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<h3><a href="/post/ansible-selectattr/">[筆記] Ansible how to use 'list' in yaml file </a></h3>
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<div class="meta">
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<span class="date moment">2018-11-27</span>
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<a href="/categories/%E7%AD%86%E8%A8%98">筆記</a>
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</span>
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<span class="author"><a href="/author/eric-chang">Eric Chang</a></span>
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</div>
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<p>這幾天在玩ansible 時，碰到一個問題</p>
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<p>假如我有個yaml檔作為資料來源，檔名是 abc.yml</p>
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<p>大概長這樣</p>
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<pre><code> "teams": [
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{
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"chinese_name": "TEAM1",
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"description": "TEAM1",
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"gid": 10125,
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"location": [
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"hq"
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],
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"name": "aa",
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"users": [
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"chen",
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"chou",
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"huani",
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"yey",
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"wa"
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]
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},
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{
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"chinese_name": "TEAM2",
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"description": "TEAM2",
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"gid": 10126,
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"location": [
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"hq"
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],
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"name": "bb",
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"users": [
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"chhiao",
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"chgc",
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"chy",
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"hsi",
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"li",
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"li",
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"chgchi"
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]
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}
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]
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</code></pre>
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<p></p>
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<p>稍微整理一下，比較容易看</p>
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<pre><code> "teams": [
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{
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"chinese_name": "TEAM1",
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"description": "TEAM1",
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"gid": 10125,
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"location": ["hq"],
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"name": "aa",
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"users": ["chen","chou","huani","yey","wa"]
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},
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{
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"chinese_name": "TEAM2",
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"description": "TEAM2",
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"gid": 10126,
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"location": ["hq"],
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"name": "bb",
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"users": ["chhiao","chgc","chy","hsi","li","chgchi"]
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}
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]
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</code></pre>
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<p>在 ansible playbook 中，我用 include_vars 把這個檔案叫進來</p>
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<pre><code>- name: load teams.yml
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tags: env
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include_vars:
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file: files/konwen/teams.yml
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</code></pre>
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<p>這時候在這個執行階段，就會有一個變數叫 teams 裡面有 chinese_name/description/gid 等等這些屬性</p>
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<p>其中的 location/users 又是另外一個 list</p>
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<p>那如果我想要用users這個清單中的id作為建立帳號的來源</p>
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<p>我就可以用底下這段，先把 users 裡面的內容，指給 dc_users 這個 localvar</p>
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<p>然後加上 when 的條件，限定只有 name == aa 的 users 才會被指定給 dc_users</p>
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<pre><code>- name: set aa_users
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tags: env
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set_fact:
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aa_users: "{{ item.users }}"
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when: item.name == 'aa'
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with_items: "{{ teams }}"
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</code></pre>
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<p>這樣子執行下來是沒有問題的，不過就是醜了點 XD</p>
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<p>之後要抓 user 帳號時，就可以直接用 aa_users 來跑迴圈</p>
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<pre><code>- name: create folder for aa_users
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tags: env
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file:
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path: "/tmp/{{ item }}"
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owner: "{{ item }}"
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group: "{{ item }}"
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state: directory
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with_items: "{{ aa_users }}"
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</code></pre>
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<p>很簡單的概念，因為一開始在 teams 這個 var 裡面</p>
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<p>users 這個屬性是一個 list</p>
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<p>p.s 講話一定要參雜用英文單字，這樣看起來比較屌…</p>
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<p>所以沒辦法直接在底下的create folder task 直接叫出來</p>
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<p>如果直接叫 teams.users ，那會是一個清單</p>
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<pre><code> ["chen","chou","huani","yey","wa"]
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</code></pre>
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<p>然後 ansible 也很厲害，就這個樣子，他還是會去忠實的執行建立目錄</p>
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<p>所以在 /tmp 底下就會多出一個</p>
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<blockquote>
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<p>[“chen”,“chou”,“huani”,“yey”,“wa”]</p>
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</blockquote>
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<p>這個樣子的目錄 ….</p>
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<p>所以我的處理方式就是先把這個清單丟給一個local變數 ( aa_users )</p>
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<p>後面的task再用這個 {{ aa_users }} 來跑，這樣子就 OK 了</p>
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<p>雖說很簡單，但是卡了我一整天吶…</p>
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