A Blog of the ZHAW Zurich University of Applied Sciences
In FIWARELab, we recently upgraded from Openstack Icehouse to a Kilo High Availability (HA) deployment. Our approach involved having two simultaneous active Openstack deployments so VMs and volumes could be migrated from one deployment to another with a minimal downtime. More specifically, VMs and volumes were snapshotted and transferred to the Kilo deployment as images […]
We had to investigate the operation of one of our Openstack compute nodes as it was exhibiting some unusual behaviour. We quickly determined that there was some unexpected packet loss and we had reason to believe that this could have been due to the packet processing in the node. Investigating this problem necessitated some deeper exploration […]
In our previous blog post we described our experience enabling floating ips through modifications to nova python libraries in an Openstack Cells deployment using nova network. That solution was not robust enough and hence we had a go at installing neutron networking, although there is very little documentation specifically addressing Neutron and Cells. Neutron’s configuration […]
The Problem Cloud networking bases on tech and protocols that were not initially designed for it. This has lead to unnecessary overhead and complexity in all phases of a cloud service. Tunneling protocols generate inherent cascading and encapsulation especially in multi tenant systems. The problem increases by vendor specific configuration requirements and heterogenous architectures. This complexity […]
Openstack is generally well suited for typical use cases and there is hardly reasons to tinker with advance options and features available. Normally you would plan your public IP addresses usage and management well in advance, but if you are an experimental lab like ours, many a times things are handled in an ad-hoc manner. […]