diff --git a/overcloud-without-mergepy.yaml b/overcloud-without-mergepy.yaml
index f341672a2a..12467066c6 100644
--- a/overcloud-without-mergepy.yaml
+++ b/overcloud-without-mergepy.yaml
@@ -581,6 +581,13 @@ parameters:
   SwiftStorageImage:
     default: overcloud-swift-storage
     type: string
+  ObjectStorageExtraConfig:
+    default: {}
+    description: |
+      ObjectStorage specific configuration to inject into the cluster. Same
+      structure as ExtraConfig.
+    type: json
+
 
 # Ceph storage specific parameters
   CephStorageCount:
@@ -915,6 +922,8 @@ resources:
               template: {get_param: ObjectStorageHostnameFormat}
               params:
                 '%stackname%': {get_param: 'OS::stack_name'}
+          ExtraConfig: {get_param: ExtraConfig}
+          ObjectStorageExtraConfig: {get_param: ObjectStorageExtraConfig}
 
   CephStorage:
     type: OS::Heat::ResourceGroup
diff --git a/puppet/swift-storage-puppet.yaml b/puppet/swift-storage-puppet.yaml
index fb1756b8d1..05664053db 100644
--- a/puppet/swift-storage-puppet.yaml
+++ b/puppet/swift-storage-puppet.yaml
@@ -65,6 +65,18 @@ parameters:
   Hostname:
     type: string
     default: '' # Defaults to Heat created hostname
+  ExtraConfig:
+    default: {}
+    description: |
+      Additional hiera configuration to inject into the cluster. Note
+      that ObjectStorageExtraConfig takes precedence over ExtraConfig.
+    type: json
+  ObjectStorageExtraConfig:
+    default: {}
+    description: |
+      Role specific additional hiera configuration to inject into the cluster.
+    type: json
+
 
 resources:
 
@@ -126,6 +138,8 @@ resources:
         hiera:
           hierarchy:
             - heat_config_%{::deploy_config_name}
+            - object_extraconfig
+            - extraconfig
             - object
             - swift_devices_and_proxy # provided by SwiftDevicesAndProxyConfig
             - all_nodes # provided by allNodesConfig
@@ -134,6 +148,10 @@ resources:
           datafiles:
             common:
               raw_data: {get_file: hieradata/common.yaml}
+            object_extraconfig:
+              mapped_data: {get_param: ObjectStorageExtraConfig}
+            extraconfig:
+              mapped_data: {get_param: ExtraConfig}
             object:
               raw_data: {get_file: hieradata/object.yaml}
               mapped_data: # data supplied directly to this deployment configuration, etc
diff --git a/swift-storage.yaml b/swift-storage.yaml
index e4cacf3c77..1a2967faa0 100644
--- a/swift-storage.yaml
+++ b/swift-storage.yaml
@@ -39,6 +39,11 @@ parameters:
           }
         }
     type: json
+  ObjectStorageExtraConfig:
+    default: {}
+    description: |
+      Role specific additional configuration to inject into the cluster.
+    type: json
   Flavor:
     description: Flavor for Swift storage nodes to request when deploying.
     type: string