LVM 扩容 - 添加新硬盘

vmware虚拟机空间不足，进行扩容

VMware挂载硬盘

挂载之后，默认不会被系统发现，需要执行命令添加

ls /sys/class/scsi_host/
echo "- - -" > /sys/class/scsi_host/host0/scan
echo "- - -" > /sys/class/scsi_host/host1/scan
echo "- - -" > /sys/class/scsi_host/host2/scan

查看当前状况

查看物理卷

$ pvs
  PV         VG     Fmt  Attr PSize  PFree 
  /dev/sda2  centos lvm2 a--  49.51g     0 
  /dev/sdb1  centos lvm2 a--  50.00g 40.00m
$ pvdisplay 
  --- Physical volume ---
  PV Name               /dev/sda2
  VG Name               centos
  PV Size               49.51 GiB / not usable 3.00 MiB
  Allocatable           yes (but full)
  PE Size               4.00 MiB
  Total PE              12674
  Free PE               0
  Allocated PE          12674
  PV UUID               5ocR0z-ZfDF-sjE6-llnD-ilcJ-BNTE-G1MAhe
   
  --- Physical volume ---
  PV Name               /dev/sdb1
  VG Name               centos
  PV Size               50.00 GiB / not usable 3.00 MiB
  Allocatable           yes 
  PE Size               4.00 MiB
  Total PE              12799
  Free PE               10
  Allocated PE          12789
  PV UUID               nCUaT0-IPJy-zeCK-ITj1-un2I-FQIc-aYmj3V

查看逻辑卷组

$ vgs
  VG     #PV #LV #SN Attr   VSize  VFree 
  centos   2   2   0 wz--n- 99.50g 40.00m
$ vgdisplay 
  --- Volume group ---
  VG Name               centos
  System ID             
  Format                lvm2
  Metadata Areas        2
  Metadata Sequence No  5
  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               99.50 GiB
  PE Size               4.00 MiB
  Total PE              25473
  Alloc PE / Size       25463 / 99.46 GiB
  Free  PE / Size       10 / 40.00 MiB
  VG UUID               v9I5Jd-OOFk-0VUV-Yhq4-eAnC-CHKO-DQ9mlx

查看逻辑卷

$ lvs
  LV   VG     Attr       LSize  Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  root centos -wi-ao---- 97.46g                                                    
  swap centos -wi-ao----  2.00g                                                    
$ lvdisplay 
  --- Logical volume ---
  LV Path                /dev/centos/swap
  LV Name                swap
  VG Name                centos
  LV UUID                QEWL0J-KDEi-A6uH-OgGl-65hZ-NZhh-dCO3YQ
  LV Write Access        read/write
  LV Creation host, time dragon.dsky, 2016-12-06 11:13:40 +0800
  LV Status              available
  # open                 2
  LV Size                2.00 GiB
  Current LE             512
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     8192
  Block device           253:1
   
  --- Logical volume ---
  LV Path                /dev/centos/root
  LV Name                root
  VG Name                centos
  LV UUID                dRtNvW-Tm7Q-gkzQ-2uhR-N6Gg-0I2V-6Bh9CM
  LV Write Access        read/write
  LV Creation host, time dragon.dsky, 2016-12-06 11:13:41 +0800
  LV Status              available
  # open                 1
  LV Size                97.46 GiB
  Current LE             24951
  Segments               2
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     8192
  Block device           253:0

创建新硬盘为物理卷

$ pvcreate /dev/sdb1

扩容逻辑卷组 - 加入新物理卷

$ vgextend centos /dev/sdb1

扩容逻辑卷

$ lvextend -L +50G /dev/mapper/centos-root

刷新逻辑卷大小

ext4 文件系统

$ resize2fs /dev/mapper/centos-root

xfs 文件系统

$ xfs_growfs /dev/mapper/centos-root