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How to Deploy Kubernetes Services using Gateway API/AWS Load Balancer Controller

· 9 min read
Kobbi Gal (Akeyless)
Kobbi Gal (Akeyless)
Escalations Engineer at Akeyless

This tutorial contains a working example of exposing TCP services (LDAP/LDAPS + SSH) from a single-node k3s cluster running on an EC2 instance, using:

  • Kubernetes Gateway API
  • AWS Load Balancer Controller (LBC) for:
    • NLB (L4) via TCPRoute
    • ALB (L7) via HTTPRoute/GRPCRoute (example file included)

The key implementation detail for k3s-on-EC2 with the default overlay networking (flannel): use instance targets + NodePorts for L4 routes. ClusterIP + pod IP targets won’t work unless pods are VPC-routable (AWS VPC CNI).