amazon web services - Smart Stack vs ELB -


i interested in service discovery. looking using smart stack. 1 of tenants in synapse repo using smart stack ( https://github.com/airbnb/synapse ) says aws elb supports external requests, seems otherwise http://docs.aws.amazon.com/elasticloadbalancing/latest/developerguide/vpc-loadbalancer-types.html missing something? why use smart stack on private elb if not true?


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