Some assumptions about setup
- Partition we are interested in resizing is
/dev/sda1 - System we are running is Debian 12
Make sure the drive is offline
Unmount
sudo umount -R /mntVerify nothing is using the drive or previous mount directory
sudo lsof /mnt
sudo lsof /dev/sda1Stop all docker containers
For my specific configuration, I was resizing a large drive that several docker containers are using as their data store, so I made sure to stop all of them (even though this is possibly extraneous).
I have ~/docker for all my docker-compose files, so it’s a simple for loop.
cd ~/docker
for dir in $(ls .); do cd $dir; sudo docker compose stop; cd ..; doneInstall necessary packages
We’ll be using growpart, resize2fs, and e2fsck. Both resize2fs and e2fsck were already installed on my system. To install growpart, run apt install cloud-guest-utils on Debian 12.
Resize the disk
sudo growpart /dev/sda 1 # NOTE THE SPACE between the drive letter and the number
sudo e2fsck -f /dev/sda1
sudo resize2fs /dev/sda1EOF