Error with S3 backend : No module named 'boto'

[badwulfy]

Error with S3 backend : No module named 'boto'

[sargreal]

Thanks for your bug report @kiralex !

I have never worked with S3, so i didn't realize that there were multiple versions used.

From the duplicity Readme, I can see that different versions of the boto package are required for different versions of S3. Do you know if the latest version also works with the older ones?

[badwulfy]

Thanks for your answer.

I just researched clues in the man page of duplicity and I realized there is a specific URL which use boto3 (boto3+s3://), and the legacy one whihch use boto2 (s3://). As the doc says :

S3 storage (Amazon)

s3://host[:port]/bucket_name[/prefix]
s3+http://bucket_name[/prefix]
defaults to the legacy boto backend based on boto v2 (last update 2018/07)
alternatively try the newer boto3+s3://bucket_name[/prefix]
For details see A NOTE ON AMAZON S3 and see also A NOTE ON EUROPEAN S3 BUCKETS below.

I think it would be awesome if we can have the choice. So boto in version 2 and boto3 would be installed and we could use both s3:// and boto3+s3:// URL format.

I don't know if boto3+s3:// is currently supported in volumerize

• If not, boto in version 2 should be installed (and maybe consider to support this syntax in a near/far futur, but I don't want to put any pressure on you, as s3:// suits me perfectly)
• if yes, both version 2 and 3 should be installed.

[sargreal]

Thanks for your investigation!

Yes boto3 is already installed, so i will just add the boto package.