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Resizing an EBS volume
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resize-aws-ebs.md

Resizing an EBS volume

AWS lets you resize EBS volume without downtime. Here are the steps:

  • Change the size of disk via AWS Console Web UI
  • Login to the EC2 machine
  • Extending the partition
$ lsblk
NAME    MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
xvda    202:0    0  16G  0 disk
└─xvda1 202:1    0   8G  0 part /

$ sudo growpart /dev/xvda 1
CHANGED: partition=1 start=2048 old: size=16775135 end=16777183 new: size=33552351,end=33554399

$ lsblk
NAME    MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
xvda    202:0    0  16G  0 disk
└─xvda1 202:1    0  16G  0 part /
  • Extending the File System
$ df -h
Filesystem      Size  Used Avail Use% Mounted on
...
/dev/xvda1      7.7G  6.9G  861M  90% /
...

$ sudo resize2fs /dev/xvda1
resize2fs 1.42.13 (17-May-2015)
Filesystem at /dev/xvda1 is mounted on /; on-line resizing required
old_desc_blocks = 1, new_desc_blocks = 1
The filesystem on /dev/xvda1 is now 4194043 (4k) blocks long.

$ df -h
Filesystem      Size  Used Avail Use% Mounted on
...
/dev/xvda1       16G  6.9G  8.6G  45% /
...
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