Part 1. AWS Console
Navigate to ec2 → ebs volume → volume that needs modification.
Click Modify Volume and change size to desired one and wait until it’s finished.
Part 2. Modify volume inside ec2 instance
Instructions can also be found here.
Basically use lsblk to check if partition uses the whole device size
$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
xvda 202:0 0 16G 0 disk
└─xvda1 202:1 0 8G 0 part
if not, (like above) use sudo growpart /dev/xvda 1 (arguments match partition/device) so that partition can be expanded to device size.
Then using df -h you might still see that os doesn’t see above change. At this point use something like sudo resize2fs /dev/xvda1
After resize2fs, check again df -h command, result should show the new volume size.
HINT: If root disk space has ran out and you are trying to resize, growpart command might not work due to lack of disk space, at this point, simply delete something with no value just to give shell some space to run the command.