ansible:如何迭代所有注册结果？

Question

鉴于以下剧本:

---
- name: Check if log directory exists - Step 1
  stat: path="{{ wl_base }}/{{ item.0.name }}/{{ wl_dom }}/servers/{{ item.1 }}/logs" get_md5=no
  register: log_dir
  with_subelements:
    - wl_instances
    - servers

- name: Check if log directory exists - Step 2
  fail: msg="Log directory does not exists or it is not a symlink."
  failed_when: >
    log_dir.results[0].stat.islnk is not defined
    or log_dir.results[0].stat.islnk != true
    or log_dir.results[0].stat.lnk_source != "{{ wl_base }}/logs/{{ wl_dom }}/{{ item.1 }}"
  with_subelements:
    - wl_instances
    - servers

使用以下变量:

---
wl_instances:
  - name: aservers
    servers:
      - AdminServer
  - name: mservers
    servers:
       - "{{ ansible_hostname }}"

第二个任务目前只使用两个可能的结果之一(results[0]).

我的问题是:如何迭代存储的所有可用项log_dir.results？

示例输出debug:hostvars[inventory_hostname]如下:

    "log_dir": {
        "changed": false,
        "msg": "All items completed",
        "results": [
            {
                "changed": false,
                "invocation": {
                    "module_args": "path=\"/path/to/servers/aservers/domain/AdminServer/logs\" get_md5=no",
                    "module_name": "stat"
                },
                "item": [
                    {
                        "name": "aservers"
                    },
                    "AdminServer"
                ],
                "stat": {
                    ...
                    "lnk_source": "/path/to/logs/domain/AdminServer",
                    ...
                }
            },
            {
                "changed": false,
                "invocation": {
                    "module_args": "path=\"/path/to/servers/mservers/domain/servers/some_hostname/logs\" get_md5=no",
                    "module_name": "stat"
                },
                "item": [
                    {
                        "name": "mservers"
                    },
                    "some_hostname"
                ],
                "stat": {
                    ...
                    "lnk_source": "/path/to/logs/domain/some_hostname",
                    ...

Answer 1

循环遍历数组中的结果(由[]表示),将完成为

with_items: somelist

或者如果它是包含列表的字典,就像在这种情况下一样

with_items: log_dir.results

请注意,这也可以写

with_items: log_dir['results']

所以在你的任务中

- name: Check if log directory exists - Step 2
  fail: msg="Log directory does not exists or it is not a symlink."
  failed_when: >
    item.stat.islnk is not defined
    or item.stat.islnk != true
    or item..stat.lnk_source != "{{ wl_base }}/logs/{{ wl_dom }}/{{ item.1 }}"
  with_items: log_dir.results

有关更多信息和示例,请访问http://docs.ansible.com/playbooks_loops.html#standard-loops.

这里的主要内容是您只想访问已注册变量的一部分.