Create backup of oVirt / RHEV’s VMs

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Introduction

I've been working with oVirt since version 3.5 as main virtualization platform, from day one i were looking for a tool to create VM backups based on snapshot as many solutions does with VMWARE, after some research i didn't find a tool that fulfilled my requirements so i decided to create one using oVirt python API.

Requirements

oVirt >= 4.0
Virtual machine with CentOS 7 with this tools installed, we'll call this VM bkpvm
bkpvm should be on the same oVirt Datacenter of the VM we need to take backup of
bkpvm should have enought space to store backups
Storage Domain should have enought space to take snapshots

How does it work?

This script should run on bkpvm and it connect to oVirt API to do:

Create snapshot
Attach disk to bkpvm
Create a qcow2 file of the VM's disk
Delete snapshot

After finish it creates a qcow2 file for each VM's disk

Instalation

Prerequisites

Install required repositories on bkpvm:

yum install -y epel-release
yum install -y http://resources.ovirt.org/pub/yum-repo/ovirt-release43.rpm

Install required packages from repositories configured:

yum install -y qemu-img python-ovirt-engine-sdk4 python-requests git ovirt-guest-agent

Download

cd /opt
git clone https://github.com/vacosta94/VirtBKP.git

We need to get our oVirt's CA in order to establish secure connections to oVirt API

cd /opt/VirtBKP
curl --insecure "https://ovirt.infratic.com/ovirt-engine/services/pki-resource?resource=ca-certificate&format=X509-PEM-CA" -o ca.crt

Usage

Configure

There is a configuration file default.conf inside VirtBKP folder, that file have all the parameters required by the tool. Should modify this file according your environment as follow:

vim /opt/VirtBKP/default.conf

[bkp]
url		= https://ovirt.example.com/ovirt-engine/api
user		= admin@internal
password	= password
ca_file		= ca.crt
bkpvm		= bkpvm
bckdir 		= /mnt/

[restore]
url		= https://ovirt.example.com/ovirt-engine/api
user		= admin@internal
password	= password
ca_file		= ca.crt
storage		= gfs_pool0
proxy		= ovirt.example.com
proxyport	= 54323

url: oVirt API URL
user: User name
password: User password
ca_file: Path to ca.crt
bkpvm: Name of our bkpvm
bckdir: Path to store backups in .qcow2 format
storage: Storage domain where we'll restore our backups
proxy: IP or hostname of the ovirt-image-proxy host (Default: ovirt-engine)
proxyport: TCP port of the ovirt-image-proxy (Default: 54323)

Create backup

In order to create backups of virtual machines you should use the syntax bellow:

/opt/VirtBKP/backup_vm.py <configuration_file> <vm_name>

Example:

/opt/VirtBKP/backup_vm.py /opt/VirtBKP/default.conf webserver

Restore backup

In order to restore an existing backup you should use the syntax bellow:

/opt/VirtBKP/upload_disk.py <configuration_file> <qcow2_file>

Example

/opt/VirtBKP/upload_disk.py /mnt/webserver_2017-04-28-00h.qcow2

vacosta94 / VirtBKP