Storage on Cozystack

Cozystack v0.40: LINSTOR Scheduler, SeaweedFS Traffic Locality, ValuesFrom Configuration, and Platform Decomposition

Sat, 10 Jan 2026 00:00:00 +0000

Cozystack v0.40: LINSTOR Scheduler, SeaweedFS Traffic Locality, ValuesFrom Configuration, and Platform Decomposition

Version 0.40 is a substantial release that optimizes storage performance, introduces a new configuration mechanism, and refactors the platform architecture for modularity.

Major Features and Improvements

LINSTOR Scheduler

A new LINSTOR scheduler places pods on nodes that have local storage replicas, minimizing network I/O for storage-heavy workloads. An admission webhook automatically routes pods to the optimal node. Combined with auto-diskful (converting diskless to diskful after 30 minutes of Primary state), this creates a self-optimizing storage topology.

Cozystack v0.37: OpenAPI Dashboard, Lineage Webhook, PVC Expansion in Tenants, and SeaweedFS S3 Discovery

Fri, 10 Oct 2025 00:00:00 +0000

Cozystack v0.37: OpenAPI Dashboard, Lineage Webhook, PVC Expansion in Tenants, and SeaweedFS S3 Discovery

Version 0.37 is a major release that overhauls the platform UI and introduces powerful new infrastructure capabilities.

Major Features and Improvements

New OpenAPI-Based Dashboard

The old Kubeapps-based UI is replaced with a brand-new OpenAPI-based Dashboard. The new dashboard features module-aware navigation, dynamic branding, richer Kubernetes resource views, and is built directly on the Cozystack API schema — making it automatically aware of all available applications and their configuration options.

Cozystack v0.12: StorageClass for All Apps, Cilium v1.16, VM Configuration, and E2E Sandbox

Wed, 21 Aug 2024 00:00:00 +0000

Cozystack v0.12: StorageClass for All Apps, Cilium v1.16, VM Configuration, and E2E Sandbox

Version 0.12 brings storage flexibility, updated networking, and better testing infrastructure.

Major Features and Improvements

StorageClass for All Applications

All applications now support a storageClass option, allowing operators to choose which storage class to use per application. This is especially important for clusters with multiple storage backends.

Cilium v1.16.1

Cilium is updated to v1.16.1, bringing performance improvements and new networking features.

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.

DIY: Create Your Own Cloud with Kubernetes (Part 2)

Fri, 05 Apr 2024 07:35:00 +0000

Author: Andrei Kvapil (Ænix)

Continuing our series of posts on how to build your own cloud using just the Kubernetes ecosystem. In the previous article, we explained how we prepare a basic Kubernetes distribution based on Talos Linux and Flux CD. In this article, we’ll show you a few various virtualization technologies in Kubernetes and prepare everything need to run virtual machines in Kubernetes, primarily storage and networking.

We will talk about technologies such as KubeVirt, LINSTOR, and Kube-OVN.

Cozystack v0.1: ZFS Support, Leader Election, and Documentation Move

Tue, 20 Feb 2024 00:00:00 +0000

Cozystack v0.1: ZFS Support, Leader Election, and Documentation Move

The first feature release of Cozystack lays the groundwork for a production-grade platform.

Major Features and Improvements

ZFS Support

Cozystack now supports ZFS as a storage backend, giving operators a choice of battle-tested storage for their infrastructure.

Leader Election

Leader election is enabled for the Cozystack controller, ensuring that only one instance is active at a time — a prerequisite for high-availability deployments.