Amazon Web Services offer Simple Storage Service (S3) that provides storage through web interfaces such as REST. Ceph extends its compatibility with S3 through the RESTful API. S3 client applications can access Ceph object storage based on access and secret keys.
S3 also requires a DNS service in place as it uses the virtual host bucket naming convention, that is,
<object_name>.<RGW_Fqdn>. For example, if you have a bucket named
jupiter, then it would be accessible over HTTP via the URL,
Perform the following steps to configure DNS on the
rgw-node1 node. If you have an existing DNS server, you can skip the DNS configuration and use your DNS server. ...