dhcp和ansible

一、搭建DHCP服務(wù)，為局域網(wǎng)內(nèi)用戶提供10.1.1.0/24網(wǎng)段的IP，且租約期默認(rèn)為48小時(shí)
1.安裝軟件包:
yum install -y dhcp*
2.配置服務(wù):

為德宏州等地區(qū)用戶提供了全套網(wǎng)頁(yè)設(shè)計(jì)制作服務(wù)，及德宏州網(wǎng)站建設(shè)行業(yè)解決方案。主營(yíng)業(yè)務(wù)為成都做網(wǎng)站、網(wǎng)站制作、成都外貿(mào)網(wǎng)站建設(shè)、德宏州網(wǎng)站設(shè)計(jì)，以傳統(tǒng)方式定制建設(shè)網(wǎng)站，并提供域名空間備案等一條龍服務(wù)，秉承以專業(yè)、用心的態(tài)度為用戶提供真誠(chéng)的服務(wù)。我們深信只要達(dá)到每一位用戶的要求，就會(huì)得到認(rèn)可，從而選擇與我們長(zhǎng)期合作。這樣，我們也可以走得更遠(yuǎn)！

[root@localhost dhcp]# vim dhcpd.conf 
option domain-name "example.org";
option domain-name-servers ns1.example.org, ns2.example.org;
default-lease-time 172800;
max-lease-time 172800;
log-facility local7;
subnet 10.1.1.0 netmask 255.255.255.0 {
        range 10.1.1.100 10.1.1.200;

3.啟動(dòng)服務(wù)并驗(yàn)證:

systemctl start dhcp
dhclient -d

二、在上述實(shí)驗(yàn)基礎(chǔ)上，實(shí)現(xiàn)DHCP中繼：

# 開(kāi)啟路由轉(zhuǎn)發(fā)功能
vim /etc/sysctl.conf
net.ipv4.ip-forward=1
sysctl -p
# 啟動(dòng)dhcp中繼服務(wù)
dhcrelay dhcp_server_ip

中繼服務(wù)實(shí)際使用中，基本沒(méi)有必要使用。其他網(wǎng)絡(luò)的主機(jī)另外新建一個(gè)dhcp服務(wù)就好，沒(méi)有必要非得使用中繼

三、借助Ansible Playbook自動(dòng)化搭建LNMP環(huán)境（可借助yum）
1.實(shí)驗(yàn)主機(jī):

ansible主機(jī):172.20.10.6
webservers:172.20.10.3
appservers:172.20.10.4

2.ansible主機(jī)免密鑰認(rèn)證
(1)

[root@localhost playbooks]# ssh-keygen  
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa): 
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:LFUqZ3zNLyVoJzwgIo+LzGwHhd2YCnKh7kOl6IZQcZ4 root@localhost
The key's randomart image is:
+---[RSA 2048]----+
|  *o* . . .      |
|ooo@ + o = +     |
|+o+.E . * B = .  |
|*++.   * o + +   |
|=B..  . S   . .  |
|B .    .     .   |
|.=               |
|. .              |
|                 |
+----[SHA256]-----+

(2)

[root@localhost] ssh-copy-id 172.20.10.3
[root@localhost]# ssh-copy-id 172.20.10.4

3.ansible配置文件

[webservers]
172.20.10.3
[appservers]
172.20.10.4

4.定義playbook劇本:

[root@localhost playbooks]# vim lnmp.yml 
---
- hosts: webservers
  remote_user: root

  tasks:
    - name: install nginx
      yum:  name=nginx
    - name: config
      copy: src=/data/nginx.conf  dest=/etc/nginx/nginx.conf
      tags: conf
      notify: restart nginx
    - name: start nginx
      service: name=nginx state=started enabled=yes

  handlers:
    - name: restart nginx  
      service: name=nginx state=restarted

- hosts: appservers 
  remote_user: root

  tasks:
    - name: install services 
      yum: name={{ item }} 
      with_items:
        - mariadb
        - mariadb-server
        - php
        - php-fpm 
        - php-MySQL
    - name:  php-fpm  config
      copy: src=/data/www.conf  dest=/etc/php-fpm.d/www.conf
      notify: restart php-fpm
    - name: start php-fpm
      service: name=php-fpm state=started enabled=yes
    - name : start mysql
      service: name=mariadb  state=started enabled=yes
    - name : config mysql
      shell: mysqladmin -uroot password "centos"
    - name: config php-index-file
      copy: src=/data/index.php  dest=/var/www/html/
    - name: config php-mysql-file
      copy: src=/data/mysql.php  dest=/var/www/html/

  handlers:
    - name: restart php-fpm
      service: name=php-fpm state=restart

(5)執(zhí)行結(jié)果:

(6)測(cè)試:


四、采用Ansible Role方式自動(dòng)化搭建LNMP
1.實(shí)驗(yàn)主機(jī):

ansible主機(jī):172.20.10.6
webservers:172.20.10.3
appservers:172.20.10.4

2.ansible主機(jī)roles目錄:

3.執(zhí)行結(jié)果為：

4.訪問(wèn)測(cè)試為：

文章名稱：dhcp和ansible
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