Opennebula & Bacula

Backing Up Your VM

Alberto García Fernández – Rentalia.com

Who am I?

● Sysadmin @ Rentalia.com

● Lazy by nature

● Automate and forget

alberto.garcia.fernandez.it@gmail.com

linkedin.com/in/albertogarciafdezgithub.com/AlbertoGarciaFdez

Agenda

● Making backups of VM, Why?

● A bit of Bacula

● OpenNebula & Bacula

● Demo

● Questions

Why

● I do Continuous Delivery (Puppet)

● I use some Golden/Master images too Images that won't change (completed projects) Slow to deploy services

● Machines without Continuous Delivery Dev machines

● Making backups is always a great idea

A bit of Bacula

http://bacula.org/

● Backup solution Fetch, compress and store data across your network

● RunScript Directive Make use of scripts at different states of the backup

● Get file paths from script Set the backup target from a script at running time

A bit of Bacula

Backup example

OpenNebula & Bacula

FileSet example within Bacula

OpenNebula & Bacula

We want automatic backups from VM disk images

● We have to glue the pieces – from OpenNebula

➢ onevm disk-saveas – live backup of running VM's

➢ oneimage show – retrieve new image id

➢ oneimage delete – erase the copy

OpenNebula & Bacula

We want automatic backups from VM disk images

● We have to glue the pieces – from Bacula

➢ Client = $OpenNebula_Frontend➢ We get acces to the cli from Bacula connection

➢ File = “\\|copy_this.sh vm_(id|name)”➢ Which returns new image path

➢ ClientRunAfterJob = “Clean.sh”

OpenNebula & Bacula

OpenNebula Job

OpenNebula & Bacula

File.sh returns a path

OpenNebula & Bacula

File.sh

OpenNebula & Bacula

Clean.sh

OpenNebula & Bacula

Problems arise

1) Bacula connects as root but we need oneadmin Using 'su' within scripts or bacula directives OR Adding "-u oneadmin -g oneadmin" default/bacula-fd

2) Wait for READY status on new image Otherwise, bacula will fetch an incomplete copy

3) What is the storage id to backup from the VM In our case it's always 0 but you can use any

parameter to identify the correct disk Type = OS seems logic

OpenNebula & Bacula

1) Bacula connects as root but we need oneadmin

/etc/default/bacula-fd

2) Wait for READY status on new image /var/lib/one/File.sh

OpenNebula & Bacula

3) What is the storage id to backup from the VMUsing 0 works for me. Experiment with your own env

OpenNebula & Bacula

Ok ok ok, i'll give a better solution

Questions Time

Thanks for your attention!

alberto.garcia.fernandez.it@gmail.comalberto.garcia@rentalia.com

github.com/AlbertoGarciaFdez