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1f0ced6952
Introduce openstack.cloud.volume_retype, a new module that wraps
the Cinder os-retype block storage action (POST /volumes/{id}/action)
to change the type of an existing volume.
The module supports both migration policies exposed by the Cinder API:
- 'never' – changes volume type metadata only; requires source and
target types to share the same storage backend.
- 'on-demand' – triggers a full data migration to the backend
associated with the new volume type.
The module is idempotent: if the volume already carries the requested
type no API call is made and changed=false is returned. It also
honours Ansible check mode, resolving the volume and target type to
verify feasibility without mutating any state.
A wait/timeout mechanism is included. For on-demand retypes the module
polls migration_status until 'success' or 'error'. For never retypes
it polls volume status until 'available'.
The equivalent CLI command is:
openstack volume set --type <type> --retype-policy <policy> <vol>
This closes a gap in the collection: openstack.cloud.volume handles
create/delete/update but does not expose the retype action.
Integration tests are provided covering: basic retype, idempotency,
check mode, lookup by UUID, and error handling for missing volume
and missing volume type.
Change-Id: I32b2b6303366a19baa1e3f1473b09650f6daee66
Signed-off-by: Simon Dodsley <simon@purestorage.com>