What specification does the Open Container Initiative outline for running a filesystem bundle?

What specification does the Open Container Initiative outline for running a filesystem bundle?

• A. Image Specification
• B. Distribution Specification
• C. OCI Image Specification
• D. Runtime Specification

Answer: (D)

The ability to run a filesystem bundle is defined by the OCI Runtime Specification. This spec standardizes the interface between a container runtime (like runc or crun) and the bundle it starts, describing how the runtime should launch the container from the bundle’s filesystem and configuration. It specifies what the bundle looks like (typically a rootfs directory plus a config.json) and how the runtime should interpret that configuration to start the initial process, including details about namespaces, cgroups, capabilities, and other runtime constraints. This is exactly what enables different runtimes to execute the same bundle in a consistent way across environments. In contrast, the image-related specifications focus on how container images are built, stored, and distributed. The image specification defines the layout and metadata of the image itself, while the distribution specification handles pulling and pushing images to registries. The OCI Image Specification (the formal name for that image layout) is about the image contents, not the act of running the bundle.

The ability to run a filesystem bundle is defined by the OCI Runtime Specification. This spec standardizes the interface between a container runtime (like runc or crun) and the bundle it starts, describing how the runtime should launch the container from the bundle’s filesystem and configuration. It specifies what the bundle looks like (typically a rootfs directory plus a config.json) and how the runtime should interpret that configuration to start the initial process, including details about namespaces, cgroups, capabilities, and other runtime constraints. This is exactly what enables different runtimes to execute the same bundle in a consistent way across environments.

In contrast, the image-related specifications focus on how container images are built, stored, and distributed. The image specification defines the layout and metadata of the image itself, while the distribution specification handles pulling and pushing images to registries. The OCI Image Specification (the formal name for that image layout) is about the image contents, not the act of running the bundle.