实验思维导图：
分析：
本实验要求使用KVM安装三台虚拟机，实现mysql，php，httpd，分布式部署，并完成lamp环境搭建WordPress
搭建整体环境，克隆一台新的虚拟机，在启动之前选择如下，从而使得本机支持虚拟化实现
首先安装kvm环境
[root@qijunchao ~]# yum -y install libvirt-daemon-kvm qemu-kvm virt-manager libvirt
[root@qijunchao ~]# systemctl restart libvirt创建http-fpm网桥
[root@qijunchao ~]# cd /etc/libvirt/qemu/networks/
[root@qijunchao networks]# cp default.xml httpfpm.xml
[root@qijunchao networks]# vim httpfpm.xml #修改指定的mac,uuid,
<network>
<name>httpfpm</name>
<uuid>06a6d52e-6c03-4b29-bdf7-2cfe6d5e937a</uuid>
<bridge name='httpfpm' stp='on' delay='0'/>
<mac address='52:54:00:c6:21:33'/>
<ip address='10.0.0.1' netmask='255.255.255.0'>
<dhcp>
<range start='10.0.0.2' end='10.0.0.254'/>
</dhcp>
</ip>
</network>定义并启动httpfpm网桥
[root@qijunchao ~]# virsh net-define /etc/libvirt/qemu/networks/httpfpm.xml
[root@qijunchao ~]# virsh net-start httpfpm
[root@qijunchao ~]# virsh net-autostart httpfpm创建php-mysql网桥
要求同上，具体如下
[root@qijunchao ~]# cd /etc/libvirt/qemu/networks/
[root@qijunchao networks]# cp httpfpm.xml phpmysql.xml
<network>
<name>phpmysql</name>
<uuid>06a6d52e-6c03-4b29-bdf7-2cfe6d5e937b</uuid>
<bridge name='phpmysql' stp='on' delay='0'/>
<mac address='52:54:00:c6:21:34'/>
<ip address='20.0.0.1' netmask='255.255.255.0'>
<dhcp>
<range start='20.0.0.2' end='20.0.0.254'/>
</dhcp>
</ip>
</network>
[root@qijunchao ~]# virsh net-define /etc/libvirt/qemu/networks/phpmysql.xml
Network phpmysql defined from /etc/libvirt/qemu/networks/phpmysql.xml
[root@qijunchao ~]# virsh net-start phpmysql
Network phpmysql started
[root@qijunchao ~]# virsh net-autostart phpmysql
Network phpmysql marked as autostarted查看创建的网桥状态
[root@qijunchao ~]# virsh net-list
Name State Autostart Persistent
----------------------------------------------------------
default active yes yes
httpfpm active yes yes
phpmysql active yes yes
全部运行
创建物理桥
[root@qijunchao ~]# nmcli connection add type bridge con-name br0 ifname br0
[root@qijunchao ~]# nmcli connection modify br0 ipv4.method manual ipv4.addresses 172.18.253.64/16 ipv4.gateway 172.18.0.1 ipv4.dns 172.18.0.1
[root@qijunchao ~]# nmcli connection up br0
[root@qijunchao ~]# nmcli connection add type bridge-slave ifname ens33 master br0
[root@qijunchao ~]# nmcli connection up bridge-slave-ens33
查看物理网桥，以及虚拟网桥，和自己指定网络端一样
[root@localhost ~]# ifconfig
br0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 172.18.253.64 netmask 255.255.0.0 broadcast 172.18.255.255
inet6 fe80::fa1a:9524:4b58:9ad3 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:c7:a9:bb txqueuelen 1000 (Ethernet)
RX packets 142114 bytes 2595479371 (2.4 GiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 99313 bytes 14884523 (14.1 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
httpfpm: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 10.0.0.1 netmask 255.255.255.0 broadcast 10.0.0.255
ether 52:53:00:c6:21:33 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
phpmysql: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 20.0.0.1 netmask 255.255.255.0 broadcast 20.0.0.255
ether 52:53:00:c6:21:34 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
创建虚拟磁盘文件，因为本机的根环境容量较小，就选择了挂载服务器的指定系统镜像目录，自己在做实验时候，可以下载下来要虚拟机centos镜像文件
[root@qijunchao ~]# mkdir -pv /virtualmachines/centos7_base
[root@qijunchao ~]# qemu-img create -f qcow2 -o size=80G,preallocation=metadata,compat=1.1 /virtualmachines/centos7_base/centos7.img
[root@qijunchao ~]# mount 172.18.0.1:/var/ftp/pub /mnt/
[root@qijunchao ~]# virt-manager 启动虚拟化安装centos7,我们先安装一个模板机，然后直接复制模板机为我们想要的机器
选择网卡为br0这样方便待会我们方便下载仓库
过我已经安装过了，选择指定的centos7镜像，然后，安装到本地的指定目录下/virtualmachines/centos7_base/centos7.img
为了方便，选择了最小化安装，经过几分钟的centos7安装，和平常安装centos7一样
root登陆，在这个模板机器里面我们可以先下载好一些常用命令工具包，net-tools,以及服务，httpd,php-fpm,php-mysql,mariadb-server,php,，这样一会就可以不用再手动配置仓库.
安装完成之后，就可以进行虚拟机的复制了，我们先准备指定目录以及文件
[root@qijunchao ~]# mkdir -pv /virtualmachines/{httpd,php,mysql}
mkdir: created directory ‘/virtualmachines/httpd’
mkdir: created directory ‘/virtualmachines/php’
mkdir: created directory ‘/virtualmachines/mysql’
[root@qijunchao ~]# cp /virtualmachines/centos7_base/centos7.img /virtualmachines/httpd/httpd.img
[root@qijunchao ~]# cp /virtualmachines/centos7_base/centos7.img /virtualmachines/php/php.img
[root@qijunchao ~]# cp /virtualmachines/centos7_base/centos7.img /virtualmachines/mysql/mysql.img通过模板机，配置实际需要三台机器的mac,uuid,以及安装源文件，以httpd为例
[root@qijunchao ~]# cd /etc/libvirt/qemu/
[root@qijunchao qemu]# cp centos7.5.xml httpd.xml
[root@qijunchao qemu]# vim httpd.xml
<name>httpd</name>
<uuid>a8dbf8ae-d691-4f00-835b-3c29ce8972a0</uuid>
<source file='/virtualmachines/httpd/httpd.img'/>
<mac address='52:54:00:cc:f6:d1'/>设置并启动httpd虚拟机，其他两台一样操作
[root@qijunchao qemu]# virsh define httpd.xml
Domain httpd defined from httpd.xml
[root@qijunchao qemu]# virsh autostart httpd
Domain httpd marked as autostarted
[root@qijunchao qemu]# virsh start httpd
Domain httpd started
完成之后，再次
[root@qijunchao ~]# virt-manager 发现已经变成了四台虚拟机了，这时候开始配置网卡
httpd需要两个网卡，一个是172.% 一个为10.% 如图所示分别选择br0和httpfpm网卡最后点右下角apply,再次进入系统后重启网络服务。需要的指定ip段就出来了
php需要20.%和10.%两个网卡，同样设置，在此略
mysql只需20.%网卡就行
至此，三台机器环境搭建完毕。
在httpd机器上设置虚拟网卡
[root@httpd ~]# mkdir -pv /vhosts/pam/htdocs
[root@httpd ~]# cd /etc/httpd/conf.d/
[root@httpd ~]# vim pma.conf
DirectoryIndex index.php
<VirtualHost *:80>
ServerName bbs.magedu.com
DocumentRoot /vhosts/pam/htdocs
<Directory "/vhosts/pam/htdocs">
Require all granted
</Directory>
ProxyRequests Off
ProxyPassMatch ^/(.*\.php)$ fcgi://10.0.0.231:9000/vhosts/pam/htdocs/$1
</VirtualHost> 修改httpd主配置文件。
<IfModule dir_module>
DirectoryIndex index.php index.html
</IfModule>
修改/etc/hosts/配置
[root@httpd ~]# cd /etc/hosts
172.18.253.74 bbs.magedu.com之后重启httpd服务
在php-fpm机器上修改主配置文件/etc/php-fpm.d/www.conf
修改以下配置
listen =0.0.0.o:9000
;listen.allowed_clients = 127.0.0.1
在mysql服务器上，启动mysql，创建数据库，db1, 用户root,密码user1
MariaDB [(none)]> create database db1;
Query OK, 1 row affected (0.00 sec)
MariaDB [(none)]> grant all on db1.* to 'root'@'20.0.0.60' identified by 'user1';
Query OK, 0 rows affected (0.02 sec)在php-fpm上安装wordpress
[root@php ~]# mkdir -pv /vhosts/pam
[root@php ~]# cd /vhosts/pam
[root@php pam]# tar xvf wordpress-4.9.4-zh_CN.tar.gz
[root@php pam]# ln -sv wordpress htdocs现在可以访问htppd服务器了
在物理机浏览器输入172.18.253.74就可以访问你的wordpress了,接着填入你的信息,完成安装即可