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MetalLB

MetalLB is a load-balancer implementation for bare-metal Kubernetes clusters. It gives Service objects of type LoadBalancer a real, externally reachable IP on clusters that don't run on a cloud provider with a built-in load-balancer integration, by announcing addresses via Layer 2 (ARP/NDP) or BGP.

This wrapper (chart version 0.11.0) pins the Bitnami metallb chart (currently 6.4.22, from https://charts.bitnami.com/bitnami) and adds the IPAddressPool / L2Advertisement CRs KubeAid needs to hand out addresses.

Why it's in KubeAid​

Bare-metal and Hetzner-style KubeAid clusters have no cloud load-balancer to satisfy type: LoadBalancer Services (ingress-nginx/Traefik entrypoints, etc.). MetalLB fills that gap.

Prerequisites​

  • Kubernetes 1.23+, Helm 3.8.0+ (upstream chart requirement).
  • A block of IPs routable to the cluster's nodes for Layer 2 mode, or a BGP route reflector/peer for BGP mode.

Key values / KubeAid-specific configuration​

  • values.yaml in this wrapper ships empty — all Bitnami metallb subchart configuration and the address pool below are expected to come from a cluster's own values file.
  • ipaddresspool.name / ipaddresspool.addresses — rendered into an IPAddressPool (templates/ipaddresspool.yaml); addresses accepts a list of CIDRs or explicit start-end IP ranges.
  • ipaddresspool.layer (truthy) — when set, renders an L2Advertisement (templates/layer.yaml) named l2advertisement1 advertising the pool above over Layer 2. Leave unset for BGP-only setups.