背景 #
工作用的Linux 虚机使用的是默认安装， 根只分了50G的空间, 用着用着就不够了，所以想着给扩个空间。
[root@localhost repository]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 41G 9.4G 82% /
devtmpfs 32G 0 32G 0% /dev
tmpfs 32G 0 32G 0% /dev/shm
tmpfs 32G 637M 31G 2% /run
tmpfs 32G 0 32G 0% /sys/fs/cgroup
/dev/sda1 1014M 150M 865M 15% /boot
/dev/mapper/centos-home 441G 15G 427G 4% /home
overlay 50G 41G 9.4G 82% /var/lib/docker/overlay2/398d2eeb78bef327ecaca5cd7de0087ce59f76a938e5ef5dbce91c2895a4b1aa/merged
overlay 50G 41G 9.4G 82% /var/lib/docker/overlay2/0f05cdc7e42716c57997501e96310ca1769824b28ea91d2509502a35be589840/merged
overlay 50G 41G 9.4G 82% /var/lib/docker/overlay2/5c10dbf435357bf50eecc148cb9a90d211384abca9fd9a5314de5fc62910c6f5/merged
overlay 50G 41G 9.4G 82% /var/lib/docker/overlay2/a0fe47c9a9dca33b1fcfd35684aadc2037dc1398a23b2b09ebcad476636e0dab/merged
overlay 50G 41G 9.4G 82% /var/lib/docker/overlay2/2eb88ff71135e7b9be851a22905aeded34038a1bdf06cf5d9c963a8378ecc923/merged
overlay 50G 41G 9.4G 82% /var/lib/docker/overlay2/2013e4d4c128e0da65e969cfc432850615257874a81dd7bf73ade4bec75c4600/merged
overlay 50G 41G 9.4G 82% /var/lib/docker/overlay2/912b49fbc5ead76d17e25059db4301cbcd0230e6be9063c5e17c6c9a1279da01/merged
tmpfs 6.3G 0 6.3G 0% /run/user/0
overlay 50G 41G 9.4G 82% /var/lib/docker/overlay2/11a70ceeddd9c3201fef095c4e65d61e24d1429a5c3e04b90310e1f3ebda6572/merged
Step1: 添加新硬盘，格式化分区 #
[root@localhost repository]# fdisk -l
Disk /dev/sda: 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: 0x000cf381
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 2099199 1048576 83 Linux
/dev/sda2 2099200 1048575999 523238400 8e Linux LVM
Disk /dev/mapper/centos-root: 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 /dev/mapper/centos-swap: 8455 MB, 8455716864 bytes, 16515072 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 /dev/mapper/centos-home: 473.6 GB, 473645973504 bytes, 925089792 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 /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
[root@localhost repository]#
[root@localhost repository]#
[root@localhost repository]#
[root@localhost repository]#
You have new mail in /var/spool/mail/root
[root@localhost repository]#
[root@localhost repository]#
[root@localhost repository]#
[root@localhost repository]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 500G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 499G 0 part
├─centos-root 253:0 0 50G 0 lvm /
├─centos-swap 253:1 0 7.9G 0 lvm [SWAP]
└─centos-home 253:2 0 441.1G 0 lvm /home
sdb 8:16 0 500G 0 disk
sr0 11:0 1 1024M 0 rom
[root@localhost repository]#
[root@localhost repository]#
[root@localhost repository]#
[root@localhost repository]# 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.
Device does not contain a recognized partition table
Building a new DOS disklabel with disk identifier 0x64836409.
Command (m for help): n
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p):
Using default response p
Partition number (1-4, default 1):
First sector (2048-1048575999, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-1048575999, default 1048575999):
Using default value 1048575999
Partition 1 of type Linux and of size 500 GiB is set
Command (m for help):
Command (m for help):
Command (m for help):
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
[root@localhost repository]#
格式化分区
[root@localhost repository]# mkfs.ext4 /dev/sdb1
mke2fs 1.42.9 (28-Dec-2013)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
32768000 inodes, 131071744 blocks
6553587 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=2279604224
4000 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968,
102400000
Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
[root@localhost repository]#
Step 2:调整逻辑卷大小 #
[root@localhost repository]# vgextend centos /dev/sdb1
WARNING: ext4 signature detected on /dev/sdb1 at offset 1080. Wipe it? [y/n]: y
Wiping ext4 signature on /dev/sdb1.
Physical volume "/dev/sdb1" successfully created.
Volume group "centos" successfully extended
[root@localhost repository]#
[root@localhost repository]#
[root@localhost repository]# pvs
PV VG Fmt Attr PSize PFree
/dev/sda2 centos lvm2 a-- <499.00g 4.00m
/dev/sdb1 centos lvm2 a-- <500.00g <500.00g
[root@localhost repository]#
[root@localhost repository]#
[root@localhost repository]# vgs
VG #PV #LV #SN Attr VSize VFree
centos 2 3 0 wz--n- 998.99g 500.00g
[root@localhost ~]# lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
home centos -wi-ao---- <441.12g
root centos -wi-ao---- 50.00g
swap centos -wi-ao---- <7.88g
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]# lvextend -L 550G /dev/mapper/centos-root
Size of logical volume centos/root changed from 50.00 GiB (12800 extents) to 550.00 GiB (140800 extents).
Logical volume centos/root successfully resized.
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]# pvs
PV VG Fmt Attr PSize PFree
/dev/sda2 centos lvm2 a-- <499.00g 0
/dev/sdb1 centos lvm2 a-- <500.00g 0
[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 144179200
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 550G 41G 510G 8% /
devtmpfs 32G 0 32G 0% /dev
tmpfs 32G 0 32G 0% /dev/shm
tmpfs 32G 637M 31G 2% /run
tmpfs 32G 0 32G 0% /sys/fs/cgroup
/dev/sda1 1014M 150M 865M 15% /boot
/dev/mapper/centos-home 441G 15G 427G 4% /home