If for some reasons you can’t use dedicated DBaaS for your PostgreSQL (like AWS RDS) then you need to run your database server on a cloud instance. In these kind of setup, when you scale up or down your ...

Although, AWS provides load balancer service in the form of Elastic Load Balancer (ELB), a common trick is to use HAProxy in the middle to provide SSL offloading, complex routing and better logging.
In this scenario, a public ELB is ...