---
# =============================================================================
# proxmox_reboot.yml
# Controlled rolling reboot of Proxmox cluster nodes.
# Drains guests before rebooting, waits for rejoin, optionally restores.
#
# Use cases:
#   - Apply kernel updates that require a reboot
#   - Scheduled maintenance reboots
#   - Hardware changes requiring a restart
#
# Variables:
#   reboot_order          — ordered list of nodes to reboot (default: upgrade_order)
#   reboot_reason         — logged message explaining the reboot
#   migration_restore     — return VMs to origin after reboot (default: false)
#   drain_target_strategy — resources | explicit (default: resources)
#
# Usage:
#   # Rolling reboot all nodes
#   ansible-playbook proxmox_reboot.yml
#
#   # Reboot a single node
#   ansible-playbook proxmox_reboot.yml -e "reboot_order=[pm-node-02]"
#
#   # Reboot and restore VMs to origin
#   ansible-playbook proxmox_reboot.yml -e "migration_restore=true"
# =============================================================================

- name: "Proxmox | Controlled Rolling Reboot"
  hosts: proxmox_cluster
  gather_facts: true
  run_once: true

  vars:
    reboot_order: "{{ upgrade_order | default(groups['proxmox_cluster'] | sort) }}"
    reboot_reason: "Scheduled maintenance reboot"
    migration_restore: false
    reboot_timeout: 600
    node_rejoin_timeout: 300
    node_rejoin_retries: 30
    node_rejoin_delay: 10

  pre_tasks:
    - name: "Reboot | Log operation"
      ansible.builtin.debug:
        msg: >-
          Proxmox rolling reboot —
          client={{ client_name | default('Unknown') }}
          nodes={{ reboot_order | join(', ') }}
          reason={{ reboot_reason }}
          restore={{ migration_restore }}

  roles:
    - role: proxmox_preflight

  tasks:
    - name: "Reboot | Rolling reboot — cluster mode"
      ansible.builtin.include_tasks: tasks/proxmox_reboot_node_loop.yml
      loop: "{{ reboot_order }}"
      loop_control:
        loop_var: current_node
        label: "{{ current_node }}"
      when: proxmox_is_cluster

    - name: "Reboot | Standalone | Reboot node"
      ansible.builtin.reboot:
        reboot_timeout: "{{ reboot_timeout }}"
        msg: "{{ reboot_reason }}"
        pre_reboot_delay: 5
        post_reboot_delay: 15
      when: not proxmox_is_cluster

    - name: "Reboot | Complete"
      ansible.builtin.debug:
        msg: "✓ Rolling reboot complete for {{ client_name | default('cluster') }}."