Session
Schedule FOSDEM 2022
Virtualization and IaaS

Tracing KubeVirt traffic with Istio

D.virtualization
Radim Hrazdil
<p>Software development has been gradually shifting from monolithic to distributed containerized applications. Such applications are composed of components referred to as micro services. With the increasing number of micro services, it becomes increasingly difficult to understand how all the components communicate.</p> <p>This is where Istio service mesh comes into play. Istio allows developers to manage and monitor network traffic between micro services and by providing features like mutual TLS, request retries or request circuit breaking. Vendoring these features from Istio helps keeping micro services focused on the actual application logic as they don't need to be implemented by the micro services. The IT industry has broadly adopted this architecture, but there are still plenty of legacy workloads running in virtual machines, which can't easily take the advantage of the features provided by service mesh. At least not until recently when KubeVirt introduced support for Istio service mesh.</p> <p>Attendees of this talk gain insight into the concept of the Istio sidecar proxy. A short demonstration showing typical use case of Istio service mesh -- canary deployment -- is presented. Next, this talk explains subtle differences of network traffic routing between regular Kubernetes pods and containerized KubeVirt virtual machines, leading to the challenges that these differences pose for traffic proxying. Finally, the changes necessary to support Istio for KubeVirt virtual machines are explained and the resulting functionality presented using the same scenario, but with the workload running in virtual machines instead of Kubernetes Pods.</p> <p>The takeaway of this talk is understanding of routing concepts behind Istio proxy sidecar with regular Kubernetes pods as well as with containerized KubeVirt virtual machines. Audience will have a chance to observe typical use case of Istio with both pods and virtual machines and get insight into the necessary changes that made this possible.</p>

Additional information

Type devroom

More sessions

2/5/22
Virtualization and IaaS
Stefan Hajnoczi
D.virtualization
<p>The VIRTIO standard defines I/O devices that are commonly used in virtual machines today. The last version of the standard was released in 2019 and much has changed since then. This presentation covers new devices and features in the upcoming VIRTIO 1.2 standard.</p> <p>There are 9 new device types: fs, rpmb, iommu, sound, mem, i2c, scmi, gpio, and pmem. We will look at the functionality offered by these devices and their status in Linux.</p>
2/5/22
Virtualization and IaaS
Christophe Fergeau
D.virtualization
<p>CodeReady Containers runs an OpenShift cluster on a laptop or workstation using virtualization. It's written in go, and uses KVM, HyperV or HyperKit depending on the OS it's running on. External network access is done through gVisor's userland TCP/IP stack which the virtual machine uses over virtio-vsock.</p> <p>This talk will start with a short presentation of what CodeReady Containers is, explain why it needs a userland TCP/IP stack, but its main focus will be around virtio vsock, how to ...
2/5/22
Virtualization and IaaS
D.virtualization
<p>OKD Virtualization is the community project bringing traditional virtualization technology into OKD. Meet the OKD Virtualization community and learn about it!</p>
2/5/22
Virtualization and IaaS
Matias Vara
D.virtualization
<p>This talk presents ToroV, a novel open-source technology that combines virtualization and containerization to enable the execution of users’ applications in a safer and improved manner. In ToroV, applications run as Virtual Machines without the need of an OS, unikernel nor device-model. ToroV combines a minimalist Virtual Machine Monitor and a virtualized guest program communicating through POSIX APIs. When the guest application requires to open or write a file, it just invokes the VMM ...
2/5/22
Virtualization and IaaS
Marcelo Amaral
D.virtualization
<p>As the number of VMs per node gets larger, using more powerful nodes (i.e. with more CPUs and RAM), the scalability of Kubevirt's control plane becomes a bottleneck, slowing down the VMI creation process. This talk will cover the motivations and concepts around general benchmarking of the KubeVirt control plane, as well as explaining the journey to running a density test with hundreds of VMs per node.</p>
2/5/22
Virtualization and IaaS
Olivier Lambert
D.virtualization
<p>Open Source virtualization is almost 20 years old. Obviously, things have evolved a lot in that time: the public cloud, new CPU architectures, new storage technologies, and more.</p> <p>What about the real, on-the-ground usage? Sysadmins, Ops and Devops are not leveraging virtualization the same way today as they did before. But what really changed? In what direction is it evolving? Is on-premise open source virtualization still relevant today?</p> <p>Through our own journey as engineers of ...
2/5/22
Virtualization and IaaS
Daniel Smith
D.virtualization
<p>It has been well established that the integrity of critical systems must be rooted in the launch. Early works such as the Xoar architecture demonstrated the need for virtualized environments to begin with a lightweight, restricted bootstrap from which isolation of PCI management could be established. Since that time, knowledge of real IOMMU implementations and how to leverage them for system integrity has evolved. In this presentation, the new Hyperlaunch capability for starting hypervisors ...