WIP: Azure Blob Storage implementation

[jkroepke]

What type of PR is this?

feature

Which issue does this PR fix:

#2221

What does this PR do / Why do we need it:

Native support for Azure blob storage

If an issue # is not available please add repro steps and logs showing the issue:

Testing done on this change:

Automation added to e2e:

Will this break upgrades or downgrades?

Does this PR introduce any user-facing change?:

Native support for Azure Blob storage

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[jkroepke]

This PR is marked as WIP, since it depends on the distribution v3 packages which is not released yet.

[peusebiu]

Hello @jkroepke Isn't it possbile to reuse the s3 driver? and make it more generic. in theory it should work with all major cloud providers.

[jkroepke]

in theory it should work with all major cloud providers.

In practice, there is no S3 Compatibility API at Azure. The distribution project maintains an azure driver which I re-use here:

https://github.com/distribution/distribution/blob/main/docs/content/storage-drivers/azure.md

If upstream distribution project nativly support Azure, it should not be a major issue for zot? I thought, zot fully depends on it and the usage for storage driver is transparent.

[peusebiu]

in theory it should work with all major cloud providers.

In practice, there is no S3 Compatibility API at Azure. The distribution project maintains an azure driver which I re-use here:

https://github.com/distribution/distribution/blob/main/docs/content/storage-drivers/azure.md

If upstream distribution project nativly support Azure, it should not be a major issue for zot? I thought, zot fully depends on it and the usage for storage driver is transparent.

I see, understood, ok.

[rchincha]

Let's target this for v2.1.0

[jkroepke]

Let's target this for v2.1.0

A requirement for this PR would be github.com/docker/distribution v3.0.0-alpha.1 or higher. Thats something that should not be part of the PR here.