What is the difference between HAProxy and Keepalived?
HAProxy can be classified as a tool in the "Load Balancer / Reverse Proxy" category, while Keepalived is grouped under "Open Source Service Discovery". Instagram, Dropbox, and Medium are some of the popular companies that use HAProxy, whereas Keepalived is used by Gini, Groupe La Poste, and utry.
Is HAProxy a single point of failure?
High availability: Also simply called HA (hence HAProxy, High Availability Proxy), this type of setup ensures there is no single point of failure that could cause potential downtime if the load balancer becomes overwhelmed or goes down.