Basic Openshift deploy mostly working

roles/proxmox_sno_vm/defaults/main.yml

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+---
+# Proxmox connection
+# proxmox_api_host / proxmox_api_port are derived from the 'proxmox_api'
+# inventory host (ansible_host / ansible_port).  Do not set them here.
+proxmox_node: pve1
+proxmox_api_user: ansible@pam
+proxmox_api_token_id: ansible
+proxmox_api_token_secret: "{{ vault_proxmox_token_secret }}"
+proxmox_validate_certs: false
+
+# Storage
+proxmox_storage: local-lvm        # VM disk storage pool
+proxmox_iso_storage: local         # ISO storage pool name (Proxmox)
+proxmox_iso_dir: /var/lib/vz/template/iso  # Filesystem path on proxmox_host
+sno_credentials_dir: "/root/sno-{{ ocp_cluster_name }}"  # Persistent credentials on proxmox_host
+
+# VM specification
+sno_vm_name: "sno-{{ ocp_cluster_name }}"
+sno_cpu: 8
+sno_memory_mb: 32768
+sno_disk_gb: 120
+sno_bridge: vmbr0
+sno_vlan: 40
+sno_mac: ""  # Leave empty for auto-assignment. Set explicitly to pin MAC for static IP.
+
+# VM ID - leave 0 for auto-assign by Proxmox
+sno_vm_id: 0

roles/proxmox_sno_vm/tasks/main.yml

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+---
+# Create a Proxmox VM for Single Node OpenShift on VLAN40 (192.168.40.0/24).
+# Uses q35 machine type with UEFI (required for SNO / RHCOS).
+# An empty ide2 CD-ROM slot is created here so the boot order can reference it;
+# the deploy_openshift.yml play loads the actual ISO into it after generation.
+
+- name: Build net0 string
+  ansible.builtin.set_fact:
+    # Proxmox net format: model[=macaddr],bridge=<bridge>[,tag=<vlan>]
+    _sno_net0: >-
+      virtio{{
+        '=' + sno_mac if sno_mac | length > 0 else ''
+      }},bridge={{ sno_bridge }},tag={{ sno_vlan }}
+
+- name: Create SNO VM in Proxmox
+  community.proxmox.proxmox_kvm:
+    api_host: "{{ hostvars['proxmox_api']['ansible_host'] }}"
+    api_user: "{{ proxmox_api_user }}"
+    api_port: "{{ hostvars['proxmox_api']['ansible_port'] }}"
+    api_token_id: "{{ proxmox_api_token_id }}"
+    api_token_secret: "{{ proxmox_api_token_secret }}"
+    validate_certs: "{{ proxmox_validate_certs }}"
+    node: "{{ proxmox_node }}"
+    vmid: "{{ sno_vm_id | default(omit, true) }}"
+    name: "{{ sno_vm_name }}"
+    cores: "{{ sno_cpu }}"
+    memory: "{{ sno_memory_mb }}"
+    cpu: host
+    numa_enabled: true
+    machine: q35
+    bios: ovmf
+    efidisk0:
+      storage: "{{ proxmox_storage }}"
+      format: raw
+      efitype: 4m
+      pre_enrolled_keys: false
+    scsi:
+      scsi0: "{{ proxmox_storage }}:{{ sno_disk_gb }},format=raw,iothread=1,cache=writeback"
+    scsihw: virtio-scsi-single
+    ide:
+      ide2: none,media=cdrom
+    net:
+      net0: "{{ _sno_net0 }}"
+    boot: "order=scsi0;ide2"
+    onboot: true
+    state: present
+  register: proxmox_vm_result
+
+- name: Retrieve VM info
+  community.proxmox.proxmox_vm_info:
+    api_host: "{{ hostvars['proxmox_api']['ansible_host'] }}"
+    api_user: "{{ proxmox_api_user }}"
+    api_port: "{{ hostvars['proxmox_api']['ansible_port'] }}"
+    api_token_id: "{{ proxmox_api_token_id }}"
+    api_token_secret: "{{ proxmox_api_token_secret }}"
+    validate_certs: "{{ proxmox_validate_certs }}"
+    node: "{{ proxmox_node }}"
+    name: "{{ sno_vm_name }}"
+    type: qemu
+    config: current
+  register: proxmox_vm_info
+  retries: 5
+
+- name: Set VM ID fact for subsequent plays
+  ansible.builtin.set_fact:
+    sno_vm_id: "{{ proxmox_vm_info.proxmox_vms[0].vmid }}"
+    cacheable: true
+
+- name: Extract MAC address from VM config
+  ansible.builtin.set_fact:
+    # net0 format: virtio=52:54:00:xx:xx:xx,bridge=vmbr0,tag=40
+    sno_mac: >-
+      {{ proxmox_vm_info.proxmox_vms[0].config.net0
+         | regex_search('([0-9A-Fa-f]{2}(?::[0-9A-Fa-f]{2}){5})', '\1')
+         | first }}
+    cacheable: true
+  when: sno_mac | length == 0
+
+- name: Display VM details
+  ansible.builtin.debug:
+    msg:
+      - "VM Name : {{ sno_vm_name }}"
+      - "VM ID   : {{ sno_vm_id }}"
+      - "MAC     : {{ sno_mac }}"