How to extend disk proxmox without restart centos 7
Checking the disk size
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 15G 36G 29% /
devtmpfs 3.9G 0 3.9G 0% /dev
tmpfs 3.9G 0 3.9G 0% /dev/shm
tmpfs 3.9G 8.4M 3.9G 1% /run
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
/dev/mapper/centos-home 242G 242G 3.2M 100% /home
/dev/sda1 497M 264M 233M 54% /boot
tmpfs 783M 0 783M 0% /run/user/0
[root@localhost ~]#
Check the block size and disk block mapping
[root@localhost ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 300G 0 disk
├─sda1 8:1 0 500M 0 part /boot
└─sda2 8:2 0 299.5G 0 part
├─centos-root 253:0 0 50G 0 lvm /
├─centos-swap 253:1 0 7.9G 0 lvm [SWAP]
└─centos-home 253:2 0 241.6G 0 lvm /home
[root@localhost ~]#
Check the physical volume
[root@localhost ~]# pvdisplay
--- Physical volume ---
PV Name /dev/sda2
VG Name centos
PV Size 299.51 GiB / not usable 3.00 MiB
Allocatable yes
PE Size 4.00 MiB
Total PE 76674
Free PE 16
Allocated PE 76658
PV UUID nY5L1J-haQq-vtUR-GgnY-mQ0J-JyvY-SxPkZC
[root@localhost ~]#
Check the scsi host and rescan
[root@localhost ~]# ls /sys/class/scsi_host/
host0 host1
[root@localhost ~]#
[root@localhost ~]# sudo echo "- - -" > /sys/class/scsi_host/host0/scan
[root@localhost ~]# sudo echo "- - -" > /sys/class/scsi_host/host1/scan
[root@localhost ~]#
Check the scsi device and rescan
[root@localhost ~]# ls /sys/class/scsi_device/
0:0:0:0
[root@localhost ~]#
[root@localhost ~]# echo 1 > /sys/class/scsi_device/0\:0\:0\:0/device/rescan
[root@localhost ~]#
Perform running partition editor
[root@localhost ~]# fdisk /dev/sda
fdisk: cannot open /dev/sda: No such file or directory
[root@localhost ~]# ls /dev/sd*
/dev/sdb /dev/sdb1 /dev/sdb2
[root@localhost ~]#
Perform running partition editor
[root@localhost ~]# fdisk /dev/sdb
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): m
Command action
a toggle a bootable flag
b edit bsd disklabel
c toggle the dos compatibility flag
d delete a partition
g create a new empty GPT partition table
G create an IRIX (SGI) partition table
l list known partition types
m print this menu
n add a new partition
o create a new empty DOS partition table
p print the partition table
q quit without saving changes
s create a new empty Sun disklabel
t change a partition's system id
u change display/entry units
v verify the partition table
w write table to disk and exit
x extra functionality (experts only)
Command (m for help): p
Disk /dev/sdb: 536.9 GB, 536870912000 bytes, 1048576000 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: 0x00006bc0
Device Boot Start End Blocks Id System
/dev/sdb1 * 2048 1026047 512000 83 Linux
/dev/sdb2 1026048 629145599 314059776 8e Linux LVM
Command (m for help): n
Partition type:
p primary (2 primary, 0 extended, 2 free)
e extended
Select (default p):
Using default response p
Partition number (3,4, default 3):
First sector (629145600-1048575999, default 629145600):
Using default value 629145600
Last sector, +sectors or +size{K,M,G} (629145600-1048575999, default 1048575999):
Using default value 1048575999
Partition 3 of type Linux and of size 200 GiB is set
Command (m for help): t
Partition number (1-3, default 3):
Hex code (type L to list all codes): L
0 Empty 24 NEC DOS 81 Minix / old Lin bf Solaris
1 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 Syrinx
5 Extended 41 PPC PReP Boot 86 NTFS volume set da Non-FS data
6 FAT16 42 SFS 87 NTFS volume set db CP/M / CTOS / .
7 HPFS/NTFS/exFAT 4d QNX4.x 88 Linux plaintext de Dell Utility
8 AIX 4e QNX4.x 2nd part 8e Linux LVM df BootIt
9 AIX bootable 4f QNX4.x 3rd part 93 Amoeba e1 DOS access
a OS/2 Boot Manag 50 OnTrack DM 94 Amoeba BBT e3 DOS R/O
b W95 FAT32 51 OnTrack DM6 Aux 9f BSD/OS e4 SpeedStor
c W95 FAT32 (LBA) 52 CP/M a0 IBM Thinkpad hi eb BeOS fs
e W95 FAT16 (LBA) 53 OnTrack DM6 Aux a5 FreeBSD ee GPT
f 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
Disk /dev/sdb: 536.9 GB, 536870912000 bytes, 1048576000 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: 0x00006bc0
Device Boot Start End Blocks Id System
/dev/sdb1 * 2048 1026047 512000 83 Linux
/dev/sdb2 1026048 629145599 314059776 8e Linux LVM
/dev/sdb3 629145600 1048575999 209715200 8e 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 ~]#
Running partprobe command
[root@localhost ~]# partprobe
[root@localhost ~]#
Create physical volume
[root@localhost ~]# pvcreate /dev/sdb3
Physical volume "/dev/sdb3" successfully created
[root@localhost ~]#
Check the physical volume after running partition
[root@localhost ~]# pvdisplay
--- Physical volume ---
PV Name /dev/sdb2
VG Name centos
PV Size 299.51 GiB / not usable 3.00 MiB
Allocatable yes
PE Size 4.00 MiB
Total PE 76674
Free PE 16
Allocated PE 76658
PV UUID nY5L1J-haQq-vtUR-GgnY-mQ0J-JyvY-SxPkZC
"/dev/sdb3" is a new physical volume of "200.00 GiB"
--- NEW Physical volume ---
PV Name /dev/sdb3
VG Name
PV Size 200.00 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID 1RIkXk-Scbr-Fbwx-NO6Y-4EWh-UNPT-RW9vGv
[root@localhost ~]#
Show the disk size
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 15G 36G 29% /
devtmpfs 3.9G 0 3.9G 0% /dev
tmpfs 3.9G 0 3.9G 0% /dev/shm
tmpfs 3.9G 8.4M 3.9G 1% /run
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
/dev/mapper/centos-home 242G 242G 3.2M 100% /home
tmpfs 783M 0 783M 0% /run/user/0
/dev/sdb1 497M 264M 233M 54% /boot
[root@localhost ~]#
Extend the centos volume group
[root@localhost ~]# vgextend centos /dev/sdb3
Volume group "centos" successfully extended
[root@localhost ~]#
Extend logical volume home
[root@localhost ~]# lvextend -L +200G /dev/mapper/centos-home
Size of logical volume centos/home changed from 241.57 GiB (61842 extents) to 441.57 GiB (113042 extents).
Logical volume home successfully resized.
[root@localhost ~]#
[root@localhost ~]# xfs_growfs /dev/mapper/centos-home
meta-data=/dev/mapper/centos-home isize=256 agcount=4, agsize=15831552 blks
= sectsz=512 attr=2, projid32bit=1
= crc=0 finobt=0
data = bsize=4096 blocks=63326208, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=0
log =internal bsize=4096 blocks=30921, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 63326208 to 115755008
[root@localhost ~]#
Check the disk size after extending
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 15G 36G 29% /
devtmpfs 3.9G 0 3.9G 0% /dev
tmpfs 3.9G 0 3.9G 0% /dev/shm
tmpfs 3.9G 8.4M 3.9G 1% /run
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
/dev/mapper/centos-home 442G 242G 201G 55% /home
tmpfs 783M 0 783M 0% /run/user/0
/dev/sdb1 497M 264M 233M 54% /boot
[root@localhost ~]#
Check the disk block mapping
[root@localhost ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sdb 8:16 0 500G 0 disk
├─sdb1 8:17 0 500M 0 part /boot
├─sdb2 8:18 0 299.5G 0 part
│ ├─centos-root 253:0 0 50G 0 lvm /
│ ├─centos-swap 253:1 0 7.9G 0 lvm [SWAP]
│ └─centos-home 253:2 0 441.6G 0 lvm /home
└─sdb3 8:19 0 200G 0 part
└─centos-home 253:2 0 441.6G 0 lvm /home
[root@localhost ~]#
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