Centos7扩容
Centos7扩容
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保证虚拟机关机且没有快照的情况下按照下图进行操作：
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设置好后开机，查看分区情况：
[root@localhost ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 17G 12G 5.4G 69% / devtmpfs 901M 0 901M 0% /dev tmpfs 912M 0 912M 0% /dev/shm tmpfs 912M 8.7M 903M 1% /run tmpfs 912M 0 912M 0% /sys/fs/cgroup /dev/sda1 1014M 143M 872M 15% /boot tmpfs 183M 0 183M 0% /run/user/1000 tmpfs 183M 0 183M 0% /run/user/0 [root@localhost ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 50G 0 disk ├─sda1 8:1 0 1G 0 part /boot └─sda2 8:2 0 19G 0 part├─centos-root 253:0 0 17G 0 lvm /└─centos-swap 253:1 0 2G 0 lvm [SWAP] sr0 11:0 1 792M 0 rom [root@localhost ~]# -
新建分区，并将id改为8e
[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):
First sector (41943040-104857599, default 41943040):
Using default value 41943040
Last sector, +sectors or +size{K,M,G} (41943040-104857599, default 104857599):
Using default value 104857599
Partition 3 of type Linux and of size 30 GiB is setCommand (m for help): pDisk /dev/sda: 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: 0x0009b29bDevice Boot Start End Blocks Id System
/dev/sda1 * 2048 2099199 1048576 83 Linux
/dev/sda2 2099200 41943039 19921920 8e Linux LVM
/dev/sda3 41943040 104857599 31457280 83 LinuxCommand (m for help): t
Partition number (1-3, default 3): l
Partition number (1-3, default 3):
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): 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 ~]#
- 查看sda3是否存在
[root@localhost ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 50G 0 disk
├─sda1 8:1 0 1G 0 part /boot
├─sda2 8:2 0 19G 0 part
│ ├─centos-root 253:0 0 17G 0 lvm /
│ └─centos-swap 253:1 0 2G 0 lvm [SWAP]
└─sda3 8:3 0 30G 0 part
sr0 11:0 1 792M 0 rom
[root@localhost ~]#
- 使用lvm命令新建卷/dev/sda3,并将其加载到卷组centos中
[root@localhost ~]# lvm
lvm> pvcreate /dev/sda3Physical volume "/dev/sda3" successfully created.
lvm> pvdisplay--- Physical volume ---PV Name /dev/sda2VG Name centosPV Size <19.00 GiB / not usable 3.00 MiBAllocatable yes (but full)PE Size 4.00 MiBTotal PE 4863Free PE 0Allocated PE 4863PV UUID b38Zdi-fdFl-E12C-ZLHj-G3SN-BBqv-MKybr0"/dev/sda3" is a new physical volume of "30.00 GiB"--- NEW Physical volume ---PV Name /dev/sda3VG NamePV Size 30.00 GiBAllocatable NOPE Size 0Total PE 0Free PE 0Allocated PE 0PV UUID sF8pQr-b8yy-kBL0-afqe-Jj4z-UYCa-JLqxvylvm> vgdisplay--- Volume group ---VG Name centosSystem IDFormat lvm2Metadata Areas 1Metadata Sequence No 3VG Access read/writeVG Status resizableMAX LV 0Cur LV 2Open LV 2Max PV 0Cur PV 1Act PV 1VG Size <19.00 GiBPE Size 4.00 MiBTotal PE 4863Alloc PE / Size 4863 / <19.00 GiBFree PE / Size 0 / 0VG UUID SLf1Z5-hZG3-Z6y8-Mc25-Ofxi-uLVe-0irckqlvm> vgextend centos /dev/sda3Volume group "centos" successfully extended
lvm> vgdisplay--- Volume group ---VG Name centosSystem IDFormat lvm2Metadata Areas 2Metadata Sequence No 4VG Access read/writeVG Status resizableMAX LV 0Cur LV 2Open LV 2Max PV 0Cur PV 2Act PV 2VG Size 48.99 GiBPE Size 4.00 MiBTotal PE 12542Alloc PE / Size 4863 / <19.00 GiBFree PE / Size 7679 / <30.00 GiBVG UUID SLf1Z5-hZG3-Z6y8-Mc25-Ofxi-uLVe-0irckqlvm> lvextend -l +100%FREE /dev/centos/rootSize of logical volume centos/root changed from <17.00 GiB (4351 extents) to 46.99 GiB (12030 extents).Logical volume centos/root successfully resized.
lvm> exitExiting.
[root@localhost ~]#
- 同步到文件系统，对根目录的扩容
[root@localhost ~]# xfs_growfs /dev/centos/root
meta-data=/dev/mapper/centos-root isize=512 agcount=4, agsize=1113856 blks= sectsz=512 attr=2, projid32bit=1= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=4455424, 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 4455424 to 12318720
- 查看扩容是否成功
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 47G 12G 36G 25% /
devtmpfs 901M 0 901M 0% /dev
tmpfs 912M 0 912M 0% /dev/shm
tmpfs 912M 8.7M 903M 1% /run
tmpfs 912M 0 912M 0% /sys/fs/cgroup
/dev/sda1 1014M 143M 872M 15% /boot
tmpfs 183M 0 183M 0% /run/user/1000
tmpfs 183M 0 183M 0% /run/user/0
[root@localhost ~]#
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Centos7扩容
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