CentOS tutorial - IT technology blog
Posted inCentos

Production-Ready KVM/QEMU Setup on CentOS Stream 9: Bridge Network, SELinux, and firewalld Done Right

A default KVM setup is easy — but production requires more. This article focuses on three commonly overlooked areas: bridge networking with nmcli instead of the default NAT, proper SELinux context configuration instead of disabling it, and firewalld FORWARD rules to get VM traffic working. Includes remote Virt-Manager management over SSH and troubleshooting common errors.
Virtualization tutorial - IT technology blog
Posted inVirtualization

CPU Pinning and NUMA Topology on Proxmox VE: Optimizing Virtual Machine Performance for Low Latency

CPU pinning and NUMA topology are two VM performance optimization techniques that are often overlooked on Proxmox VE. This guide walks through the configuration step by step — from inspecting the host topology to pinning vCPUs and isolating cores — to reduce latency for workloads that demand low-latency performance, such as databases and real-time processing.