centos7.9扩展已有分区空间
新增50G硬盘
分区
fdisk /dev/sdb
Command (m for help): p #打印分区表Disk /dev/sdb: 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: 0x8b654c5bDevice Boot Start End Blocks Id SystemCommand (m for help): m
Command actiona toggle a bootable flagb edit bsd disklabelc toggle the dos compatibility flagd delete a partitiong create a new empty GPT partition tableG create an IRIX (SGI) partition tablel list known partition typesm print this menun add a new partitiono create a new empty DOS partition tablep print the partition tableq quit without saving changess create a new empty Sun disklabelt change a partition\'s system idu change display/entry unitsv verify the partition tablew write table to disk and exitx extra functionality (experts only)
Command (m for help): n #新建分区
Partition type:p primary (0 primary, 0 extended, 4 free)e extended
Select (default p): p
Partition number (1-4, default 1): 1
First sector (2048-104857599, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-104857599, default 104857599):
Using default value 104857599
Partition 1 of type Linux and of size 50 GiB is setCommand (m for help): t #修改分区类型
Selected partition 1
Hex code (type L to list all codes): L0 Empty 24 NEC DOS 81 Minix / old Lin bf Solaris1 FAT12 27 Hidden NTFS Win 82 Linux swap / So c1 DRDOS/sec (FAT-2 XENIX root 39 Plan 9 83 Linux c4 DRDOS/sec (FAT-3 XENIX usr 3c PartitionMagic 84 OS/2 hidden C: c6 DRDOS/sec (FAT-4 FAT16 <32M 40 Venix 80286 85 Linux extended c7 Syrinx5 Extended 41 PPC PReP Boot 86 NTFS volume set da Non-FS data6 FAT16 42 SFS 87 NTFS volume set db CP/M / CTOS / .7 HPFS/NTFS/exFAT 4d QNX4.x 88 Linux plaintext de Dell Utility8 AIX 4e QNX4.x 2nd part 8e Linux LVM df BootIt9 AIX bootable 4f QNX4.x 3rd part 93 Amoeba e1 DOS accessa OS/2 Boot Manag 50 OnTrack DM 94 Amoeba BBT e3 DOS R/Ob W95 FAT32 51 OnTrack DM6 Aux 9f BSD/OS e4 SpeedStorc W95 FAT32 (LBA) 52 CP/M a0 IBM Thinkpad hi eb BeOS fse W95 FAT16 (LBA) 53 OnTrack DM6 Aux a5 FreeBSD ee GPTf W95 Ext\'d (LBA) 54 OnTrackDM6 a6 OpenBSD ef EFI (FAT-12/16/
10 OPUS 55 EZ-Drive a7 NeXTSTEP f0 Linux/PA-RISC b
11 Hidden FAT12 56 Golden Bow a8 Darwin UFS f1 SpeedStor
12 Compaq diagnost 5c Priam Edisk a9 NetBSD f4 SpeedStor
14 Hidden FAT16 <3 61 SpeedStor ab Darwin boot f2 DOS secondary
16 Hidden FAT16 63 GNU HURD or Sys af HFS / HFS+ fb VMware VMFS
17 Hidden HPFS/NTF 64 Novell Netware b7 BSDI fs fc VMware VMKCORE
18 AST SmartSleep 65 Novell Netware b8 BSDI swap fd Linux raid auto
1b Hidden W95 FAT3 70 DiskSecure Mult bb Boot Wizard hid fe LANstep
1c Hidden W95 FAT3 75 PC/IX be Solaris boot ff BBT
1e Hidden W95 FAT1 80 Old Minix
Hex code (type L to list all codes): 8e
Changed type of partition 'Linux' to 'Linux LVM'Command (m for help): p #打印修改后的分区表Disk /dev/sdb: 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: 0x8b654c5bDevice Boot Start End Blocks Id System
/dev/sdb1 2048 104857599 52427776 8e Linux LVMCommand (m for help): w #保存退出
The partition table has been altered!Calling ioctl() to re-read partition table.
Syncing disks.
[root@localhost ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 60G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 59G 0 part├─centos-root 253:0 0 37G 0 lvm /├─centos-swap 253:1 0 3.9G 0 lvm [SWAP]└─centos-home 253:2 0 18.1G 0 lvm /home
sdb 8:16 0 50G 0 disk
└─sdb1 8:17 0 50G 0 part
sr0 11:0 1 1024M 0 rom创建物理卷
[root@localhost ~]# pvcreate /dev/sdb1Physical volume "/dev/sdb1" successfully created.
# 查看物理卷创建情况
[root@localhost ~]# pvdisplay--- Physical volume ---PV Name /dev/sda2VG Name centosPV Size <59.00 GiB / not usable 3.00 MiBAllocatable yesPE Size 4.00 MiBTotal PE 15103Free PE 1Allocated PE 15102PV UUID 6re5Yh-Aq8t-0vcd-busl-yly0-LF3u-8o22DL"/dev/sdb1" is a new physical volume of "<50.00 GiB"--- NEW Physical volume ---PV Name /dev/sdb1 VG NamePV Size <50.00 GiBAllocatable NOPE Size 0Total PE 0Free PE 0Allocated PE 0PV UUID haSSH9-YPNP-Ptsy-iUQa-NQl6-r7yH-tet4v4将物理卷PV加入卷组VG
[root@localhost ~]# vgdisplay--- Volume group ---VG Name centosSystem IDFormat lvm2Metadata Areas 1Metadata Sequence No 4VG Access read/writeVG Status resizableMAX LV 0Cur LV 3Open LV 3Max PV 0Cur PV 1Act PV 1VG Size <59.00 GiBPE Size 4.00 MiBTotal PE 15103Alloc PE / Size 15102 / 58.99 GiBFree PE / Size 1 / 4.00 MiBVG UUID rhqZaQ-Uxug-cylo-UTVI-m8Em-goxa-KLVcoa
将新的分区/dev/sdb1加入卷组中，卷组名为centos
[root@localhost ~]# vgextend centos /dev/sdb1Volume group "centos" successfully extended
[root@localhost ~]# vgdisplay--- Volume group ---VG Name centosSystem IDFormat lvm2Metadata Areas 2Metadata Sequence No 5VG Access read/writeVG Status resizableMAX LV 0Cur LV 3Open LV 3Max PV 0Cur PV 2Act PV 2VG Size 108.99 GiB #可以看到容量增加了PE Size 4.00 MiBTotal PE 27902Alloc PE / Size 15102 / 58.99 GiBFree PE / Size 12800 / 50.00 GiBVG UUID rhqZaQ-Uxug-cylo-UTVI-m8Em-goxa-KLVcoa
扩展已有分区
当前centos根分区只有40G，扩展根分区
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 1.9G 0 1.9G 0% /dev
tmpfs 1.9G 0 1.9G 0% /dev/shm
tmpfs 1.9G 12M 1.9G 1% /run
tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup
/dev/mapper/centos-root 38G 6.9G 31G 19% /
/dev/sda1 1014M 195M 820M 20% /boot
/dev/mapper/centos-home 19G 33M 19G 1% /home
tmpfs 378M 0 378M 0% /run/user/998
tmpfs 378M 0 378M 0% /run/user/0[root@localhost ~]# lvextend -l +100%FREE /dev/mapper/centos-rootSize of logical volume centos/root changed from <37.04 GiB (9481 extents) to <87.04 GiB (22281 extents).Logical volume centos/root successfully resized.
[root@localhost ~]# lvdisplay /dev/mapper/centos-root--- Logical volume ---LV Path /dev/centos/rootLV Name rootVG Name centosLV UUID hVt6Ll-LPMN-gulw-JcuF-q0Ry-gIfX-uy9rWxLV Write Access read/writeLV Creation host, time localhost.localdomain, 2024-08-13 05:59:06 +0000LV Status available# open 1LV Size <87.04 GiB #已扩容Current LE 22281Segments 2Allocation inheritRead ahead sectors auto- currently set to 8192Block device 253:0
[root@localhost ~]# xfs_growfs /dev/mapper/centos-root #更新分配的空间
meta-data=/dev/mapper/centos-root isize=512 agcount=4, agsize=2427136 blks= sectsz=512 attr=2, projid32bit=1= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=9708544, imaxpct=25= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal bsize=4096 blocks=4740, version=2= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 9708544 to 22815744
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 1.9G 0 1.9G 0% /dev
tmpfs 1.9G 0 1.9G 0% /dev/shm
tmpfs 1.9G 12M 1.9G 1% /run
tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup
/dev/mapper/centos-root 88G 6.9G 81G 8% / #已扩容根分区
/dev/sda1 1014M 195M 820M 20% /boot
/dev/mapper/centos-home 19G 33M 19G 1% /home
tmpfs 378M 0 378M 0% /run/user/998
tmpfs 378M 0 378M 0% /run/user/0