在Ansible剧本中指定多个默认组作为主机

问题描述

我正在寻找一种在Ansible剧本中将多个默认组指定为主机的方法.我一直在使用这种方法:

I'm looking for a way to specify multiple default groups as hosts in an Ansible playbook. I've been using this method:

- name:  Do things on hosts
  hosts: "{{ specific_hosts | default('development') }}"
  tasks:  # do things on hosts

但是，我试图避免手动指定主机(容易出错)，并且如果要对多个服务器组(例如，开发和质量检查).

However I'm trying to avoid specifying hosts manually (it is error-prone), and the default hosts are inadequate if I want to run the same tasks against multiple groups of servers (for instance, development and QA).

我不知道这在剧本中是否可以实现:

I don't know if this is possible in a playbook:

- name:  Do things on hosts
  hosts: "{{ specific_hosts | default('development') && default('qa') }}"

我不知道库存中是否有这种可能:

I don't know if this is possible in an inventory:

[development]
1.2.3.4

[qa]
2.3.4.5

[dev_plus_qa]
development
qa

也不希望创建多个冗余任务-我想避免强迫用户指定 specific_qa_hosts (例如)，并且我想避免代码重新定位:

Creating multiple redundant tasks is undesirable as well - I would like to avoid forcing users to specify specific_qa_hosts (for instance) and I would like to avoid code repitition:

- name: Do things on DEV
  hosts: "{{ specific_hosts | default('development') }}"
- name: Do things on QA
  hosts: "{{ specific_hosts | default('qa') }}"

有什么优雅的方法可以做到这一点吗?

Is there any elegant way of accomplishing this?

推荐答案

这确实是可能的，并且在针对主机和群组的通用模式 Ansible文档.

This is indeed possible and is described in the common patterns targeting hosts and groups documentation of Ansible.

因此，针对两个组就像 hosts:group1:group2 这样简单，因此，您的剧本就变成了:

So targeting two groups is as simple as hosts: group1:group2, and, so, your playbook becomes:

- name:  Do things on hosts
  hosts: "{{ specific_hosts | default('development:qa') }}"

---

如果您想通过广告资源实现此目标，也可以使用如文档示例中所述:

因此，您的情况应该是:

So in your case, it would be:

[development]
1.2.3.4

[qa]
2.3.4.5

[dev_plus_qa:children]
development
qa

然后，作为一本剧本:

- name:  Do things on hosts
  hosts: "{{ specific_hosts | default('dev_plus_qa') }}"

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