Add a new virtual volume to an LVM partition of a virtual VMWare system running a RedHat type Operating System

lvm

 

 

  • Add a new drive to your virtual machine using the graphical VMware tool, currently VMware vSphere
  • Reboot the virtual machine so the new drive can be seen by the host Operating System
  • Launch the command vgdisplay as root in order to get the name of your LVM virtual group:

> vgdisplay
— Volume group —
VG Name               myvg
System ID
Format                lvm2
Metadata Areas        5
Metadata Sequence No  10
VG Access             read/write
VG Status             resizable
…etc

  • Use the command pvdisplay (i.e. “physical volume display”) as root in order to get the device name (/dev/sdx) of your new drive. You are looking for an entry that shows “Allocatable  no”
  • Add the new device to the volume group:
    vgextend myvg /dev/sdx
  • Get the location (LV Path) of your logical volume using lvdisplay (i.e. “logical volume display”)> lvdisplay
    — Logical volume —
      LV Path                /dev/myvg/rootvol
    …etc
  • Resize the logical volume, adding the size of the new drive (in this example 30 gigabytes):
    lvresize -L +30G /dev/myvg/rootvol
  • Resize the partition of the logical volume. Resize2fs is able to detect the system is live and is able to apply the correct change, even on the root partition:
    resize2fs /dev/myvg/rootvol
  • Optionally reboot the virtual machine, just to make sure all is fine
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