Using C instead of Go avoided a bunch of the workarounds that exists in runc to workaround the Go runtime, e.g. https://github.com/opencontainers/runc/blob/main/libcontaine...
crun is Tech Preview in OpenShift 4.12: https://cloud.redhat.com/blog/whats-new-in-red-hat-openshift...
In retrospect, I could have chosen a better one.
The tests are maintained here: https://github.com/opencontainers/runtime-tools/tree/master/...
I guess this is the closest to be "certified compliant", but that is not enough for working with existing container engines as everyone just assumes runc is used
Using C instead of Go avoided a bunch of the workarounds that exists in runc to workaround the Go runtime, e.g. https://github.com/opencontainers/runc/blob/main/libcontaine...