Technical document: Cobbler automatic deployment and installation (super simple teaching)

Cobbler is an open source project developed using Python. It provides a fully automated and batch network installation environment for quickly establishing a Linux system by integrating all the services involved in the deployment system.

Experiment preparation

• A Linux server (Centos7 system, what configuration is best not)
• A blank virtual machine (no mirror selected)
• Need to connect to the Internet, and all virtual machines use NAT mode

experiment procedure

1. Build an online yum source

wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo

Two, automatically load the online update source

yum list				                

Three, install Cobbler and its related service packages

yum install -y cobbler dhcp tftp-server pykickstart httpd rsync xinetd 

The functions of each software are as follows:

cobbler	Used to quickly establish a Linux network installation environment
dhcp	Used to automatically assign IP addresses to blank hosts
tftp-server	Provide boot image file download
pykickstart	Implement unattended installation
httpd	Run as a console program
rsync	Realize data synchronization
xinetd	Provide access control, enhanced log and resource management functions

安装完之后最好查一下是不是都安装上了
rpm -q  cobbler dhcp tftp-server pykickstart httpd rsync xinetd

Fourth, modify the main configuration file of cobbler

vim /etc/cobbler/settings
next_server: 192.168.153.10       	#指向tftp服务器的IP，即本机IP
server: 192.168.153.10		    	#指向cobbler服务器的IP，即本机IP
manage_dhcp: 1                 		#让cobbler管理dhcp服务
manage_rsync: 1					    #让cobbler管理rsync服务
manage_tftpd: 1				      	#让cobbler管理tftp服务

Five, start related services and close the firewall and selinux

systemctl start httpd.service		            #开启http服务
systemctl start cobblerd.service	        	#开启cobbler服务
systemctl stop firewalld.service           	    #关闭防火墙
setenforce 0          

Six, open tftp service and rsync service

6.1 Modify the configuration file of tftp

vim /etc/xinetd.d/tftp

6.2 Start service

systemctl restart xinetd.service
systemctl start rsyncd.service

Seven, download the boot operating system file

cobbler get-loaders

Eight, set the initial password of the Cobbler user

8.1 Use salt encryption to generate keys

openssl passwd -1 -salt '123456' '123456'      #' '里为安装的虚拟机系统的root密码

8.2 Add the generated key to the Cobbler configuration file

vim /etc/cobbler/settings

Nine, configure dhcp service

9.1 Modify the template file of Cobbler management dhcp service

vim /etc/cobbler/dhcp.template

9.2 Synchronize the configured template file to the configuration file of the DHCP service

cobbler sync

9.3 Restart the DHCP service

systemctl restart dhcpd.service

10. Import ISO image file

10.1 Mount image file

mount /dev/sr0 /mnt

10.2 Import the Linux kernel in the iso image and initialize the image file

cobbler import --path=/mnt/ --name=CentOS-7-x86_64 --arch=x86_64  

10.3 Check whether the kernel and initialization files are in the tftp-server shared directory

yum install -y tree 			#系统默认没有安装，需手动安装tree
tree /var/lib/tftpboot/images	#查看文件是否存在

11. Restart all services

systemctl restart cobblerd.service
systemctl restart dhcpd.service
systemctl restart xinetd.service
systemctl restart httpd.service

12. Use cobbler check to check the settings of Cobbler

Note that the configuration is completed when the check result is consistent with the above figure, but there is another situation:

If the content of the yellow box in the figure appears, there is actually no problem with the configuration, but you can change it if you are not worried:

systemctl start rsyncd.service
systemctl enable rsyncd.service

13. After all configurations are completed, open the blank host to automatically install the system

Note: This installation method is a minimal installation, and the installed system only has a character interface

14. If you need a graphical interface, you can install it manually

yum list
yum -y groupinstall "server with GUI"