centos7 kickstart + liveimg メモ

build.sh

#!/bin/bash
set -ex

VM_NAME=centos7mini
VM_RAM=1024
VM_CPU=1

# VM削除 動作怪しいぞ
#virsh undefine ${VM_NAME} --remove-all-storage --delete-snapshots


# VMインストール
virt-install \
  --name ${VM_NAME} \
  --hvm \
  --virt-type kvm \
  --ram ${VM_RAM} \
  --vcpus ${VM_CPU} \
  --arch x86_64 \
  --os-type linux \
  --os-variant rhel7 \
  --boot hd \
  --disk pool=zfsimages,size=20,format=qcow2 \
  --network network=default,model=virtio \
  --network bridge=br0,model=virtio \
  --graphics none \
  --serial pty \
  --console pty \
  --location /ztank/libvirt/media/CentOS-7-x86_64-Minimal-1611.iso \
  --initrd-inject centos7.ks.cfg \
  --extra-args "inst.ks=file:/centos7.ks.cfg console=tty0 console=ttyS0,115200n8"

build_liveimg.sh

#!/bin/bash
set -ex

# chroot するディレクトリを作成
mkdir -p rootfs/

# yum リポジトリの設定ファイルをコピー
rsync /etc/yum.repos.d/CentOS* rootfs/ -Rav

# resolv.conf をコピー
cp /etc/resolv.conf rootfs/etc/resolv.conf

# 主要なパッケージをインストール
#yum -y --installroot="$PWD/rootfs/" --releasever=7 install @core kernel grub2 authconfig mdadm lvm2
yum -y --installroot="$PWD/rootfs/" --releasever=7 install @core kernel grub2 authconfig iputils

# chroot で中に入っていろいろ弄る
cp ./initialize.sh ./rootfs
chroot rootfs/ ./initialize.sh
rm ./rootfs/initialize.sh



# fast but lesser compression
GZIP="-1v" tar czvf ./rootfs.tgz --directory rootfs/ .

# default
#GZIP="-6v" tar czvf ./rootfs.tgz --directory rootfs/ .

# slow but most compress
#GZIP="-9v"" tar czvf ./rootfs.tgz --directory rootfs/ .

initialize.sh

#!/bin/bash
set -ex



# ipv6 disable
tee /etc/sysctl.d/ipv6-disable.conf <<'EOS'
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
EOS


# sshd_config
sed -i '/UseDNS /c UseDNS no' /etc/ssh/sshd_config
#sed -i '/PermitRootLogin /c PermitRootLogin without-password' /etc/ssh/sshd_config
sed -i '/AddressFamily /c AddressFamily inet' /etc/ssh/sshd_config