Question

我有一个简单的剧本，我试图将local_fact文件推送到远程主机，然后根据对本地事实的比较来执行任务。但是事实文件是按预期在远程主机上创建的，但不会被读取

我以为文件创建和读取之间必须有延迟，所以我等待，但要确保在读取文件之前先创建文件

`- hosts: "{{ target }}"
   vars:
     abc:  "10"
     xyz:  "11"

  tasks:

- name: write custom fact
  copy:
    dest: /etc/ansible/facts.d/somefact_b.fact
    owner: root
    group: root
    mode: 0644
    content: |
      {'some_var1': {{ abc|int }}}

- name: write custom fact
  copy:
    dest: /etc/ansible/facts.d/somefact_a.fact
    owner: root
    group: root
    mode: 0644
    content: |
     {'some_var2': {{ xyz|int }}}

- wait_for:
    path: /etc/ansible/facts.d/somefact_b.fact

- wait_for:
    path: /etc/ansible/facts.d/somefact_a.fact

- debug: var=ansible_local.somefact_a.some_var1

- debug: var=ansible_local.somefact_b.some_var2

- debug:
    msg: "Everything Looks Good"
  when: ansible_local.somefact_a.some_var1 != ansible_local.somefact_b.some_var2`

Answer 1

Q：“如果重新运行相同的剧本，则不会在第一次读取，效果很好。”

A：在同一本剧本中开始新剧本。

- hosts: "{{ target }}"
  vars:
    abc:  "10"
    xyz:  "11"
  tasks:
    - name: write custom fact
      copy:
        ...

- hosts: "{{ target }}"
  tasks:
    - debug: var=ansible_local.somefact_a.some_var1
    - debug: var=ansible_local.somefact_b.some_var2
      ...

例如下面的剧本

- hosts: test_01
  tasks:
    - copy:
        dest: /etc/ansible/facts.d/somefact_a.fact
        content: |
          {"some_var1": 10}

- hosts: test_01
  tasks:
    - debug:
        var: ansible_local.somefact_a.some_var1

给予

ok: [test_01] => {
    "ansible_local.somefact_a.some_var1": "10"
}

注释

1）需要 setup 来读取变量

$ ansible -i hosts test_01 -m setup -a "filter=ansible_local"
test_01 | SUCCESS => {
    "ansible_facts": {
        "ansible_local": {
            "somefact_a": {
                "some_var1": 10
            }
        }
    }, 
    "changed": false
}

2）如果没有 setup ，变量将不可用

$ ansible -i hosts test_01 -m debug -a "var=ansible_local"
test_01 | SUCCESS => {
    "ansible_local": "VARIABLE IS NOT DEFINED!"
}

3）使用 gather_facts: false

可以获得相同的否定结果

- hosts: test_01
  gather_facts: false
  tasks:
    - debug:
        var: ansible_local.somefact_a.some_var1

在同一本剧本中创建事实文件时，剧本无法读取local_facts

1 个答案: