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[ansible] 引用事先定義好的yaml檔裡面的變數 - Ansible Selectattr From List in Dictionary file

在ansible中,關於如何引用自定義的變數,一直讓我很頭疼

尤其是有牽涉到從外部導入yaml檔案時,更是常常讓我不知道到底該怎麼抓出想要的變數

這次還是用selectattr 來處理,希望下次能夠記得…

首先是導入的yaml檔案,內容長這樣

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client_hosts:
abc.com:
- host: hqdc021
ipv4: 192.168.11.21
- host: hqdc022
ipv4: 192.168.11.22
- host: hqdc023
ipv4: 192.168.11.23
- host: hqdc024
ipv4: 192.168.11.24
- host: hqdc025
iuser: True
ipv4: 192.168.11.25
user: [yangj]
- host: hqdc026
ipv4: 192.168.11.26
user: [changp, joy]
- host: hqdc027
ipv4: 192.168.11.27
xyz.com:
- host: dc021
iuser: True
ipv4: 192.168.1.21
user: [tim]
- host: dc022
ipv4: 192.168.1.22
- host: dc023
ipv4: 192.168.1.23
- host: dc024
ipv4: 192.168.1.24
- host: dc025
ipv4: 192.168.1.25
user: [eric]
- host: dc026
ipv4: 192.168.1.26
user: [erica]
- host: dc027
ipv4: 192.168.1.27

在playbook中,首先先導入這個檔案

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- name: load client_host
include_vars:
file: client_hosts.yml
name: ch

然後用這個剛剛導入的檔案,去做出想要的清單

像底下這個,就是指定了client_hosts的 abc.com 這個域名底下,iuser有被定義的資料,再轉成list

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- name: get internet user list
set_fact:
iuser_list: "{{ ch['client_host']['abc.com']|selectattr('iuser','defined')|list }}"

然後就可以用來做condition了

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- name: copy environment block to /etc/environment
copy:
content: |
PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games"
all_proxy="{{ proxy_env }}"
http_proxy="{{ proxy_env }}"
https_proxy="{{ proxy_env }}"
no_proxy="localhost,127.0.0.1,192.168.1.1/16,.xyz.com,.abc.com"
dest: /etc/environment
when: item.ipv4 == ansible_default_ipv4.address
with_items: "{{ iuser_list }}"