# Technology Short Take 189

DevFeed: [Technology Short Take 189](<https://devfeed.tech/articles/technology-short-take-189-10919.md>)

Original publisher: [Read original article](<https://blog.scottlowe.org/2025/10/31/technology-short-take-189/>)

Author: Scott Lowe

Published: 2025-10-31T13:00:00Z

Content type: article

Language: en

Sources: [Scott's Weblog](<https://devfeed.tech/sources/scott-s-weblog.md>)

Topics: [networking](<https://devfeed.tech/topics/networking.md>), [Exploit](<https://devfeed.tech/topics/exploit.md>), [Security](<https://devfeed.tech/topics/security.md>), [Kubernetes](<https://devfeed.tech/topics/kubernetes.md>), [Multi-tenancy](<https://devfeed.tech/topics/multi-tenancy.md>), [evpn](<https://devfeed.tech/topics/evpn.md>), [GitLab](<https://devfeed.tech/topics/gitlab.md>), [VXLAN](<https://devfeed.tech/topics/vxlan.md>), [Cloud](<https://devfeed.tech/topics/cloud.md>), [Hardware](<https://devfeed.tech/topics/hardware.md>), [migration](<https://devfeed.tech/topics/migration.md>)

Tags: [aws](<https://devfeed.tech/tags/aws.md>), [cilium](<https://devfeed.tech/tags/cilium.md>), [cli](<https://devfeed.tech/tags/cli.md>), [cloud](<https://devfeed.tech/tags/cloud.md>), [cni](<https://devfeed.tech/tags/cni.md>), [containers](<https://devfeed.tech/tags/containers.md>), [cri-o](<https://devfeed.tech/tags/cri-o.md>), [devops](<https://devfeed.tech/tags/devops.md>), [digital-ocean](<https://devfeed.tech/tags/digital-ocean.md>), [docker](<https://devfeed.tech/tags/docker.md>), [evpn](<https://devfeed.tech/tags/evpn.md>), [go](<https://devfeed.tech/tags/go.md>), [iac](<https://devfeed.tech/tags/iac.md>), [k8s](<https://devfeed.tech/tags/k8s.md>), [kubernetes](<https://devfeed.tech/tags/kubernetes.md>), [linux](<https://devfeed.tech/tags/linux.md>), [migration](<https://devfeed.tech/tags/migration.md>), [multi-tenancy](<https://devfeed.tech/tags/multi-tenancy.md>), [networking](<https://devfeed.tech/tags/networking.md>), [oci](<https://devfeed.tech/tags/oci.md>), [open-source](<https://devfeed.tech/tags/open-source.md>), [security](<https://devfeed.tech/tags/security.md>), [technology](<https://devfeed.tech/tags/technology.md>), [terraform](<https://devfeed.tech/tags/terraform.md>), [vulnerabilities](<https://devfeed.tech/tags/vulnerabilities.md>), [vxlan](<https://devfeed.tech/tags/vxlan.md>)

## AI overview

A collection of links covering data center technologies, including EVPN/VXLAN networking, Xeon 6 server availability, the VMScape exploit, F5 appliance vulnerabilities, a Red Hat GitLab breach, multi-tenant Kubernetes, cloud migration, Pulumi resource hooks, and Terraform-related AWS tag management.

## Source excerpt

Welcome to Technology Short Take #189, Halloween Edition! OK, you caught me--this Tech Short Take is not scary. I'll try harder next year. In the meantime, enjoy this collection of links about data center-related technologies. Although this installation is lighter on content than I would prefer, I am publishing anyway in the hopes of trying to get back to a somewhat-regular cadence. Here's hoping you find something useful and informative! Networking Kevin Myers dissects EVPN/VXLAN interoperability with MicroTik and IP Infusion. Ivan Pepelnjak has a new project: open source EVPN/VXLAN labs. I plan to tackle these myself in the near future! Servers/Hardware Kevin Houston takes a look at the availability of Xeon 6 CPUs across blade server vendors. Security Security researchers recently published some research on a new microarchitectural exploit called "VMScape." The TL;DR on VMScape is that it allows hypervisor information to leak from a malicious VM. Oops! Olivier Lambert has a write-up that explains why the Xen hypervisor is not affected by this exploit. (Side note: be sure to read the comments--Olivier shares some useful information there.) The leaking of source code for F5 appliances by a "nation-state affiliated cyber threat actor" has lead the CISA to call on all federal agencies to mitigate vulnerabilities in F5 appliances due to "an imminent threat to federal networks using F5 devices and software." That's not good. In early October of this year, Red Hat confirmed the breach of one of its GitLab instances, leading to the theft of nearly 570GB of data across 28,000 repositories. Oof. Cloud Computing/Cloud Management Iain Smart reviews some common exploit paths when trying to build multi-tenant Kubernetes clusters. As Iain says, multi-tenancy is hard. Digital Society discusses their migration off AWS and Digital Ocean to Hetzner. Just this past week I learned of Pulumi's resource hooks, a feature made available back in June of this year. Hrittik Roy discusses vClus