For C5 and M5 type instances, EBS volumes are exposed as NVMe block devices. The device names are /dev/nvme0n1, /dev/nvme1n1, and so on. The device name that you specify in a block device mapping are renamed using NVMe device naming convention (/dev/nvme[0-26]n1).

Here we offer a simple example to link your current volume name with this new naming

• We created a volume with the name /dev/xdvf but my volume now mounts on /dev/nvme[0-26]n1
• My volume name /dev/nvme[0-26]n1 is not identical between instances
• How we can retrieve the volume name to format and mount this
• How we can manage the discrepqncy between old and new instances

Terraform

Aws Account

Cloud-Init

terraform plan
terraform apply

Step 1: The machine is created

Step 2: Cloud-init installs nvme-cli

Step 3: Cloud-init runs a script to retrieve the volume name with tag /dev/(sd[b-z]|xvd[b-z]) and creates a temporary symbolic link ( removed after reboot )

Step 4: Cloud-init runs a script to retrieve the UUID from the new symlink, formats, mounts and adds to fstab by UUID

Your environment is ready

You can contribute or implement your own things.

MIT