Question

我正在编写ansible playbooks，我想要实现的部分任务是从get_url模块中获取文件。

这个剧本需要在一个必须代理的环境中运行，而在另一个没有代理的环境中运行（即文件的提取是直接的）。

我一直在努力使我的代码保持一致，就在这里。注意：我也可以使用变量定义的情况＃1和未定义的情况＃2

group_vars /所有：

---
proxy_env:
  http_proxy: <<i enter my proxy here>>

test.yml：

---
- hosts: control_nodes
  tasks:
    - name: Downloading file through proxy
      get_url:
        url=http://address-that-requires-proxy/file_thru_proxy.txt dest=/root/file_thru_proxy.txt force=yes use_proxy=yes
        when: proxy_env.http_proxy is defined
    - name: Downloading file not through proxy
      get_url:
        url=http://address-that-DOESNOT-require-proxy/file_not_thru_proxy.txt dest=/root/file_not_thru_proxy.txt force=yes
        when: proxy_env.http_proxy is undefined
environment:
  http_proxy: "{{ proxy_env.http_proxy }}"

案例＃1：group_vars / all中的proxy_env.http_proxy已定义，一切正常：

[root@blade8 my_playbooks]# ansible-playbook -i hosts -s test.yml 
...
ok: [blade1]
TASK: [Downloading file through proxy] ************************* 
ok: [blade1]
TASK: [Downloading file not through proxy] ********************* 
skipping: [blade1]
...

案例＃2：group_vars / all中的proxy_env.http_proxy未定义（注释），失败：

[root@blade8 my_playbooks]# ansible-playbook -i hosts -s test.yml 
...
TASK: [Downloading file through proxy] ************************* 
skipping: [blade1]
TASK: [Downloading file not through proxy] ********************* 
failed: [blade1] => {"dest": "/root/file_not_thru_proxy.txt", "failed": true, "response": "Request failed: <urlopen error [Errno -2] Name or service not known>", "state": "absent", "status_code": -1, "url": "http://address-that-DOESNOT-require-proxy/file_not_thru_proxy.txt"}
msg: Request failed
...

跳过第一个任务，因为变量未定义。但第二个应该工作，因为我可以用一个简单的wget命令下载它。

任何想法，发生了什么？或者更好地实施它的任何建议？

Answer 1

问题可能是您在playbook级别设置了http_proxy。因此即使未在group_vars中定义它也会设置。这可能仍会导致get_url尝试通过未定义的代理获取URL ...不知道但值得尝试：

---
- hosts: control_nodes
  tasks:
    - name: Downloading file through proxy
      get_url:
        url: http://address-that-requires-proxy/file_thru_proxy.txt
        dest: /root/file_thru_proxy.txt
        force: yes
        use_proxy: yes
      when: "http_proxy" in proxy_env
      environment:
        http_proxy: "{{ proxy_env.http_proxy }}"
    - name: Downloading file not through proxy
      get_url:
        url: http://address-that-DOESNOT-require-proxy/file_not_thru_proxy.txt
        dest: /root/file_not_thru_proxy.txt
        force: yes
      when: "http_proxy" not in proxy_env

基于变量存在运行一个或另一个任务

1 个答案: