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Tech riderRev. 20 Sept 2026

PureLB

Ch 166.2of 26 Load Balancing Software
  1. 1Runs onLinux, self-hosted
  2. 2CostsNot stated by the maker
  3. 3Managed serviceNo
  4. 4Layer 4 routingYes
3 lines stated Written from the maker's own pages: purelb.io
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The PureLB homepage

Overview

PureLB is ranked #16 of 26 in load balancing software on Specifiction. It runs on Linux, Self-hosted.

Compared on load balancing software

Managed service
Nopurelb.io
Layer 4 routing
Yespurelb.io

Facts

Purpose
PureLB is a Kubernetes Service LoadBalancer for bare metal that allocates IP addresses from configured pools and announces them using Linux networking, with optional BGP.purelb.io · 4 Oct 2026
Address pools
PureLB supports local, remote, and Netbox address pools, with each ServiceGroup configured for exactly one type.purelb.io · 4 Oct 2026
Local addresses
For local addresses, a Kubernetes Lease based election chooses one node to announce each address, and a new node can take over if the winner fails.purelb.io · 4 Oct 2026
Remote addresses
Remote addresses are added to a dummy interface on every node and advertised through BGP; an upstream router can distribute traffic across nodes using ECMP.purelb.io · 4 Oct 2026
IPv4 and IPv6
ServiceGroups can include both IPv4 and IPv6 pools, and PureLB supports dual-stack deployments.purelb.io · 4 Oct 2026
Configuration
PureLB uses Kubernetes Custom Resource Definitions for address pools and node agent configuration.purelb.io · 4 Oct 2026
Integration
PureLB can request IP addresses from Netbox, but its documentation says this integration is currently unsupported and may not work with recent Netbox versions.purelb.io · 4 Oct 2026
Monitoring
The Allocator and LBNodeAgent expose Prometheus metrics on port 7472 at /metrics.purelb.io · 4 Oct 2026
Installation
PureLB can be installed with kubectl manifests or Helm; its documentation recommends Helm for production deployments.purelb.io · 4 Oct 2026
Requirements
PureLB requires a Kubernetes cluster with an operational CNI and Linux nodes because it uses the Linux netlink API.purelb.io · 4 Oct 2026
Security
The Allocator runs as non-root with a read-only filesystem and no capabilities; LBNodeAgent runs as root with NET_ADMIN and NET_RAW capabilities on the host network.purelb.io · 4 Oct 2026
License
PureLB is licensed under the Apache License, Version 2.0.purelb.io · 4 Oct 2026
Support
The project lists its Kubernetes Slack #purelb-users channel and GitHub Issues as ways to get help.purelb.io · 4 Oct 2026

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Where it ranks on Specifiction

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Sources