lvm磁盘扩容

LVM实现新挂载磁盘扩容到原有目录

#查看磁盘
fdisk -l
#创建pv
pvcreate /dev/sdb
[ ~]# pvcreate /dev/sdb 
  Physical volume "/dev/sdb" successfully created.
[ ~]# pvdisplay 
  --- Physical volume ---
  PV Name               /dev/sda2
  VG Name               centos
  PV Size               29.51 GiB / not usable 3.00 MiB
  Allocatable           yes 
  PE Size               4.00 MiB
  Total PE              7554
  Free PE               10
  Allocated PE          7544
  PV UUID               jfRAJl-pnUs-8lXi-1F37-IX3t-Nq8S-RdtQvq
   
  "/dev/sdb" is a new physical volume of "100.00 GiB"
  --- NEW Physical volume ---
  PV Name               /dev/sdb
  VG Name               
  PV Size               100.00 GiB
  Allocatable           NO
  PE Size               0   
  Total PE              0
  Free PE               0
  Allocated PE          0
  PV UUID               ggiAwS-NizD-1liX-7b5i-fqpR-ZKL8-t8aZqD
#查看VG
[ ~]# vgdisplay 
  --- Volume group ---
  VG Name               centos
  System ID             
  Format                lvm2
  Metadata Areas        2
  Metadata Sequence No  6
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                2
  Open LV               2
  Max PV                0
  Cur PV                2
  Act PV                2
  VG Size               129.50 GiB
  PE Size               4.00 MiB
  Total PE              33153
  Alloc PE / Size       33153 / 129.50 GiB
  Free  PE / Size       0 / 0   
  VG UUID               Y9ksOO-scOb-2VAn-bGUB-vX9U-oVee-mPt59q
[ ~]# vgextend centos /dev/sdb
  Volume group "centos" successfully extended
[ ~]# lvextend -l +100%FREE /dev/mapper/centos-root
  Size of logical volume centos/root changed from 26.51 GiB (6786 extents) to 126.50 GiB (32385 extents).
  Logical volume centos/root successfully resized.
#创建vg
lvextend -l +100%FREE /dev/mapper/centos-root
#查看文件系统
[ ~]# df -T
Filesystem              Type     1K-blocks    Used Available Use% Mounted on
/dev/mapper/centos-root xfs       27740944 9828872  17912072  36% /
devtmpfs                devtmpfs   3994572       0   3994572   0% /dev
tmpfs                   tmpfs      4005240       0   4005240   0% /dev/shm
tmpfs                   tmpfs      4005240  403684   3601556  11% /run
tmpfs                   tmpfs      4005240       0   4005240   0% /sys/fs/cgroup
/dev/sda1               xfs         508588  191684    316904  38% /boot
#是添加的磁盘生效
[ ~]# xfs_growfs /dev/mapper/centos-root
meta-data=/dev/mapper/centos-root isize=256    agcount=4, agsize=1734656 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=0        finobt=0 spinodes=0
data     =                       bsize=4096   blocks=6938624, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=0
log      =internal               bsize=4096   blocks=3388, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data blocks changed from 6938624 to 33162240
#验证
Filesystem               Size  Used Avail Use% Mounted on
/dev/mapper/centos-root  127G  9.4G  118G   8% /
devtmpfs                 3.9G     0  3.9G   0% /dev
tmpfs                    3.9G     0  3.9G   0% /dev/shm
tmpfs                    3.9G  395M  3.5G  11% /run
tmpfs                    3.9G     0  3.9G   0% /sys/fs/cgroup
/dev/sda1                497M  188M  310M  38% /boot