OCI Image Specification——Media Types

OCI Image Media Types

OCI镜像规范定义的镜像文件相关的媒体类型如下（原文很清楚，这里就不翻译了），各媒体类型所表示的资源定义后文再详细展开：

application/vnd.oci.descriptor.v1+json: Content Descriptor
application/vnd.oci.layout.header.v1+json: OCI Layout
application/vnd.oci.image.index.v1+json: Image Index
application/vnd.oci.image.manifest.v1+json: Image manifest
application/vnd.oci.image.config.v1+json: Image config
application/vnd.oci.image.layer.v1.tar: “Layer”, as a tar archive
application/vnd.oci.image.layer.v1.tar+gzip: “Layer”, as a tar archive compressed with gzip
application/vnd.oci.image.layer.v1.tar+zstd: “Layer”, as a tar archive compressed with zstd
application/vnd.oci.empty.v1+json: Empty for unused descriptors

各媒体类型的关联如下图所示：描述符可用于所有引用，描述符说明了引用对象的媒体类型、大小和摘要值等；image index可以引用到不同平台的image manifest；一个image manifest包含一个image config和多个image layer。