I made a new COPR repository for crun so that it can be easily tested on Fedora without having to build from source. crun is a lightweight OCI container runtime written in C, intended as a faster and lower-overhead alternative to runC. The COPR repository tracks the upstream development branch, making it straightforward to try out new features and report issues before they land in a distribution package.

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

To install crun on Fedora, it is enough to:

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# dnf install 'dnf-command(copr)'
# dnf -y copr enable gscrivano/crun
# dnf install -y crun

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:

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# atomic install --system ----runtime /usr/bin/crun registry.fedoraproject.org/f27/etcd
# systemctl start etcd

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.