Difference between revisions of "Deleting Linux Swap Partition on KVM"

Revision as of 01:04, 26 July 2020

This page is in reference to the fact that cloud-init KVM templates cannot have any disk partition after the root "/" partition. In many cases, the Linux swap partition is after the root partition therefore it needs to be deleted as expected by cloud-init.

The root partition is important because cloud-init can grow the partition automatically from a template clone but only if it is the last partition on a disk.

Steps

Delete the swap line from /etc/fstab
Run swapoff -a
Use fdisk on the disk in question, this is usually /dev/sda fdisk /dev/sda
Execute the following commands in fdisk:
- p (get partition number of the Linux swap partition)
- d (delete the swap partition by number)
- d (delete any other system partition; there should only be 1 partition left for "/")
- w (write the new partition table)
Do one of the following to resize the file system to the maximum size:
- resize2fs /dev/sdaX where X is the number of the remaining partition
- growroot /dev/sda X where X is the number of the remaining partition
- If cloud-init is installed with growroot support, simply reboot

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-Coming soon
+This page is in reference to the fact that cloud-init KVM templates cannot have any disk partition after the root "/" partition. In many cases, the Linux swap partition is after the root partition therefore it needs to be deleted as expected by cloud-init.
+The root partition is important because cloud-init can grow the partition automatically from a template clone but only if it is the last partition on a disk.
+== Steps ==
+* Delete the <code>swap</code> line from /etc/fstab
+* Run <code>swapoff -a</code>
+* Use fdisk on the disk in question, this is usually /dev/sda <code>fdisk /dev/sda</code>
+* Execute the following commands in fdisk:
+** p (get partition number of the Linux swap partition)
+** d (delete the swap partition by number)
+** d (delete any other system partition; there should only be 1 partition left for "/")
+** w (write the new partition table)
+* Do one of the following to resize the file system to the maximum size:
+** <code>resize2fs /dev/sdaX</code> where X is the number of the remaining partition
+** <code>growroot /dev/sda X</code> where X is the number of the remaining partition
+** If cloud-init is installed with growroot support, simply <code>reboot</code>