Cilium LoadBalancer IPAM and L2 Service Announcement

In Cilium 1.13, we introduced support for LoadBalancer IP Address Management (LB-IPAM) and the ability to allocate IP addresses to Kubernetes Services of the type LoadBalancer.

Cloud providers natively provide this feature for managed Kubernetes Services and therefore this feature is more one for self-managed Kubernetes deployments or home labs.

LB-IPAM works seamlessly with Cilium BGP: the IP addresses allocated by Cilium can be advertised to BGP peers to integrate your cluster with the rest of your network.

For users who do not want to use BGP or that just want to make these IP addresses accessible over the local network, we are introducing a new feature called L2 Announcements in Cilium 1.14.

When you deploy a L2 Announcement Policy, Cilium will start responding to ARP requests from local clients for ExternalIPs and/or LoadBalancer IPs.

Typically, this would have required a tool like MetalLB but Cilium now natively supports this functionality.

Try it in this new lab!

VersionOpen Source

Main steps in the lab

01🏛️ The Lab Environment

Explore the lab's environment

02👮‍♀ L2 Announcement Policies

Let's deploy a first L2 announcement policy

03👁️ Visualize Traffic

Look, here are the packets!

04🪪 Automatic IPAM

Automatically assign IP addresses to Services