Converting ceph-ansible or ceph-deploy clusters to cephadm
Bringing a legacy-managed cluster under cephadm: prerequisites, preparing hosts, assimilating configuration, adopting daemons, redeploying MDS and RGW, and clearing stray daemon warnings.
Migrating to Ceph
Moving clusters, data and workloads onto Ceph or onto cephadm management. Migrations from cloud and commercial object storage are covered on the alternatives pages.
Migrating from OpenStack Swift to Ceph RGW
Replacing a Swift cluster with RGW: Swift API compatibility gaps, Keystone authentication, copying containers, client endpoint changes and running both during cutover.
Importing qcow2 and raw VM disk images into Ceph RBD
Moving virtual machine disks onto Ceph with RBD import-only live migration: supported formats and streams, prepare, execute and commit steps, and running the VM while data copies.
Migrating Hadoop HDFS data to Ceph RGW with S3A
Replacing HDFS storage with RGW buckets: S3A configuration for RGW, copying data, features to disable, and jobs that depend on HDFS semantics such as atomic renames.
