diff --git a/cinder/api/contrib/hosts.py b/cinder/api/contrib/hosts.py
index dc1f93e75ba..ac8ba1c9aa8 100644
--- a/cinder/api/contrib/hosts.py
+++ b/cinder/api/contrib/hosts.py
@@ -17,6 +17,7 @@
 
 from oslo_config import cfg
 from oslo_log import log as logging
+from oslo_log import versionutils
 from oslo_utils import timeutils
 import webob.exc
 
@@ -89,6 +90,10 @@ class HostController(wsgi.Controller):
     def __init__(self):
         self.api = volume_api.HostAPI()
         super(HostController, self).__init__()
+        versionutils.report_deprecated_feature(
+            LOG,
+            "The Host API is deprecated and will be "
+            "be removed in a future version.")
 
     def index(self, req):
         context = req.environ['cinder.context']
diff --git a/releasenotes/notes/deprecate_hosts_api_extension-fe0c042af10a20db.yaml b/releasenotes/notes/deprecate_hosts_api_extension-fe0c042af10a20db.yaml
new file mode 100644
index 00000000000..76e75f8c52d
--- /dev/null
+++ b/releasenotes/notes/deprecate_hosts_api_extension-fe0c042af10a20db.yaml
@@ -0,0 +1,9 @@
+---
+upgrade:
+  - |
+    The hosts api extension is now deprecated and will be removed in a
+    future version.
+deprecations:
+  - |
+    The hosts api extension is now deprecated and will be removed in a
+    future version.