Migrating from Proxmox to Incus: The Ultra-Lightweight, Kernel-Level Container and VM Management Solution

Introduction: The Evolution of Hyperconverged Infrastructure

For years, Proxmox Virtual Environment (PVE) has been the undisputed champion of open-source virtualization. By combining KVM-based virtual machines and Linux Containers (LXC) into a single, accessible web interface, it democratized enterprise-grade infrastructure. However, as infrastructure demands shift toward hyper-efficiency, edge computing, and minimal resource overhead, architects are questioning whether traditional hypervisors are too heavy for modern, container-first workflows.

Enter Incus. Born as a community-driven fork of Canonical’s LXD under the Linux Containers project, Incus represents a paradigm shift. It is not just another virtualization manager; it is an ultra-lightweight, kernel-level daemon designed to orchestrate both system containers and virtual machines with unprecedented speed and minimal footprint. This article explores why forward-thinking DevOps teams and system administrators are migrating from Proxmox to Incus, and how it redefines resource efficiency.

Understanding the Architecture: Proxmox vs. Incus

To appreciate the benefits of Incus, one must contrast its architectural philosophy with that of Proxmox VE. Proxmox is fundamentally a Debian-based distribution bundled with a heavy management stack, a customized corosync cluster engine, and an extensive web GUI. While powerful, it imposes a mandatory baseline of resource consumption.

The Proxmox Approach

Proxmox relies heavily on heavy abstraction layers. Even when utilizing LXC, the management stack wrapper introduces complexity, specific storage models, and strict network configurations that can feel rigid to advanced Linux administrators. Proxmox treats containers as a secondary citizen to KVM, often leading to mixed management paradigms.

The Incus Approach: Pure Kernel Integration

In contrast, Incus operates as a streamlined system daemon (incusd). It interacts directly with native Linux kernel features such as namespaces, cgroups, and seccomp profiles to enforce isolation. When you spin up an LXC container in Incus, there is virtually zero virtualization overhead—the processes run directly on the host kernel at native bare-metal speeds.

Furthermore, Incus handles virtual machines using modern QEMU/KVM integration through a highly optimized agent system. Whether managing an isolated micro-container or a full-blown Windows Server VM, Incus treats them as unified instances, exposing an identical CLI and API experience for both.

Key Advantages of Replacing Proxmox with Incus

Choosing to migrate from a mature ecosystem like Proxmox requires compelling technical justification. Incus delivers this across several critical vectors:

Ultra-Lightweight Resource Footprint: A baseline Incus installation consumes merely a fraction of the RAM and CPU required by a idle Proxmox node. This makes Incus uniquely suited for edge computing, IoT gateways, and resource-constrained development hardware.
Unified Instance Management: Unlike Proxmox, which separates VM and container workflows into distinct UI paradigms, Incus treats everything as an “instance.” The command incus launch works seamlessly whether you are deploying an Alpine Linux container or a heavy enterprise VM image.
Advanced Storage and Networking Integration: Incus boasts native, deep integration with cutting-edge Linux storage subsystems like ZFS, BTRFS, and OVN (Open Virtual Network). Creating cross-node private networks or instant, copy-on-write snapshots requires zero complex underlying configuration.
API-First Design and Modern Tooling: Incus was built from the ground up with a powerful, secure REST API. This makes it infinitely easier to integrate into modern CI/CD pipelines, OpenID Connect (OIDC) authentication systems, and infrastructure-as-code (IaC) tools like Terraform or Ansible compared to Proxmox’s legacy API wrapper.

Comparing Performance: Kernel-Level Containers vs. Hypervisor Abstraction

In a production business environment, performance translates directly to cost efficiency. The core advantage of Incus lies in its commitment to kernel-level containerization.

“By eliminating the hypervisor tax, Incus allows businesses to achieve up to a 30-40% increase in density for containerized workloads compared to traditional hypervisor-dominant platforms.”

Because Incus relies on the host kernel to schedule processes, disk I/O and network throughput operate at near-wire speeds without requiring specialized virtualized drivers (virtio) to act as intermediaries. For database workloads, microservices, and web application hosting, this translates to drastically reduced latency and superior IOPS metrics.

Is Incus Right for Your Enterprise? Evaluating the Trade-offs

While Incus offers undeniable technical elegance, a professional migration strategy requires analyzing potential drawbacks. Proxmox remains an exceptional product because of its turnkey nature; its web GUI allows junior administrators to manage complex clusters with minimal command-line experience. Proxmox also excels in out-of-the-box backup scheduling (via Proxmox Backup Server) and built-in ceph storage orchestration.

Incus, conversely, caters to environments that value automation, performance, and code-driven infrastructure. While Incus features a rapidly evolving web user interface, its primary strength lies in its command-line interface (CLI) and API. If your team prefers declarative infrastructure configurations and seeks to eliminate licensing complexities or heavy GUI overhead, Incus is an unmatched solution.

Conclusion: Embracing the Future of Lean Infrastructure

Replacing Proxmox with Incus represents a conscious step toward modern, lightweight, and highly automated infrastructure. By leveraging pure kernel-level technologies, Incus strips away the unnecessary layers of traditional hypervisors, giving engineers direct control over their system containers and virtual machines without sacrificing security or scalability.

For organizations looking to lower operational overhead, maximize hardware lifecycle utility, and build out high-density environments, Incus is no longer just an alternative—it is the logical evolutionary next step.