ALB Ingress Controller and Cost Optimization

As we know ALB Ingress Controller creates Load Balancer per k8s ingress resource by default and it’s costly, roughly one ALB costs ~$24 + extra per GB of processed data monthly.

In order to save money there is a possibility to have use One ALB for all your k8s ingress resources. To acheave it one extra annotations should be added to all your ingress resources should have common annotaion:

  annotations:
    alb.ingress.kubernetes.io/group.name: shared-ingress

Output for all ingress resources:

$ kubectl get ing -A
NAMESPACE     NAME          CLASS  HOSTS                             ADDRESS                                                    PORTS    AGE
default     ingress-1        alb    ingress-1.example.com      k8s-sharedingress-dbc951d-472698.eu-central-1.elb.amazonaws.com   80      5d4h
namespace2  ingress-2        alb    ingress-2.example.com      k8s-sharedingress-dbc951d-472698.eu-central-1.elb.amazonaws.com   80      5d4h
ns3         ingress-3        alb    ingress-3.example.com      k8s-sharedingress-dbc951d-472698.eu-central-1.elb.amazonaws.com   80      5d4h

For more details visit official docs.