#!/bin/sh
# /etc/initramfs-tools/scripts/local-top/lvm-loops-setup
PREREQS=""
# Output pre-requisites
prereqs()
{
    echo "$PREREQ"
}
case "$1" in
    prereqs)
	prereqs
	exit 0
    ;;
esac
HOSTDEV=""
ROOT=""
# 提取内核启动参数
for param in $(cat /proc/cmdline); do
  case $param in
    hostdev=*)
      HOSTDEV=/dev/disk/by-uuid/${param#hostdev=}
      ;;
    root=*)
      ROOT=${param#root=}
      ;
  esac
done
# 通过传递内核启动参数hostdev来判断镜像是真机上运行，否则是在虚拟机上运行
if [ "$HOSTDEV" == "" ]; then
# 虚拟机中通过-append参数传递root=/dev/vg_system/lv_root内核启动参数
  mount -t ext4 $ROOT /root
else
# 加载必要的内核模块
  modprobe usb_storage
  modprobe sd_mod
  modprobe fuse
  modprobe loop
  # 在Ramdisk根目录中添加host挂载点
  mkdir -p /host && chmod 755 /host
  # 等待文件系统中出现移动硬盘的设备文件
  until [ -b $HOSTDEV ]
  do
    sleep 1
  done
  # 挂载保存镜像文件的分区到/host
  mount -t ntfs-3g $HOSTDEV /host
  # 设置系统镜像到循环设备
  losetup -f /host/image/debian_lvm_vg_system.img
fi

#!/bin/sh 
# /etc/initramfs-tools/scripts/local-top/lvm-loops-finalize
PREREQS=""
# Output pre-requisites
prereqs()
{
    echo "$PREREQ"
}
case "$1" in
    prereqs)
	prereqs
	exit 0
	;;
esac
HOSTDEV=""
# 提取内核启动参数
for param in $(cat /proc/cmdline); do
    case $param in
	hostdev=*)
	    HOSTDEV=/dev/disk/by-uuid/${param#hostdev=}
	    ;;
    esac
done
# 通过传递内核启动参数hostdev来判断镜像是真机上运行，否则是在虚拟机上运行
if [ ! -n "$HOSTDEV" ]; then
    # 加载必要的内核模块
    . /scripts/functions

    MNT=/host
    ROOT_MNT=${rootmnt}${MNT}

    _log_msg "Moving LVM loops host device mount point from \"${MNT}\" to \"${ROOT_MNT}\"...\n"
    mount -o remount,rw ${rootmnt} || panic "Cannot remount \"${rootmnt}\" R/W."

    [ -d ${ROOT_MNT} ] || (mkdir -p ${ROOT_MNT} && chmod 755 ${ROOT_MNT}) || panic "Cannot create \"${ROOT_MNT}\" mount point."
    mount -n -o move ${MNT} ${ROOT_MNT} || panic "Cannot move \"${MNT}\" to \"${ROOT_MNT}\"."
    log_end_msg "Done"
fi

sudo -s
LOOP_FILE=debian_lvm.img
# 创建raw格式磁盘镜像
qemu-img create -f raw ${LOOP_FILE} 5G
# --- Linux 环境下 ------
# 如果在macOS下可以把这一步放在启动虚拟机后
LOOP_DEV=`losetup -f`
LVM_VG=vg_system
LVM_LV_ROOT=lv_root
# 设置循环设备
losetup ${LOOP_DEV} ${LOOP_FILE}
# 初始化物理卷
pvcreate -v ${LOOP_DEV}
# 创建卷组
vgcreate -v ${LVM_VG} ${LOOP_DEV}
# 创建一个逻辑卷
lvcreate -v -l 100%FREE -n ${LVM_LV_ROOT} ${LVM_VG}
#------------------------
wget http://mirrors.163.com/debian-cd/9.4.0/amd64/iso-cd/debian-9.4.0-amd64-netinst.iso
# 内核Ramdisk的根目录挂载脚本
cat > bootup <<EOF
#!/bin/sh
PREREQ=""
prereqs()
{
   echo "$PREREQ"
}

case $1 in
prereqs)
    prereqs
    exit 0
;;
esac
mount -t ext4 /dev/vg_system/lv_root /root
EOF
chmod +x bootup
# 为了提高虚拟机的性能需要添加参数-M accel=hvf(macOS) 或 accel=kvm(Linux)
# 如果macOS下的accel=hvf无效，可以自己编译qemu
qemu-system-x86_64 -m 512 -M accel=hvf -boot order=d -hda debian_lvm.img -cdrom debian-9.4.0-amd64-netinst.iso
# 当安装进度到Partition disks，按2次ESC返回Debian installer menu，选择Excute a shell，进入Busybox ash shell
DEV=/dev/sda
LVM_VG=vg_system
LVM_LV_ROOT=lv_root
pvcreate -v ${DEV}
vgcreate -v ${LVM_VG} ${DEV}
lvcreate -v -l 100%FREE -n ${LVM_LV_ROOT} ${LVM_VG}
# 当安装进度到Install the GRUB boot loader时，按2次ESC中断安装的进程，进入Debian installer main menu，选择Execute a shell，进入busybox ash shell
mount -t ext4 /dev/vg_system/lv_root /mnt
mount --bind /dev/pts /mnt/dev/pts
mount --bind /dev /mnt/dev
mount --bind /proc /mnt/proc
mount --bind /sys /mnt/sys
chroot /mnt /bin/bash
scp wing@10.0.2.2:bootup /etc/initramfs-tools/scripts/local-top/
mkinitramfs -o /initrd.new.img
scp /qemu.initrd.img wing@10.0.2.2:
scp /vmlinuz wing@10.0.2.2:
exit
poweroff
qemu-system-x86_64 -m 512 -M accel=hvf -hda debian_lvm.img -kernel vmlinuz -initrd qemu.initrd.img

mkdir initrd
cd initrd
cpio -ivmd  < ../initrd.img
find . | cpio -o -H newc | gzip > ../initrd.new.img 

sudo losetup -f debian.img
sudo pvresize /dev/loop0
sudo lvextend -l 100%FREE /dev/vg_system/lv_root
Sudo resize2fs /dev/vg_system/lv_root

#!/bin/sh
# /etc/initramfs-tools/scripts/local-top/lvm-loops-setup
PREREQS=""
# Output pre-requisites
prereqs()
{
    echo "$PREREQ"
}
case "$1" in
    prereqs)
	prereqs
	exit 0
    ;;
esac
HOSTDEV=""
ROOT=""
# 提取内核启动参数
for param in $(cat /proc/cmdline); do
  case $param in
    hostdev=*)
      HOSTDEV=/dev/disk/by-uuid/${param#hostdev=}
      ;;
    root=*)
      ROOT=${param#root=}
      ;
  esac
done
# 通过传递内核启动参数hostdev来判断镜像是真机上运行，否则是在虚拟机上运行
if [ "$HOSTDEV" == "" ]; then
# 虚拟机中通过-append参数传递root=/dev/vg_system/lv_root内核启动参数
  mount -t ext4 $ROOT /root
else
# 加载必要的内核模块
  modprobe usb_storage
  modprobe sd_mod
  modprobe fuse
  modprobe loop
  # 在Ramdisk根目录中添加host挂载点
  mkdir -p /host && chmod 755 /host
  # 等待文件系统中出现移动硬盘的设备文件
  until [ -b $HOSTDEV ]
  do
    sleep 1
  done
  # 挂载保存镜像文件的分区到/host
  mount -t ntfs-3g $HOSTDEV /host
  # 设置系统镜像到循环设备
  LOOPDEV=`losetup -f`
  losetup -f /host/image/debian.img
  mount -t ext4 ${LOOPDEV}p3 /root
fi

#!/bin/sh 
# /etc/initramfs-tools/scripts/local-top/lvm-loops-finalize
PREREQS=""
# Output pre-requisites
prereqs()
{
    echo "$PREREQ"
}
case "$1" in
    prereqs)
	prereqs
	exit 0
	;;
esac
HOSTDEV=""
# 提取内核启动参数
for param in $(cat /proc/cmdline); do
    case $param in
	hostdev=*)
	    HOSTDEV=/dev/disk/by-uuid/${param#hostdev=}
	    ;;
    esac
done
# 通过传递内核启动参数hostdev来判断镜像是真机上运行，否则是在虚拟机上运行
if [ ! -n "$HOSTDEV" ]; then
    # 加载必要的内核模块
    . /scripts/functions

    MNT=/host
    ROOT_MNT=${rootmnt}${MNT}

    _log_msg "Moving LVM loops host device mount point from \"${MNT}\" to \"${ROOT_MNT}\"...\n"
    mount -o remount,rw ${rootmnt} || panic "Cannot remount \"${rootmnt}\" R/W."

    [ -d ${ROOT_MNT} ] || (mkdir -p ${ROOT_MNT} && chmod 755 ${ROOT_MNT}) || panic "Cannot create \"${ROOT_MNT}\" mount point."
    mount -n -o move ${MNT} ${ROOT_MNT} || panic "Cannot move \"${MNT}\" to \"${ROOT_MNT}\"."
    log_end_msg "Done"
fi

qemu-img create -f raw debian.img 5g
sudo -s
sudo losetup -f debian.img 
# 分区1 grub_bios 分区2 ESP 分区3 ext4
sgdisk --clear -n 0::+1m -t 1:ef02 -n 0::+100m -t 2:ef00 -n 0:: -t 3:8300 -p /dev/loop0
sudo mkfs.fat -F32 /dev/loop0p2
sudo mkfs.ext4 /dev/loop0p3
sudo mount /dev/loop0p3 /mnt
sudo mkdir -p /mnt/boot
sudo mount /dev/loop0p2 /mnt/boot
# grub2 的安装过程也可以放到chroot之后
# grub安装到MBR
sudo grub-install --target=i386-pc --recheck --boot-directory=/mnt/boot /dev/loop0
# grub安装到ESP,特别注意--removable参数，安装到移动设备上一定要用这个参数
sudo grub-install --target=x86_64-efi --efi-directory=/mnt/boot --boot-directory=/mnt/boot 
sudo apt-get install debootstrap
# 安装base system到/mnt
sudo debootstrap --verbose --components=main,contrib,non-free \
	    --include=linux-image-amd64,grub-pc-bin,grub-efi-amd64,ssh,vim \
	    --exclude=nano \
	    --arch amd64 stable /mnt http://mirrors.ustc.edu.cn/debian

sudo mount --bind /dev/pts /mnt/dev/pts
sudo mount --bind /dev /mnt/dev
sudo mount --bind /proc /mnt/proc
sudo mount --bind /sys /mnt/sys
sudo chroot /mnt bash
# 如果上面步骤中已经安装grub，这里就不需要重复安装了
# grub安装到MBR
grub-install --target=i386-pc --recheck --boot-directory=/boot /dev/loop0
# grub安装到ESP,特别注意--removable参数，安装到移动设备上一定要用这个参数
grub-install --target=x86_64-efi --efi-directory=/boot --boot-directory=/boot 
# 生成启动菜单
grub-mkconfig -o /boot/grub/grub.cfg
passwd root
# Qemu中使用UEFI启动，需要添加以下自动启动脚本
echo "\EFI\debian\grubx64.efi" > /boot/startup.nsh
# 添加fstab
blkid | awk '$1 ~ /loop0p2/{print $2" /boot vfat defaults,noatime 0 2"} $1 ~ /loop0p3/{print $2" / ext4 defaults 0 1"}' > /etc/fstab
# 添加网络配置文件
cat > /etc/network/interfaces <<EOF
auto lo
iface lo inet loopback

allow-hotplug ens3
iface ens3 inet dhcp
EOF
# 更新内核Ramdisk
update-initramfs -uvt
exit
sudo umount /mnt/dev
sudo umount /mnt/dev/pts
sudo umount /mnt/proc
sudo umount /mnt/sys
sudo umount /mnt/boot
sudo umount /mnt
sudo losetup -d /dev/loop0

qemu-img resize -f raw debian.img +1G
sudo losetup -f debian.img
sudo gparted /dev/loop0