Centos 7.3 镜像制作

小鱼儿 2021-11-22 05:00 339阅读 0赞

## 1.在KVM环境上准备虚拟机磁盘 ##

[root@localhost ~]# qemu-img create -f qcow2 -o size=50G
    /opt/CentOS-7-1511-x86_64_50G.qcow2
    [root@localhost ~]# 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

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。

## 2.使用virt-manager 图形管理工具修改模板虚拟机属性 ##

**2.1****从指定磁盘创建虚拟机**

![1639072-20190713095528662-1982966107.png][]

**2.2****选择存储路径**

![1639072-20190713095530562-727513322.png][]

**2.3** **设置硬件属性**

![1639072-20190713095601331-573210049.png][]

**2.4** **虚拟机名称**

![1639072-20190713095631362-488329207.png][]

**2.5****添加ISO****文件**

![1639072-20190713095635149-1120124217.png][]

**2.6** **选择磁盘驱动**

![1639072-20190713095639744-1572556651.png][]

**2.7****加载系统ISO**

![1639072-20190713095650544-1229994836.png][]

**2.8****选择网卡驱动**

![1639072-20190713095657688-1300732913.png][]

**2.9****修改键盘属性**

![1639072-20190713095729436-1878946950.png][]

**2.10 选择光盘引导安装系统**

![1639072-20190713095749735-1389526462.png][]

**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**

** **

## 4.修改系统信息 ##

**4.1****关闭selinux****和Firewall**

[root@localhost ~]# systemctl stop firewalld.service
    [root@localhost ~]# systemctl disable firewalld.service
    [root@localhost ~]# sed -i 's/SELINUX=enforcing/SELINUX
    =disabled/g' /etc/selinux/config

**4.2****修改网卡配置文件**

[root@localhost ~]# echo 'NOZEROCONF=yes' >>/etc/sysconfig/network
    [root@localhost ~]# 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
    [root@localhost ~]# systemctl stop NetworkManager.service
    [root@localhost ~]# systemctl disable NetworkManager.service
    [root@localhost ~]# /sbin/chkconfig network on

**4.3****修改grub.conf**

[root@localhost ~]# vim /boot/grub2/grub.cfg

添加 console=ttyS0 console=tty0

![1639072-20190713095940679-1498084321.png][]

**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

\[root@localhost ~\]\# systemctl enable sshd.service

\[root@localhost ~\]\# mkdir /root/.ssh权限700

\[root@localhost ~\]\# touch /root/.ssh/authorized\_keys权限644

**4.5** **创建dhclient.conf****文件**

\[root@localhost ~\]\# vi /etc/dhcp/dhclient.conf    添加下面两行

timeout 300;

retry 60;

**4.6** **安装cloud-init**

\[root@localhost ~\]\# yum install cloud-init -y

\[root@localhost ~\]\# vi /etc/cloud/cloud.cfg

![1639072-20190713100029729-431588058.png][]

添加下面内容：

![1639072-20190713100038790-1760822611.png][]

删除下面红框的两行内容：

![1639072-20190713100047700-1675362099.png][]

**4.7** **安装qemu-guest-agent**

[root@localhost ~]# yum -y install qemu-guest-agent
    [root@localhost ~]# systemctl start qemu-guest-agent.service
    [root@localhost ~]# systemctl enable qemu-guest-agent.service

**4.8** **安装cloud-utils-growpart****实现云主机启动时可以自动扩展根分区**

\[root@localhost ~\]\# yum -y install cloud-utils-growpart

生新生成 initramfs:

\[root@localhost ~\]\# dracut –f

等待30秒左右

清除日志   操作记录 ，最后关机。完成

转载于:https://www.cnblogs.com/ajunyu/p/11179575.html

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