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If you have added extra storage volumes to your instance, you may want to expand it.

Change the volume size

On Morpheus under the tab Provisioning → Instances, select the corresponding VM and select under Actions → Reconfigure.


This action will reboot the VM - make sure you're ready for this!


In the pop up menu, change the volume size to the new value and press reconfigure.

Once the VM is back to status "running", you can login to your VM. There, you will find that the disk space has not changed.  However, this is as if you'd put a new larger hard disk into the machine and cloned the existing filesystem onto it.  To make use of the new disk space, you need to do some more steps - in short, you need to expand the partition and filesystem to fill the new space.

Extend a partition

These steps can result in data loss if a mistake is made - make sure you have backups of anything important

When following these steps, if anything looks significantly different to the instructions or you're uncertain, it's best to stop and contact support!


In order to use the new volume, there are several possibilities, e.g. create a new partition for the newly created disk space. Here, we show how to extend an existing partition on the disk to use the added volume.

In this example, we have a 10 GB partition, which we want to increase to 20 GB having completed the above volume change on morpheus.

Running

df -h

should show the previous size of the mounted partition, with output like

Filesystem Size Used Avail Use% Mounted on
udev 3.9G 0 3.9G 0% /dev
tmpfs 798M 760K 797M 1% /run
/dev/vda1 15G 11G 3.7G 75% /
tmpfs 3.9G 0 3.9G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
/dev/vda15 105M 8.9M 96M 9% /boot/efi
/dev/vdb1 9.8G 3.1G 6.3G 33% /data-1
tmpfs 798M 0 798M 0% /run/user/352200006

Where /dev/vdb1 is the partition which we want to increase.

  1. Check if the command line tool parted is installed, e.g. call parted --help

  2. Make sure you have sudo rights on the VM
  3. If you just execute parted, you will land on the parted console, which you can exit typing quit.
  4. Unmount the disk 

    sudo umount /dev/vdb1

  5. Launch parted as superuser 

    sudo parted

  6. Type the command `print all` which should show information about the partitions
    (parted) print all
Model: Virtio Block Device (virtblk)
Disk /dev/vdb: 21.5GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:

Number Start End Size Type File system Flags
1 1049kB 10.7GB 10.7GB primary ext4


Model: Virtio Block Device (virtblk)
Disk /dev/vda: 16.1GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:

Number Start End Size File system Name Flags
14 1049kB 5243kB 4194kB bios_grub
15 5243kB 116MB 111MB fat32 boot, esp
1 116MB 16.1GB 16.0GB ext4
    Which shows, that the volume has been extended to the desired size, but the partition is not using it entirely.
  7. Select the disk you want to extend typing

    (parted) select /dev/vdb

    The command print should now show only information on this disk.
  8. Now, type the command resizepart and give the relevant answers. In this example: 
    (parted) resizepart
Partition number? 1
Warning: Partition /dev/vdb1 is being used. Are you sure you want to continue?
Yes/No? Yes
End? [10.7GB]? 100%
  9. Now, print should show that the partition is using the entire disk space.
  10. Type `quit` to exit the parted console.

Extend the filesystem

As the last step, we still need to tell the filesystem to use the entire partition. This can be done using the command resize2fs. In this example:

sudo resize2fs /dev/vdb1

Remount the partition with

sudo mount /dev/vdb1

or

sudo mount -a

and you are done.

To confirm your reconfiguration, run 

df -h

which should show the increased size, see the increased value of /dev/vdb1 in this example:

Filesystem      Size  Used Avail Use% Mounted on
udev            3.9G     0  3.9G   0% /dev
tmpfs           798M  764K  797M   1% /run
/dev/vda1        15G   11G  3.7G  75% /
tmpfs           3.9G     0  3.9G   0% /dev/shm
tmpfs           5.0M     0  5.0M   0% /run/lock
tmpfs           3.9G     0  3.9G   0% /sys/fs/cgroup
/dev/vda15      105M  8.9M   96M   9% /boot/efi
tmpfs           798M     0  798M   0% /run/user/352200006
/dev/vdb1        20G  3.1G   16G  17% /data-1

Which has changed from 9.8G to 20G.

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