Ansible项上的循环

Question

我有以下数据作为输入：

list_domains:
  domain1:
    server_name: "domain1.com"
    server_alias:
      - "domain1.fr"
    certificate:
      method: "webroot"
    php_custom_values:
      memory_limit: "128M"
    database:
      type: "mysql"
    cms:
      type: "prestashop"
  domain2:
    server_name: domain2.com
    php_custom_values:
      memory_limit: "512M"

在多个主机上创建多个域。

我使用此循环来创建所有域配置：

tasks:
  - name: "Create domain configuration"
    include_role:
      name: webserver/domain
    loop: "{{ list_domains| dict2items }}"
    loop_control:
      loop_var: domain

但我想只更新一个域配置，当行动手册运行时，域名作为额外的变量

例如：

ansible-playbook domains.yml -e target=domain1

但我没有设法从字典中提取一个条目并在角色中使用它。

Answer 1

简而言之，就是让你走上正轨

---
- name: Not fully tested example only playbook
  hosts: localhost
  gather_facts: false

  vars:

    # Your original data
    list_domains: <your full dict as in example>

    # The loopable list of domains
    my_list: "{{ list_domains| dict2items }}"

  tasks:

    - name: Filter out the list if target is defined
      set_fact:
        my_list: "{{ my_list | selectattr('key', '==', target) }}"
      when: target is defined

    - name: Do the job with the list
      include_role:
        name: webserver/domain
      loop: "{{ my_list }}"
      loop_control:
        loop_var: domain

Answer 2

添加| list会使工作

下面是完整的过滤器：

    - name: Filter out the list if target is defined
  set_fact:
    my_list: "{{ my_list | selectattr('key', '==', target) | list }}"
  when: target is defined