Expand Disk Size (VMware)

The database volume is an LVM device. You can resize it online by provided the underlying virtualization technology supports online disk expansion.

To expand the disk size:

1. Login into the VCO system console.
2. Identify the physical disks backing the database volume.

   vgs -o +devices db_data

   Example:

   root@vco:~# vgs -o +devices db_data
      \  VG      #PV #LV #SN Attr   VSize   VFree   Devices
        db_data   1   1   0 wz--n- 500.00g 125.00g /dev/sdb(0)

3. Identify the physical disk attachment.

   lshw -class volume

   Example:

   /dev/sdb is attached to scsi@2:0.1.0 (Host: scsi2 Channel: 00 Id: 01 Lun: 00)

   root@vco:~# lshw -class volume
     *-volume
          description: EXT4 volume
          vendor: Linux
          physical id: 1
          bus info: scsi@2:0.0.0,1
          logical name: /dev/sda1
          logical name: /
          version: 1.0
          serial: 9d212247-77c4-4f98-a5c2-7f8470fa2da8
          size: 10239MiB
          capacity: 10239MiB
          capabilities: primary bootable journaled extended_attributes large_files huge_files dir_nlink recover extents ext4 ext2 initialized 
          configuration: created=2016-02-22 20:49:38 filesystem=ext4 label=cloudimg-rootfs lastmountpoint=/ modified=2016-02-22 21:18:58 mount.fstype=ext4 mount.options=rw,relatime,data=ordered mounted=2016-10-06 23:22:04 state=mounted 
     *-disk:1
          description: SCSI Disk
          physical id: 0.1.0
          bus info: scsi@2:0.1.0
          logical name: /dev/sdb
          serial: v5V2zm-Lvbh-Mfx3-W8ki-COI9-DAtP-RXndhu
          size: 500GiB
          capacity: 500GiB
          capabilities: lvm2
          configuration: sectorsize=512
     *-disk:2
          description: SCSI Disk
          physical id: 0.2.0
          bus info: scsi@2:0.2.0
          logical name: /dev/sdc
          serial: fTQFJ2-giAV-WsXL-1Wha-V305-oQkV-qqS3SA
          size: 100GiB
          capacity: 100GiB
          capabilities: lvm2
          configuration: sectorsize=512

4. On the hypervisor host, locate the disk attached to the VM using bus info. Example: SCSI(0:1)
5. Extend the virtual disk. For instructions, see VMWare KB article 1004047: http://kb.vmware.com/kb/1004047
6. Log back into the VCO system console.
7. Re-scan the block device for the resized physical volume. Example:

   echo 1 > /sys/block/$DEVICE/device/rescan

   Example:

   echo 1 > /sys/block/sdb/device/rescan

8. Resize the LVM physical disk.

   pvresize /dev/sdb

9. Determine the amount of free space in the database volume group.

   vgdisplay db_data |grep Free

   Example:

   root@vco:~# vgdisplay db_data |grep Free
   Free  PE / Size       34560 / 135.00 GiB

10. Extend the database logical volume.

    lvextend -L+#G /dev/db_data/vco

    Example:

    root@vco:~# lvextend -L+10G /dev/db_data/vco
      Extending logical volume vco to 385.00 GiB
      Logical volume vco successfully resized

11. Resize the database volume filesystem:

    resize2fs /dev/db_data/vco

    Example:

    root@vco:~# resize2fs /dev/db_data/vco
    resize2fs 1.42.9 (4-Feb-2014)
    Filesystem at /dev/db_data/vco is mounted on /store; on-line resizing required
    old_desc_blocks = 24, new_desc_blocks = 25
    The filesystem on /dev/db_data/vco is now 100924416 blocks long.

12. See the new size of the volume.

    df -h /dev/db_data/vco

    Example:

    root@vco:~# df -h /dev/db_data/vco
    Filesystem               Size  Used Avail Use% Mounted on
    /dev/mapper/db_data-vco  379G  1.2G  359G   1% /store