Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

media-types: Define layer media types suffix '+zstd' #788

Merged
merged 1 commit into from
Aug 21, 2019
Merged

media-types: Define layer media types suffix '+zstd' #788

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
8 changes: 7 additions & 1 deletion layer.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -4,13 +4,18 @@ This document describes how to serialize a filesystem and filesystem changes lik
One or more layers are applied on top of each other to create a complete filesystem.
This document will use a concrete example to illustrate how to create and consume these filesystem layers.

This section defines the `application/vnd.oci.image.layer.v1.tar`, `application/vnd.oci.image.layer.v1.tar+gzip`, `application/vnd.oci.image.layer.nondistributable.v1.tar`, and `application/vnd.oci.image.layer.nondistributable.v1.tar+gzip` [media types](media-types.md).
This section defines the `application/vnd.oci.image.layer.v1.tar`, `application/vnd.oci.image.layer.v1.tar+gzip`, `application/vnd.oci.image.layer.v1.tar+zstd`, `application/vnd.oci.image.layer.nondistributable.v1.tar`, `application/vnd.oci.image.layer.nondistributable.v1.tar+gzip`, and `application/vnd.oci.image.layer.nondistributable.v1.tar+zstd` [media types](media-types.md).

## `+gzip` Media Types

* The media type `application/vnd.oci.image.layer.v1.tar+gzip` represents an `application/vnd.oci.image.layer.v1.tar` payload which has been compressed with [gzip][rfc1952_2].
* The media type `application/vnd.oci.image.layer.nondistributable.v1.tar+gzip` represents an `application/vnd.oci.image.layer.nondistributable.v1.tar` payload which has been compressed with [gzip][rfc1952_2].

## `+zstd` Media Types

* The media type `application/vnd.oci.image.layer.v1.tar+zstd` represents an `application/vnd.oci.image.layer.v1.tar` payload which has been compressed with [zstd][rfc8478].
* The media type `application/vnd.oci.image.layer.nondistributable.v1.tar+zstd` represents an `application/vnd.oci.image.layer.nondistributable.v1.tar` payload which has been compressed with [zstd][rfc8478].

## Distributable Format

* Layer Changesets for the [media type](media-types.md) `application/vnd.oci.image.layer.v1.tar` MUST be packaged in [tar archive][tar-archive].
Expand Down Expand Up @@ -331,3 +336,4 @@ Implementations SHOULD NOT upload layers tagged with this media type; however, s
[gnu-tar-standard]: http://www.gnu.org/software/tar/manual/html_node/Standard.html
[rfc1952_2]: https://tools.ietf.org/html/rfc1952
[tar-archive]: https://en.wikipedia.org/wiki/Tar_(computing)
[rfc8478]: https://tools.ietf.org/html/rfc8478
3 changes: 3 additions & 0 deletions media-types.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -9,8 +9,10 @@ The following media types identify the formats described here and their referenc
- `application/vnd.oci.image.config.v1+json`: [Image config](config.md)
- `application/vnd.oci.image.layer.v1.tar`: ["Layer", as a tar archive](layer.md)
- `application/vnd.oci.image.layer.v1.tar+gzip`: ["Layer", as a tar archive](layer.md#gzip-media-types) compressed with [gzip][rfc1952]
- `application/vnd.oci.image.layer.v1.tar+zstd`: ["Layer", as a tar archive](layer.md#zstd-media-types) compressed with [zstd][rfc8478]
- `application/vnd.oci.image.layer.nondistributable.v1.tar`: ["Layer", as a tar archive with distribution restrictions](layer.md#non-distributable-layers)
- `application/vnd.oci.image.layer.nondistributable.v1.tar+gzip`: ["Layer", as a tar archive with distribution restrictions](layer.md#gzip-media-types) compressed with [gzip][rfc1952]
- `application/vnd.oci.image.layer.nondistributable.v1.tar+zstd`: ["Layer", as a tar archive with distribution restrictions](layer.md#zstd-media-types) compressed with [zstd][rfc8478]
giuseppe marked this conversation as resolved.
Show resolved Hide resolved

## Media Type Conflicts

Expand Down Expand Up @@ -66,3 +68,4 @@ The following figure shows how the above media types reference each other:
The image-index being a "fat manifest" references a list of image manifests per target platform. An image manifest references exactly one target configuration and possibly many layers.

[rfc1952]: https://tools.ietf.org/html/rfc1952
[rfc8478]: https://tools.ietf.org/html/rfc8478