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DevOps & Automation · Intermediate

Open Container Initiative (OCI)

A Linux Foundation project defining open standards for container image format, runtime, and distribution.

Definition

The OCI Image Spec, Runtime Spec, and Distribution Spec ensure images built by one tool run on any compliant runtime and registry. Registries now also store other OCI artifacts such as Helm charts and signatures.

Example

An image built with Buildah runs unchanged on containerd.

Exam tip

OCI compliance is why Docker-built images work after Kubernetes dropped dockershim.

Related terms