[Update needed] duplicity 0.8.19 no longer compatible with backblaze

[AlexSat]

duplicity 0.8.19 used in volumerize 1.7.1 (https://hub.docker.com/layers/blacklabelops/volumerize/1.7.1/images/sha256-f665ed8ab11497e12dbb462b8fde6a20ea44bb26551d2ec868b8b29f030cca39?context=explore) does not support backblaze b2 for now. Also latest release 1.7.0 does not support backblaze b2 for now too. Need to update duplicity to 0.8.20 (minimum required version): https://gitlab.com/duplicity/duplicity/-/blob/8f25b8e52bf07926f32fb992656a3bb6c0dae02c/CHANGELOG.md#other-1

B2sdk 1.8.0 refactored minimum_part_size to recommended_part_size (the value used stays the same) [Adam Jacobs] It's a breaking change that makes duplicity fail with the new SDK. This fix makes duplicity compatible with both pre- and post- 1.8.0 SDKs.

Steps to reproduce:

docker run -d \ --name volumerize \ -v volumerize_cache:/volumerize-cache \ -v jenkins_volume:/source:ro \ -e "VOLUMERIZE_SOURCE=/source" \ -e "VOLUMERIZE_TARGET=b2://003945h951emn6p0000000001:H006yG2V7+pogtolEFwCexcZUWJdkNc@volumerizetest/" \ blacklabelops/volumerize

docker exec volumerize backup

Actual behaviour: Exception throws:

Could not initialize backend: No module named 'b2sdk.download_dest'

Expeted behaviour: Successfully backed up to backblaze without errors

[AlexSat]

I have been built volumerize image with duplicity 0.8.21 (current release) and its worked

[blacklabelops]

Thanks for telling.