integration – Image Service - Glance – Network Service - Neutron

• Virtual private datacenter management
• KVM as the target hypervisor (x86_64|ppc|ppc64)
• VMs usually special!

Although there are some patches to enable Xen ;-)

• Cloud computing solution
• Multiple hypervisors
  • KVM (x86_64)
  • Hyper-V
  • VMware
  • XenServer
• Typically disposable VMs

Although there are some patches to enable Xen ;-)

External providers

• 3rd party products that provide core entities:
  • Hosts
  • Network
  • Storage domains
• Configure once, use everywhere
• Example providers...

Image Service - Glance

Introduction

• Virtual disk images services:
  • discovery
  • registration
  • delivery
• RESTful API for metadata and image retrieval
• Varied backing storage possibilities:
  • local fs
  • Swift
  • S3
  • rbd
  • cinder
  • vsphere

Formats

• Virtual disk formats:
  • raw
  • qcow2 - qemu
  • vdi - VirtualBox, qemu
  • iso
  • vhd, vmdk - MS, VMware, Xen
  • aki, ari, ami - Amazon
• Container formats (with VM metadata):
  • bare (no metadata)
  • ovf
  • aki, ari, ami - Amazon
  • ova (tarred ovf)

oVirt current use cases

• Import/Export disk images/templates
• Backing up unlimited amount of VM disks

oVirt future use cases

• Store ISOs and use them natively in oVirt VMs
• Import/Export full VMs/templates with:
  • Complete VM definition
  • Multiple disks
  • Snapshots

Connecting to oVirt

Image discovery

Image importing

Note the addition of "Import as Template"

Image importing

Note the retrieved description from metadata

Image exporting

Image exporting

Note the size

Image exporting

oVirt Image repository

Current limitations

• Not possible to export with multiple volumes
  • Snapshotted disks
  • Thin-provisioned over a template
• No live VM export
• No raw image sparseness supported
• No image download resuming capability

Future

• Delete images
• online snapshot squashing
• Integrated WebUI upload/download
• Consume ISOs natively
• Full VM import/export

Network Service - Neutron

Introduction

• Networking as a service:
  • Layer 2
  • Layer 3
  • Load Balancing
  • Firewall
  • Tunneling
  • VPN
• RESTful API for metadata and image retrieval
• Plugins:
  • Open vSwitch
  • Cisco UCS
  • Linux Bridge
  • Modular Layer 2
  • etc

Note the size

Architecture

Advantages

• Overlay networks
• IP address management
• Security groups
• L3-L7 services

For overlay networks it offers vxlan and gre that are much wider and maintainable than vlans. SDN

Segregate VM traffic from the outside with the right usage of rules

For IPADM that allows you to get IP config on the VMs without trouble

L3-L7: Load balancing, tunneling, VPN, etc

Best of both worlds

Host networking: oVirt

VM networking: Neutron

oVirt current use cases

• Import/Export networks
• Create subnets with IPAM
• Attach vNics to ports
• Overlay networks*

*Requires some extra steps linked in the end

Connecting to oVirt

Connecting to oVirt

Network importing

Network importing

Comes with the subnet ;-)

Network creation

Note that it is implicitly created on neutron, as they'll see

Subnet creation

Note that it is implicitly created on neutron, as they'll see

Network creation

Host configuration

vNic profile

Assign security groups

vNic creating

Create vNic without sec groups

Neutron appliance

• Ready made Neutron Service VM in four steps
• Import image from oVirt's public glance
• Create a VM from it with two vNics
• Add it as a provider
• Host agent configuration
• Based on Centos 7
• Running IceHouse RDO's Neutron

Future

• Seamless tunneling integration
• Leveraging more XaaS
• Enhancing Neutron vendor plugin integration