Directory DevOps & Platform EngineeringInfrastructure as Codemetal3-io

metal3-io

Open Source

About metal3-io

Metal3 is an open-source project that provides a set of tools for managing bare-metal infrastructure using Kubernetes. The project's mission is to provide a flexible, open-source solution for bare metal provisioning that combines bare metal performance with Kubernetes automation. Supported use cases range from provisioning nodes for an on-prem Kubernetes cluster to managing the full lifecycle of bare-metal machines in a testing or high-performance computing lab. It supports installing operating systems from images or OCI artifacts with first boot customization. It provides pre-installation configuration of firmware (BIOS) settings and RAID setup.

Used for

Provisioning nodes for an on-prem Kubernetes cluster using Cluster API
Managing the full lifecycle of bare-metal machines in a testing or high-performance computing lab
Installing operating system from images or OCI artifacts with first boot customization
Configuring firmware (BIOS) settings and RAID setup prior to installation

From metal3-io's own website, read 2026-10-24. How we build listings.

How to evaluate Infrastructure as Code

This is how the CIOPages Research Team evaluates this category. It is not an assessment of metal3-io. It comes from our Infrastructure as Code (IaC) Platforms buyer guide.

25%

Language & Authoring Model

Declarative DSL (HCL) vs. general-purpose language (TypeScript, Python, Go, C#); readability for reviewers vs. expressive power (loops, conditionals, abstractions); module/component reuse and registry maturity; testing and IDE support; learning curve for the people who will actually write infrastructure

20%

State Management & Drift

Where state is stored, remote-state locking to prevent concurrent-apply corruption, state encryption and secret handling, plan/preview fidelity, drift detection and continuous reconciliation, import of existing resources, and blast-radius controls on apply

20%

Policy-as-Code & Governance

OPA/Rego and Sentinel support, pre-apply guardrails (block non-compliant resources, mandatory tags, region/cost limits), RBAC and SSO/SAML/SCIM, audit logging, approval workflows, and integration with cost-estimation and security scanning in the pipeline

15%

Provider Ecosystem & Portability

Breadth and quality of providers/resource coverage, day-one support for new cloud services, multi-cloud and on-prem reach, third-party SaaS providers, and how locked-in the resulting code is to one vendor or one cloud

10%

Collaboration & Workflow (TACOS)

Run orchestration and queuing, VCS/PR-driven plans, stack dependencies, self-service environments with TTL/ephemeral teardown, drift remediation workflows, and whether you self-host in CI (Atlantis-style) or buy a managed platform

10%

Licensing & Project Health

License (open-source MPL/Apache vs. source-available BUSL vs. proprietary), governance and ownership after recent M&A, release cadence and roadmap, community/foundation backing (CNCF, Linux Foundation), and how easily you could exit or fork

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