Ansible：当变量/事实大于或等于并且小于或等于时？

Question

正如问题所暗示的，我试图评估 Ansible 角色中的一个事实，如果该值大于或等于一个数字并且小于或等于另一个数字；基本上是一个范围。我似乎无法找到如何做到这一点。

这是我的剧本片段的一部分：

- name: DEBUG Snapshots to be deleted
  debug:
    msg: The snapshot for {{ inventory_hostname.split("_")[0] }} is {{ snap_age }} day(s) old and would have been deleted.
  when: (old_snap is defined) and (old_snap == true) and (snap_age >= "1")

上面的代码实际上有效，它返回两项，一项是 80 天前的项目，一项是 102 天前的项目。

现在我想要获取年龄在 1 到 100 之间的任何快照。我尝试这样做：

- name: DEBUG Snapshots to be deleted
  debug:
    msg: The snapshot for {{ inventory_hostname.split("_")[0] }} is {{ snap_age }} day(s) old and would have been deleted.
  when: (old_snap is defined) and (old_snap == true) and (snap_age >= "1" and snap_age <= "100")

但这没有用。然后我尝试：

- name: DEBUG Snapshots to be deleted
  debug:
    msg: The snapshot for {{ inventory_hostname.split("_")[0] }} is {{ snap_age }} day(s) old and would have been deleted.
  when: (old_snap is defined) and (old_snap == true) and ((snap_age >= "1" and snap_age <= "100"))

这也不起作用，所以我想知道我在这里做错了什么。这一定是我忽略的事情。

Answer 1

这是因为您使用的不是整数而是字符串。

这个剧本不起作用：

- hosts: localhost
  connection: local
  gather_facts: no
  vars:
    old_snap: true
  tasks:
  - name: DEBUG Snapshots to be deleted
    debug:
      msg: The snapshot for {{ inventory_hostname.split("_")[0] }} is {{ item }} day(s) old and would have been deleted.
    when: (old_snap is defined) and (old_snap == true) and (item >= "1" and item <= "100")
    with_items:
    - "80"
    - "102"

但这有效：

- hosts: localhost
  connection: local
  gather_facts: no
  vars:
    old_snap: true
  tasks:
  - name: DEBUG Snapshots to be deleted
    debug:
      msg: The snapshot for {{ inventory_hostname.split("_")[0] }} is {{ item }} day(s) old and would have been deleted.
    when: (old_snap is defined) and (old_snap == true) and (item >= 1 and item <= 100)
    with_items:
    - 80
    - 102

如果您不能使用整数，您可以使用int过滤器对它们进行管道传输，例如：

- hosts: localhost
  connection: local
  gather_facts: no
  vars:
    old_snap: true
  tasks:
  - name: DEBUG Snapshots to be deleted
    debug:
      msg: The snapshot for {{ inventory_hostname.split("_")[0] }} is {{ item }} day(s) old and would have been deleted.
    when: (old_snap is defined) and (old_snap == true) and (item | int >= 1 and item | int <= 100)
    with_items:
    - "80"
    - "102"

我使用的是ansible 2.8.7，命令是ansible-playbook <your file>