Kubevirt on Cozystack

Cozystack v0.39: Topology-Aware Routing, Windows VM Scheduling, Talm Overhaul, and VMAgent for Tenants

Tue, 23 Dec 2025 00:00:00 +0000

Cozystack v0.39: Topology-Aware Routing, Windows VM Scheduling, Talm Overhaul, and VMAgent for Tenants

Version 0.39 enhances networking, scheduling, and the tooling around Cozystack infrastructure management.

Major Features and Improvements

Topology-Aware Routing for Cilium

Cilium services now support topology-aware routing, keeping traffic local to the same zone or region when possible. This reduces latency and cross-zone network costs.

Automatic Cilium Pod Rollouts

Cilium pods now automatically roll out when their configuration changes, eliminating the need for manual restarts after config updates.

The Evolution of Virtualization Platforms: The Rise of Managed Services and Local Providers’ Edge…

Wed, 04 Jun 2025 00:00:00 +0000

The Evolution of Virtualization Platforms: The Rise of Managed Services and Local Providers’ Edge Against Hyperscalers

Hello everyone! I’m Andrey Kvapil, CEO of Ænix and developer of Cozystack, an open-source platform and framework for building cloud infrastructure. In this article, I want to share my perspective on how modern cloud patterns have transformed infrastructure approaches, the evolving role of service providers and public clouds in this landscape, and most importantly, how virtualization’s purpose has fundamentally changed in today’s infrastructure stack.

Cozystack Now Offers GPU Passthrough for AI/ML Virtual Machines

Fri, 18 Apr 2025 00:00:00 +0000

Cozystack Now Offers GPU Passthrough for AI/ML Virtual Machines

The open-source cloud platform has introduced direct GPU passthrough in its latest release, enabling users to accelerate AI, machine learning, and other compute-intensive workloads on virtual machines. By leveraging physical GPUs from host nodes, teams can now deploy open-source AI stacks without proprietary cloud dependencies.

Upcoming features include vGPU resource partitioning and a Kubernetes-native GPU operator for multi-tenant clusters.

Read the documentation →

Cozystack v0.19: Keycloak SSO, Dashboard Services View, KubeVirt v1.4, and MetalLB Update

Wed, 04 Dec 2024 00:00:00 +0000

Cozystack v0.19: Keycloak SSO, Dashboard Services View, KubeVirt v1.4, and MetalLB Update

Version 0.19 introduces identity management with Keycloak and significantly improves the dashboard experience.

Major Features and Improvements

Keycloak SSO Integration

Keycloak is now available as an optional platform component, providing:

Single Sign-On (SSO) for the Cozystack dashboard and Kubeapps.
Role-based access with configurable SSO roles.
Keycloak is optional and can be enabled per distro bundle.
Network policies included for secure Keycloak operation.

Dashboard Services View

Services are now visible in the dashboard, giving users a clear overview of their deployed managed services and their endpoints.

Cozystack v0.13: VictoriaLogs, VM Live Migration, KubeVirt v1.3, and Bridge Networking

Sat, 31 Aug 2024 00:00:00 +0000

Cozystack v0.13: VictoriaLogs, VM Live Migration, KubeVirt v1.3, and Bridge Networking

Version 0.13 is a major release that introduces centralized logging, a completely reworked virtual machine experience, and updated virtualization components.

Major Features and Improvements

VictoriaLogs and Fluent-bit

Cozystack gains a centralized log collection system with VictoriaLogs as the storage backend and Fluent-bit as the log shipper. This gives operators full visibility into platform and application logs.

VM Rework: Cloud-Init, SSH Keys, and Live Migration

The virtual machine application is completely reworked:

Cozystack v0.9: KubeVirt v1.2.2, Kamaji v1.0, Tenant K8s v1.30, and Node Group Upgrades

Wed, 10 Jul 2024 00:00:00 +0000

Cozystack v0.9: KubeVirt v1.2.2, Kamaji v1.0, Tenant K8s v1.30, and Node Group Upgrades

Version 0.9 brings major component updates and improves the tenant Kubernetes lifecycle.

Major Features and Improvements

Component Updates

KubeVirt updated to v1.2.2 with stability improvements.
Kamaji reaches v1.0.0 — a significant milestone for the tenant control plane manager.
Piraeus updated to v2.5.1.
Cluster API updated with hardcoded version pinning for reproducibility.

Tenant Kubernetes v1.30.1

Tenant Kubernetes clusters are upgraded to v1.30.1, the latest stable release at the time.

Cozystack v0.6: VM Serial Console, Ephemeral Storage for Containers, and etcd Auto-Quota

Thu, 16 May 2024 00:00:00 +0000

Cozystack v0.6: VM Serial Console, Ephemeral Storage for Containers, and etcd Auto-Quota

Version 0.6 focuses on improving the virtual machine experience and storage management in tenant Kubernetes clusters.

Major Features and Improvements

VM Serial Console

Virtual machines now support serial console access via virtctl from the KubeVirt toolkit. The root user no longer requires a password, making VM debugging straightforward.

Ephemeral Storage for Containers

VMs now launch with two ephemeral disks mounted at /var/lib/containerd and /var/lib/kubelet. This prevents container storage from filling up the root disk — a common issue in long-running clusters.