Disk Configuration

You may have one of the following setups:

• Single disk setup: CloudRift will work out of the box, and the single disk will be used for both the OS and virtual machine storage. Proceed to Next Steps if this is your setup.
• Two-disk setup: One disk for the system and a second disk for VM allocation.
• Multiple disks setup: One system disk and multiple additional disks that will be configured in a RAID array for VM allocation.

Two-disk Setup

If you have two disks, you need to ensure that the second disk is properly mounted and formatted for CloudRift to use it for VM allocation.

0. Check the available disks

Run lsblk command to check available disks.

You should see something like this:

NAME                      MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS
nvme0n1                   259:0    0 447.1G  0 disk
├─nvme0n1p1               259:1    0     1G  0 part /boot/efi
├─nvme0n1p2               259:2    0     2G  0 part /boot
└─nvme0n1p3               259:3    0 444.1G  0 part
  └─ubuntu--vg-ubuntu--lv 252:0    0   100G  0 lvm  /
nvme2n1                   259:4    0   3.5T  0 disk

In this example, nvme0n1 is the system disk (with mountpoints) and nvme2n1 is the second disk without a mount point.

If your second disk already has a mount point, you can skip to Next Steps. Otherwise, continue with formatting and mounting.

1. Format the disk

Format the disk to EXT4 or your preferred filesystem.

sudo mkfs.ext4 /dev/nvme2n1

2. Mount the Disk

The mount point location is not important, but we recommend using /media/cloudrift so that you know what this disk is being used for.

sudo mkdir -p /media/cloudrift
sudo mount /dev/nvme2n1 /media/cloudrift

3. Persist the Mount on Reboot

Add to /etc/fstab:

sudo udevadm trigger
UUID=$(blkid -s UUID -o value /dev/nvme2n1)
echo "UUID=$UUID /media/cloudrift ext4 defaults,nofail,discard 0 0" | sudo tee -a /etc/fstab

5. Verify Everything Works

sudo mount -a
df -h /media/cloudrift

It is also a good idea to perform a reboot and check run aforementioned commands to check that your disks are persisted after the reboot.

Multiple Disks Setup

Multiple disks will be formatted into RAID0 array and used for VM allocation.

0. Check the available disks

Run lsblk command to check available disks.

You should see something like this:

NAME                      MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS
nvme0n1                   259:0    0 447.1G  0 disk
├─nvme0n1p1               259:1    0     1G  0 part /boot/efi
├─nvme0n1p2               259:2    0     2G  0 part /boot
└─nvme0n1p3               259:3    0 444.1G  0 part
  └─ubuntu--vg-ubuntu--lv 252:0    0   100G  0 lvm  /
nvme2n1                   259:4    0   3.5T  0 disk
nvme3n1                   259:5    0   3.5T  0 disk
nvme4n1                   259:6    0   3.5T  0 disk
nvme1n1                   259:7    0   3.5T  0 disk

1. Install mdadm

sudo apt update
sudo apt install -y mdadm

2. Create the RAID array

Run the following command to create a RAID0 array. Replace device names appropriately:

sudo mdadm --create --verbose /dev/md0 --level=0 \
    --raid-devices=4 /dev/nvme1n1 /dev/nvme2n1 /dev/nvme3n1 /dev/nvme4n1

3. Watch it build (should be fast for RAID 0)

cat /proc/mdstat

4. Create a filesystem

Format the array to EXT4 or your preferred filesystem.

sudo mkfs.ext4 /dev/md0

5. Mount the array

The mount point location is not important, but we recommend using /media/cloudrift so that you know what this disk is being used for.

sudo mkdir -p /media/cloudrift
sudo mount /dev/md0 /media/cloudrift

6. Persist on boot

Add to /etc/fstab:

sudo udevadm trigger
UUID=$(blkid -s UUID -o value /dev/md0)
echo "UUID=$UUID /media/cloudrift ext4 defaults,nofail,discard 0 0" | sudo tee -a /etc/fstab

7. Verify Everything Works

sudo mount -a
df -h /media/cloudrift

It is also a good idea to perform a reboot and check run aforementioned commands to check that your disks are persisted after the reboot.

Next Steps

To test the node configuration and make your nodes rentable, proceed to the Memory Configuration guide.