A blob is any kind of content that is stored by a Registry under a content-addressable identifier (a "digest").
- Layers are a good example of "blobs". + Layers are a good example of "blobs".
An image is a named set of immutable data from which a Docker container can be created.
- An image is represented by a json file called a manifest, and is conceptually a set of layers. + An image is represented by a json file called a manifest, and is conceptually a set of layers. - Image names indicate the location where they can be pulled from and pushed to, as they usually start with a registry domain name and port. + Image names indicate the location where they can be pulled from and pushed to, as they usually start with a registry domain name and port.
A layer is a tar archive bundling partial content from a filesystem.
- Layers from an image are usually extracted in order on top of each other to make up a root filesystem from which containers run out. + Layers from an image are usually extracted in order on top of each other to make up a root filesystem from which containers run out.
A registry is a service that let you store and deliver images.+
A registry is a service that let you store and deliver images.
A scope is the portion of a namespace onto which a given authorization token is granted.
A tag is conceptually a "version" of a named image.+
A tag is conceptually a "version" of a named image.
Example: `docker pull myimage:latest` instructs docker to pull the image "myimage" in version "latest".