多活动活动 發表於 2019-7-8 19:15:00

centos 7.3镜像制作

<h3>1.在KVM环境上准备虚拟机磁盘</h3>
<p># qemu-img create -f qcow2 -o size=50G</p>
<p>/opt/CentOS-7-1511-x86_64_50G.qcow2</p>
<p># qemu-img info CentOS-7-1511-x86_64_50G.qcow2</p>
<p>image: CentOS-7-1511-x86_64_50G.qcow2</p>
<p>file format: qcow2</p>
<p>virtual size: 50G (53687091200 bytes)</p>
<p>disk size: 196K</p>
<p>cluster_size: 65536</p>
<p>Format specific information:</p>
<p>compat: 1.1</p>
<p>lazy refcounts: false</p>
<p>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。</p>
<h3>2.使用virt-manager 图形管理工具修改模板虚拟机属性</h3>
<h4>2.1从指定磁盘创建虚拟机</h4>
<p><img style="margin: 0; display: inline; background-image: none" title="clip_image002" src="https://img2018.cnblogs.com/blog/1629934/201907/1629934-20190713150933428-1580748560.jpg" alt="clip_image002" width="233" height="244" border="0"></p>
<h4>2.2选择存储路径</h4>
<p><img style="margin: 0; display: inline; background-image: none" title="clip_image004" src="https://img2018.cnblogs.com/blog/1629934/201907/1629934-20190713150945267-1653006473.jpg" alt="clip_image004" width="244" height="220" border="0"></p>
<h4>2.3 设置硬件属性</h4>
<p><img style="margin: 0; display: inline; background-image: none" title="clip_image006" src="https://img2018.cnblogs.com/blog/1629934/201907/1629934-20190713150959711-657792232.jpg" alt="clip_image006" width="232" height="244" border="0"></p>
<h4>2.4 虚拟机名称</h4>
<p><strong><img style="margin: 0; display: inline; background-image: none" title="clip_image008" src="https://img2018.cnblogs.com/blog/1629934/201907/1629934-20190713151016072-1101959384.jpg" alt="clip_image008" width="231" height="244" border="0"></strong></p>
<h4>2.5添加ISO文件</h4>
<p><img style="margin: 0; display: inline; background-image: none" title="clip_image010" src="https://img2018.cnblogs.com/blog/1629934/201907/1629934-20190713151034508-124625886.jpg" alt="clip_image010" width="244" height="173" border="0"></p>
<h4>2.6 选择磁盘驱动</h4>
<p><img style="margin: 0; display: inline; background-image: none" title="clip_image012" src="https://img2018.cnblogs.com/blog/1629934/201907/1629934-20190713151046855-1680361200.jpg" alt="clip_image012" width="244" height="157" border="0"></p>
<h4>2.7加载系统ISO</h4>
<p><img style="margin: 0; display: inline; background-image: none" title="clip_image014" src="https://img2018.cnblogs.com/blog/1629934/201907/1629934-20190713151058529-361240304.jpg" alt="clip_image014" width="244" height="99" border="0"></p>
<h4>2.8选择网卡驱动</h4>
<p><img style="margin: 0; display: inline; background-image: none" title="clip_image016" src="https://img2018.cnblogs.com/blog/1629934/201907/1629934-20190713151113932-814652193.jpg" alt="clip_image016" width="244" height="152" border="0"></p>
<h4>2.9修改键盘属性</h4>
<p><img style="margin: 0; display: inline; background-image: none" title="clip_image018" src="https://img2018.cnblogs.com/blog/1629934/201907/1629934-20190713151126478-1526002753.jpg" alt="clip_image018" width="244" height="158" border="0"></p>
<h3>3选择光盘引导安装系统</h3>
<p><img style="margin: 0; display: inline; background-image: none" title="clip_image020" src="https://img2018.cnblogs.com/blog/1629934/201907/1629934-20190713151138347-1894584385.jpg" alt="clip_image020" width="244" height="180" border="0"></p>
<p><strong>安装系统根据实际需求</strong></p>
<p><strong>安装系统注意事项：</strong></p>
<p><strong>1、 </strong><strong>不能有lvm否则无法实现自动扩系统盘</strong></p>
<h3>4.修改系统信息</h3>
<h4>4.1关闭selinux和Firewall</h4>
<p># systemctl stop firewalld.service</p>
<p># systemctl disable firewalld.service</p>
<p># sed -i 's/SELINUX=enforcing/SELINUX</p>
<p>=disabled/g' /etc/selinux/config</p>
<h4>4.2修改网卡配置文件</h4>
<p># echo 'NOZEROCONF=yes' &gt;&gt;/etc/sysconfig/network</p>
<p># cat /etc/sysconfig/network-scripts/ifcfg-eth0</p>
<p>TYPE=Ethernet</p>
<p>BOOTPROTO=dhcp</p>
<p>DEFROUTE=yes</p>
<p>PEERDNS=yes</p>
<p>PEERROUTES=yes</p>
<p>IPV4_FAILURE_FATAL=no</p>
<p>IPV6INIT=yes</p>
<p>IPV6_AUTOCONF=yes</p>
<p>IPV6_DEFROUTE=yes</p>
<p>IPV6_PEERDNS=yes</p>
<p>IPV6_PEERROUTES=yes</p>
<p>IPV6_FAILURE_FATAL=no</p>
<p>IPV6_ADDR_GEN_MODE=stable-privacy</p>
<p>NAME=eth0</p>
<p>DEVICE=eth0</p>
<p>ONBOOT=yes</p>
<p>PERSISTENT_DHCLIENT=1</p>
<p># systemctl stop NetworkManager.service</p>
<p># systemctl disable NetworkManager.service</p>
<p># /sbin/chkconfig network on</p>
<h4>4.3修改grub.conf</h4>
<p># vim /boot/grub2/grub.cfg</p>
<p>添加 console=ttyS0 console=tty0</p>
<p><img style="display: inline; background-image: none" title="clip_image022" src="https://img2018.cnblogs.com/blog/1629934/201907/1629934-20190713151152404-1228636992.jpg" alt="clip_image022" width="476" height="55" border="0"></p>
<h4>4.4 ssh相关配置</h4>
<p>修改sshd配置文件 /etc/ssh/sshd_config</p>
<p>将#PermitRootLogin yes的注释去掉</p>
<p>重新启动SSH服务systemctl restart sshd.service</p>
<p># systemctl enable sshd.service</p>
<p># mkdir /root/.ssh权限700</p>
<p># touch /root/.ssh/authorized_keys权限644</p>
<h4>4.5 创建dhclient.conf文件</h4>
<p># vi /etc/dhcp/dhclient.conf 添加下面两行</p>
<p>timeout 300;</p>
<p>retry 60;</p>
<h4>4.6 安装cloud-init</h4>
<p># yum install cloud-init -y</p>
<p># vi /etc/cloud/cloud.cfg</p>
<p><strong><img style="display: inline; background-image: none" title="clip_image024" src="https://img2018.cnblogs.com/blog/1629934/201907/1629934-20190713151205144-1632712398.jpg" alt="clip_image024" width="376" height="300" border="0"></strong></p>
<p>添加下面内容：</p>
<p><img style="display: inline; background-image: none" title="clip_image026" src="https://img2018.cnblogs.com/blog/1629934/201907/1629934-20190713151218045-1644390176.jpg" alt="clip_image026" width="448" height="435" border="0"></p>
<p>删除下面红框的两行内容：</p>
<p><img style="margin: 0 5px 5px; display: inline; background-image: none" title="clip_image028" src="https://img2018.cnblogs.com/blog/1629934/201907/1629934-20190713151237802-2115213133.jpg" alt="clip_image028" width="423" height="538" border="0"></p>
<h4>4.7 安装qemu-guest-agent</h4>
<p># yum -y install qemu-guest-agent</p>
<p># systemctl start qemu-guest-agent.service</p>
<p># systemctl enable qemu-guest-agent.service</p>
<h4>4.8 安装cloud-utils-growpart实现云主机启动时可以自动扩展根分区</h4>
<p># yum -y install cloud-utils-growpart</p>
<p>生新生成 initramfs:</p>
<p># dracut –f</p>
<p>等待30秒左右</p>
<p>清除日志 操作记录 ，最后关机。完成</p><br><br>
来源：https://www.cnblogs.com/liangzb310/p/11180712.html
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