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---
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title: "[筆記] Ansible how to use 'list' in yaml file "
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date: 2018-11-27T16:50:53+08:00
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noSummary: false
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image: "https://h.cowbay.org/images/post-default-1.jpg"
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categories: ['筆記']
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tags: ['ansible','linux']
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author: "Eric Chang"
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---
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這幾天在玩ansible 時，碰到一個問題
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假如我有個yaml檔作為資料來源，檔名是 abc.yml
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大概長這樣
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```
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"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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```
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<!--more-->
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稍微整理一下，比較容易看
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```
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"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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```
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在 ansible playbook 中，我用 include_vars 把這個檔案叫進來
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```
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- name: load teams.yml
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tags: env
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include_vars:
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file: files/kw/teams.yml
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```
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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
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其中的 location/users 又是另外一個 list
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那如果我想要用users這個清單中的id作為建立帳號的來源
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我就可以用底下這段，先把 users 裡面的內容，指給 dc_users 這個 localvar
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然後加上 when 的條件，限定只有 name == aa 的 users 才會被指定給 dc_users
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```
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- 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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```
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這樣子執行下來是沒有問題的，不過就是醜了點 XD
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之後要抓 user 帳號時，就可以直接用 aa_users 來跑迴圈
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```
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- 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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```
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很簡單的概念，因為一開始在 teams 這個 var 裡面
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users 這個屬性是一個 list
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p.s 講話一定要參雜用英文單字，這樣看起來比較屌...
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所以沒辦法直接在底下的create folder task 直接叫出來
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如果直接叫 teams.users ，那會是一個清單
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```
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["chen","chou","huani","yey","wa"]
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```
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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
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所以在 /tmp 底下就會多出一個
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> ["chen","chou","huani","yey","wa"]
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這個樣子的目錄 ....
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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 )
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後面的task再用這個 {{ aa_users }} 來跑，這樣子就 OK 了
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雖說很簡單，但是卡了我一整天吶...
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