How to extend a volume

Estimated time to read: 1 minute

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

Prerequisites:

• A Fuga Cloud account
• OpenStack CLI tools installed

Step 1: Get the volume

Using the CLI tools

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

Step 2: Extend (bootable) volume

We will now extend our volume to 20 GB.

Using the CLI tools

Replace the <volume-id> with that of your own.

Note

The volume must be detached from an instance or you have to add the following: --os-volume-api-version 3.43

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

Step 3: Stop and restart

Using the CLI tools

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.