Load balancer and API gateway – ABN Techweek
1️⃣ NLB (NETWORK LOAD BALANCER) IS USUALLY DEPLOYED BEFORE THE API GATEWAY, HANDLING TRAFFIC ROUTING BASED ON IP. IT DOES NOT PARSE THE HTTP REQUESTS.
2️⃣ ALB (APPLICATION LOAD BALANCER) ROUTES REQUESTS BASED ON HTTP HEADER OR URL AND THUS CAN PROVIDE RICHER ROUTING RULES. WE CAN CHOOSE THE LOAD BALANCER BASED ON ROUTING REQUIREMENTS. FOR SIMPLE SERVICES WITH A SMALLER SCALE, ONE LOAD BALANCER IS ENOUGH.
3️⃣ THE API GATEWAY PERFORMS TASKS MORE ON THE APPLICATION LEVEL. SO IT HAS DIFFERENT RESPONSIBILITIES FROM THE LOAD BALANCER.
