How to increase capacity of open stack hypervisor local disks

I configured an open stack with devstack this time, but I think there will be a shortage of local storage, so I'm going to add it. So we have a 2TB hard drive that is composed of raid, so we're going to add it to the open stack, do you know how to do it?

If you are talking about ephemeral storage, I believe Devstack puts that on /opt/stack/data/nova/instances (you may want to double-check that on your system). You would have to mount your disk there.

You may want to consider putting the entire /opt/stack onto the disk, since other large storage consumers such as Cinder and Swift would then have lots of space as well.

I am a bit worried. What are your plans with this Devstack? Note that Devstack is suitable for testing, experimenting and learning, but nothing else. Among other problems, a Devstack cloud can't be rebooted without manual intervention.

EDIT:

I would try it as follows:

• delete all instances
• stop Nova, e.g. systemctl stop devstack@n-*
• mount the hard drive somewhere, for example on /mnt/2tb
• copy /opt/stack/data/nova to the drive, e.g. cd /opt/stack/data/nova; find . | cpio -pdumva /mnt/2tb
• mount the 2TB drive on /opt/stack/data/nova

The first two steps are precautions against copying inconsistent data.

Better, reinstall that server, mount the 2TB drive on /opt, then rebuild the Devstack.

Note that only works if your instances use ephemeral storage. If they use volumes, you need to copy Cinder data instead of Nova.