Here’s how to extend an ext4 boot volume.
gcloud compute disks resize DISK_NAME --size DISK_SIZE --zone ZONE --project PROJECTID |
Resize the file system. Example / is on sda3.
growpart /dev/sda 3 resize2fs /dev/sda3 |
extend
Resizing XFS root partition in GCP
How to resize a root partition in GCP.
Increase disk size.
gcloud compute disks resize server-boot-disk-name \ --size=50GB \ --zone us-central1-c \ --project your-project-id |
Run growpart.
growpart /dev/sda 1 |
Run xfs_growfs.
xfs_growfs /dev/sda1 |
To verify, run these.
lsblk df -Th |
LVM Extend Physical Volume
The following are instructions on how to extend a disk volume with LVM.
# aws cli extend volume aws ec2 modify-volume --region us-east-1 \ --volume-id vol-xxxxxxxxxxxx --size 15 \ --volume-type gp2 # check volumes before lsblk # extend via growpart growpart /dev/xvdf 1 # check volumes after lsblk # resize physical volume pvresize /dev/xvdf1 # check physical volume pvscan # extend logical volume lvresize -l +100%FREE /dev/data/data # check logical volume lvscan # check mounts df -Th # resize file system resize2fs /dev/data/data # or xfs_growfs /dev/mapper/root xfs_growfs /dev/xvda1 # check mounts again for new size df -Th |
Extend Linux Boot
The following commands will extend Linux Boot drive without a reboot.
List block devices. Check disk sizes.
lsblk df -h |
Determine file system type: xfs, ext2, ext3 or ext4.
file -s /dev/xvda1 # or df -Th |
Extend volume from the console or command line.
aws ec2 modify-volume --region us-east-1 \ --volume-id vol-xxxxxxxxxxxx --size 10 \ --volume-type gp2 |
Resize Linux partition.
# for /dev/xvda1 growpart /dev/xvda 1 # for /dev/xvda2 growpart /dev/xvda 2 # for ext2, ext3, ext4 resize2fs /dev/xvda1 # for xfs xfs_growfs /dev/mapper/root xfs_growfs /dev/xvda1 |
Check if new file size is being displayed.
lsblk df -Th |
Extend LVM volume
Extending a LVM logical volume can be tricky. Extending a physical volume especially a boot drive is even more challenging. To make things simple, you can just easily add a new physical disk to your physical volume group. Here are the steps:
# add disk to your instance. fdisk /dev/sdh pvcreate /dev/sdh1 vgextend system /dev/sdh1 lvextend -l +100%FREE /dev/system/opt resize2fs /dev/system/opt |
The fdisk command requires a few steps inside such as creating a new partition, changing the partition to type to “8e” which is Linux LVM, and then writing your changes to disk.
The rest are pretty much self explanatory. It’s about creating a physical volume, extending the volume group, extending the logical volume, and then finally resizing the file system.
Extend an EBS Volume
As a Cloud Engineer, I get a few requests to extend an EBS volume. For example, the application owner wants to double the size of the /data volume from 10GB to 20GB. The nice part about extending an EBS volume is that it can all be done on the fly without bringing down the instance. Adding more storage can be done via the AWS Console. Check out this article from AWS about modifying an EBS volume. But that’s just the first part. Although you’ve doubled the disk space, you still have to let the system know it now has doubled it’s disk space. The second part is to grow or resize the file system. Here’s the other article on how to extend a file system.
# expand growpart /dev/xvdb # for ext2, ext3 and ext4 resize2fs /dev/xvdb # for xfs xfs_growfs -d /dev/xvdb |