LVM扩容根分区

1 添加一块新磁盘

2 创建PV

[root@harbor ~]# pvcreate /dev/vdb 
WARNING: dos signature detected on /dev/vdb at offset 510. Wipe it? [y/n]: 
  WARNING: Invalid input ''.
WARNING: dos signature detected on /dev/vdb at offset 510. Wipe it? [y/n]: y
  Wiping dos signature on /dev/vdb.
  Physical volume "/dev/vdb" successfully created.

3 扩容VG

[root@harbor ~]# vgextend /dev/centos /dev/vdb 
  Volume group "centos" successfully extended
[root@harbor ~]# 
[root@harbor ~]# vgs 
  VG     #PV #LV #SN Attr   VSize   VFree   
  centos   2   2   0 wz--n- 538.99g <500.00g

4 扩容LVM

[root@harbor ~]# lvextend -l +100%FREE /dev/centos/root 
  Size of logical volume centos/root changed from <35.00 GiB (8959 extents) to 534.99 GiB (136958 extents).
  Logical volume centos/root successfully resized.

　　

5 扩展文件系统

[root@harbor ~]# xfs_growfs /dev/centos/root
meta-data=/dev/mapper/centos-root isize=512 agcount=4, agsize=2293504 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=9174016, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal bsize=4096 blocks=4479, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 9174016 to 140244992

　　

[root@harbor ~]# df -hT
Filesystem              Type      Size  Used Avail Use% Mounted on
devtmpfs                devtmpfs  3.8G     0  3.8G   0% /dev
tmpfs                   tmpfs     3.9G     0  3.9G   0% /dev/shm
tmpfs                   tmpfs     3.9G   11M  3.8G   1% /run
tmpfs                   tmpfs     3.9G     0  3.9G   0% /sys/fs/cgroup
/dev/mapper/centos-root xfs       535G  1.5G  534G   1% /
/dev/vda1               xfs      1014M  171M  844M  17% /boot
tmpfs                   tmpfs     779M     0  779M   0% /run/user/0