diff --git a/molecule/default/molecule.yml b/molecule/default/molecule.yml
index 351718b..ac0b158 100644
--- a/molecule/default/molecule.yml
+++ b/molecule/default/molecule.yml
@@ -20,9 +20,6 @@
   - name: ctl1
     groups: &controller_groups
       - controllers
-      - cephs
-      - ceph_mons
-      - ceph_mgrs
   - name: ctl2
     groups: *controller_groups
   - name: ctl3
@@ -30,7 +27,6 @@
   - name: nvme1
     groups: &nvme_groups
       - cephs
-      - ceph_osds
   - name: nvme2
     groups: *nvme_groups
   - name: nvme3
@@ -51,11 +47,10 @@
     group_vars:
       all:
         atmosphere_image_repository: us-docker.pkg.dev/vexxhost-infra/openstack
+        ceph_mon_fsid: 441193d8-fed9-485b-87f4-09245ddc1fe7
+        ceph_mon_public_network: 10.96.240.0/24
         kubernetes_hostname: 10.96.240.10
-      controllers:
-        kubernetes_keepalived_vrid: 42
-        kubernetes_keepalived_interface: ens3
-        kubernetes_keepalived_vip: 10.96.240.10
+        # OpenStack
         openstack_helm_endpoints_region_name: RegionOne
         # Keystone
         openstack_helm_endpoints_keystone_api_host: "identity.{{ hostvars['ctl1']['ansible_host'].replace('.', '-') }}.nip.io"
@@ -87,10 +82,11 @@
         openstack_helm_endpoints_heat_cfn_api_host: "cloudformation.{{ hostvars['ctl1']['ansible_host'].replace('.', '-') }}.nip.io"
         # Horizon
         openstack_helm_endpoints_horizon_api_host: "dashboard.{{ hostvars['ctl1']['ansible_host'].replace('.', '-') }}.nip.io"
+      controllers:
+        kubernetes_keepalived_vrid: 42
+        kubernetes_keepalived_interface: ens3
+        kubernetes_keepalived_vip: 10.96.240.10
       cephs:
-        ceph_mon_fsid: 441193d8-fed9-485b-87f4-09245ddc1fe7
-        ceph_mon_public_network: 10.96.240.0/24
-      ceph_osds:
         ceph_osd_devices:
           - /dev/vdb
           - /dev/vdc
diff --git a/playbooks/ceph.yml b/playbooks/ceph.yml
index 8bc3a33..58ba618 100644
--- a/playbooks/ceph.yml
+++ b/playbooks/ceph.yml
@@ -13,25 +13,20 @@
 # under the License.
 
 - name: Setup Ceph repository
-  hosts: cephs
+  hosts: controllers:cephs
   become: true
   roles:
     - ceph_repository
 
-- name: Deploy Ceph monitors
-  hosts: ceph_mons
+- name: Deploy Ceph monitors & managers
+  hosts: controllers
   become: true
   roles:
     - ceph_mon
-
-- name: Deploy Ceph managers
-  hosts: ceph_mgrs
-  become: true
-  roles:
     - ceph_mgr
 
 - name: Deploy Ceph OSDs
-  hosts: ceph_osds
+  hosts: cephs
   become: true
   roles:
     - ceph_osd
diff --git a/releasenotes/notes/simplify-inventory-structure-07ac1eea6b173eee.yaml b/releasenotes/notes/simplify-inventory-structure-07ac1eea6b173eee.yaml
new file mode 100644
index 0000000..f580ac7
--- /dev/null
+++ b/releasenotes/notes/simplify-inventory-structure-07ac1eea6b173eee.yaml
@@ -0,0 +1,4 @@
+---
+features:
+  - Simplified the structure of the required inventory to 3 groups only which
+    are ``controllers``, ``cephs`` and ``computes``.
diff --git a/roles/ceph_csi_rbd/defaults/main.yml b/roles/ceph_csi_rbd/defaults/main.yml
index 025bca2..3dd8f08 100644
--- a/roles/ceph_csi_rbd/defaults/main.yml
+++ b/roles/ceph_csi_rbd/defaults/main.yml
@@ -20,7 +20,7 @@
 # .. envvar:: ceph_csi_rbd_mons_group [[[
 #
 # Ansible group that contains all Ceph monitors
-ceph_csi_rbd_mons_group: ceph_mons
+ceph_csi_rbd_mons_group: controllers
 
                                                                    # ]]]
 # .. envvar:: ceph_csi_rbd_id [[[
diff --git a/roles/ceph_mon/defaults/main.yml b/roles/ceph_mon/defaults/main.yml
index f001f84..86c1717 100644
--- a/roles/ceph_mon/defaults/main.yml
+++ b/roles/ceph_mon/defaults/main.yml
@@ -14,7 +14,7 @@
 # .. envvar:: ceph_mon_group [[[
 #
 # Name of Ansible group that contains all Ceph monitors
-ceph_mon_group: ceph_mons
+ceph_mon_group: controllers
 
                                                                    # ]]]
 # .. envvar:: ceph_mon_cluster_network [[[
diff --git a/roles/ceph_osd/defaults/main.yml b/roles/ceph_osd/defaults/main.yml
index 844bdee..9671346 100644
--- a/roles/ceph_osd/defaults/main.yml
+++ b/roles/ceph_osd/defaults/main.yml
@@ -14,6 +14,6 @@
 # .. envvar:: ceph_osd_mons_group [[[
 #
 # Name of Ansible group that contains all Ceph monitors
-ceph_osd_mons_group: ceph_mons
+ceph_osd_mons_group: controllers
 
                                                                    # ]]]