diff --git a/go.mod b/go.mod
index 03888a82b..e18868932 100644
--- a/go.mod
+++ b/go.mod
@@ -12,6 +12,7 @@ require (
 	github.com/onsi/ginkgo/v2 v2.26.0
 	github.com/onsi/gomega v1.38.2
 	github.com/openshift/api v3.9.0+incompatible
+	github.com/openshift/client-go v0.0.0-20240528061634-b054aa794d87
 	github.com/openstack-k8s-operators/barbican-operator/api v0.6.1-0.20251004061941-fc4a6b62f14f
 	github.com/openstack-k8s-operators/cinder-operator/api v0.6.1-0.20251002160033-d2a363bddc32
 	github.com/openstack-k8s-operators/designate-operator/api v0.6.1-0.20251002063410-b6cf1b1e0e23
diff --git a/go.sum b/go.sum
index 6a70b2e22..2fc6faec9 100644
--- a/go.sum
+++ b/go.sum
@@ -118,6 +118,8 @@ github.com/onsi/gomega v1.38.2 h1:eZCjf2xjZAqe+LeWvKb5weQ+NcPwX84kqJ0cZNxok2A=
 github.com/onsi/gomega v1.38.2/go.mod h1:W2MJcYxRGV63b418Ai34Ud0hEdTVXq9NW9+Sx6uXf3k=
 github.com/openshift/api v0.0.0-20250711200046-c86d80652a9e h1:E1OdwSpqWuDPCedyUt0GEdoAE+r5TXy7YS21yNEo+2U=
 github.com/openshift/api v0.0.0-20250711200046-c86d80652a9e/go.mod h1:Shkl4HanLwDiiBzakv+con/aMGnVE2MAGvoKp5oyYUo=
+github.com/openshift/client-go v0.0.0-20240528061634-b054aa794d87 h1:JtLhaGpSEconE+1IKmIgCOof/Len5ceG6H1pk43yv5U=
+github.com/openshift/client-go v0.0.0-20240528061634-b054aa794d87/go.mod h1:3IPD4U0qyovZS4EFady2kqY32m8lGcbs/Wx+yprg9z8=
 github.com/openstack-k8s-operators/barbican-operator/api v0.6.1-0.20251004061941-fc4a6b62f14f h1:x+5NGi9zVckLt4bWi1mv7sABcHjInev3BgTOhBMcOCg=
 github.com/openstack-k8s-operators/barbican-operator/api v0.6.1-0.20251004061941-fc4a6b62f14f/go.mod h1:8ANa5p+Iv4lhYVTOVzRYF7usutis46e3v70ljCAmKQI=
 github.com/openstack-k8s-operators/cinder-operator/api v0.6.1-0.20251002160033-d2a363bddc32 h1:COOGq+Dq2SXj5LD8W00iyE2lmn3bFt2b+wjJyTmS94I=
diff --git a/pkg/dataplane/inventory.go b/pkg/dataplane/inventory.go
index fd2f14442..bc9bb1416 100644
--- a/pkg/dataplane/inventory.go
+++ b/pkg/dataplane/inventory.go
@@ -136,6 +136,13 @@ func GenerateNodeSetInventory(ctx context.Context, helper *helper.Helper,
 	// add the NodeSet name variable
 	nodeSetGroup.Vars["edpm_nodeset_name"] = instance.Name
 
+	// add ID of the RHOSO cluster to the ansible variables
+	nodeSetGroup.Vars["edpm_rhoso_cluster_id"], err = util.GetRhosoClusterID(ctx, instance.Namespace)
+	if err != nil {
+		utils.LogErrorForObject(helper, err, "could not get OpenShift Cluster ID", instance)
+		return "", err
+	}
+
 	isDisconnected, err := util.IsDisconnectedOCP(ctx, helper)
 	if err != nil {
 		return "", err
diff --git a/pkg/dataplane/util/cluster.go b/pkg/dataplane/util/cluster.go
new file mode 100644
index 000000000..8e48b7415
--- /dev/null
+++ b/pkg/dataplane/util/cluster.go
@@ -0,0 +1,40 @@
+/*
+Copyright 2025.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package util //nolint:revive // util is an acceptable package name in this context
+
+import (
+	"context"
+	"fmt"
+
+	configv1client "github.com/openshift/client-go/config/clientset/versioned/typed/config/v1"
+
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	ctrl "sigs.k8s.io/controller-runtime"
+)
+
+// GetRhosoClusterID - retrieves the RHOSO cluster ID
+func GetRhosoClusterID(ctx context.Context, namespace string) (string, error) {
+	configClient, err := configv1client.NewForConfig(ctrl.GetConfigOrDie())
+	if err != nil {
+		return "", err
+	}
+	clusterVersion, err := configClient.ClusterVersions().Get(ctx, "version", metav1.GetOptions{})
+	if err != nil {
+		return "", err
+	}
+	return fmt.Sprintf("%s:%s", clusterVersion.Spec.ClusterID, namespace), nil
+}
diff --git a/tests/functional/dataplane/openstackdataplanenodeset_controller_test.go b/tests/functional/dataplane/openstackdataplanenodeset_controller_test.go
index 22ca5b8a6..d1024e897 100644
--- a/tests/functional/dataplane/openstackdataplanenodeset_controller_test.go
+++ b/tests/functional/dataplane/openstackdataplanenodeset_controller_test.go
@@ -285,6 +285,24 @@ var _ = Describe("Dataplane NodeSet Test", func() {
 		})
 	})
 
+	When("A Dataplane nodeset is created", func() {
+		BeforeEach(func() {
+			DeferCleanup(th.DeleteInstance, CreateNetConfig(dataplaneNetConfigName, DefaultNetConfigSpec()))
+			DeferCleanup(th.DeleteInstance, CreateDNSMasq(dnsMasqName, DefaultDNSMasqSpec()))
+			DeferCleanup(th.DeleteInstance, CreateDataplaneNodeSet(dataplaneNodeSetName, DefaultDataPlaneNoNodeSetSpec(false)))
+			CreateSSHSecret(dataplaneSSHSecretName)
+			CreateCABundleSecret(caBundleSecretName)
+			SimulateDNSMasqComplete(dnsMasqName)
+			SimulateIPSetComplete(dataplaneNodeName)
+			SimulateDNSDataComplete(dataplaneNodeSetName)
+		})
+		It("should have the RHOSO cluster ID set in the Ansible inventory", func() {
+			secret := th.GetSecret(dataplaneSecretName)
+			Expect(secret.Data["inventory"]).Should(
+				ContainSubstring("edpm_rhoso_cluster_id"))
+		})
+	})
+
 	When("TLS is enabled", func() {
 		tlsEnabled := true
 		When("A Dataplane resource is created with PreProvisioned nodes, no deployment", func() {