Add Backblaze B2 as remote provider

[dpunkturban]

Hi,

We use pg_back to back up and restore our databases to Backblaze. Currently we are using the S3 remote provider, which does not work very well with Backblaze, because sometimes backups randomly fail due to multipart upload failures. This is not a problem with pg_back, it is a problem with Backblaze (we find other tools on the internet that have exactly the same problem, such as wal-g/wal-g#1741 (comment)).

To avoid these problems and to speed up backups to Backblaze, I implemented the Backblaze native protocol B2 for pg_back, which is insanely faster than the S3 implementation and works out of the box.

Why Backblaze?

Backblaze is one of the largest blob storage backup providers, so I think it's very useful to support them. Other backup tools such as Restic also support the B2 protocol.

Todos:

• Add Readme
• Add config to pg_back.conf
• Check naming consistency

[dpunkturban]

Hi @orgrim,

Is Backblaze B2 remote provider something you can imagine merging into the pg_back main? If yes, I would work on the open to-do points and then remove the PR draft.

Thanks :)

[orgrim]

Hi, I'm currently afk for some days, I'll review the PR as soon as I can.

Thanks for your patience

[dpunkturban]

Hi, I'm currently afk for some days, I'll review the PR as soon as I can.

Thanks for your patience

Hi @orgrim, no prob, I will refactor the code in the next few days and work on the open todos. I will remove the draft when I'm finished :)

[orgrim]

Hi, so the tests run fine, I could run the docker tests locally. The docker tests are failing because github made a change on
actions in actions/runner-images#9692

[orgrim]

Great PR, the code works as expected, I could test it with a B2 bucket.

If the region is not used by B2, the --b2-region should be dropped. The --b2-endpoint is not used in the code by it seems good to allow to configure the endpoint

[dpunkturban]

Hey @orgrim, is there anything else needed to get this merged? thx

[orgrim]

Hey @orgrim, is there anything else needed to get this merged? thx

Sorry for the delay, the PR is merged. Thanks a lot for this contribution!

[dpunkturban]

Hi @orgrim ,thanks for merging. Is it possible to create a new Release with the changes? :)

[orgrim]

Hi, yes but I need to have a look at the CI action that fails first, I hope to do that next week

[orgrim]

Hi @dpunkturban , release 2.5.0 is out!