I made a new COPR repository for CRUN so that it can be easily tested on Fedora:

https://copr.fedorainfracloud.org/coprs/gscrivano/crun/

To install crun on Fedora, it is enough to:

# # # d d d n n n f f f i - i n y n s s t c t a o a l p l l r l ' e - d n y n a f b c - l r c e u o n m g m s a c n r d i ( v c a o n p o r / ) c ' r u n

a recent change in the atomic tool, which didn’t still get into a release, allows to easily override the OCI runtime for system containers. Assuming you are using atomic from the upstream repository, you can use crun as:

# # a s t y o s m t i e c m c i t n l s t s a t l a l r t - e s t y c s d t e m - r u n t i m e / u s r / b i n / c r u n r e g i s t r y . f e d o r a p r o j e c t . o r g / f 2 7 / e t c d

It will install etcd as a system container which runs through crun!

You might need to disable SELinux as the /usr/bin/crun executable is not yet labelled correctly.