centos8 已经发布了GA版本，迫不及待的想尝鲜了，然后现实总是那么残酷，一直安装失败，具体安装步骤如下：
假设cobbler已配置完成。
1、下载centos8 iso镜像
wget http://mirrors.aliyun.com/centos/8.0.1905/isos/x86_64/CentOS-8-x86_64-1905-dvd1.iso
2、挂载
$ mount -o loop CentOS-8-x86_64-1905-dvd1.iso /mnt/
$ cd /mnt/
$ cp -r * /iso/centos8.0/
$ cd /iso/centos8.0/
AppStream BaseOS EFI images isolinux media.repo TRANS.TBL
3、配置kickstart文件
$ cat /var/lib/cobbler/kickstarts/centos8.0.ks
#version=RHEL8
# System authorization information
auth --enableshadow --passalgo=sha512
# System bootloader configuration
bootloader --location=mbr --boot-drive=sda
# Partition clearing information
clearpart --all --initlabel
# Use text mode install
#text
graphical
# Firewall configuration
firewall --disabled
# Run the Setup Agent on first boot
firstboot --disable
ignoredisk --only-use=sda
# System keyboard
keyboard --vckeymap=us --xlayouts='us'
# System language
lang en_US.UTF-8
# Use network installation
url --url=$tree
# If any cobbler repo definitions were referenced in the kickstart profile, include them here.
$yum_repo_stanza
# Network information
$SNIPPET('network_config')
# Reboot after installation
reboot
#Root password
rootpw --iscrypted $default_password_crypted
# SELinux configuration
selinux --disabled
# Do not configure the X Window System
skipx
# System timezone
timezone --utc Asia/Shanghai
# Install OS instead of upgrade
install
# Clear the Master Boot Record
zerombr
# Allow anaconda to partition the system as needed
#autopart
part /boot --fstype="xfs" --ondisk=sda --size=500
part swap --fstype="swap" --ondisk=sda --size=2048
part / --fstype="xfs" --ondisk=sda --size=1 --grow
part biosboot --fstype="BIOS Boot" --ondisk=sda --size=2
%pre
$SNIPPET('log_ks_pre')
$SNIPPET('kickstart_start')
$SNIPPET('pre_install_network_config')
# Enable installation monitoring
$SNIPPET('pre_anamon')
%end
%packages
@^minimal-environment
@standard
%end
4、cobbler 导入
$ cobbler import --name=centos8.0 --path=/iso/centos8.0 --kickstart=/var/lib/cobbler/kickstarts/centos8.0.ks --arch=x86_64
发现报错，报错如下：
No signature matched
$ cobbler import --name=centos8.0 --path=/iso/centos8.0 --kickstart=/var/lib/cobbler/kickstarts/centos8.0.ks task started: 2019-10-16_074659_import task started (id=Media import, time=Wed Oct 16 07:46:59 2019) No signature matched in /var/www/cobbler/ks_mirror/centos8.0 !!! TASK FAILED !!!
解决：
$ cobbler signature update task started: 2019-10-16_074829_sigupdate task started (id=Updating Signatures, time=Wed Oct 16 07:48:29 2019) Successfully got file from https://cobbler.github.io/signatures/2.8.x/latest.json *** TASK COMPLETE ***
5、装机
然后装机过程中报错了，截图未报错，报错信息是：报错的界面是配置"Installation Source"，报错为:"Error setting up base repository"，反复测试依然有问题，不知道怎么设置，没办法，只能从iso那块下手了，检查iso文件内容。
6、iso配置
iso中有AppStream和BaseOS两个目录，目录中都有Packages目录和repodata目录，将BaseOS中的 BaseOS/repodata/586a8e96ad3b73414e5c6ae94a5e4f128a087fcb0ca9837674573a8d6cac4a9c-comps-BaseOS.x86_64.xml 拷贝到 BaseOS 同级目录下，并将 AppStream/Packages 下的auth*包文件全部拷贝到BaseOS/Packages 下，然后使用 createrepo -g 586a8e96ad3b73414e5c6ae94a5e4f128a087fcb0ca9837674573a8d6cac4a9c-comps-BaseOS.x86_64.xml . 创建repodata目录。
$ cd /iso/centos8.0/
$ ls
AppStream BaseOS EFI images isolinux media.repo TRANS.TBL
$ cp AppStream/Packages/auth* BaseOS/Packages/
$ cp BaseOS/repodata/586a8e96ad3b73414e5c6ae94a5e4f128a087fcb0ca9837674573a8d6cac4a9c-comps-BaseOS.x86_64.xml ./
$ ls
586a8e96ad3b73414e5c6ae94a5e4f128a087fcb0ca9837674573a8d6cac4a9c-comps-BaseOS.x86_64.xml AppStream BaseOS EFI images isolinux media.repo TRANS.TBL
$ createrepo -g 586a8e96ad3b73414e5c6ae94a5e4f128a087fcb0ca9837674573a8d6cac4a9c-comps-BaseOS.x86_64.xml .
Spawning worker 0 with 167 pkgs
Spawning worker 39 with 166 pkgs
Workers Finished
Saving Primary metadata
Saving file lists metadata
Saving other metadata
Generating sqlite DBs
Sqlite DBs complete
$ rm -rf AppStream/repodata BaseOS/repodata
重新使用cobbler import，再使用最小化安装。
当然我配置的可能哪里出了问题，导致出现了"Error setting up base repository"报错，如果哪位大神解决了这个问题，欢迎评论区告知一声。