How to increase AWS EBS root partition for ext4 filesystems
Step1: Login to the AWS console and navigate to EC2 management console.
Step2: Select the required EBS volume and take a snapshot as the backup.
Step3: Modify the selected volume to the required size. Here in this example we are expanding an EBS having size 8G to 16G.
Step4: Connect to the EC2 instance as root via ssh.
Step5: Check the disk layout.
#lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT xvda 202:0 0 16G 0 disk └─xvda1 202:1 0 8G 0 part /
Here the root volume /dev/xvda, has a partition, /dev/xvda1. The current size of this partition is 8G and we can extent this to 16G.
Step6: Extend the partition.
#sudo growpart /dev/xvda 1
Step7: Check the disk layoyt again.
#lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT xvda 202:0 0 16G 0 disk └─xvda1 202:1 0 16G 0 part /
Step8: Verify the size of the file system.
#df -h Filesystem Size Used Avail Use% Mounted on /dev/xvda1 8.0G 1.9G 6.2G 24% /
Here it can be noticed that, we need to extend the filesystem.
Step9: Run the following command to extend the filesystem.
#sudo resize2fs /dev/xvda1
Step10: Verify the size of the filesystem.
#df -h Filesystem Size Used Avail Use% Mounted on /dev/xvda1 16G 1.9G 14G 12% /