Ansible-将清单主机和变量读取到group_vars/所有文件 [英] Ansible - read inventory hosts and variables to group_vars/all file

问题描述

我有一个很奇怪的疑问，使我长期困扰.我有一个非常普通的清单文件，其中包含主机和变量:

I have a dummy doubt that keeps me stuck for a long time. I have a very banal inventory file with hosts and variables:

[lb]
10.112.84.122

[tomcat]
10.112.84.124

[jboss5]
10.112.84.122

...

[tests:children]
lb
tomcat
jboss5

[default:children]
tests

[tests:vars]
data_base_user=NETWIN-4.3
data_base_password=NETWIN
data_base_encrypted_password=
data_base_host=10.112.69.48
data_base_port=1521
data_base_service=ssdenwdb
data_base_url=jdbc:oracle:thin:@10.112.69.48:1521/ssdenwdb

问题是我需要从group_vars/all文件访问清单文件中的所有这些主机和变量.

The problem is that I need to access all these hosts and variables, in the inventory file, from the group_vars/all file.

我尝试了以下几种方式访问​​主机IP:

I've tried the following manners to access the host IP:

{{ lb }}
"{{ hostvars[lb] }}"
"{{ hostvars['lb'] }}"
{{ hostvars[lb] }}

我尝试访问主机变量:

"{{ hostvars[tests].['data_base_host'] }}"

所有人都错了！！！谁能帮我找到访问主机和变量的最佳实践，而不是从剧本中，而是从变量文件中?

All of them are wrong!!! Can anyone help me find out the best practice to access hosts and variables, not from a playbook but from a variables file?

好的.让我们澄清一下.

Ok. Let's clarify.

问题:使用清单文件中声明的主机作为变量文件，例如:group_vars/all.

Problem: Use a host declared in the inventory file in a variable file, let's say: group_vars/all.

示例:我有一个具有IP:10.112.83.37的数据库主机.

Example: I have a DB host with IP:10.112.83.37.

库存文件:

[db]
10.112.83.37

在group:vars/all文件中，我想使用该IP来构建变量.

In the group:vars/all file I want to use that IP to build a variable.

group_vars/所有文件:

group_vars/all file:

data_base_url=jdbc:oracle:thin:@{{ db }}:1521/ssdenwdb

在模板中，我使用了group_vars/all文件中内置的变量.

In a template I use the variable built in the group_vars/all file.

模板文件:

oracle_url = {{ data_base_url }}

问题是group_vars/all文件中的{{ db }}变量没有被数据库主机IP替换.用户只能编辑库存文件.

The problem is that the {{ db }} variable in the group_vars/all file is not replaced by the DB host IP. The user can only edit the inventory file.

推荐答案

- name: host
   debug: msg="{{ item }}" 
   with_items:
    - "{{ groups['tests'] }}"

这段代码将给出消息:

'10.112.84.122'
'10.112.84.124'

如groups['tests']基本上返回唯一IP地址列表['10.112.84.122','10.112.84.124']，而groups['tomcat'][0]返回10.112.84.124.

as groups['tests'] basically return a list of unique ip addresses ['10.112.84.122','10.112.84.124'] whereas groups['tomcat'][0] returns 10.112.84.124.

这篇关于Ansible-将清单主机和变量读取到group_vars/所有文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！