規劃

角色：webser
任務： 111為ansible主節點，112,113為被控節點。在ansible主節點遠端一鍵安裝部署httpd，要求執行埠為99，根目錄為/var/www，域名為其節點的IP地址，執行者身份是apache，部署測試頁面（index.html）,並檢查是否部署成功要求有返回資訊。

一、安裝ansible並配置各節點互信

Ansible簡單介紹及安裝部署詳解已講解，有詳細步驟這裡不再演示。

二、建立並配置角色

1. 建立工作目錄

[[email protected] ~]# mkdir /project/{roles,inventory} -pv
[
 
[email protected] ~]# mkdir /project/roles/webser/{tasks,files,templates,vars} -pv

[[email protected] /]# tree /project/
/project/
├── inventory
└── roles
    └── webser
        ├── files
        ├── tasks
        ├── templates
        └── vars

7 directories, 0 files

2. 準備模板檔案，即apache的配置檔案

[
 
[email protected] ~]# cp /etc/httpd/conf/httpd.conf /project/roles/templates/httpd.conf.j2
# 修改配置檔案的內容
[[email protected] ~]# vim /project/roles/webser/templates/httpd.conf.j2
Listen {{ port }}
User {{ user }}
Group {{ user }}
ServerName {{ ansible_eth0.ipv4.address }}

[[email protected] ~]# grep "^[a-zA-Z]" /project/roles/webser/templates/httpd.conf.j2
ServerRoot "/etc/httpd"
Listen {{ port }}
Include conf.modules.d/*.conf
User {{ user }}
Group {{ user }}
ServerAdmin 
 
[email protected]
ServerName {{ ansible_eth0.ipv4.address }}
DocumentRoot "{{ root }}"
ErrorLog "logs/error_log"
LogLevel warn
AddDefaultCharset UTF-8
EnableSendfile on
IncludeOptional conf.d/*.conf

3. 建立web頁面測試檔案

[[email protected] ~]# echo "<h1> test page</h1>">/project/roles/webser/files/index.html

4. 編寫用於做健康檢查的指令碼

[[email protected] ~]# cd /project/roles/webser/files/
[[email protected] files]# vim check.sh
#!/bin/bash
URL=$1
PORT=$2

curl -I http://$1:$2/index.html |grep "200 OK" &>/dev/null

if [ $? -eq 0 ];then
    echo "$1 status is ok"
else
    echo "$1 status is error"
fi

5. 建立job

[[email protected] files]# cd /project/roles/webser/tasks/
[[email protected] tasks]# vim main.yaml
---
- name: install https
  yum: name=httpd state=present
- name: make configrantion file
  template: src=httpd.conf.j2 dest=/etc/httpd/conf/httpd.conf
- name: start httpd
  service: name=httpd state=restarted
- name: install test page
  copy: src=index.html dest={{ root }}
- name: make health check
  shell: sh roles/webser/files/check.sh {{ ansible_eth0.ipv4.address }} {{ port }}
  delegate_to: localhost
  register: health_status
- debug: msg="{{ health_status }}"

6. 建立主機清單列表

[[email protected] tasks]# cd /project/inventory/
[[email protected] inventory]# vim webser
[webser]
10.220.5.112
10.220.5.113

7. 建立入口檔案

[[email protected] inventory]# cd /project/
[[email protected] project]# vim webser.yaml       <<<該檔案需要和roles目錄同級
---
- host: all
  remote_user: root
  roles:
    - webser              

三、執行palybook

[[email protected] files]# cd /project/
[[email protected] project]# ansible-playbook -i ./inventory/webser ./webser.yaml -e port=99 -e user=apache -e root=/var/www

執行結果是成功的，並且到112,113節點檢視也看到httpd安裝部署成功，從瀏覽器訪問後端節點也是能夠訪問到測試頁面的，至此通過ansible使用角色一鍵部署靜態網站就大功告成了。

------做運維之前很矯情的小年輕-----