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ansible - 使用 ansible 动态添加子组

问题描述

我想动态重现以下静态库存：

novaclient ansible_connection=local

[masters]
192.168.13.236

[nodes]
192.168.13.201
192.168.13.237

[cluster:children]
masters
nodes

阅读 ansible 文档，该add_host模块似乎是正确的候选者，因为它旨在将主机（或者一个组）添加到 ansible-playbook in-memory inventory。这是我的剧本：

- hosts: all

  connection: local

  vars:
    ips_per_group:
      - ["masters", "192.168.13.236"]
      - ["nodes"  , "192.168.13.201"]
      - ["nodes"  , "192.168.13.237"]

  tasks:

    - name: add host dynamically
      add_host:
        name: "{{ item[1] }}"
        groups: "{{ item[0] }}" 
      loop: "{{ ips_per_group }}"

    - name: add masters and nodes groups to cluster group
      add_host:
        name: "{{ item[0] }}"
        groups: "cluster"
      loop: "{{ ips_per_group }}"

    - name: test
      debug:
        var: groups

运行该剧本会触发以下警告：

 [WARNING]: Found both group and host with same name: masters
 [WARNING]: Found both group and host with same name: nodes

据我了解，这些警告来自这样一个事实，masters并且nodes尚未被宣布children为该cluster组的成员。尝试以下语法：

- name: add masters and nodes groups to cluster group
  add_host:
    name: "{{ item }}"
    groups: "cluster:children"
  loop:
    - masters

由于groups名称中的冒号触发以下警告：

 [WARNING]: Invalid characters were found in group names but not replaced, use -vvvv to see details

你有什么想法在没有任何警告的情况下这样做吗？

谢谢

标签： ansible

解决方案

可以使用group_by – 根据事实创建 Ansible 组。使用修改后的数据结构，使示例更简单，下面的剧本展示了它是如何工作的。

- name: 1.Create my_groups
  hosts: localhost
  gather_facts: false
  vars:
    ips_per_group:
      192.168.13.236:
        my_groups: ['masters']
        my_children_group: 'cluster'
      192.168.13.201:
        my_groups: ['nodes']
        my_children_group: 'cluster'
      192.168.13.237:
        my_groups: ['nodes']
        my_children_group: 'cluster'
  tasks:
    - name: add host dynamically
      add_host:
        name: "{{ item.key }}"
        groups: "{{ item.value.my_groups }}" 
        group_children: "{{ item.value.my_children_group }}"
      loop: "{{ ips_per_group|dict2items }}"
    - debug:
        var: groups

- name: 2.Create children for group masters
  hosts: masters
  gather_facts: false
  tasks:
    - name: add hosts to children groups
      group_by:
        key: "{{ group_children }}"
    - debug:
        var: groups

- name: 3.Create children for group nodes
  hosts: nodes
  gather_facts: false
  tasks:
    - name: add hosts to children groups
      group_by:
        key: "{{ group_children }}"
    - debug:
        var: groups

- name: 4.Test group cluster
  hosts: cluster
  gather_facts: false
  tasks:
    - debug:
        var: group_children
    - debug:
        var: groups

- name: 5.Print groups
  hosts: localhost
  tasks:
    - debug:
        var: groups

播放“5.Print groups”给出

"groups": {
    "all": [
        "192.168.13.201", 
        "192.168.13.236", 
        "192.168.13.237"
    ], 
    "cluster": [
        "192.168.13.236", 
        "192.168.13.201", 
        "192.168.13.237"
    ], 
    "masters": [
        "192.168.13.236"
    ], 
    "nodes": [
        "192.168.13.201", 
        "192.168.13.237"
    ], 
    "ungrouped": []
}

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