---
# 只创建专属 dataset；PVE 新挂载需串行重启 etcd 成员，单独处理，不混入日常数据库收敛。
- name: 创建 laptop 独立生产与开发 dataset
  hosts: pg-laptop
  become: true
  gather_facts: false
  tasks:
    - name: 查询专属 ZFS dataset
      ansible.builtin.command:
        argv: [zfs, list, -H, -o, name, "data/homelab-pg-{{ item }}"]
      loop: [prod, dev]
      register: pg_datasets
      changed_when: false
      failed_when: pg_datasets.rc not in [0, 1]
      check_mode: false
    - name: 检查新 dataset 挂载路径未被占用
      ansible.builtin.stat:
        path: "{{ pg_data_root }}/{{ item.item }}"
      loop: "{{ pg_datasets.results }}"
      when: item.rc == 1
      register: pg_new_mounts
    - name: 禁止覆盖已有目录
      ansible.builtin.assert:
        that: not item.stat.exists
      loop: "{{ pg_new_mounts.results }}"
      when: not (item.skipped | default(false))
    - name: 新建本项目专用 ZFS dataset
      ansible.builtin.command:
        argv:
          - zfs
          - create
          - -o
          - "mountpoint={{ pg_data_root }}/{{ item.item }}"
          - -o
          - recordsize=16K
          - -o
          - compression=lz4
          - -o
          - atime=off
          - -o
          - "quota={{ '32G' if item.item == 'prod' else '8G' }}"
          - -o
          - org.homelab:owner=shared-postgresql
          - "data/homelab-pg-{{ item.item }}"
      loop: "{{ pg_datasets.results }}"
      when: item.rc == 1
      changed_when: true
    - name: 核对所有权与挂载路径
      ansible.builtin.command:
        argv: [zfs, get, -H, -o, value, 'org.homelab:owner,mountpoint', "data/homelab-pg-{{ item }}"]
      loop: [prod, dev]
      register: pg_dataset_owner
      changed_when: false
      failed_when: >-
        pg_dataset_owner.rc != 0 or
        pg_dataset_owner.stdout_lines != ['shared-postgresql', pg_data_root ~ '/' ~ item]
      when: not ansible_check_mode