services: Introduce a cinder v3 attachments client
This change adds a new attachment client to allow for CRUD operations
against volume attachments as now exposed by the Cinder v3 API.
Change-Id: I0171dc0a87800ad33c176c6b6540fbc3db025709
diff --git a/releasenotes/notes/introduce-attachments-client-add-show-attachment-api-c3111f7e560a87b3.yaml b/releasenotes/notes/introduce-attachments-client-add-show-attachment-api-c3111f7e560a87b3.yaml
new file mode 100644
index 0000000..a058137
--- /dev/null
+++ b/releasenotes/notes/introduce-attachments-client-add-show-attachment-api-c3111f7e560a87b3.yaml
@@ -0,0 +1,8 @@
+---
+features:
+ - |
+ A new attachments client library has been introduced for the volume
+ service.
+
+ Initially only the show_attachment API is provided. This API requires a
+ minimum volume API microversion of ``3.27``.