---
- name: Ensure consistent /etc/hosts across all Pop!_OS machines
  hosts: popos
  become: true

  vars:
    hosts_entries:
      - { ip: "127.0.0.1", name: "localhost" }
      - { ip: "::1", name: "ip6-localhost" }

      # Cluster-wide consistent hostnames
      - { ip: "192.168.1.27",  name: "walnut" }
      - { ip: "192.168.1.72",  name: "acacia" }
      - { ip: "192.168.1.113", name: "ironwood" }
      - { ip: "192.168.1.132", name: "rosewood" }

      # Raspberry Pi & cluster nodes
      - { ip: "192.168.1.80",  name: "cm4a" }
      - { ip: "192.168.1.82",  name: "cm4b" }
      - { ip: "192.168.1.84",  name: "cm4c" }
      - { ip: "192.168.1.88",  name: "cm4d" }
      - { ip: "192.168.1.90",  name: "clusterpi" }
      - { ip: "192.168.1.107", name: "turingpi" }
      - { ip: "192.168.1.108", name: "pi2" }
      - { ip: "192.168.1.112", name: "pi1" }

    # Optional commented hosts
    hosts_commented:
      - { ip: "192.168.1.xxx", name: "cm4e" }
  tasks:
    - name: Deploy consistent /etc/hosts file
      template:
        src: hosts.j2
        dest: /etc/hosts
        owner: root
        group: root
        mode: '0644'