Linux lvm扩容

[root@szxdb software]# lsblk 
NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda               8:0    0   60G  0 disk 
├─sda1            8:1    0    1G  0 part /boot
└─sda2            8:2    0   59G  0 part 
  ├─centos-root 253:0    0 38.3G  0 lvm  /
  ├─centos-swap 253:1    0    2G  0 lvm  [SWAP]
  └─centos-home 253:2    0 18.7G  0 lvm  /home
sdb               8:16   0  300G  0 disk 
sr0              11:0    1 1024M  0 rom  
[root@szxdb software]# lsblk -f
NAME            FSTYPE      LABEL UUID                                   MOUNTPOINT
sda                                                                      
├─sda1          xfs               736c31a9-99c2-4a7d-aef4-6e0f2e877ceb   /boot
└─sda2          LVM2_member       RrMd6r-7hKr-J3pu-L1kC-BpwR-Paj3-ebdCYb 
  ├─centos-root xfs               047fd870-ae52-4b7f-a018-637e69f502d9   /
  ├─centos-swap swap              74a537ad-6d61-4e4e-879f-667cba216848   [SWAP]
  └─centos-home xfs               98f13f9c-274f-4cee-b465-26b3f60bf4ae   /home
sdb                                                                      
sr0                                                                      
[root@szxdb software]# df -h
文件系统                 容量  已用  可用 已用% 挂载点
devtmpfs                 7.8G     0  7.8G    0% /dev
tmpfs                    7.8G     0  7.8G    0% /dev/shm
tmpfs                    7.8G   12M  7.8G    1% /run
tmpfs                    7.8G     0  7.8G    0% /sys/fs/cgroup
/dev/mapper/centos-root   39G  6.3G   32G   17% /
/dev/sda1               1014M  154M  861M   16% /boot
/dev/mapper/centos-home   19G   12G  7.6G   60% /home
tmpfs                    1.6G     0  1.6G    0% /run/user/0
[root@szxdb software]# mkfs.xfs /dev/sdb
meta-data=/dev/sdb               isize=512    agcount=4, agsize=19660800 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=0, sparse=0
data     =                       bsize=4096   blocks=78643200, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal log           bsize=4096   blocks=38400, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
[root@szxdb software]# lsblk -f
NAME            FSTYPE      LABEL UUID                                   MOUNTPOINT
sda                                                                      
├─sda1          xfs               736c31a9-99c2-4a7d-aef4-6e0f2e877ceb   /boot
└─sda2          LVM2_member       RrMd6r-7hKr-J3pu-L1kC-BpwR-Paj3-ebdCYb 
  ├─centos-root xfs               047fd870-ae52-4b7f-a018-637e69f502d9   /
  ├─centos-swap swap              74a537ad-6d61-4e4e-879f-667cba216848   [SWAP]
  └─centos-home xfs               98f13f9c-274f-4cee-b465-26b3f60bf4ae   /home
sdb             xfs               07d4dcd6-b4bd-40ae-a1f3-fd8098551063   
sr0                                                                      
[root@szxdb software]# pvcreate /dev/sdb
WARNING: xfs signature detected on /dev/sdb at offset 0. Wipe it? [y/n]: y
  Wiping xfs signature on /dev/sdb.
  Physical volume "/dev/sdb" successfully created.
[root@szxdb software]# vgs
  VG     #PV #LV #SN Attr   VSize   VFree
  centos   1   3   0 wz--n- <59.00g 4.00m
[root@szxdb software]# vgextend centos /dev/sdb
  Volume group "centos" successfully extended
[root@szxdb software]# df -h
文件系统                 容量  已用  可用 已用% 挂载点
devtmpfs                 7.8G     0  7.8G    0% /dev
tmpfs                    7.8G     0  7.8G    0% /dev/shm
tmpfs                    7.8G   12M  7.8G    1% /run
tmpfs                    7.8G     0  7.8G    0% /sys/fs/cgroup
/dev/mapper/centos-root   39G  6.3G   32G   17% /
/dev/sda1               1014M  154M  861M   16% /boot
/dev/mapper/centos-home   19G   12G  7.6G   60% /home
tmpfs                    1.6G     0  1.6G    0% /run/user/0
[root@szxdb software]# lvextend /dev/mapper/centos-home /dev/sdb
  Size of logical volume centos/home changed from <18.70 GiB (4786 extents) to 318.69 GiB (81585 extents).
  Logical volume centos/home successfully resized.
[root@szxdb software]# df -h
文件系统                 容量  已用  可用 已用% 挂载点
devtmpfs                 7.8G     0  7.8G    0% /dev
tmpfs                    7.8G     0  7.8G    0% /dev/shm
tmpfs                    7.8G   12M  7.8G    1% /run
tmpfs                    7.8G     0  7.8G    0% /sys/fs/cgroup
/dev/mapper/centos-root   39G  6.3G   32G   17% /
/dev/sda1               1014M  154M  861M   16% /boot
/dev/mapper/centos-home   19G   12G  7.6G   60% /home
tmpfs                    1.6G     0  1.6G    0% /run/user/0
[root@szxdb software]# xfs_growfs /dev/mapper/centos-home
meta-data=/dev/mapper/centos-home isize=512    agcount=4, agsize=1225216 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=0 spinodes=0
data     =                       bsize=4096   blocks=4900864, 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 4900864 to 83543040
[root@szxdb software]# df -h
文件系统                 容量  已用  可用 已用% 挂载点
devtmpfs                 7.8G     0  7.8G    0% /dev
tmpfs                    7.8G     0  7.8G    0% /dev/shm
tmpfs                    7.8G   12M  7.8G    1% /run
tmpfs                    7.8G     0  7.8G    0% /sys/fs/cgroup
/dev/mapper/centos-root   39G  6.3G   32G   17% /
/dev/sda1               1014M  154M  861M   16% /boot
/dev/mapper/centos-home  319G   12G  308G    4% /home
tmpfs                    1.6G     0  1.6G    0% /run/user/0