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I have a server running the recent Ubuntu AMIs from Canonical. The size of the EBS boot volume is 8GB. I know that I can resize EBS volumes by taking a snapshot, creating a new volume and expanding the partition on it. How can I increase the size of the volume while the machine is running? If this is not possible, what is the preferred method for increasing the boot volume size with minimal downtime?
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With Amazon EBS Elastic Volumes, you can increase the volume size, change the volume type, or adjust the performance of your EBS volumes. If your instance supports Elastic Volumes, you can do so without detaching the volume or restarting the instance.
With Elastic Volumes, you can dynamically increase the size, increase or decrease the performance, and change the volume type of your Amazon EBS volumes without detaching them.
We can increase the volume size with the new EBS Feature Elastic volumes, post that we need to follow the following steps to use the increase size as shown here
Assume your volume was 16G and you increased it to 32GB.
$lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT xvda 202:0 0 32G 0 disk └─xvda1 202:1 0 16G 0 part / To extend xvda1 from 16GB t0 32GB, we need growpart. growpart is available as part of cloudutils
sudo apt install cloud-utils Post installation of cloud-utils, execute the growpart command
sudo growpart /dev/xvda 1 Now lsblk, will show
$ lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT xvda 202:0 0 32G 0 disk └─xvda1 202:1 0 32G 0 part / but df -h will show only 16GB
Final command for extending xvda1 to 32GB is
sudo resize2fs /dev/xvda1 In case of XFS file system,
sudo xfs_growfs /dev/xvda1 Thanks egg
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