Before diving in, I want to highlight the people responsible for this new optimization, who are Stefan Hoffman, Yatin Karel and Sean Mooney. One of the major pain points in OpenStack is live migration, particularly regarding connectivity immediately after the virtual machine resumes on the destination node. In clusters with mission-critical workloads, it is imperative […]
The first Cursor post tried the generative capabilites of the AI model used (Claude Code 4.5). This is a very interesting area where the AI tooling can leverage the code we are creating, speeding this generation. But let’s be honest: most of the time I’m reading code (done or not by me), trying to understand […]
Today’s post will be in line with the current trend: AI. Although AI is being introduced into many industries, the programming industry is one of the most transformed by this new revolution. The possibility of reviewing code as you write it; of creating, launching, and correcting unit and functional tests; or of analysing complex code […]
Last week I had a customer with an issue in an OpenStack deployment running with ML2/OVN. Randomly, when creating a virtual machine, the Nova server returned a timeout during the VIF plugin. It took us some time to discover that the IP address assigned to the new port was already assigned to a rogue Logical_Switch_Port […]
One symptom of narcissism is to make self-referring quotes; thus this is how I’ll start this post. Previously in this fantastic blog, we talked about the high availability router gateway ports in OVN. In this post we briefly commented that the gateway Logical Router Ports are scheduled across the gateway chassis, using any of the […]
Long time ago (only one year after I started “playing” with OpenStack), Miguel Angel Ajo reported a RFE in Launchpad: strict minimum bandwidth support. After some releases, we finally added this functionality to OpenStack Neutron and now we are able to model and report to Placement API the available bandwidth of the physical interfaces connected […]
Do you know how Nova knows where to spawn a virtual machine? With the Nova scheduler service. This service allows to define a set of filters that should match with the host resources in order to define and spawn the virtual machines. Since Newton (a log time ago…) a new resource tracker was introduced: the […]
Today’s topic is related to the OVN backend driver in OpenStack Neutron. This is the last in-tree ML2 driver added, initially deployed as an external plugin. From the ovn.org website, “OVN (Open Virtual Network) is a series of daemons for the Open vSwitch that translate virtual network configurations into OpenFlow”. OVN is based on Open […]
Welcome back! Unlike other posts in this blog, used to advertise my own achievements in OpenStack (really?, how you dare), this post will help you to understand how can you connect one virtual machine to two external networks. Of course, avoiding the direct approach of directly creating two ports on each network. No, let’s do […]
Today’s post is… a bit dense, I will admit. And to make things a bit more complex, I’m going to talk about the external ports too but for a reason. Actually this post comes from a bug (no way!) that claims that the external ports are usually bound to chassis different to the router gateway […]