The document discusses a multi-site hyperconverged setup using OpenNebula and DRBD9 by Linbit, detailing its components and deployments. It highlights the benefits of DRBD, including synchronous replication and cloud compatibility, as well as the infrastructure of OpenNebula clusters established in Vienna and a slave zone in France. Additionally, it outlines the migration process from Ganeti to KVM with OpenNebula.

1. Multi-Site
Hyperconvered
OpenNebula with
DRBD9
LIN:BIT DR:BD

2. Introductions
● LINBIT and LINFORGE
○ Johannes Tiefenbacher
○ Hayley Swimelar
● OpenNebula & DRBD
● Austrian Telecommunications
Company

3. What is DRBD?
● Block Storage Driver
● In the Linux Kernel since 2009
○ Created 1999
● Synchronous Replication

5. DRBD9 & DRBD Manage
● More Replicas
● Simpler Deployment
● Made for the Cloud

6. DRBD8 Resource File
resource r0 {
device /dev/drbd0;
disk /dev/vg_drbd/lv_drbd;
meta-disk internal;
on cent6a {
address 192.168.5.110:7789;
}
on cent6b {
address 192.168.5.111:7789;
}
}

7. DRBD Manage Equivalent
drbdmanage add-volume r0 100G --deploy 2

8. DRBD Manage Storage Plugin
● What is a storage plugin?
● Datastore Manager
● Transfer Manager

9. ONE Storage Plugins in Three Steps
● Install the addon driver from
github.com/OpenNebula on the
Front End node
● Update /etc/one/oned.conf
● Create a new DataStore

10. System Architecture
● 2 Hyperconverged Opennebula 5.2
Clusters in Vienna
● 1 DRBD Manage Cluster
● 1 Cluster for Interval Services
● 1 Cluster for External Services
● 1 Slave zone in France (identical setup)

12. Migration from Ganetti
● Migrate from Xen Ganetti to KVM
OpenNebula
● Creates new OpenNebula
Volumes
● Developed by Johannes

13. Q & A