diff --git a/ci/environments/scenario012-multinode-containers.yaml b/ci/environments/scenario012-multinode-containers.yaml
index ec7c8ecc90..4b646988a7 100644
--- a/ci/environments/scenario012-multinode-containers.yaml
+++ b/ci/environments/scenario012-multinode-containers.yaml
@@ -77,6 +77,7 @@ parameter_defaults:
   NeutronTypeDrivers: local,vxlan,vlan,flat
   IronicDefaultNetworkInterface: neutron
   IronicAutomatedClean: false
+  IronicApiMaxRetries: 180
   NeutronFlatNetworks: datacentre
   NeutronNetworkVLANRanges: 'datacentre:500:599,tenant:300:399'
   ML2HostConfigs: { "net-ans-br": { "ansible_network_os": "openvswitch", "ansible_host": "127.0.0.1", "ansible_user": "root", "ansible_ssh_private_key_file": "/etc/puppet/ci-key"}}
diff --git a/ci/environments/scenario012-standalone.yaml b/ci/environments/scenario012-standalone.yaml
index 8b457f0abb..95be38854b 100644
--- a/ci/environments/scenario012-standalone.yaml
+++ b/ci/environments/scenario012-standalone.yaml
@@ -34,6 +34,7 @@ parameter_defaults:
   NeutronMechanismDrivers: ovn,ansible
   NeutronNetworkType: vlan
   NeutronTypeDrivers: local,geneve,vlan,flat
+  IronicApiMaxRetries: 180
   IronicDefaultNetworkInterface: neutron
   IronicAutomatedClean: false
   NeutronFlatNetworks: datacentre
diff --git a/deployment/nova/nova-ironic-container-puppet.yaml b/deployment/nova/nova-ironic-container-puppet.yaml
index 4989b80ddc..d9a2397532 100644
--- a/deployment/nova/nova-ironic-container-puppet.yaml
+++ b/deployment/nova/nova-ironic-container-puppet.yaml
@@ -50,6 +50,10 @@ parameters:
     type: boolean
     tags:
       - role_specific
+  IronicApiMaxRetries:
+    description: The number of times to retry when a request conflicts. If set to 0, only try once, no retries.
+    type: number
+    default: -1
 
 conditions:
 
@@ -59,6 +63,8 @@ conditions:
         - equals: [{get_param: NovaNfsEnabled}, true]
         - equals: [{get_param: [RoleParameters, NovaNfsEnabled]}, '']
       - equals: [{get_param: [RoleParameters, NovaNfsEnabled]}, true]
+  ironic_api_max_retry_cond:
+    equals: [{get_param: IronicApiMaxRetries}, -1]
 
 resources:
 
@@ -104,6 +110,11 @@ outputs:
             nova::ironic::common::auth_url: {get_param: [EndpointMap, KeystoneInternal, uri_no_suffix]}
             nova::ironic::common::username: 'ironic'
             nova::ironic::common::api_endpoint: {get_param: [EndpointMap, IronicInternal, uri]}
+          - if:
+            - ironic_api_max_retry_cond
+            - {}
+            - nova::ironic::common::api_max_retries:
+                get_param: IronicApiMaxRetries
       puppet_config:
         config_volume: nova
         puppet_tags: nova_config,nova_paste_api_ini
diff --git a/environments/services/neutron-ml2-ansible.yaml b/environments/services/neutron-ml2-ansible.yaml
index e40f047893..109ad7b72c 100644
--- a/environments/services/neutron-ml2-ansible.yaml
+++ b/environments/services/neutron-ml2-ansible.yaml
@@ -2,6 +2,7 @@
 resource_registry:
   OS::TripleO::Services::NeutronCorePlugin: OS::TripleO::Services::NeutronCorePluginML2Ansible
 parameter_defaults:
+  IronicApiMaxRetries: 180
   IronicDefaultNetworkInterface: neutron
   NeutronMechanismDrivers: openvswitch,ansible
   NeutronTypeDrivers: local,vxlan,vlan,flat