diff --git a/contrib/st2/opensds/actions/attach_volume.py b/contrib/st2/opensds/actions/attach_volume.py
index 0ad5368..9434fdb 100644
--- a/contrib/st2/opensds/actions/attach_volume.py
+++ b/contrib/st2/opensds/actions/attach_volume.py
@@ -23,18 +23,14 @@ def run(self,
             ip_addr="",
             port="",
             tenant_id="",
-            mount_point="",
-            host_info="",
-            connection_info="",
-            access_protocol="",
+            attach_mode="",
+            host_id="",
             auth_token="",
             volume_id=""):
         data = {
-            "Mountpoint": mount_point,
-            "HostInfo": host_info,
-            "ConnectionInfo": connection_info,
+            "AttachMode": attach_mode,
+            "HostId": host_id,
             "TenantId": tenant_id,
-            "AccessProtocol": access_protocol,
             "VolumeId": volume_id}
         headers = {
             'content-type': 'application/json',
diff --git a/contrib/st2/opensds/actions/attach_volume.yaml b/contrib/st2/opensds/actions/attach_volume.yaml
index 33a595d..629e81b 100644
--- a/contrib/st2/opensds/actions/attach_volume.yaml
+++ b/contrib/st2/opensds/actions/attach_volume.yaml
@@ -16,18 +16,12 @@ parameters:
   volume_id:
     type: string
     required: true
-  mount_point:
+  attach_mode:
     type: string
     required: false
-  host_info:
-    type: object
-    required: false
-  connection_info:
-    type: object
-    required: false
-  access_protocol:
+  host_id:
     type: string
-    required: false
+    required: true
   auth_token:
     type: string
     required: false
diff --git a/contrib/st2/opensds/actions/provision_volume.yaml b/contrib/st2/opensds/actions/provision_volume.yaml
index 06d04e7..3f3514d 100644
--- a/contrib/st2/opensds/actions/provision_volume.yaml
+++ b/contrib/st2/opensds/actions/provision_volume.yaml
@@ -46,22 +46,14 @@ parameters:
     type: string
     description: "Snapshot from cloud to create volume"
     required: false
-  mount_point:
+  attach_mode:
     type: string
-    description: "Mount point to attach volume"
+    description: "Attach Mode 'ro' or 'rw' to attach volume"
     required: false
-  host_info:
-    type: object
-    description: "Host info JSON to attach volume"
-    required: false
-  connection_info:
-    type: object
-    description: "Connectin info JSON to attach volume"
-    required: false
-  access_protocol:
+  host_id:
     type: string
-    description: "Access protocol for attach volume"
-    required: false
+    description: "Host id to attach volume"
+    required: true
   auth_token:
     type: string
     description: "Authentication Token"
diff --git a/contrib/st2/opensds/actions/workflows/provision_volume.yaml b/contrib/st2/opensds/actions/workflows/provision_volume.yaml
index 7fa5a22..527ffcb 100644
--- a/contrib/st2/opensds/actions/workflows/provision_volume.yaml
+++ b/contrib/st2/opensds/actions/workflows/provision_volume.yaml
@@ -16,10 +16,8 @@ workflows:
             - profile_id
             - snapshot_id
             - snapshot_from_cloud
-            - mount_point
-            - host_info
-            - connection_info
-            - access_protocol
+            - attach_mode
+            - host_id
             - auth_token
             - timeout
         output:
@@ -53,10 +51,8 @@ workflows:
                     port: "<% $.port %>"
                     tenant_id: "<% $.tenant_id %>"
                     volume_id: <% $.volume_id %>
-                    mount_point: <% $.mount_point %>
-                    host_info: <% $.host_info %>
-                    connection_info: <% $.connection_info %>
-                    access_protocol: <% $.access_protocol %>
+                    attach_mode: <% $.attach_mode %>
+                    host_id: <% $.host_id %>
                     auth_token: "<% $.auth_token %>"
                 publish:
                     print_status : <% task(attach_volume).result.stdout %>
diff --git a/docs/INSTALL.md b/docs/INSTALL.md
index 1b2516e..edddc75 100644
--- a/docs/INSTALL.md
+++ b/docs/INSTALL.md
@@ -108,7 +108,7 @@ For the examples below OpenSDS is installed on VM and both StackStorm and Orches
         https://localhost/api/v1/executions \
         -H  'content-type: application/json' \
         -H  'X-Auth-Token: <stackstorm token>' \
-        -d '{"action": "opensds.provision-volume", "user": null, "parameters": {"i_paddr": "<ip>", "port": "50040", "size": 1, "tenant_id": "<id>", "name": "test000", "auth_token": "<opensds token>", "host_info": {"host":"ubuntu","initiator":"iqn.1993-08.org.debian:01:437bac3717c8","ip":"<host ip>"}}}'
+        -d '{"action": "opensds.provision-volume", "user": null, "parameters": {"i_paddr": "<ip>", "port": "50040", "size": 1, "tenant_id": "<id>", "name": "test000", "auth_token": "<opensds token>", "host_id": "<host_id>"}}'
     ```
 
 * Create Volume using StackStorm Action with input arguments