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by jadeklerk 3258 days ago
runC is the tool that fits the OCI spec. It spawns containers on your host OS. runV is another tool that fits the OCI spec - it spawns container on hypervisors (type 2 AND 1).

runC is the most commonly used - it is used by containerd (which is docker's wrapper), garden (which is cloudfoundry's wrapper), and CRI-O (which is kubernete's wrapper).

rkt is another container company, whose wrapper is (afaik) just called rkt, and whose runC equivalent is systemd-nspawn, which does not meet OCI spec last time I checked.
1 comments
erickt 3258 days ago
FYI, rkt was created (and I believe still predominantly maintained) by CoreOS: https://coreos.com/rkt
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cyphar 3257 days ago
It was created by CoreOS, but was recently donated to the Cloud Native Computing Foundation[1] (the same foundation that houses Kubernetes). However, I still believe the main contributors are CoreOS at the moment.

[1]: https://www.cncf.io/projects/

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