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reinstall.sh

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+#!/bin/bash
+
+# todo 设置各种参数，例如是否自动安装
+localtest=0
+if [ $localtest == 1 ]; then
+    vmlinuz=http://192.168.43.139/images/pxeboot/vmlinuz
+    initrd=http://192.168.43.139/images/pxeboot/initrd.img
+    squashfs=http://192.168.43.139/LiveOS/squashfs.img
+    ks=http://192.168.43.139/ks-cd.cfg
+else
+    site=$(curl -L "http://mirrorlist.centos.org/?release=7&repo=os&arch=x86_64" | head -1)
+    vmlinuz=${site}images/pxeboot/vmlinuz
+    initrd=${site}images/pxeboot/initrd.img
+    squashfs=${site}LiveOS/squashfs.img
+
+    ks=https://xxx.com/ks.cfg
+fi
+
+# 获取系统盘信息
+root_name=$(lsblk -l -o NAME,UUID,TYPE,MOUNTPOINT | tr -s ' ' | grep '/$' | cut -d ' ' -f1)
+root_uuid=$(lsblk -l -o NAME,UUID,TYPE,MOUNTPOINT | tr -s ' ' | grep '/$' | cut -d ' ' -f2)
+root_type=$(lsblk -l -o NAME,UUID,TYPE,MOUNTPOINT | tr -s ' ' | grep '/$' | cut -d ' ' -f3)
+
+# 清除之前的自定义启动条目
+sed -i '3,$d' /etc/grub.d/40_custom
+
+# 下载启动内核
+cd /
+curl -LO $vmlinuz
+curl -LO $initrd
+cd -
+
+if [ -d /sys/firmware/efi ]; then
+    action='efi'
+else
+    action='16'
+fi
+
+if [ $root_type == "lvm" ]; then
+    cat <<EOF >>/etc/grub.d/40_custom
+menuentry "reinstall" {
+    insmod lvm
+    insmod xfs
+    set root=(lvm/$root_name)
+    linux$action /vmlinuz root=live:$squashfs inst.ks=$ks
+    initrd$action /initrd.img
+    }
+EOF
+
+else
+    cat <<EOF >>/etc/grub.d/40_custom
+menuentry "reinstall" {
+    insmod xfs
+    search --no-floppy --fs-uuid --set=root $root_uuid
+    linux$action /vmlinuz root=live:$squashfs inst.ks=$ks
+    initrd$action /initrd.img
+    }
+EOF
+fi
+
+grub_cfg=$(find /boot -type f -name grub.cfg)
+grub-mkconfig -o $grub_cfg || grub2-mkconfig -o $grub_cfg
+grub-reboot reinstall || grub2-reboot reinstall
+cat $grub_cfg
+# reboot