hugo daily push 2019-07-01 22:00:01

2019-07-01 22:00:01 +08:00
parent 75167c4662
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--- a/content/post/ansible-selectattr-from-list-in-dictionary.md
+++ b/content/post/ansible-selectattr-from-list-in-dictionary.md
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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"
+date: 2019-07-01T09:06:12+08:00
+draft: false
+
+noSummary: false
+featuredImage: "https://h.cowbay.org/images/post-default-7.jpg"
+categories: ['Ansible']
+tags: ['Ansible']
+author: "Eric Chang"
+---
+
+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...
+
+<!--more-->
+
+首先是導入的yaml檔案，內容長這樣
+
+
+```
+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
+```
+- 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
+
+```
+- 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
+
+```
+- 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 }}"
+```
+