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Metal³

On the record

Audience
The project describes use cases including provisioning on-premises Kubernetes cluster nodes and managing bare-metal machines in testing or high-performance computing labs.metal3.io · read 8 Oct 2026
Bare-metal lifecycle
Metal³ can enroll bare-metal machines, provision operating system images, and manage Kubernetes clusters deployed on them.book.metal3.io · read 8 Oct 2026
Cluster API
Metal³ includes a Cluster API infrastructure provider for creating and managing physical servers.metal3.io · read 8 Oct 2026
Community support
The project offers community support through Kubernetes Slack, a mailing list, and a weekly community call.book.metal3.io · read 8 Oct 2026
Deployment security
The security guide says quick-start defaults such as minimal TLS, an unauthenticated image server, and cluster-wide permissions are intended for evaluation rather than production.book.metal3.io · read 8 Oct 2026
Hardware limits
Only Ironic is currently supported as a provisioner, and the FAQ says support for other provisioners is not on the roadmap.metal3.io · read 8 Oct 2026
Hardware protocols
Metal³ supports network boot with iPXE and virtual media boot on compatible hardware using remote management protocols such as IPMI and Redfish.book.metal3.io · read 8 Oct 2026
Hardware support
The project supports x86_64 and AARCH64, but mixed-architecture clusters are not supported yet.metal3.io · read 8 Oct 2026
Host management
Bare Metal Operator inspects host hardware, can configure RAID and firmware, provisions images, and can clean disks before and after provisioning.book.metal3.io · read 8 Oct 2026
Operating system images
Metal³ can use operating systems available in a cloud image format, and first-boot customization requires cloud-init or a similar tool in the image.metal3.io · read 8 Oct 2026
Operating systems
Metal³ can install operating systems available in a cloud image format, and first-boot configuration requires cloud-init or a similar tool.metal3.io · read 8 Oct 2026
Project status
Metal³ is a Cloud Native Computing Foundation incubating project.metal3.io · read 8 Oct 2026
Provisioning
Metal³ can discover hardware, configure BIOS and RAID, clean disks, install operating system images, deploy Kubernetes, and perform rolling upgrades.book.metal3.io · read 8 Oct 2026
Provisioning backend
Metal³ uses OpenStack Ironic for bare-metal provisioning, and Ironic can run as a standalone service without other OpenStack services.metal3.io · read 8 Oct 2026
Provisioning limit
Ironic is currently the only supported provisioner; the FAQ says other provisioners are not on the current roadmap.metal3.io · read 8 Oct 2026
Provisioning protocols
Supported hardware uses remote management protocols such as IPMI and Redfish, with network boot or, on some hardware, virtual media boot.book.metal3.io · read 8 Oct 2026
Purpose
Metal³ is an open-source project that provides tools for managing bare-metal infrastructure using Kubernetes.metal3.io · read 8 Oct 2026
Security
The project directs suspected vulnerability reports to its security mailing list and documents severity assessment, fixes, and disclosure handling.book.metal3.io · read 8 Oct 2026

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