but then I don’t have secure boot enabled. I’m guessing secure boot requires signed kernel modules for them to load and therefore without it, it won’t allow it.

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It works, if you rebuild the module. This is actually easily done, because zfs is delivered as dkms anyway:

Here’s how I do it on a secure-boot enabled Rocky9:

rpm -Uvh$(rpm --eval "%{dist}").noarch.rpm
dnf install zfs
for kv in `rpm -q --queryformat '%{evr}.%{arch}\n' kernel` ; do
    dnf install -y kernel-devel-$kv
    dkms autoinstall --kernelver $kv

Later: Forgot to mention, that you have to enroll your own signing keys first. See

The debate about switching off secure boot, and calling it a “fix”, reminds me of the debate about switching off selinux in the past.