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
 [root@VM-67-49 ~]# pvcreate /dev/sdb
   Physical volume "/dev/sdb" successfully created.
 [root@VM-67-49 ~]# 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
 [root@VM-67-49 ~]# 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
 [root@VM-66-82 ~]# vgextend centos /dev/sdb
   Volume group "centos" successfully extended
 [root@VM-66-82 ~]# 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
 [root@VM-67-49 ~]# 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
 [root@VM-67-49 ~]# 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