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How to extend a bootable volume using Openstack CLI

Introduction

In this tutorial, we will show you how to increase the size of your (bootable) volume.

Prerequisites:

STEP 1: Volume ID

In order to extend the volume storage, we need to know the volume ID. You can look it up using the following command.

$ openstack volume list

Fuga Cloud account

STEP 2: Extend (bootable) volume

Now, let’s extend our volume to 20 GB. Replace the <volume-id> with that of your own.

note: The volume must be detached from an instance.

$ openstack volume set <volume-id> --size 20

STEP 3: Stop and restart

To let your instance know that you have more disk space available on your volume, you have to shut down the machine and start it again, a restart will not do it.

$ openstack server stop <server-name>
$ openstack server start <server-name>

That's it, to confirm that your operating system sees the new volume size you can log in using SSH and use the list block device command:

$ lsblk

Conclusion

You have now extended the bootable volume of your instance using the OpenStack CLI tools.