surroundings:

[ root@kickstart ~]# cat /etc/redhat-release
CentOS Linux release 7.4.1708(Core)[root@kickstart ~]# uname -r
3.10.0- 693. el7.x86_64
[ root@kickstart ~]# getenforce
Disabled
[ root@kickstart ~]# systemctl status  firewalld.service
● firewalld.service - firewalld - dynamic firewall daemon
 Loaded:loaded(/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
 Active:inactive(dead)
  Docs: man:firewalld(1)[root@kickstart ~]# hostname -I
10.0.0.201172.16.1.201

Preface#

Cobbler installation is relatively simple, mainly web page operation, little by little, compared to PXE+kickstart network installation is simpler.

If you don’t understand the principle of the PXE+kickstart network installation system process, I suggest you to check out the <PXE+kickstart网络安装CentOS7.4系统及过程中各种报错> <-- poke me

cobbler installation#

1、 Download cobbler and related software##

[ root@Cobbler ~]# yum -y install cobbler cobbler-web dhcp tftp-server pykickstart httpd

2、 Check and change configuration##

Note: You need to start httpd service and cobbler service on CentOS7 to check

[ root@Cobbler ~]# systemctl start cobblerd.service httpd.service
[ root@Cobbler ~]# cobbler check
The following are potential configuration items that you may want to fix:1: The 'server' field in/etc/cobbler/settings must be set to something other than localhost, or kickstarting features will not work.  This should be a resolvable hostname or IP for the boot server as reachable by all machines that will use it.2: For PXE to be functional, the 'next_server' field in/etc/cobbler/settings must be set to something other than 127.0.0.1, and should match the IP of the boot server on the PXE network.3: change 'disable' to 'no'in/etc/xinetd.d/tftp
4: Some network boot-loaders are missing from/var/lib/cobbler/loaders, you may run 'cobbler get-loaders' to download them, or,if you only want to handle x86/x86_64 netbooting, you may ensure that you have installed a *recent* version of the syslinux package installed and can ignore this message entirely.  Files inthis directory, should you want to support all architectures, should include pxelinux.0, menu.c32, elilo.efi, and yaboot. The 'cobbler get-loaders' command is the easiest way to resolve these requirements.5: enable and start rsyncd.service with systemctl
6: debmirror package is not installed, it will be required to manage debian deployments and repositories
7: The default password used by the sample templates for newly installed machines(default_password_crypted in/etc/cobbler/settings) is still set to 'cobbler' and should be changed,try:"openssl passwd -1 -salt 'random-phrase-here' 'your-password-here'" to generate newone8: fencing tools were not found, and are required to use the(optional) power management features. install cman or fence-agents to use them

Restart cobblerd and then run 'cobbler sync' to apply changes.

According to these check items, make changes to related check items###

sed -i 's/server: 127.0.0.1/server: 172.16.1.202/'/etc/cobbler/settings
sed -i 's/next_server: 127.0.0.1/next_server: 172.16.1.202/'/etc/cobbler/settings
sed -i 's/manage_dhcp: 0/manage_dhcp: 1/'/etc/cobbler/settings
sed -i 's/pxe_just_once: 0/pxe_just_once: 1/'/etc/cobbler/settings
sed -ri "/default_password_crypted/s#(.*: ).*#\1\"`openssl passwd -1 -salt 'oldboy' '123456'`\"#"/etc/cobbler/settings
sed -i 's#yes#no#'/etc/xinetd.d/tftp

systemctl start rsyncd
systemctl enable rsyncd
systemctl enable tftp.socket
systemctl start tftp.socket 
systemctl restart cobblerd.service

Modify dhcp template configuration file###

sed -i.ori 's#192.168.1#172.16.1#g;22d;23d'/etc/cobbler/dhcp.template

Synchronize all configurations###

Note: an error will be reported if it is not synchronized

[ root@Cobbler ~]# cobbler sync
task started:2017-11-15_101915_sync
task started(id=Sync, time=Wed Nov 1510:19:152017)
running pre-sync triggers
cleaning trees
removing:/var/lib/tftpboot/grub/images
copying bootloaders
trying hardlink /var/lib/cobbler/loaders/pxelinux.0->/var/lib/tftpboot/pxelinux.0
trying hardlink /var/lib/cobbler/loaders/menu.c32 ->/var/lib/tftpboot/menu.c32
trying hardlink /var/lib/cobbler/loaders/yaboot ->/var/lib/tftpboot/yaboot
trying hardlink /usr/share/syslinux/memdisk ->/var/lib/tftpboot/memdisk
trying hardlink /var/lib/cobbler/loaders/grub-x86.efi ->/var/lib/tftpboot/grub/grub-x86.efi
trying hardlink /var/lib/cobbler/loaders/grub-x86_64.efi ->/var/lib/tftpboot/grub/grub-x86_64.efi
copying distros to tftpboot
copying images
generating PXE configuration files
generating PXE menu structure
rendering DHCP files
generating /etc/dhcp/dhcpd.conf
rendering TFTPD files
generating /etc/xinetd.d/tftp
cleaning link caches
running post-sync triggers
running python triggers from/var/lib/cobbler/triggers/sync/post/*
running python trigger cobbler.modules.sync_post_restart_services
running: dhcpd -t -q
received on stdout: 
received on stderr: 
running: service dhcpd restart
received on stdout: 
received on stderr: Redirecting to /bin/systemctl restart dhcpd.service

running shell triggers from /var/lib/cobbler/triggers/sync/post/*
running python triggers from /var/lib/cobbler/triggers/change/*
running python trigger cobbler.modules.scm_track
running shell triggers from /var/lib/cobbler/triggers/change/*
*** TASK COMPLETE ***

cobbler use operation#

Bloggers use virtual machine operations

https://10.0.0.202/cobbler_web browser access URL
The default account password is cobbler

Import Mirror (import DVD)

Note: First, the virtual machine must ensure the following operations

According to the mirror location, mount

image.png

Because of the mnt written in the mirror location, the mirror should be mounted under mnt
[ root@Cobbler pxelinux.cfg]# mount /dev/cdrom /mnt/[root@Cobbler pxelinux.cfg]# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda3        98G  5.8G   93G   6% /
devtmpfs        902M     0  902M   0%/dev
tmpfs           912M     0  912M   0%/dev/shm
tmpfs           912M  8.7M  903M   1%/run
tmpfs           912M     0  912M   0%/sys/fs/cgroup
/dev/sda1      1014M  135M  880M  14%/boot
tmpfs           183M     0  183M   0%/run/user/0/dev/sr0        4.3G  4.3G     0100%/mnt
Check the process to see if it is importing
[ root@Cobbler ~]# ps -ef|grep rsync
root    159231009:49?00:00:00/usr/bin/rsync --daemon --no-detach
root    17237159731510:53?00:00:03 rsync -a /mnt//var/www/cobbler/ks_mirror/CentOS7.4-x86_64 --progress
root    1723817237010:53?00:00:00 rsync -a /mnt//var/www/cobbler/ks_mirror/CentOS7.4-x86_64 --progress
root    17239172381110:53?00:00:02 rsync -a /mnt//var/www/cobbler/ks_mirror/CentOS7.4-x86_64 --progress

ks file composition##

Command section###

At the beginning of install, to %pre

Packet group segment###

Start with %packages and end with %end

Script section###

Start with %post and end with %end. Relevant Linux commands and scripts executed after the system is installed

Start with %pre and end with %end. Relevant Linux commands and scripts executed before the system is installed

Kickstart file syntax check##

Download grammar checking software###

yum install pykickstart -y

Check command

[ root@CentOS7 tftpboot]# ksvalidator /var/www/html/ks_config/CentOS-7-ks.cfg 
Note: Please remember that this verification tool has its limitations. Kickstart files can be very complicated; ksvalidator guarantees that the syntax is correct and the file does not contain obsolete options.
But it cannot guarantee that the installation will be successful. It will not try to verify the Kickstart file%pre、%post and%The packages section.

Root encryption password generation##

Password: 123456

[ root@CentOS7 ~]# python -c 'import crypt; print(crypt.crypt("123456"))'
$6$02PfimLMqN53z6Io$ov2Xbjm7ZC36X2tFvqnI0HymvqMY0vI/UOCxze0L/zMX722PkDJOz/JTWwVHaksawGf/bfR0k3GCpubodKTdV0

CentOS7 ks file addition##

CentOS7 ks file content###

# Cobbler for Kickstart Configurator for CentOS 7 by yao zhang
install
url --url=$tree
text
lang en_US.UTF-8
keyboard us
zerombr
bootloader --location=mbr --driveorder=sda --append="crashkernel=auto rhgb quiet"
# Network information
$SNIPPET('network_config')
# network --bootproto=dhcp --device=eth0 --onboot=yes --noipv6 --hostname=CentOS7
timezone --utc Asia/Shanghai
authconfig --enableshadow --passalgo=sha512
rootpw  --iscrypted $default_password_crypted
clearpart --all --initlabel
part /boot --fstype xfs --size 1024
part swap --size 1024
part /--fstype xfs --size 1--grow
firstboot --disable
selinux --disabled
firewall --disabled
logging --level=info
reboot

%pre
$SNIPPET('log_ks_pre')$SNIPPET('kickstart_start')$SNIPPET('pre_install_network_config')
# Enable installation monitoring
$SNIPPET('pre_anamon')%end

%packages
@^ minimal
@ compat-libraries
@ core
@ debugging
@ development
bash-completion
chrony
dos2unix
kexec-tools
lrzsz
nmap
sysstat
telnet
tree
vim
wget
%end

%post
systemctl disable postfix.service
%end

The detailed explanation about the content of the ks file is written by me <PXE+kickstart网络安装CentOS7.4系统及过程中各种报错> explained in

cobbler automatic installation system (Centos7.X)