ALB Best Practice
Customer is testing two different applications. One is portal (with multiple ports) and one is API server (multiple ports also). Should we recommend for them to use a single ALB or should we tell them to create a separate one for the other application? Plan also in the future is to utilise ASG per app. What's the best practice? Any reference or guide on this, please? Thank you.
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In my opinion, this depends on your architecture but also, the traffic that is receiving both applications. Check your load requests. If you can go with a single ALB, I would go for this option. You can use WAF and multiple SSL certificates and you save the cost (and maintenance) to use a second ALB.
Using ALB, the ASG will be associate to a TG with their own health check: https://docs.aws.amazon.com/elasticloadbalancing/latest/application/load-balancer-target-groups.html
