urunc v0.5.0 Released: More Unikernel Power, Now K8s-Native!

Apr 10, 2025 2 min read

The urunc team is excited to announce the release of urunc v0.5.0, a major step forward in our mission to make unikernel-based deployments seamless, secure, and cloud-native. This release expands urunc’s capabilities across containerized and orchestrated environments, with powerful new features, enhanced monitor control, and expanded compatibility.

What’s New in v0.5.0

Namespace & Compatibility Enhancements

Full namespace support (except user namespaces) unlocks broader container and runtime integrations. MirageOS support brings OCaml-based unikernels into the fold, expanding Urunc’s reach across the unikernel ecosystem.

Kubernetes-First Deployments

urunc_deploy introduced for one-command installation and configuration in existing Kubernetes clusters. Non-root monitor execution now supported, enhancing security and compliance for enterprise-grade environments.

Smarter Monitor Interface

A revamped monitor interface introduces specialized CLI hooks:

  • MonitorBlockCli() for block device options
  • MonitorNetCli() for network-specific flags
  • MonitorCli() for general monitor options

Monitors now spawn directly from the container’s root filesystem.

Cloud-Native Integrations

Fixes for Knative readiness probes and improvements to devmapper/rootfs handling ensure tighter integration with serverless platforms and container runtimes.

CI/CD, Docs & Developer Experience

Go updated to v1.24.1, introduced End-to-end testing powered by Incus, replacing legacy VM spawning. CI enhancements include warning handling during container ops and a cleanup workflow for stale issues/PRs.

Documentation improvements include:

Updated Kubernetes YAML examples, added new tutorials for EKS and Knative, and expanded examples on unikernel packaging

Read the Full Changelog

View on GitHub

Hands-on!

urunc continues to push the boundaries of lightweight virtualization, bringing the benefits of unikernels to modern cloud-native environments. With v0.5.0, we’re building the foundation for secure, performant, and flexible infrastructure at scale.

For more information, tutorials, and community links, visit: https://urunc.io

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