Increasing node root partition size

Increasing the size of the root EBS block, used for the root file-system, can be done relatively quickly and without requiring a reboot.

1. Increase the aws_root_block_size (GB) for each node in terraform/env/prod/main.tf
2. Commit and push to main branch. This will trigger terraform to perform the disk expansion via the CI pipeline.
   • You could also manually run terraform apply on terraform/env/prod/; just be sure to commit and push afterwards.
3. On each node:
   • Expand the partition table. This can be done via:

     parted --list
     # When prompted to Fix/Ignore, choose fix
     Warning: Not all of the space available to /dev/nvme0n1 appears to be used, you
     can fix the GPT to use all of the space (an extra 402653184 blocks) or continue
     with the current setting?
     Fix/Ignore? fix
     

   • Expand the root partition (typically partition 1; see output of previous command):

     parted /dev/nvme0n1
     # Will take you to parted prompt
     (parted) resizepart
     Partition number? 1
     Warning: Partition /dev/nvme0n1p1 is being used. Are you sure you want to continue?
     Yes/No? yes
     End?  [68.7GB]? 100%
     (parted) quit
     

   • Expand the ext4 file-system to use 100% of the partition (default action for resize2fs):

     resize2fs /dev/nvme0n1p1
     

At this point the file-system should be expanded. Verify via df -h.