仅当主机不属于组时才运行任务

Question

只有当前剧本的主持人不属于某个组时,我才能运行一个ansible任务.在半伪代码中:

- name: my command
  command: echo stuff
  when: "if {{ ansible_hostname }} not in {{ ansible_current_groups }}"

我该怎么做？

Answer 1

这是另一种方法:

- name: my command
  command: echo stuff
  when: "'groupname' not in group_names"

group_names是一个神奇的变量,如下所示:http://docs.ansible.com/playbooks_variables.html#magic-variables-and-how-to-access-information-about-other-hosts:

group_names是当前主机所在的所有组的列表(数组).

Answer 2

您可以在位于group_vars/hosts文件中或直接在hosts文件中的vars文件中设置控制变量,如下所示:

[vagrant:vars]
test_var=true

[location-1]
192.168.33.10 hostname=apollo

[location-2]
192.168.33.20 hostname=zeus

[vagrant:children]
location-1
location-2

并运行这样的任务:

- name: "test"
  command: "echo {{test_var}}"
  when: test_var is defined and test_var

Answer 3

我想出了这个：

- name: my command
  command: echo stuff
  when: inventory_hostname not in groups.get('your-group', [])