时间同步，pxe批量自动安装

[root@mariadb-server ~]# yum install  chrony -y    光盘源
[root@mariadb-server ~]# systemctl start chronyd
[root@mariadb-server ~]# systemctl enable  chronyd
[root@mariadb-server ~]# vim /etc/chrony.conf 
# Please consider joining the pool (http://www.pool.ntp.org/join.html).
server ntp.aliyun.com  iburst  #此处为增加的aliyun 服务器

[root@mariadb-server ~]# systemctl restart chronyd
[root@mariadb-server ~]# chronyc sources -v  查看验证成功
210 Number of sources = 1

  .-- Source mode  ‘^‘ = server, ‘=‘ = peer, ‘#‘ = local clock.
 / .- Source state ‘*‘ = current synced, ‘+‘ = combined , ‘-‘ = not combined,
| /   ‘?‘ = unreachable, ‘x‘ = time may be in error, ‘~‘ = time too variable.
||                                                 .- xxxx [ yyyy ] +/- zzzz
||      Reachability register (octal) -.           |  xxxx = adjusted offset,
||      Log2(Polling interval) --.      |          |  yyyy = measured offset,
||                                \     |          |  zzzz = estimated error.
||                                 |    |           MS Name/IP address         Stratum Poll Reach LastRx Last sample               
===============================================================================
^* 203.107.6.88                  2   6    17     5  +1443us[+3286us] +/-   36ms

2、实现cobbler+pxe自动化装机

 注意：不要在办公网，内网等网路测试，最好在虚拟机 新建一个仅主机模式，且关闭vmware 自带的dhcp服务。

 yum install cobbler  dhcp -y
 cd /etc/cobbler/
cp -p dhcp.template dhcp.template.bak
 [root@pxe-cobbler ~]# openssl passwd -1 -salt ‘lcg‘ ‘redhat‘
$1$lcg$Kn6A1VgsDX3JEye.7W2PN0
 #cobbler 配置文件修改
 [root@pxe-cobbler ~]# vim /etc/cobbler/settings
 server: 172.16.16.70
 next_server: 172.16.16.70
 default_password_crypted: "$1$lcg$Kn6A1VgsDX3JEye.7W2PN0"  ( #此处为密码 )
 manage_dhcp: 1  （ 默认为0 ，需要改为1 ，同时注意dhcp 配置文件是否正确）

 systemctl start  cobblerd httpd tftp 

 #dhcp 配置文件
 [root@pxe-cobbler ~]# vim /etc/cobbler/dhcp.template
 subnet 172.16.16.0 netmask 255.255.255.0 {
     option routers             172.16.16.2;
     option domain-name-servers 172.16.16.2;
     option subnet-mask         255.255.255.0;
     range dynamic-bootp        172.16.16.100 172.16.16.254;
     default-lease-time         21600;
     max-lease-time             43200;
     next-server                $next_server;

 root@pxe-cobbler ~]# systemctl restart dhcpd

 #下载相关文件
 [root@pxe-cobbler ~]# cobbler get-loaders
 #文件同步
 [root@pxe-cobbler ~]# cobbler sync

 #添加两个光盘，并连接安装光盘，创建目录，且挂载光盘
 centos6.10   centos7.6
  mkdir /centos6
  mkdir /centos7
  mount /dev/sr0 /centos6
  mount /dev/sr1 /centos7
 # 导入安装源，制作引导菜单
 cobbler import --path=/centos6 --name=Centos6.10-x86_64 --arch=x86_64
 cobbler import --path=/centos7 --name=Centos7.6-x86_64 --arch=x86_64

 #客户机测试，成功

 ## 如要管理自己的ks 应答文件
 cobbler profile add --name Centos6.5-min --distro=Centos6.5-x86_64 --kickstart=/var/lib/cobbler/kickstarts/ks6.cfg

  cobbler profile add --name Centos7.6-min --distro=Centos7.6-x86_64 --kickstart=/var/lib/cobbler/kickstarts/ks7_mini.cfg

 #ks 应答文件制作
 [root@pxe-cobbler ~]# yum install system-config-kickstart -y
 [root@centos6 ~]#system-config-kickstart  
 图形界面 自动打开保存就是 ks文件了

时间同步，pxe批量自动安装

原文：https://blog.51cto.com/8683332/2557352