Contents
Why do we need MetalLB?
MetalLB provides a network load-balancer implementation for Kubernetes clusters that do not run on a supported cloud provider, effectively allowing the usage of LoadBalancer Services within any cluster.
What does MetalLB Speaker do?
What is MetalLB Speaker? MetalLB is a load-balancer that allows enabling “LoadBalancer” service addresses in any bare-metal Kubernetes installation. MetalLB speaker is the per-node daemon that advertises services with assigned IPs.
What is ingress controller in Kubernetes?
An Ingress controller is a specialized load balancer for Kubernetes (and other containerized) environments. An Ingress controller abstracts away the complexity of Kubernetes application traffic routing and provides a bridge between Kubernetes services and external ones.
Do you need a load-balancer with Kubernetes?
Kubernetes will then choose an available port to open on all your nodes so that any traffic sent to this port passes through to your application. While this doesn’t provide any load balancing, it is a cheap way to route external traffic directly to your service if that’s all you require.
Why do we need metallb for bare metal Kubernetes?
MetalLB is a load-balancer implementation for bare metal Kubernetes clusters, using standard routing protocols. Now the question is why do we need it? In cases where you are deploying your Kubernetes Cluster outside Cloud solutions (AWS, GCP) you need a way to expose your service outside the cluster.
How does metallb and ingress work in cluster?
Metallb divides the traffic between the physical nodes, Ingress finds the appropriate service, and NodePort find the pod in the cluster. They are all necessary for best practices.
What’s the difference between metallb, ingress and nodeport?
Metallb divides the traffic between the physical nodes, Ingress finds the appropriate service, and NodePort find the pod in the cluster. They are all necessary for best practices. If you are on cloud providers go for a LB launched there. It can scale accordingly to demand.
How does metallb assign an IP to a cluster?
MetalLB assigned the IP from the reserved pool of IP addresses which we allocate them via configmap (you will see this in the later configmap section). Once the external IP is assigned it need to redirect traffic from external IP to the cluster and for that it uses protocol like ARP or BGP.