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• SSH into the CentOS OVA and sudo to root (unless you are already root)

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  language bash theme Emacs
  sudo su -

List the block device to see the newly assigned vSphere hard disk.

lsblk

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If you do not see the vSphere hard disk, force a rescan

for host in $(ls -1d /sys/class/scsi_host/*); do echo "- - -" > ${host}/scan ; done
for device in $(ls -1d /sys/class/scsi_disk/*); do echo "1" > ${device}/device/rescan ; done

create a new Partition that is compatible to LVM

• Format the disk partition. Get the device name from the previous lsblk output

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  language bash theme Emacs
  fdisk /dev/sdb n (new partition) p (primary) (Press ENTER) (Use default partition number) (Press ENTER) (Use default first sector) (Press ENTER) (Use default last sector) t (change the partition type) 8e (Linux LVM) w (write)

Create the Physical Volume for LVM

and check afterwards with pvs
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Extend the Volumegroup (vg).

first check for the group with "vgs" then "vgextend centos" then check again:
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now extend the Logival Volume (lv)

first check for the Volume with "vgs" then "lvextend" then check again:
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resize filesystem

now in order to actually use the additional space we need to resize the filesystem.
first check the existing file system
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then actually resize  the file system
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and check again:
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Voila!

In essence

1. Increase Diskspace (physically or on the Hypervisor Layer)
2. Reboot or rescan for disks
3. create a new Partition that is compatible to LVM
4. re-read Partition table either via reboot or command "partprobe"
5. Initialise a new PV with pvcreate
6. Increase  the VG with vgextend
7. Increase  the LV with lvextend
8. Increase the Filesystem with resize2fs

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