这篇文章主要介绍如何实现lvm磁盘快照创建与恢复，文中介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们一定要看完！
默认逻辑卷，卷组都已创建。
| 元数据文件： |
# Xen 4.6 vmServer Configuration
bios = "seabios"
builder = "hvm"
boot = "cd"
pae = 1
acpi = 1
acpi_s3 = 1
acpi_s4 = 1
apic = 1
hap = 0
viridian = "all"
rtc_timeoffset = 0
localtime = 0
xen_platform_pci = 1
on_poweroff = "destroy"
on_reboot = "restart"
on_crash = "restart"
usb = 1
usbdevice = "tablet"
soundhw = "hda"
parallel = "none"
serial = "pty"
vga = "stdvga"
opengl = 1
sdl = 0
vnc = 1
vncunused = 0
vnclisten = "0.0.0.0"
# variable parameter
name = "server_yxef445nq83m04xy"
uuid = "9a7f8d39-315f-4de8-a153-154988ded4b0"
#maxmem = 16284
memory = 1024
vcpus = 2
vcpu_avail = 8
vncdisplay = 4100
vncpasswd = "736B2Z"
vif = ["mac=00:16:3e:57:05:95,bridge=xenbr0,rate=2Mb/s", "mac=00:16:3e:b9:28:02,bridge=xenbr1"]
disk = ["phy:/dev/mapper/vg0-newlv,sdc,w","phy:/dev/mapper/vg0-server_yxef445nq83m04xy_sdb,sdb,w", "tap2:/storage/vdisk/server_yxef445nq83m04xy_sda,sda,w", "file:,sdd:cdrom,r" ] |
：sda为普通文件类型磁盘作为系统盘，sdb和sdc分别为块文件磁盘。其中sdc为自己后加的块磁盘，用于本次测试。
| 将sdc磁盘进行挂载 |
a.把sdc格式化为ext3文件系统 mkfs.ext3 /dev/sdc b. 建立挂载目录 mkdir /data/ c.把/dev/sdc这个盘挂载到/data目录下
mount /dev/sdc /data d.系统启动时自动挂载/dev/sda,编辑/etc/fstab文件
vi /etc/fstab 如： /dev/VolGroup00/LogVol00 / ext3 defaults 1 1
LABEL=/boot /boot ext3 defaults 1 2
tmpfs /dev/shm tmpfs defaults 0 0
/dev/sdc /data ext3 defaults 0 0
devpts /dev/pts devpts gid=5,mode=620 0 0
sysfs /sys sysfs defaults 0 0
proc /proc proc defaults 0 0
/dev/VolGroup00/LogVol01 swap swap defaults 0 0 |
| 创建快照： |
lvcreate -s -n snap -L 50M /dev/mapper/vg0-newlv 
|
将虚拟机关机
| 执行快照回复 |
lvconvert --merge /dev/vg0/snap 
|
重启虚拟机。vnc连接。快照恢复。
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