Add rollback option for cluster

Add rollback option as checkbox into cluster workflow for update.

Change-Id: Ic3979fccd2bed5b44a338780213dffb2235b9ef5
Implements: blueprint add-rollback-option

magnum_ui/api/magnum.py

@@ -140,16 +140,18 @@ def cluster_template_show(request, id):
 
 
 def cluster_create(request, **kwargs):
+    kwargs.pop("rollback")
     args = _cleanup_params(CLUSTER_CREATE_ATTRS, True, **kwargs)
     return magnumclient(request).clusters.create(**args)
 
 
 def cluster_update(request, id, **kwargs):
+    rollback = kwargs.pop("rollback")
     new = _cleanup_params(CLUSTER_CREATE_ATTRS, True, **kwargs)
     old = magnumclient(request).clusters.get(id).to_dict()
     old = _cleanup_params(CLUSTER_CREATE_ATTRS, False, **old)
     patch = _create_patches(old, new)
-    return magnumclient(request).clusters.update(id, patch)
+    return magnumclient(request).clusters.update(id, patch, rollback=rollback)
 
 
 def cluster_delete(request, id):

magnum_ui/static/dashboard/container-infra/clusters/workflow/workflow.service.js

@@ -81,6 +81,10 @@
           'docker_volume_size': {
             title: gettext('Docker Volume Size (GB)'),
             type: 'number'
+          },
+          'rollback': {
+            title: gettext('Rollback cluster on update failure'),
+            type: 'boolean'
           }
         }
       };
@@ -145,6 +149,10 @@
                       placeholder: gettext('Specify the size in GB for the docker volume'),
                       description: dockerVolumeSizeDescription,
                       readonly: action === 'update'
+                    },
+                    {
+                      key: 'rollback',
+                      condition: action === 'create'
                     }
                   ]
                 }
@@ -209,6 +217,7 @@
         master_count: null,
         node_count: null,
         docker_volume_size: "",
+        rollback: false,
         discovery_url: "",
         create_timeout: null,
         keypair: ""