How to create and restore lvm disk Snapshot
This article mainly introduces how to achieve lvm disk snapshot creation and recovery, the article is very detailed, has a certain reference value, interested friends must read it!
Default logical volumes, volume groups have been created.
Metadata file: # Xen 4.6vmServer 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 is a normal file type disk as a system disk, sdb and sdc are block file disks respectively. Sdc is the block disk added by itself, which is used in this test.
Mount the sdc disk
a. Format sdc into an ext3 file system
Mkfs.ext3 / dev/sdc
b. Set up a mount directory
Mkdir / data/
c. Mount the disk / dev/sdc to the / data directory
Mount / dev/sdc / data
d. Automatically mount / dev/sda and edit / etc/fstab file when the system starts
Vi / etc/fstab
Such as:
/ 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 00
Create a snapshot:
Lvcreate-s-n snap-L 50m / dev/mapper/vg0-newlv
Turn off the virtual machine
Perform a snapshot reply
Lvconvert-merge / dev/vg0/snap
Restart the virtual machine. Vnc connection. Snapshot restore.
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