cri-o/cri-o: README-based editorial guide
A guide grounded in the README, repository metadata, and license for installing and checking cri-o/cri-o.
Project scope
cri-o/cri-o describes itself in the README as "Open Container Initiative-based implementation of Kubernetes Container Runtime Interface". This article keeps to facts that can be checked in the repository. Stars, forks, and promotional badges are signals of attention, not proof of quality. Under "Compatibility matrix: CRI-O ⬄ Kubernetes", the README says: CRI-O follows the Kubernetes release cycles with respect to its minor versions (1.x.y). Patch releases (1.x.z) for Kubernetes are not in sync with those from CRI-O, because they are scheduled for each month, whereas CRI-O provides them. That establishes the project's stated boundary, not a production test.
Suitable use cases
The README's "What is the scope of this project?" section gives a useful starting point for deciding whether the project fits: Support for multiple means to download images including trust & image verification. If that problem is not yours, popularity is a poor reason to adopt it. Project names, commands, and component names are kept as written so a reader can return to the primary source without guessing at terminology. Another checkable README item is: Support multiple image formats including the existing Docker image format. It can shape a first test, but it does not replace testing in the intended environment.
How it works
The operating model is spread across sections such as "Compatibility matrix: CRI-O ⬄ Kubernetes". The source evidence includes: For more information visit the Kubernetes Version Skew Policy.. This article does not turn missing architecture, performance, or security details into claims. A real deployment still needs a look at the repository layout, configuration files, and release history.
Installation and first run
Start installation from the README's documented entry point. A command that can be checked in the source is: $ sudo curl -v --unix-socket /var/run/crio/crio.sock http://localhost/info | jq { "storage_driver": "btrfs", "storage_root": "/var/lib/containers/storage", "cgroup_driver": "systemd", "default_id_mappings": { ... } } When the README contains no runnable command, this article does not invent one. Open its "Compatibility matrix: CRI-O ⬄ Kubernetes" section and confirm system dependencies, default ports, and first-run initialization before using a public server.