To resize a virtual drive - Revision history

Benrwong at 18:49, 5 October 2016

2016-10-05T18:49:19Z

← Older revision		Revision as of 18:49, 5 October 2016
Line 21:		Line 21:
	virsh start myvm		virsh start myvm
	9) Cross fingers		9) Cross fingers
			There may be a permissions problem that causes the following error message upon starting the resized VM

			[root@tet qemu]# virsh start tau
			error: Failed to start domain tau
			error: internal error Process exited while reading console log output: 2016-10-05T16:12:09.032816Z qemu-kvm: -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/tau.monitor,server,nowait: socket bind failed: Permission denied
			2016-10-05T16:12:09.033101Z qemu-kvm: -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/tau.monitor,server,nowait: chardev: opening backend "socket" failed

			To address this, change /var/lib/libvirt/qemu to be owned by qemu and under qemu group.

	10) If all is OK, clear out old and temporary disks		10) If all is OK, clear out old and temporary disks

Benrwong: /* Alternative Resize method */

2016-09-22T18:57:31Z

Alternative Resize method

← Older revision		Revision as of 18:57, 22 September 2016
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	===Alternative Resize method===		===Alternative Resize method===
	This method is for resizing a VM's image file directly.		This method is for resizing a VM's image file directly. It only works on certain image files. <br />
	1) Shutdown the vm		1) Shutdown the vm
	virsh shutdown <vm-name>		virsh shutdown <vm-name>

Benrwong at 21:21, 20 September 2016

2016-09-20T21:21:55Z

← Older revision		Revision as of 21:21, 20 September 2016
Line 26:		Line 26:
	rm myvm-disk1~original		rm myvm-disk1~original

			===Alternative Resize method===
			This method is for resizing a VM's image file directly.
			1) Shutdown the vm
			virsh shutdown <vm-name>

			2) Find the VM's image file on the hypervisor (Typically somewhere under /var/lib/libvirt/images)

			3) Apply an image resize:
			qemu-img resize <vm-disk-image> <+/- amount of HDD space to add/subtract>

			4) Start VM and re-partition once it is on.

	[[Category:Sysadmin]]		[[Category:Sysadmin]]

Frodo at 14:03, 23 May 2014

2014-05-23T14:03:41Z

← Older revision		Revision as of 14:03, 23 May 2014
Line 21:		Line 21:
	virsh start myvm		virsh start myvm
	9) Cross fingers		9) Cross fingers

	10) If all is OK, clear out old and temporary disks		10) If all is OK, clear out old and temporary disks
	rm myvm-disk1~postresize		rm myvm-disk1~postresize

Frodo at 14:03, 23 May 2014

2014-05-23T14:03:30Z

← Older revision		Revision as of 14:03, 23 May 2014
Line 1:		Line 1:
	Resizing a virtual drive (machine must be off):		Resizing a virtual drive (machine must be off):
			0) Read man page
	man virt-resize		man virt-resize
	0) Be extra safe and make a copy of the disk		1) Shut Machine down
	cp ~~alpha~~-~~root alpha~~-~~root~~~preresize		virsh shutdown myvm
	1) Examine virtual drive's structure		2) Be extra safe and make a copy of the disk (space permitting)
	virt-filesystems --long -h --all -a ~~alpha~~-~~root~~~preresize		cp myvm-disk1 myvm-disk1~preresize
	2) Create new drive (this uses the QCOW2 format. Multiple options available)		3) Examine virtual drive's structure
	qemu-img create -f qcow2 -o preallocation=metadata ~~alpha~~-~~root~~~postresize 15G		virt-filesystems --long -h --all -a myvm-disk1~preresize
	3) Use vm resize command to populate new disk with expanded partitions (and also expand LVM if applicable)		4) Create new drive (this uses the QCOW2 format. Multiple options available)
	virt-resize --expand /dev/sda2 --lv-expand /dev/~~vg_alpha~~/root_lv ~~alpha~~-~~root~~~preresize ~~alpha~~-~~root~~~postresize		qemu-img create -f qcow2 -o preallocation=metadata myvm-disk1~postresize 15G
	4) To expand more than 1 LVM partition, repeat the process		5) Use vm resize command to populate new disk with expanded partitions (and also expand LVM if applicable)
	qemu-img create -f qcow2 -o preallocation=metadata ~~alpha~~-~~root~~~postresize2 25G		virt-resize --expand /dev/sda2 --lv-expand /dev/vg_myvm/root_lv myvm-disk1~preresize myvm-disk1~postresize
	virt-resize --expand /dev/sda2 --lv-expand /dev/~~vg_alpha~~/var_lv ~~alpha~~-~~root~~~postresize ~~alpha~~-~~root~~~postresize2		6) To expand more than 1 LVM partition, repeat the process
	5) Swap file names around		qemu-img create -f qcow2 -o preallocation=metadata myvm-disk1~postresize2 25G
	mv ~~alpha~~-~~root alpha~~-~~root~~~original		virt-resize --expand /dev/sda2 --lv-expand /dev/vg_myvm/var_lv myvm-disk1~postresize myvm-disk1~postresize2
	mv ~~alpha~~-~~root~~~postresize2 ~~alpha~~-~~root~~		7) Swap file names around
	6) Start virtual machine		mv myvm-disk1 myvm-disk1~original
	virsh start ~~alpha~~		mv myvm-disk1~postresize2 myvm-disk1
	7) Cross fingers		8) Start virtual machine
			virsh start myvm
			9) Cross fingers
			10) If all is OK, clear out old and temporary disks
			rm myvm-disk1~postresize
			rm myvm-disk1~original

	[[Category:Sysadmin]]		[[Category:Sysadmin]]

Frodo: Created page with "Resizing a virtual drive (machine must be off): man virt-resize 0) Be extra safe and make a copy of the disk cp alpha-root alpha-root~preresize 1) Examine virtual drive's st..."

2014-05-23T13:58:19Z

Created page with "Resizing a virtual drive (machine must be off): man virt-resize 0) Be extra safe and make a copy of the disk cp alpha-root alpha-root~preresize 1) Examine virtual drive's st..."

New page

Resizing a virtual drive (machine must be off):
man virt-resize
0) Be extra safe and make a copy of the disk
cp alpha-root alpha-root~preresize
1) Examine virtual drive's structure
virt-filesystems --long -h --all -a alpha-root~preresize
2) Create new drive (this uses the QCOW2 format. Multiple options available)
qemu-img create -f qcow2 -o preallocation=metadata alpha-root~postresize 15G
3) Use vm resize command to populate new disk with expanded partitions (and also expand LVM if applicable)
virt-resize --expand /dev/sda2 --lv-expand /dev/vg_alpha/root_lv alpha-root~preresize alpha-root~postresize
4) To expand more than 1 LVM partition, repeat the process
qemu-img create -f qcow2 -o preallocation=metadata alpha-root~postresize2 25G
virt-resize --expand /dev/sda2 --lv-expand /dev/vg_alpha/var_lv alpha-root~postresize alpha-root~postresize2
5) Swap file names around
mv alpha-root alpha-root~original
mv alpha-root~postresize2 alpha-root
6) Start virtual machine
virsh start alpha
7) Cross fingers

[[Category:Sysadmin]]