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Set up Ceph-Radosgw in the same model as an external S3 backend for Glance: - create an S3 user in Radosgw - create an S3 bucket for Glance - inject those parameters into Glance charm configurations as an external S3 backend - upload an image to the S3 backend via Glance, and check the size of the image in the S3 bucket directly Co-authored-by: Connor Chamberlain <connor.chamberlain@canonical.com>