[root@wulj ~]# virsh domblklist master-192.168.100.160 #查看虚拟机路径
目标 源
------------------------------------------------
vda /home/clsn.raw
hda -
[root@wulj ~]# virsh blockresize --path /home/clsn.raw --size 50G master-192.168.100.160 给虚拟机扩容
重新定义 '/home/clsn.raw' 块设备大小
[root@k8s-master ~]# fdisk /dev/vda #进入虚拟机
Welcome to fdisk (util-linux 2.23.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Command (m for help): p
Disk /dev/vda: 53.7 GB, 53687091200 bytes, 104857600 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 label type: dos
Disk identifier: 0x000d081d
Device Boot Start End Blocks Id System
/dev/vda1 * 2048 2099199 1048576 83 Linux
/dev/vda2 2099200 20971519 9436160 8e Linux LVM
Command (m for help): n
Command (m for help): p
Disk /dev/vda: 53.7 GB, 53687091200 bytes, 104857600 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 label type: dos
Disk identifier: 0x000d081d
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 104857599 41943040 83 Linux
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table. The new table will be used at
the next reboot or after you run partprobe(8) or kpartx(8)
Syncing disks.
[root@k8s-master ~]# lsblk #查看扩容信息
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sr0 11:0 1 1024M 0 rom
vda 252:0 0 50G 0 disk
|-vda1 252:1 0 1G 0 part /boot
`-vda2 252:2 0 9G 0 part
|-centos-root 253:0 0 8G 0 lvm /
`-centos-swap 253:1 0 1G 0 lvm [SWAP]
[root@k8s-master ~]# reboot #重启虚拟机使新增的分区生效
Connection to k8s-master closed by remote host.
Connection to k8s-master closed.
[root@wulj ~]# ssh k8s-master #登录虚拟机
Last login: Fri Mar 11 16:48:43 2022 from 192.168.100.166
[root@k8s-master ~]# lsblk #查看分区信息
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sr0 11:0 1 1024M 0 rom
vda 252:0 0 50G 0 disk
|-vda1 252:1 0 1G 0 part /boot
|-vda2 252:2 0 9G 0 part
| |-centos-root 253:0 0 8G 0 lvm /
| `-centos-swap 253:1 0 1G 0 lvm [SWAP]
`-vda3 252:3 0 40G 0 part
[root@k8s-master ~]# pvcreate /dev/vda3 #创建PV
Physical volume "/dev/vda3" successfully created. #显示successfully表示成功
[root@k8s-master ~]# vgextend centos /dev/vda3 #创建卷组
Volume group "centos" successfully extended
[root@k8s-master ~]# vgdisplay #查看卷组信息
--- Volume group ---
VG Name centos
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 4
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 2
Act PV 2
VG Size 48.99 GiB
PE Size 4.00 MiB
Total PE 12542
Alloc PE / Size 2303 / <9.00 GiB
Free PE / Size 10239 / <40.00 GiB
VG UUID 6dDo3E-2PWn-TGIW-6nri-ouuQ-7pKg-Px142m
[root@k8s-master ~]# lvextend -L +40G /dev/mapper/centos-root #提示是需要10240个扇区，实际扇区只有10239个，只能扩容39.99以下空间。
Insufficient free space: 10240 extents needed, but only 10239 available
[root@k8s-master ~]# lvextend -L +39G /dev/mapper/centos-root #使用39G扩容，且扩容成功
Size of logical volume centos/root changed from <8.00 GiB (2047 extents) to <47.00 GiB (12031 extents).
Logical volume centos/root successfully resized.
[root@k8s-master ~]# resize2fs /dev/centos/root #resize2fs 只支持调整ext2\ext3\ext4文件系统的大小
resize2fs 1.42.9 (28-Dec-2013)
resize2fs: Bad magic number in super-block while trying to open /dev/centos/root
Couldn't find valid filesystem superblock.
[root@k8s-master ~]# df -hv #查看信息没有成功
Filesystem Size Used Avail Use% Mounted on
devtmpfs 484M 0 484M 0% /dev
tmpfs 496M 0 496M 0% /dev/shm
tmpfs 496M 6.7M 489M 2% /run
tmpfs 496M 0 496M 0% /sys/fs/cgroup
/dev/mapper/centos-root 8.0G 2.1G 6.0G 26% /
/dev/vda1 1014M 137M 878M 14% /boot
tmpfs 100M 0 100M 0% /run/user/0
[root@k8s-master ~]# xfs_growfs /dev/centos/root #使用xfs文件信息成功扩容
meta-data=/dev/mapper/centos-root isize=512 agcount=4, agsize=524032 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=2096128, 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 blocks changed from 2096128 to 12319744
[root@k8s-master ~]# df -hv #扩容信息
Filesystem Size Used Avail Use% Mounted on
devtmpfs 484M 0 484M 0% /dev
tmpfs 496M 0 496M 0% /dev/shm
tmpfs 496M 6.7M 489M 2% /run
tmpfs 496M 0 496M 0% /sys/fs/cgroup
/dev/mapper/centos-root 47G 2.1G 45G 5% /
/dev/vda1 1014M 137M 878M 14% /boot
tmpfs 100M 0 100M 0% /run/user/0
[root@k8s-master ~]#
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