Centos 7.3 镜像制作

卡地亚的生活 發表於 2019-7-12 10:03:00

<h2 class="a">1.在KVM环境上准备虚拟机磁盘</h2>
<div class="cnblogs_code">
<pre># qemu-img create -f qcow2 -o size=50G
/opt/CentOS-7-1511-x86_64_50G.qcow2
# qemu-img info CentOS-7-1511-x86_64_50G.qcow2
image: CentOS-7-1511-x86_64_50G.qcow2
file format: qcow2
virtual size: 50G (53687091200 bytes)
disk size: 196K
cluster_size: 65536
Format specific information:
compat: 1.1
lazy refcounts: false</pre>
</div>
　　备注：-f指定磁盘格式， -o size=40G 指定磁盘文件大小。创建完成后可以使用qemu-img info命令查看磁盘详细信息。
<h2 class="a">2.使用virt-manager 图形管理工具修改模板虚拟机属性</h2>
2.1从指定磁盘创建虚拟机
<img src="https://img2018.cnblogs.com/blog/1639072/201907/1639072-20190713095528662-1982966107.png" alt="">
2.2选择存储路径
 <img src="https://img2018.cnblogs.com/blog/1639072/201907/1639072-20190713095530562-727513322.png" alt="">
2.3 设置硬件属性
 <img src="https://img2018.cnblogs.com/blog/1639072/201907/1639072-20190713095601331-573210049.png" alt="">
2.4 虚拟机名称
 <img src="https://img2018.cnblogs.com/blog/1639072/201907/1639072-20190713095631362-488329207.png" alt="">
2.5添加ISO文件
 <img src="https://img2018.cnblogs.com/blog/1639072/201907/1639072-20190713095635149-1120124217.png" alt="">
2.6 选择磁盘驱动
 <img src="https://img2018.cnblogs.com/blog/1639072/201907/1639072-20190713095639744-1572556651.png" alt="">
2.7加载系统ISO
 <img src="https://img2018.cnblogs.com/blog/1639072/201907/1639072-20190713095650544-1229994836.png" alt="">
2.8选择网卡驱动
 <img src="https://img2018.cnblogs.com/blog/1639072/201907/1639072-20190713095657688-1300732913.png" alt="">
2.9修改键盘属性
<img src="https://img2018.cnblogs.com/blog/1639072/201907/1639072-20190713095729436-1878946950.png" alt="">
2.10 选择光盘引导安装系统
<img src="https://img2018.cnblogs.com/blog/1639072/201907/1639072-20190713095749735-1389526462.png" alt="">
安装系统根据实际需求
 
安装系统注意事项：
　　不能有lvm否则无法实现自动扩系统盘
 
<h2 class="a">4.修改系统信息</h2>
4.1关闭selinux和Firewall
<div class="cnblogs_code">
<pre># systemctl stop firewalld.service
# systemctl disable firewalld.service
# sed -i 's/SELINUX=enforcing/SELINUX
=disabled/g' /etc/selinux/config</pre>
</div>
4.2修改网卡配置文件
<div class="cnblogs_code">
<pre># echo 'NOZEROCONF=yes' >>/etc/sysconfig/network
# cat /etc/sysconfig/network-scripts/ifcfg-eth0
TYPE=Ethernet
BOOTPROTO=dhcp
DEFROUTE=yes
PEERDNS=yes
PEERROUTES=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=eth0
DEVICE=eth0
ONBOOT=yes
PERSISTENT_DHCLIENT=1
# systemctl stop NetworkManager.service
# systemctl disable NetworkManager.service
# /sbin/chkconfig network on   </pre>
</div>
4.3修改grub.conf
<div class="cnblogs_code">
<pre># vim /boot/grub2/grub.cfg</pre>
</div>
添加 console=ttyS0 console=tty0
<img style="display: block; margin-left: auto; margin-right: auto" src="https://img2018.cnblogs.com/blog/1639072/201907/1639072-20190713095940679-1498084321.png" alt="" width="576" height="57">
 
4.4 ssh相关配置
修改sshd配置文件 /etc/ssh/sshd_config
将#PermitRootLogin yes的注释去掉
重新启动SSH服务systemctl  restart  sshd.service
# systemctl enable sshd.service
# mkdir /root/.ssh权限700
# touch /root/.ssh/authorized_keys权限644
4.5 创建dhclient.conf文件
# vi /etc/dhcp/dhclient.conf    添加下面两行
timeout 300;
retry 60;
 4.6 安装cloud-init
# yum install cloud-init -y
# vi /etc/cloud/cloud.cfg
 <img src="https://img2018.cnblogs.com/blog/1639072/201907/1639072-20190713100029729-431588058.png" alt="">
添加下面内容：
 <img src="https://img2018.cnblogs.com/blog/1639072/201907/1639072-20190713100038790-1760822611.png" alt="">
删除下面红框的两行内容：
 <img src="https://img2018.cnblogs.com/blog/1639072/201907/1639072-20190713100047700-1675362099.png" alt="">
4.7 安装qemu-guest-agent
<div class="cnblogs_code">
<pre># yum -y install qemu-guest-agent
# systemctl start qemu-guest-agent.service
# systemctl enable qemu-guest-agent.service</pre>
</div>
4.8 安装cloud-utils-growpart实现云主机启动时可以自动扩展根分区
# yum -y install cloud-utils-growpart
生新生成 initramfs:
# dracut –f
等待30秒左右
清除日志   操作记录，最后关机。完成

</div>
<div id="MySignature" role="contentinfo">
<div>作者：Ajunyu</div>
<div>出处：http://www.cnblogs.com/shwee/

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<div>个人公众号：Ajunyu</div>
<div>---------------------------------------------------</div>
<div>愿今后有酒有肉有姑娘，拿得起欢喜，放得下过往</div></div> 
来源：https://www.cnblogs.com/ajunyu/p/11179575.html

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Centos 7.3 镜像制作