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|
创建磁盘： qemu-img create -f qcow2
/data/centos73
_2.qcow25G
关闭虚拟机： virsh destroy centos73
编辑配置文件： virsh edit centos73
复制增加如下：注意是vdb，qcow2
<disk
type
=
'file'
device=
'disk'
>
<driver name=
'qemu'
type
=
'qcow2'
/>
<
source
file
=
'/data/kvm/centos733.qcow2'
/>
<target dev=
'vda'
bus=
'virtio'
/>
<address
type
=
'pci'
domain=
'0x0000'
bus=
'0x00'
slot=
'0x06'
function
=
'0x0'
/>
<
/disk
>
<disktype=
'file'
device=
'disk'
>
<driver name=
'qemu'
type
=
'qcow2'
/>
<
source
file
=
'/data/kvm/centos733_2.qcow2'
/>
<target dev=
'vdb'
bus=
'virtio'
/>
<address
type
=
'pci'
domain=
'0x0000'
bus=
'0x00'
slot=
'0x07'
function
=
'0x0'
/>(删除，开启domain重新生成)
<
/disk
>
[root@localhost~]
# fdisk -l
Disk
/dev/vda
: 14.0 GB, 13958643712 bytes, 27262976 sectors
Units =sectors of 1 * 512 = 512 bytes
Sector size(logical
/physical
): 512 bytes / 512 bytes
I
/O
size(minimum
/optimal
): 512 bytes / 512 bytes
Disk labeltype: dos
Diskidentifier: 0x000b21a9
Device Boot Start End Blocks Id System
/dev/vda1
* 2048 2099199 1048576 83 Linux
/dev/vda2
2099200 20971519 9436160 8e Linux LVM
/dev/vda3
20971520 27262975 3145728 8e Linux LVM
Disk
/dev/vdb
: 5368 MB, 5368709120 bytes, 10485760 sectors
Units =sectors of 1 * 512 = 512 bytes
Sector size(logical
/physical
): 512 bytes / 512 bytes
I
/O
size(minimum
/optimal
): 512 bytes / 512 bytes
Disk
/dev/mapper/cl-root
: 11.8 GB, 11802771456 bytes, 23052288 sectors
Units =sectors of 1 * 512 = 512 bytes
Sector size(logical
/physical
): 512 bytes / 512 bytes
I
/O
size(minimum
/optimal
): 512 bytes / 512 bytes
Disk
/dev/mapper/cl-swap
: 1073 MB, 1073741824 bytes, 2097152 sectors
Units =sectors of 1 * 512 = 512 bytes
Sector size(logical
/physical
): 512 bytes / 512 bytes
I
/O
size(minimum
/optimal
): 512 bytes / 512 bytes
[root@localhost~]
# fdisk /dev/vdb
Welcome tofdisk (util-linux 2.23.2).
Changeswill remain
in
memory only,
until
you decide to write them.
Be carefulbefore using the write
command
.
Device doesnot contain a recognized partition table
Building anew DOS disklabel with disk identifier 0xe3fb71dc.
Command (mfor help): n
Partitiontype:
p primary (0 primary, 0 extended, 4
free
)
e extended
Select(default p): p
Partitionnumber (1-4, default 1):
Firstsector (2048-10485759, default 2048):
Usingdefault value 2048
Lastsector, +sectors or +size{K,M,G} (2048-10485759, default 10485759):
Usingdefault value 10485759
Partition 1of
type
Linux and of size 5 GiB is
set
Command (mfor help): p
Disk
/dev/vdb
: 5368 MB, 5368709120 bytes, 10485760 sectors
Units =sectors of 1 * 512 = 512 bytes
Sector size(logical
/physical
): 512 bytes / 512 bytes
I
/O
size(minimum
/optimal
): 512 bytes / 512 bytes
Disk labeltype: dos
Diskidentifier: 0xe3fb71dc
Device Boot Start End Blocks Id System
/dev/vdb1
2048 10485759 5241856 83 Linux
Command (mfor help): t
Selectedpartition 1
Hex code(
type
L to list all codes): 8e
Changedtype of partition
'Linux'
to
'Linux LVM'
Command (mfor help): w
Thepartition table has been altered!
Callingioctl() to re-
read
partition table.
Syncingdisks.
[root@localhost~]
# fdisk -l
Disk
/dev/vda
: 14.0 GB, 13958643712 bytes, 27262976 sectors
Units =sectors of 1 * 512 = 512 bytes
Sector size(logical
/physical
): 512 bytes / 512 bytes
I
/O
size(minimum
/optimal
): 512 bytes / 512 bytes
Disk labeltype: dos
Diskidentifier: 0x000b21a9
Device Boot Start End Blocks Id System
/dev/vda1
* 2048 2099199 1048576 83 Linux
/dev/vda2
2099200 20971519 9436160 8e Linux LVM
/dev/vda3
20971520 27262975 3145728 8e Linux LVM
Disk
/dev/vdb
: 5368 MB, 5368709120 bytes, 10485760 sectors
Units =sectors of 1 * 512 = 512 bytes
Sector size(logical
/physical
): 512 bytes / 512 bytes
I
/O
size(minimum
/optimal
): 512 bytes / 512 bytes
Disk labeltype: dos
Diskidentifier: 0xe3fb71dc
Device Boot Start End Blocks Id System
/dev/vdb1
2048 10485759 5241856 8e Linux LVM
Disk
/dev/mapper/cl-root
: 11.8 GB, 11802771456 bytes, 23052288 sectors
Units =sectors of 1 * 512 = 512 bytes
Sector size(logical
/physical
): 512 bytes / 512 bytes
I
/O
size(minimum
/optimal
): 512 bytes / 512 bytes
Disk
/dev/mapper/cl-swap
: 1073 MB, 1073741824 bytes, 2097152 sectors
Units =sectors of 1 * 512 = 512 bytes
Sector size(logical
/physical
): 512 bytes / 512 bytes
I
/O
size(minimum
/optimal
): 512 bytes / 512 bytes
[root@localhost~]
# pvs
PV VG Fmt Attr PSize PFree
/dev/vda2
cl lvm2 a-- 9.00g 0
/dev/vda3
cl lvm2 a-- 3.00g 0
[root@localhost~]
# pvcreate
anaconda-ks.cfg .bash_logout .bashrc .tcshrc
.bash_history .bash_profile .cshrc
[root@localhost~]
# pvcreate /dev/vdb1
Physical volume
"/dev/vdb1"
successfully created.
[root@localhost~]
# vgex
vgexport vgextend
[root@localhost~]
# vgextend
anaconda-ks.cfg .bash_logout .bashrc .tcshrc
.bash_history .bash_profile .cshrc
[root@localhost~]
# vgextend cl /dev/vdb1
Volume group
"cl"
successfullyextended
[root@localhost~]
# vgdisplay
--- Volume group ---
VG Name cl
System ID
Format lvm2
Metadata Areas 3
Metadata Sequence No 6
VG Access
read
/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 3
Act PV 3
VG Size 16.99 GiB
PE Size 4.00 MiB
Total PE 4349
Alloc PE / Size 3070 / 11.99 GiB
Free PE / Size 1279 / 5.00 GiB
VG UUID Veeoup-1E2G-3E5C-a794-CBrH-C1iY-qrSJzM
[root@localhost~]
# lvdisplay
--- Logical volume ---
LV Path
/dev/cl/swap
LV Name swap
VG Name cl
LV UUID 4jfTAH-1nQp-XfCX-XVOs-qXwj-REuS-qaSw3Y
LV Write Access
read
/write
LV Creation host,
time
localhost.localdomain,2017-08-21 00:13:02 +0800
LV Status available
# open 2
LV Size 1.00 GiB
Current LE 256
Segments 1
Allocation inherit
Read ahead sectors auto
- currently
set
to 8192
Block device 253:1
--- Logical volume ---
LV Path
/dev/cl/root
LV Name root
VG Name cl
LV UUID 7fM2Qm-YRZc-7iG3-OIej-q5jQ-5NnA-Zdnpmv
LV Write Access
read
/write
LV Creation host,
time
localhost.localdomain,2017-08-21 00:13:03 +0800
LV Status available
# open 1
LV Size 10.99 GiB
Current LE 2814
Segments 2
Allocation inherit
Read ahead sectors auto
- currently
set
to 8192
Block device 253:0
[root@localhost~]
# lvextend
anaconda-ks.cfg .bash_logout .bashrc .tcshrc
.bash_history .bash_profile .cshrc
[root@localhost~]
# lvextend /dev/cl/root /dev/vdb1
Size of logical volume cl
/root
changed from10.99 GiB (2814 extents) to 15.99 GiB (4093 extents).
Logical volume cl
/root
successfully resized.
[root@localhost ~]
# resize2fs /dev/cl/root
resize2fs 1.42.9 (28-Dec-2013)
resize2fs: Bad magic number
in
super-block
while
trying to
open
/dev/cl/root
Couldn't
find
valid filesystem superblock.
[root@localhost~]
# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/cl-root
11G 1.1G 10G 10% /
devtmpfs 486M 0 486M 0%
/dev
tmpfs 497M 0 497M 0%
/dev/shm
tmpfs 497M 6.6M 490M 2%
/run
tmpfs 497M 0 497M 0%
/sys/fs/cgroup
/dev/vda1
1014M 139M 876M 14%
/boot
tmpfs 100M 0 100M 0%
/run/user/0
[root@localhost~]
# resize2fs /dev/mapper/cl-root
resize2fs1.42.9 (28-Dec-2013)
resize2fs:Bad magic number
in
super-block
while
trying to
open
/dev/mapper/cl-root
Couldn'tfind valid filesystem superblock.
[root@localhost~]
# xfs_growfs /dev/mapper/cl-root
meta-data=
/dev/mapper/cl-root
isize=512 agcount=6, agsize=524032 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=2881536, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal bsize=4096 blocks=2560, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime=none extsz=4096 blocks=0, rtextents=0
data blockschanged from 2881536 to 4191232
[root@localhost~]
# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/cl-root
16G 1.1G 15G 7% /
devtmpfs 486M 0 486M 0%
/dev
tmpfs 497M 0 497M 0%
/dev/shm
tmpfs 497M 6.6M 490M 2%
/run
tmpfs 497M 0 497M 0%
/sys/fs/cgroup
/dev/vda1
1014M 139M 876M 14%
/boot
tmpfs 100M 0 100M 0%
/run/user/0
当然也可以按照上面的思路把
/dev/vdb
加入到 lvm里面去，测试成功
|
本文转自 喵来个鱼 51CTO博客，原文链接：http://blog.51cto.com/m51cto/1958519，如需转载请自行联系原作者
