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        "description" : "\u003cp\u003e在ansible中，關於如何引用自定義的變數，一直讓我很頭疼\u003c\/p\u003e\n\u003cp\u003e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\u003c\/p\u003e\n\u003cp\u003e這次還是用selectattr 來處理，希望下次能夠記得\u0026hellip;\u003c\/p\u003e",
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 <title>[ansible] 引用事先定義好的yaml檔裡面的變數 - Ansible Selectattr From List in Dictionary file </title>


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          <span class="date">01 July</span>	<span> / </span>

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            <a href="https://github.com/changchichung" title="Posts by Eric Chang" rel="author">Eric Chang</a>
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            <a href="/categories/ansible">Ansible</a>
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        <div class='entry-header'>
          <h1 class='entry-title'> [ansible] 引用事先定義好的yaml檔裡面的變數 - Ansible Selectattr From List in Dictionary file</h1>
        </div>
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          <div class="entry-content">
            <article>
              <p>在ansible中，關於如何引用自定義的變數，一直讓我很頭疼</p>
<p>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</p>
<p>這次還是用selectattr 來處理，希望下次能夠記得&hellip;</p>
<p>首先是導入的yaml檔案，內容長這樣</p>
<pre><code>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


</code></pre><p>在playbook中，首先先導入這個檔案</p>
<pre><code>- name: load client_host
  include_vars:
    file: client_hosts.yml
    name: ch
</code></pre><p>然後用這個剛剛導入的檔案，去做出想要的清單</p>
<p>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</p>
<pre><code>- name: get internet user list
  set_fact:
    iuser_list: &quot;{{ ch['client_host']['abc.com']|selectattr('iuser','defined')|list }}&quot;
</code></pre><p>然後就可以用來做condition了</p>
<pre><code>- name: copy environment block to /etc/environment
  copy:
   content: |
    PATH=&quot;/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games&quot;
    all_proxy=&quot;{{ proxy_env }}&quot;
    http_proxy=&quot;{{ proxy_env }}&quot;
    https_proxy=&quot;{{ proxy_env }}&quot;
    no_proxy=&quot;localhost,127.0.0.1,192.168.1.1/16,.xyz.com,.abc.com&quot;
   dest: /etc/environment
  when: item.ipv4 == ansible_default_ipv4.address
  with_items: &quot;{{ iuser_list }}&quot;
</code></pre>
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