Enable Ceph for uni05epsilon adoption scenario

Add external Ceph deployment to the uni05epsilon multi-cell
adoption scenario, following the uni04delta pattern.

The Ceph cluster is deployed on the cell1 and cell2 compute
nodes (which have OSD disks) as an external cluster before
the TripleO overcloud deploy. All three stacks (overcloud,
cell1, cell2) reference the external-ceph environment and
generated credentials.

Changes:
- Add ceph_inventory.yaml targeting cell1/cell2 computes
- Add osd_spec.yaml for OSD device configuration
- Add pre_oc_run hooks to overcloud stack: setup ceph nodes,
  deploy ceph cluster, create external ceph parameters
- Add external-ceph.yaml environment to all three stacks

Related: OSPNW-1658
Co-authored-by: Cursor <cursoragent@cursor.com>

Author: rebtoor

scenarios/uni05epsilon.yaml

@@ -61,13 +61,33 @@ stacks:
       - "/usr/share/openstack-tripleo-heat-templates/environments/podman.yaml"
       - "/usr/share/openstack-tripleo-heat-templates/environments/low-memory-usage.yaml"
       - "/usr/share/openstack-tripleo-heat-templates/environments/debug.yaml"
+      - "/usr/share/openstack-tripleo-heat-templates/environments/external-ceph.yaml"
+      - "/home/zuul/external_ceph_params.yaml"
     network_data_file: "uni05epsilon/network_data.yaml.j2"
     routes: *sroutes
     vips_data_file: "uni05epsilon/vips_data_overcloud.yaml"
     roles_file: "uni05epsilon/roles.yaml"
     config_download_file: "uni05epsilon/config_download_overcloud.yaml"
     stack_nodes:
       - osp-controllers
+    pre_oc_run:
+      - name: 01 Prepare Ceph nodes
+        type: playbook
+        source: "setup_cephnodes.yaml"
+        inventory: "{{ ansible_user_dir }}/{{ zuul.projects['github.com/openstack-k8s-operators/data-plane-adoption'].
+                    src_dir }}/scenarios/uni05epsilon/ceph_inventory.yaml"
+      - name: 02 Deploy external ceph
+        type: playbook
+        source: "ceph.yml"
+        gathering: implicit
+        inventory: "{{ ansible_user_dir }}/{{ zuul.projects['github.com/openstack-k8s-operators/data-plane-adoption'].
+                    src_dir }}/scenarios/uni05epsilon/ceph_inventory.yaml"
+      - name: 03 Create external Ceph parameters file
+        type: playbook
+        source: "create_external_ceph_params.yml"
+        extra_vars:
+          ceph_node: "cell1-osp-compute-uni05epsilon-0"
+          ceph_mon_host: "172.18.0.94,172.18.0.95"
     post_oc_run:
       - name: Multi-cell post overcloud deploy
         type: playbook
@@ -93,6 +113,8 @@ stacks:
       - "/usr/share/openstack-tripleo-heat-templates/environments/low-memory-usage.yaml"
       - "/usr/share/openstack-tripleo-heat-templates/environments/debug.yaml"
       - "/usr/share/openstack-tripleo-heat-templates/environments/enable-legacy-telemetry.yaml"
+      - "/usr/share/openstack-tripleo-heat-templates/environments/external-ceph.yaml"
+      - "/home/zuul/external_ceph_params.yaml"
       - "/home/zuul/cell1-input.yaml"
     network_data_file: "uni05epsilon/network_data.yaml.j2"
     routes: *sroutes
@@ -132,6 +154,8 @@ stacks:
       - "/usr/share/openstack-tripleo-heat-templates/environments/podman.yaml"
       - "/usr/share/openstack-tripleo-heat-templates/environments/low-memory-usage.yaml"
       - "/usr/share/openstack-tripleo-heat-templates/environments/debug.yaml"
+      - "/usr/share/openstack-tripleo-heat-templates/environments/external-ceph.yaml"
+      - "/home/zuul/external_ceph_params.yaml"
       - "/home/zuul/cell2-input.yaml"
     network_data_file: "uni05epsilon/network_data.yaml.j2"
     routes: *sroutes

scenarios/uni05epsilon/ceph_inventory.yaml

@@ -0,0 +1,20 @@
+computes:
+  hosts:
+    cell1-osp-compute-uni05epsilon-0:
+      ansible_user: zuul
+      ansible_ssh_private_key_file: /home/zuul/.ssh/cifmw_reproducer_key
+      bridge_ip: 192.168.122.94/24
+      external_ip: 172.21.0.94/24
+      internalapi_ip: 172.17.0.94/24
+      storage_ip: 172.18.0.94/24
+      storagemgmt_ip: 172.20.0.94/24
+      tenant_ip: 172.19.0.94/24
+    cell2-osp-compute-uni05epsilon-0:
+      ansible_user: zuul
+      ansible_ssh_private_key_file: /home/zuul/.ssh/cifmw_reproducer_key
+      bridge_ip: 192.168.122.95/24
+      external_ip: 172.21.0.95/24
+      internalapi_ip: 172.17.0.95/24
+      storage_ip: 172.18.0.95/24
+      storagemgmt_ip: 172.20.0.95/24
+      tenant_ip: 172.19.0.95/24

scenarios/uni05epsilon/osd_spec.yaml

@@ -0,0 +1,3 @@
+---
+data_devices:
+  all: true