Add Buddy CI/CD as Docker cache

[Kivlov84]

Hello guys,

We provide CI/CD for web developers: https://buddy.works. Recently, we have delivered a dedicated Docker cache for our customers, which works exactly the same as gha cache.

At the moment, we need to ask our users to set the type to gha:

docker buildx build --push -t <registry>/<image> \
  --cache-to type=gha[,parameters...] \
  --cache-from type=gha[,parameters...] .

Unfortunately, developers are convinced the cache is stored in GitHub Actions, which is misleading when investigating CI/CD issues. This proves a problem, especially in companies where multiple users are engaged in scripting DevOps processes, as they are trying to debug the problem in GHA instead of our cache.

To solve it, we'd like to add bdy as a supported type using a PR to these repositories:

https://github.com/moby/buildkit https://github.com/moby/moby

However, we'd like to know that the PR's will be accepted before we invest our time and resources in development.

Looking forward to your reply.

Alexander

[tonistiigi]

type=gha works on the protocol that Github designed for their cache service. If your implementation is different, then I think the name serves as "gha-compatible". The same situation is with S3 where there are lots of implementations that create S3-compatible API, but they all would need to use the s3 name. From the user's perspective as well it would just increase fragmentation if the same implementation is accessed by different names.

[Kivlov84]

Thank you for the reply, fair point.

Could we at least add the information about compatibility to the documentation to make it apparent to the users? I mean this spot here: https://docs.docker.com/engine/reference/commandline/buildx_build/#cache-to

Adding compatibility info to S3 would look like this:

• s3 type exports cache to an S3 bucket or S3-compatible services, such as DigitalOcean Spaces or Backblaze B2

The same goes with gha_type:

• gha type exports cache through the GitHub Actions Cache service API or gha-compatible services such as Buddy CI/CD

Also here: https://docs.docker.com/engine/reference/commandline/buildx_build/#cache-from

• s3 source can import cache from a previously exported cache with --cache-to in your S3 bucket or s3-compatible services, such as DigitalOcean Spaces or Backblaze B2
• gha source can import cache from a previously exported cache with --cache-to in your GitHub repository or gha-compatible services such as Buddy CI/CD

[dvdksn]

I can add the compatibility clarification in docs

[Kivlov84]

@dvdksn much appreciated, please do!