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extend_vmware_lvm_disk [2016/02/12 13:42] (current)
The SuperUser created
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 +This is the process I've used to extend a LVM VMware disk.  I try to setup each mount point as it's own disk so it is easier to expand on demand.
 +
 +For example, you want to expand /bk from 500MB to 750MB.
 + 
 +Find out which volume group the mount point is on: 
 +<​code>​[[email protected] ~]# df -h /bk
 +Filesystem ​           Size  Used Avail Use% Mounted on
 +/​dev/​mapper/​vg_bkup-lv_bk
 +                      457M  2.3M  431M   1% /bk
 +</​code>​
 +The volume group is vg_bkup and the logical volume is lv_bk
 + 
 +Determine the disk:
 +<​code>​[[email protected] ~]# pvs
 +  PV         ​VG ​     Fmt  Attr PSize   PFree
 +  /​dev/​sdb ​  ​vg_root lvm2 a--   ​33.97g ​   0
 +  /​dev/​sdc ​  ​vg_temp lvm2 a--    6.97g    0
 +  /​dev/​sdd ​  ​vg_prog lvm2 a--    9.97g    0
 +  /​dev/​sde ​  ​vg_data lvm2 a--    4.00g    0
 +  /​dev/​sdf ​  ​vg_bkup lvm2 a--  480.00m ​   0
 +</​code>​
 +vg_bkup is on /dev/sdf
 + 
 +Determine the SCSI ID:
 +<​code>​
 +[[email protected] ~]# ll /​dev/​disk/​by-path/​
 +total 0
 +lrwxrwxrwx 1 root root  9 Jul  9 15:46 pci-0000:​00:​07.1-scsi-1:​0:​0:​0 -> ../../sr0
 +lrwxrwxrwx 1 root root  9 Jul  9 15:46 pci-0000:​03:​00.0-scsi-0:​0:​0:​0 -> ../../sda
 +lrwxrwxrwx 1 root root 10 Jul  9 15:46 pci-0000:​03:​00.0-scsi-0:​0:​0:​0-part1 -> ../../sda1
 +lrwxrwxrwx 1 root root  9 Jul  9 15:46 pci-0000:​03:​00.0-scsi-0:​0:​1:​0 -> ../../sdb
 +lrwxrwxrwx 1 root root  9 Jul  9 15:46 pci-0000:​03:​00.0-scsi-0:​0:​2:​0 -> ../../sdc
 +lrwxrwxrwx 1 root root  9 Jul  9 15:46 pci-0000:​03:​00.0-scsi-0:​0:​3:​0 -> ../../sdd
 +lrwxrwxrwx 1 root root  9 Jul  9 15:46 pci-0000:​03:​00.0-scsi-0:​0:​4:​0 -> ../../sde
 +lrwxrwxrwx 1 root root  9 Jul  9 15:46 pci-0000:​03:​00.0-scsi-0:​0:​5:​0 -> ../../sdf
 +</​code>​
 +You can look back from sdf and see that the the ID is 0:​0:​5:​0. ​ The important part is the two middle numbers - 0:5
 + 
 +Open vSphere Console and edit the settings for the machine. ​ By checking the Hard disks and looking under the Virtual Device Node, you should find the disk that matches those SCSI numbers - in this case, it is hard disk 6.  Update the drive size to add the required space and click OK.
 + 
 +Get Linux to rescan the drive (note the device in the middle):
 +<​code>​
 +echo '​1'​ > /​sys/​block/​sdf/​device/​rescan
 +</​code>​
 +Then expand the physical volume:
 +<​code>​
 +[[email protected] ~]# pvresize /dev/sdf
 +  Physical volume "/​dev/​sdf"​ changed
 +  1 physical volume(s) resized / 0 physical volume(s) not resized
 +</​code>​
 +Then look at the volume:
 +<​code>​
 +[[email protected] ~]# vgdisplay vg_bkup
 +  --- Volume group ---
 +  VG Name               ​vg_bkup
 +  System ID
 +  Format ​               lvm2
 +  Metadata Areas        1
 +  Metadata Sequence No  3
 +  VG Access ​            ​read/​write
 +  VG Status ​            ​resizable
 +  MAX LV                0
 +  Cur LV                1
 +  Open LV               1
 +  Max PV                0
 +  Cur PV                1
 +  Act PV                1
 +  VG Size               ​736.00 MiB
 +  PE Size               32.00 MiB
 +  Total PE              23
 +  Alloc PE / Size       15 / 480.00 MiB
 +  Free  PE / Size       8 / 256.00 MiB
 +  VG UUID               ​Z2l4Rd-kBJr-JaZd-uP5H-Rcg9-XfFM-CxW0Pm
 +</​code>​
 +You can see by the free PE / size that the volume now has potentially free space.
 + 
 +Add the space the the logical volume. ​ I spec this use the physical extents number as it is the most accurate:
 +<​code>​
 +[[email protected] ~]# lvextend -l +8 /​dev/​vg_bkup/​lv_bk
 +  Size of logical volume vg_bkup/​lv_bk changed from 480.00 MiB (15 extents) to 736.00 MiB (23 extents).
 +  Logical volume lv_bk successfully resized
 +</​code>​
 +
 +And then extend the filesystem
 +<​code>​
 +[[email protected] ~]# resize2fs /​dev/​vg_bkup/​lv_bk
 +resize2fs 1.41.12 (17-May-2010)
 +Filesystem at /​dev/​vg_bkup/​lv_bk is mounted on /bk; on-line resizing required
 +old desc_blocks = 2, new_desc_blocks = 3
 +Performing an on-line resize of /​dev/​vg_bkup/​lv_bk to 753664 (1k) blocks.
 +The filesystem on /​dev/​vg_bkup/​lv_bk is now 753664 blocks long.
 +</​code>​
 +And check the results:
 +<​code>​
 +[[email protected] ~]# df -h /bk
 +Filesystem ​           Size  Used Avail Use% Mounted on
 +/​dev/​mapper/​vg_bkup-lv_bk
 +                      705M  2.6M  666M   1% /bk
 +</​code>​
  
extend_vmware_lvm_disk.txt ยท Last modified: 2016/02/12 13:42 by The SuperUser