Hi all, I want to configure backups for live VMs without interupting VMs, I googled that only possible way is to do it with Qemu Agent on VM and --quiesce --atomic options. Unfortunately I am not able to do so : virsh snapshot-create-as --domain one-53 tempsnap “Temporary snapshot used while back…

I just found that fsfreeze is not working when docker is installed on VM. When docker is running mount command looks like… sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime) proc on /proc type proc (rw,nosuid,nodev,noexec,relatime) udev on /dev type devtmpfs (rw,nosuid,relatime,size=101…

[image] Snowman: Are you familliar with next error ? error: internal error: unable to execute QEMU command ‘transaction’: Could not create file: Permission denied As it is executed on the hypervizor, it looks like qemu-kvm has no rights to write (I am guessing) the snapshot file or some trans…

Yes its on hypervisor, but i am executing virsh as root. Can you be more specific in order to describe what is snapshot file or transient lockfile ? Dunno what steps I should have to make to fix this. I am running gluster as /tank/volume1, maybe its related to that. Related to previous error I also…

Second error is caused by dynamic_ownership=0 setting in /etc/libvirt/qemu.conf ? Can someone confirm this setting is required for opennebula ? When I touch snapshot file and chown this file as oneadmin, virsh snapshot command works as intended. I have Opennebula 5 but there is dynamic_ownership=0…

hello, would you share your backup script? thanks

I don’t have one, i am only testing if my approach is possible and OK. later I can share it, but for now it’s only manual commands.

Hi @feldsam , did you managed how to backup VMs online without downtime with Opennebula ? Can you share some ideas ? I did not found any suitable solution thought. :frowning: BR

Hi @Snowman , yes I written backup script in nodejs using opennebula xml rpc api and ssh. principialy I use external snapshot, backup, blockkcommit like is in this official article http://wiki.libvirt.org/page/Live-disk-backup-with-active-blockcommit

Is there any interuption (freeze) of service like ping or SSH while external snapshot is creating or when blockcommit is in place ? Thanks.

Hi, I don’t see any interruption

Backup live VMs with snapshots (--quiesce --atomic)

Product Support

feldsam (Kristian Feldsam) December 3, 2017, 12:15am 22

Hi all, I just released my script Contribution: OpenNebula backup script for QCOW2 datastores

Topic		Replies	Views
Contribution: OpenNebula backup script for QCOW2 datastores Integration Support	38	4880	April 2, 2024
Does backup job FS_FREEZE AGENT actually freeze the file system? Product Support	9	126	September 10, 2026
Feature Request : VM Backup & Disk resize Integration Support	5	4588	December 3, 2017
KVM/Qcow2 snapshots questions Product Support	3	2759	October 9, 2021
Backup Opennebula VMs Integration Support	7	5675	June 29, 2018

Backup live VMs with snapshots (--quiesce --atomic)

Related topics