无法优化含when子句的Ansible代码，需将两段YAML合并为单块

可以通过定义系统与包信息的映射关系，将两个任务合并为一个，同时保留原有的系统适配逻辑：

- name: Download Amazon CloudWatch Agent
  get_url:
    url: "{{ cloudwatch_agent_packages[ansible_facts['ansible_distribution']].url }}"
    dest: "{{ cloudwatch_agent_packages[ansible_facts['ansible_distribution']].dest }}"
  vars:
    cloudwatch_agent_packages:
      Debian:
        url: "https://s3.amazonaws.com/amazoncloudwatch-agent/debian/amd64/latest/amazon-cloudwatch-agent.deb"
        dest: "/tmp/temp_files/amazon-cloudwatch-agent.deb"
      RedHat:
        url: "https://s3.amazonaws.com/amazoncloudwatch-agent/redhat/amd64/latest/amazon-cloudwatch-agent.rpm"
        dest: "/tmp/temp_files/amazon-cloudwatch-agent.rpm"
  when: ansible_facts['ansible_distribution'] in ['Debian', 'RedHat']

说明 #

• 通过vars定义cloudwatch_agent_packages字典，将不同系统对应的下载链接和目标路径做统一映射
• 利用ansible_distribution的值作为字典键，动态匹配对应系统的包信息
• 最后通过when条件限定只在Debian或RedHat系统上执行该任务，和原逻辑保持一致

内容的提问来源于stack exchange，提问作者sunny