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Tech riderRev. 4 Oct 2026

MetalLB

Ch 086.5of 26 Load Balancing Software
  1. 1Runs onLinux, self-hosted
  2. 2CostsFree plan
  3. 3Managed serviceNo
  4. 4Layer 4 routingYes
4 lines stated Written from the maker's own pages: metallb.io
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The MetalLB homepage

Overview

MetalLB is ranked #8 of 26 in load balancing software on Specifiction. It runs on Linux, Self-hosted. There is a free plan.

MetalLB plans and pricing

All plans
MetalLB Free No paid plans listed; open source project for Kubernetes load balancing metallb.io · 4 Oct 2026

Compared on load balancing software

Managed service
Nometallb.io
Layer 4 routing
Yesmetallb.io

Facts

Purpose
MetalLB provides a network load balancer for Kubernetes clusters that do not run on a cloud provider.metallb.io · 4 Oct 2026
Address allocation
It assigns and unassigns service IPs from address pools configured by the operator.metallb.io · 4 Oct 2026
Announcement modes
It announces service addresses using ARP, NDP, or BGP, depending on the selected mode.metallb.io · 4 Oct 2026
Layer 2
In layer 2 mode, one cluster machine announces a service IP using ARP for IPv4 or NDP for IPv6.metallb.io · 4 Oct 2026
BGP
BGP mode peers cluster machines with nearby routers and can distribute traffic across multiple nodes.metallb.io · 4 Oct 2026
BGP backend
The recommended FRR-K8s mode supports BFD, IPv6, and merging additional FRR configuration.metallb.io · 4 Oct 2026
Install options
MetalLB can be installed using Kubernetes manifests, Kustomize, or Helm; an Operator is also available on OperatorHub.metallb.io · 4 Oct 2026
Configuration
MetalLB remains idle until configured with resources such as IPAddressPool in its deployment namespace.metallb.io · 4 Oct 2026
Requirements
The project lists Kubernetes 1.13.0 or later, a compatible cluster network, and IPv4 addresses as requirements.metallb.io · 4 Oct 2026
Cloud compatibility
MetalLB is generally incompatible with cloud providers; its compatibility page lists AWS, Azure, DigitalOcean, and Google Cloud as unsupported.metallb.io · 4 Oct 2026
Runtime privileges
The speaker pod requires elevated permissions for its network functions.metallb.io · 4 Oct 2026
Security changes
Release notes report read-only root filesystems and disabled privilege escalation for containers that lacked those settings, and a fix for CVE-2025-22874.metallb.io · 4 Oct 2026
Maturity
MetalLB describes itself as a beta project and says its configuration format may change incompatibly as the project develops.metallb.io · 4 Oct 2026
Community and support
The project provides a users mailing list and Slack channel, and ongoing development and maintenance are led by project maintainers.metallb.io · 4 Oct 2026

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Where it ranks on Specifiction

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