Connecting rokku with other ceph

[jorllilli8]

Hi I am trying to replace the ceph container of the project with a ceph of my own, i think i need to modify the environment variables like:
-ROKKU_STORAGE_S3_HOST
-ROKKU_STORAGE_S3_PORT
-ROKKU_STORAGE_S3_ADMIN_ACCESSKEY
-ROKKU_STORAGE_S3_ADMIN_SECRETKEY
with this I will be instructing my ceph to be used.
Where in the project are these variables set?
Would it be necessary to apply some more changes in the project to be able to use an external container?

On the other hand I have one problem running and testing the entire project, with the guide and the configuration set in the project github. The problem came when being all the services up I tried to execute some commands, for example "aws s3api --profile radosgw list-buckets", in which always showed the same error (NoSuchBucket), could you tell me what could be due to this error?

Thanks