OpenNebula provides the infrastructure, the Virtual Machines themselves. But what if you want to deploy applications on those VMs? What is the best method to achieve that? This session is a case study on how we have been using OpenNebula and OneFlow to deploy multi-VM services, and how we have integratet it with Ansible in order to deploy applications. This is a technical talk where we will look a bit at some Ruby code to integrate with Ansible, a bit of Ansible specific information and with a special focus on application deployment workflows.

1. Jaime Melis
OpenNebula Systems Infrastructure Engineer
@j_melis
jmelis@opennebula.org
OpenNebula and Ansible

2. OpenNebula & Ansible

3. IaaS and Configuration Management
Hypervisor
Infrastructure
● Capacity
● Networking
● Disk Images
● Life-cycle Management
Runtime
● System configuration
● Application Life-cycle
● Configuration changes
VM

4. OpenNebula
So, what can you do with
OpenNebula alone?

5. OpenNebula Contextualization
Virtual Machine ISO
Image
Network Scripts
Create Users Swap
Hostname Grow Disk
PCI Devices SSH Key

6. Base Image

7. Start Script

8. Capacity and User Inputs

9. OpenNebula Iaas
● Deploys the VM
● Bootstraps VM / OS (and even the Application)
● VMs are black boxes
… OpenNebula doesn't care about the Application
running inside

10. Ansible deploys and evolves Apps
● Evolves VMs / Apps
● Application aware
● Becoming a standard
● Deploy and maintain Application
● Make changes to the running Application / OS

11. Goal
Run Ansible playbooks based on
OpenNebula state and metadata

12. Ansible Dynamic Inventory
● Ruby OCA (XML-RPC)
○ onevm list ⇒ Extract VM state
● Get the data (User - Inputs)
● Run Ansible Playbooks
ansible-playbook -i inventory.rb site.yml

13. Inventory
● JSON format
● Includes all VM information
● READY = YES
● Written in Ruby (OCA)
● The Label is the Ansible Role
● The User Input 'ANSIBLE' is also the Ansible Role

14. Demo

15. Orchestrator

16. THANKS!
OpenNebulaConf 2017 US
5th
edition