来自站点 yaml 或模板的 Ansible 剧本循环？

Question

我正在尝试使用我的 Ansible 剧本来调用站点 YAML 引用来创建一个文件名，该文件名可以为多个开关递增。我究竟做错了什么？我相信剧本是从主机 YAML 中提取的吗？

格式:<switch>-<site>-<floor><stackid>.txt

例如:有两个开关:

• swi-lon-101.txt
• swi-lon-202.txt

host_vars/host.yaml

project_name: test
device_name: swi
site_abbrev: lon
device_type: switch
switch_stacks:
- id: 01
  installation_floor: 1
- id: 02
  installation_floor: 2

templates/switch-template.j2

{% for stack in switch_stacks %}
set system host-name {{ device_name }}-{{ site_abbrev }}-{{ stack.installation_floor }}{{ stack.id }}
{% endfor %}

问题所在的剧本，我如何获取主机名以便为 2 个交换机中的每一个正确创建？

我的剧本:

- name: Create Folder Structure
  hosts: junos
  gather_facts: false

  tasks:
    - name: Create Site Specific Folder
      file:
        path: /home/usr/complete_config/{{ project_name }}
        state: directory
        mode: 0755

    - name: Set Destination Directory & Filename for Switch Configurations
      set_fact:
        dest_dir: /home/usr/complete_config/{{ project_name }}
        full_device_name: "{{ device_name|lower }}-{{ site_abbrev|lower }}-{{ switch_stacks.installation_floor }}{{ switch_stacks.id }}.txt"
      when: device_type == 'switch'

Ansible 错误，正在运行:

ansible-playbook playbooks/site-playbook.yaml

TASK [Set Destination Directory & Filename for Switch Configurations] **************************************************
fatal: [site-switch]: FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: 'list object' has no attribute 'installation_floor'\n\nThe error appears to be in '/home/usr/playbooks/switch-playbook.yaml': line 19, column 7, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n    - name: Set Destination Directory & Filename for Switch Configurations\n      ^ here\n"}

Answer 1

因此，您确实需要一个 loop为了设置这个事实，否则，您正在尝试访问列表中的 installation_floor，这是不可能的。

您还将面临 switch_stacks 中项目的 id 问题，因为 01 是一个整数，最终将显示为1，很简单。所以你要么需要将它们声明为字符串，要么用 format filter 填充它们.

所以，你最终完成了这个任务:

- set_fact:
    full_device_name: >-
      {{ 
        full_device_name 
        | default([]) 
        + [
          device_name | lower ~ '-' ~ 
          site_abbrev | lower ~ '-' ~ 
          item.installation_floor  ~  
          "%02d" | format(item.id) ~ '.txt'
        ]
      }}
  loop: "{{ switch_stacks }}"
  when: device_type == 'switch'

这将创建一个列表:

full_device_name:
  - swi-lon-101.txt
  - swi-lon-202.txt

---

给定剧本:

- hosts: localhost
  gather_facts: false

  tasks:
    - set_fact:
        full_device_name: >-
          {{ 
            full_device_name 
            | default([]) 
            + [
              device_name | lower ~ '-' ~ 
              site_abbrev | lower ~ '-' ~ 
              item.installation_floor  ~  
              "%02d" | format(item.id) ~ '.txt'
            ]
          }}
      loop: "{{ switch_stacks }}"
      when: device_type == 'switch'
      vars:
        device_name: swi
        site_abbrev: lon
        device_type: switch
        switch_stacks:
          - id: 01
            installation_floor: 1
          - id: 02
            installation_floor: 2

    - debug: 
        var: full_device_name

这会产生:

TASK [set_fact] ************************************************************
ok: [localhost] => (item={'id': 1, 'installation_floor': 1})
ok: [localhost] => (item={'id': 2, 'installation_floor': 2})

TASK [debug] ***************************************************************
ok: [localhost] => 
  full_device_name:
  - swi-lon-101.txt
  - swi-lon-202.txt