centos7虚拟机扩容（CentOS虚拟机硬盘扩容到）

[root@localhost ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 200G 0 disk ├─sda1 8:1 0 1G 0 part /boot └─sda2 8:2 0 99G 0 part ├─centos-root 253:0 0 50G 0 LVM / ├─centos-swap 253:1 0 3.9G 0 lvm [SWAP] └─centos-home 253:2 0 45.1G 0 lvm /home sr0 11:0 1 4.4G 0 rom

fdisk /dev/sda

[root@localhost ~]# fdisk /dev/sda 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): n Partition type: p primary (2 primary, 0 extended, 2 free) e extended Select (default p): p Partition number (3,4, default 3): 3 First sector (209715200-419430399, default 209715200): Using default value 209715200 Last sector, sectors or size{K,M,G} (209715200-419430399, default 419430399): Using default value 419430399 Partition 3 of type Linux and of size 100 GiB is set 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@localhost ~]#

pvcreate /dev/sda3

[root@localhost ~]# pvcreate /dev/sda3 Physical volume "/dev/sda3" successfully created. [root@localhost ~]# [root@localhost ~]# [root@localhost ~]# vgs VG #PV #LV #SN Attr VSize VFree centos 1 3 0 wz--n- <99.00g 4.00m [root@localhost ~]#

[root@localhost ~]# pvdisplay --- Physical volume --- PV Name /dev/sda2 VG Name centos PV Size <99.00 GiB / not usable 3.00 MiB Allocatable yes PE Size 4.00 MiB Total PE 25343 Free PE 1 Allocated PE 25342 PV UUID iUNVfi-Xcl5-8y1l-d7Vc-88md-zghN-N4eMCO "/dev/sda3" is a new physical volume of "100.00 GiB" --- NEW Physical volume --- PV Name /dev/sda3 VG Name PV Size 100.00 GiB Allocatable NO PE Size 0 Total PE 0 Free PE 0 Allocated PE 0 PV UUID 0RU9uN-daWc-AjwY-65yn-4HJl-Jayp-elokTB [root@localhost ~]# vgdisplay --- Volume group --- VG Name centos System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 4 VG Access read/write VG Status resizable MAX LV 0 Cur LV 3 Open LV 3 Max PV 0 Cur PV 1 Act PV 1 VG Size <99.00 GiB PE Size 4.00 MiB Total PE 25343 Alloc PE / Size 25342 / 98.99 GiB Free PE / Size 1 / 4.00 MiB VG UUID N97Czd-TZPg-zvmL-UoTg-rz3Y-UXyX-lW8KyV

vgextend centos /dev/sda3

[root@localhost ~]# vgextend centos /dev/sda3 Volume group "centos" successfully extended [root@localhost ~]# [root@localhost ~]# [root@localhost ~]# [root@localhost ~]# vgs VG #PV #LV #SN Attr VSize VFree centos 2 3 0 wz--n- 198.99g 100.00g

lvdisplay

[root@localhost ~]# lvdisplay --- Logical volume --- LV Path /dev/centos/swap LV Name swap VG Name centos LV UUID psDv8G-DCud-1oFh-dejc-AV9D-she3-1CZkaF LV Write Access read/write LV Creation host, time localhost, 2022-08-01 09:41:10 0800 LV Status available # open 2 LV Size <3.88 GiB Current LE 992 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 8192 Block device 253:1 --- Logical volume --- LV Path /dev/centos/home LV Name home VG Name centos LV UUID VJeQaM-DRC9-C8t0-XPle-zv37-hW3U-2QGVYT LV Write Access read/write LV Creation host, time localhost, 2022-08-01 09:41:10 0800 LV Status available # open 1 LV Size <45.12 GiB Current LE 11550 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 8192 Block device 253:2 --- Logical volume --- LV Path /dev/centos/root LV Name root VG Name centos LV UUID jwW2hv-U7sF-heJH-g3l6-TuyV-2zn5-mbPhTC LV Write Access read/write LV Creation host, time localhost, 2022-08-01 09:41:10 0800 LV Status available # open 1 LV Size 50.00 GiB Current LE 12800 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 8192 Block device 253:0

lvextend -L 99G /dev/centos/root #扩展/root所在的lv，增加99G xfs_growfs /dev/centos/root #扩展/root文件系统

[root@localhost ~]# lvextend -L 99G /dev/centos/root Size of logical volume centos/root changed from 50.00 GiB (12800 extents) to 149.00 GiB (38144 extents). Logical volume centos/root successfully resized. [root@localhost ~]# [root@localhost ~]# [root@localhost ~]# xfs_growfs /dev/centos/root meta-data=/dev/mapper/centos-root isize=512 agcount=4, agsize=3276800 blks = sectsz=512 attr=2, projid32bit=1 = crc=1 finobt=0 spinodes=0 data = bsize=4096 blocks=13107200, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 ftype=1 log =internal bsize=4096 blocks=6400, version=2 = sectsz=512 sunit=0 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 data blocks changed from 13107200 to 39059456 [root@localhost ~]#