Need advice /suggestion on improving KVM based vm's backup.

I have couple of Xeon Based Servers where we have implemented KVM based Virtualization using Ubuntu Server 16.04.2 ( LTS )

The performance and ease of operation is much better than Hyper-V and VMWare.

Kindly note that while implementing KVM we are not using LVM partitioning due to various reasons and we are relied on tried, tested ext4 formatted disks and any kind of raid. We wanted a simple and easy back up system.

However need advice on the following script meant for KVM VM Advice.

The Script is as follows. #!/bin/bash

Script written by Techganesh

This script is intended to run on srv1 [ 192.168.1.2 ]

The backup is intended on srv2 [192.168.1.3 ] in /srv1_vm_backup

The VM resides on srv1 in /vm directory

We want backup without shutting down VM

The script will run thru crontab job of root in midnight - once a day.

User Created files inside VM are backup thru other software

There is ample space on srv2

Ssh login to root without password is already implemented

Declared Variables for easy change

suspend='virsh suspend' resume='virsh resume' source_dir='/vm/' target_dir='/srv1_vm_backup' target_server='root@192.168.1.3' DAY=$(date +"%d%b%Y") sync='rsync -avzhe ssh' vm_on_run=/usr/bin/virsh list --all | grep running | awk {'print $2'} log_opt='--log-file' bkup_log='/var/log/kvm_vm/backup_log' ext='qcow2'

Find the VM Running

for vm in $vmlist do mytime=$(date +"%d-%b-%Y@%H:%M") $suspend $vm echo "Suspended $vm backup_purpose at $mytime "

    $sync  $source_dir/$vm.$ext $target_server:$target_dir/$vm.$ext $log_opt=$bkup_log/$vm.$ext_$DAY.log
    echo "Backed up $vm successfully ! Resuming ...$mytime"
    sleep 1
    $resume $vm
    sleep 1

done sleep 3 exit 0