hugo daily push 2018-11-27 22:00:01

2018-11-27 22:00:02 +08:00
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+---
+title: "[筆記] Ansible how to use 'list' in yaml file "
+date: 2018-11-27T16:50:53+08:00
+
+noSummary: false
+featuredImage: "https://h.cowbay.org/images/post-default-1.jpg"
+categories: ['筆記']
+tags: ['ansible','linux']
+author: "Eric Chang"
+---
+
+這幾天在玩ansible 時，碰到一個問題
+
+假如我有個yaml檔作為資料來源，檔名是 abc.yml
+
+大概長這樣
+
+```
+    "teams": [
+        {
+            "chinese_name": "TEAM1",
+            "description": "TEAM1",
+            "gid": 10125,
+            "location": [
+                "hq"
+            ],
+            "name": "aa",
+            "users": [
+                "chen",
+                "chou",
+                "huani",
+                "yey",
+                "wa"
+            ]
+        },
+        {
+            "chinese_name": "TEAM2",
+            "description": "TEAM2",
+            "gid": 10126,
+            "location": [
+                "hq"
+            ],
+            "name": "bb",
+            "users": [
+                "chhiao",
+                "chgc",
+                "chy",
+                "hsi",
+                "li",
+                "li",
+                "chgchi"
+            ]
+        }
+		]
+		
+```
+
+<!--more-->
+
+稍微整理一下，比較容易看
+```
+    "teams": [
+        {
+            "chinese_name": "TEAM1",
+            "description": "TEAM1",
+            "gid": 10125,
+            "location": ["hq"],
+            "name": "aa",
+            "users": ["chen","chou","huani","yey","wa"]
+        },
+        {
+            "chinese_name": "TEAM2",
+            "description": "TEAM2",
+            "gid": 10126,
+            "location": ["hq"],
+            "name": "bb",
+            "users": ["chhiao","chgc","chy","hsi","li","chgchi"]
+        }
+		    ]
+		
+```
+
+在 ansible playbook 中，我用 include_vars 把這個檔案叫進來
+```
+- name: load teams.yml
+  tags: env
+  include_vars:
+    file: files/konwen/teams.yml
+```
+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
+
+其中的 location/users 又是另外一個 list
+
+那如果我想要用users這個清單中的id作為建立帳號的來源
+
+我就可以用底下這段，先把 users 裡面的內容，指給 dc_users 這個 localvar
+
+然後加上 when 的條件，限定只有 name == aa 的 users 才會被指定給 dc_users
+
+
+```
+- name: set aa_users
+  tags: env
+  set_fact:
+    aa_users: "{{ item.users }}"
+  when: item.name == 'aa'
+  with_items: "{{ teams }}"
+```
+
+這樣子執行下來是沒有問題的，不過就是醜了點 XD
+
+之後要抓 user 帳號時，就可以直接用 aa_users 來跑迴圈
+
+```
+- name: create folder for aa_users 
+  tags: env
+  file:
+    path: "/tmp/{{ item }}"
+    owner: "{{ item }}"
+    group: "{{ item }}"
+    state: directory
+  with_items: "{{ aa_users }}"
+```
+
+很簡單的概念，因為一開始在 teams 這個 var 裡面
+
+users 這個屬性是一個 list 
+
+p.s 講話一定要參雜用英文單字，這樣看起來比較屌...
+
+所以沒辦法直接在底下的create folder task 直接叫出來
+
+如果直接叫 teams.users ，那會是一個清單
+```
+ ["chen","chou","huani","yey","wa"]
+```
+
+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
+
+所以在 /tmp 底下就會多出一個
+
+> ["chen","chou","huani","yey","wa"]
+
+這個樣子的目錄 ....
+
+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 )
+
+後面的task再用這個 {{ aa_users }} 來跑，這樣子就 OK 了
+
+雖說很簡單，但是卡了我一整天吶...
+