---
- name: 只读核对数据库宿主与数据挂载
  hosts: pg_hosts
  become: true
  tasks:
    - name: 限定已验证的平台
      ansible.builtin.assert:
        that:
          - ansible_facts.distribution == 'Ubuntu'
          - ansible_facts.distribution_version == '24.04'
          - ansible_facts.architecture == 'x86_64'
          - pg_instances | difference(['prod', 'dev']) | length == 0
    - name: 核对共置内存预算
      ansible.builtin.assert:
        that:
          - ansible_facts.memtotal_mb >= (2048 if 'dev' in pg_instances else 1536)
        fail_msg: PG 与 etcd 共置前需通过承载 IaC 扩容；不能以当前 512 MiB LXC 直接上线。
    - name: 核对每个数据父目录已单独挂载
      ansible.builtin.command:
        argv: [findmnt, --mountpoint, "{{ pg_data_root }}/{{ item }}", --noheadings, --output, 'TARGET,FSTYPE,SOURCE']
      loop: "{{ pg_instances }}"
      changed_when: false
      check_mode: false
    - name: 核对已有数据所有权
      ansible.builtin.include_tasks: tasks/preflight-instance.yml
      loop: "{{ pg_instances }}"
      loop_control:
        loop_var: pg_instance