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In late 2025 the company behind MinIO decided to abandon it to pursue other commercial interests. As well as upsetting a bunch of folk, it also put the cat amongst the pigeons of many software demos that relied on MinIO to emulate S3 storage locally, not to mention build pipelines that used it for validating S3 compatibility.
In this blog post I’m going to look at some alternatives to MinIO.
Presented without comment, warranty, or context - other than these might help a wandering code hacker.
boto.s3.connection.HostRequiredError: BotoClientError: When using SigV4, you must specify a 'host' parameter.
To fix, switch
conn_s3 = boto.connect_s3()
for
conn_s3 = boto.connect_s3(host='s3.amazonaws.com')
You can see a list of endpoints here.
Make sure you’re specifying the correct hostname (see above) for the bucket’s region. Determine the bucket’s region from the S3 control panel, and then use the endpoint listed here.