T1.Micro 轉 T2.Micro 流程
前置準備（此步驟為AWS Console作業）
0.T1.Micro 要預先裝好GRUB 沒裝後面也不用做了
1.主機 開啟一台作業用EC2 命名EC2-Working
2.T1.Micro 建立Snapshot -->建立 Volume (T1.Micro.Source)
3.建立目的地Volume (T2.Micro.Dest)
4.將T1.Micro.Source 掛載到EC2-Working的 /dev/sdm
5.將T2.Micro.Dest 掛載到EC2-Working的 /dev/sdo
T2.Micro.Dest 處理作業（以下作業皆使用root權限）
1.建立Partition
#parted /dev/xvdo --script 'mklabel msdos mkpart primary 1M -1s print quit'
2.Partion偵測
#partprobe /dev/xvdo
3.udev偵測
#udevadm settle
T1.Micro.Source 處理作業
1.檔案系統檢查
#e2fsck -f /dev/xvdm
2.Resize檔案系統
#resize2fs -M /dev/xvdm
3.記下輸出的數值
- Output from resize command:
Resizing the filesystem on /dev/xvdm to 1391485 (4k) blocks.
The filesystem on /dev/xvdm is now 1391485 blocks long.
將T1.Micro.Source複製到T2.Micro.Dest
1.Disk Dump
#dd if=/dev/xvdm of=/dev/xvdo1 bs=4K count=1391485
輸入剛剛查出的數值
2.完成後Resize
#resize2fs /dev/xvdo1
Grub 安裝前置準備
# mount /dev/xvdo1 /mnt
# cp -a /dev/xvdo /dev/xvdo1 /mnt/dev/
# rm -f /mnt/boot/grub/*stage*
# cp /mnt/usr/*/grub/*/*stage* /mnt/boot/grub/
# rm -f /mnt/boot/grub/device.map
Grub 安裝
# cat <
> device (hd0) /dev/xvdo
> root (hd0,0)
> setup (hd0)
> EOF
Probing devices to guess BIOS drives. This may take a long time.
GNU GRUB version 0.97 (640K lower / 3072K upper memory)
[ Minimal BASH-like line editing is supported. For the first word, TAB
lists possible command completions. Anywhere else TAB lists the possible
completions of a device/filename.]
grub> device (hd0) /dev/xvdo
grub> root (hd0,0)
Filesystem type is ext2fs, partition type 0x83
grub> setup (hd0)
Checking if "/boot/grub/stage1" exists... yes
Checking if "/boot/grub/stage2" exists... yes
Checking if "/boot/grub/e2fs_stage1_5" exists... yes
Running "embed /boot/grub/e2fs_stage1_5 (hd0)"... 31 sectors are embedded.
succeeded
Running "install /boot/grub/stage1 (hd0) (hd0)1+31 p (hd0,0)/boot/grub/stage2 /boot/grub/grub.conf"... succeeded
Done.
刪除Temp Device
# rm -f /mnt/dev/xvdo /mnt/dev/xvdo1
Grub設定更新
＃vi /mnt/boot/grub/menu.lst
下列內容要修改
root (hd0) 改成 root (hd0,0)
console=* 改成 console=ttyS0
在kernel 參數後面追加 xen_pv_hvm=enable
example:
# created by imagebuilder
default=0
timeout=1
hiddenmenu
title Amazon Linux 2014.03 (3.10.42-52.145.amzn1.x86_64)
root (hd0,0)
kernel /boot/vmlinuz-3.10.42-52.145.amzn1.x86_64 root=LABEL=/ console=ttyS0 LANG=ja_JP.UTF-8 KEYTABLE=us xen_pv_hvm=enable
initrd /boot/initramfs-3.10.42-52.145.amzn1.x86_64.img
更新檔案系統表
＃vi /mnt/etc/fstab
若沒有其他設定要追加可以不做修改
修改檔案系統標簽
# e2label /dev/xvdo1 /
# sync
# umount /mnt
檔案系統掛載
1.新增一T2.Micro Instance
2.待開機完成後，關機並且將原來的 Root EBS detach（可順便把該volume刪除）
3.將T2.Micro.Dest 掛載到 /dev/xvda
4.開機，登入驗證
reference:
1.https://forums.aws.amazon.com/thread.jspa?messageID=553638
2.http://www.agilegroup.co.jp/technote/t1micro-to-t2micro-migration.html
