我有一个主机组,该主机组具有如下所示的主机变量
[test:children]
test1
test2
test3
[test:vars]
clean_images=true
我的任务定义如下,
- name: clean docker images
template:
dest: "/etc/systemd/system/{{ item.name }}"
with_items:
- { name: "{{ service_name }}.service" }
- name: start service
systemd:
name: "{{ service_name }}.service"
state: started
enabled: yes
when: hostvars['test'].clean_images is defined
这是一个简单的任务,其中我根据主机清理docker映像。我有一本剧本,可以在另一组主机组[test_services]中执行上述角色。我希望任务-名称:启动服务在 [test:children] 中定义的任何主机组中运行。要检查是否已将变量 clean_images = true 添加到 test 组以执行条件检查
但是我上面包含的何时语句给我一个错误
fatal: [xx.xx.xx.xx]: FAILED! => {"msg": "The conditional check 'hostvars['test'].clean_images is defined' failed. The error was: error while evaluating conditional (hostvars['test'].clean_images is defined): \"hostvars['test']\" is undefined\n\nThe error appears to have been in 'main.yml'
我在使用何时建立此条件语句时遇到问题,任何帮助都会很棒。
答案 0 :(得分:2)
when: hostvars['test'].clean_images is defined
应该只是:
when: clean_images is defined and clean_images
因为没有名为test
的主机,因此test
的 host vars将永远不存在。然而,属于组的所有主机都将定义test