Increase root volume size in AWS
August 20, 2020 Leave a comment
1. Increase disk size from AWS console:
Volumes -> choose disk -> Actions -> Modify Volume -> enter new value in Size field:
2. Use the lsblk command to display information about the block devices attached to your instance:
# lsblk
..
nvme0n1 259:11 0 40G 0 disk
└─nvme0n1p1 259:12 0 35G 0 part /
The root volume, /dev/nvme0n1, has a partition, /dev/nvme0n1p1. While the size of the root volume reflects the new size, 40 GB, the size of the partition reflects the original size, 35 GB, and must be extended before you can extend the file system.
3. To extend the partition on the root volume, use the following growpart command:
# growpart /dev/nvme0n1 1
CHANGED: partition=1 start=2048 old: size=73398239 end=73400287 new: size=83883999 end=83886047
4. Verify new size:
# lsblk
..
nvme0n1 259:11 0 40G 0 disk
└─nvme0n1p1 259:12 0 40G 0 part /
5. Use the df -Th command to verify the size of the file system for root volume:
# df -Th /
Filesystem Type Size Used Avail Use% Mounted on
/dev/nvme0n1p1 xfs 35G 4.2G 31G 12% /
6. From the above output, we see that filesystem is XFS, grow it using xfs_growfs
# xfs_growfs -d /
meta-data=/dev/nvme0n1p1 isize=256 agcount=36, agsize=262080 blks
= sectsz=512 attr=2, projid32bit=1
= crc=0 finobt=0 spinodes=0 rmapbt=0
= reflink=0
data = bsize=4096 blocks=9174779, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal bsize=4096 blocks=2560, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 9174779 to 10485499
If filesystem is ext2, ext3, or ext4, you should use resize2fs.
7. Check new size:
# df -Th /
Filesystem Type Size Used Avail Use% Mounted on
/dev/nvme0n1p1 xfs 40G 4.2G 36G 11% /
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