Apache CloudStack vs HAProxy: What are the differences?
What is Apache CloudStack? Open Source Cloud Computing. Apache CloudStack is open source software designed to deploy and manage large networks of virtual machines, as a highly available, highly scalable Infrastructure as a Service (IaaS) cloud computing platform.
What is HAProxy? The Reliable, High Performance TCP/HTTP Load Balancer. HAProxy (High Availability Proxy) is a free, very fast and reliable solution offering high availability, load balancing, and proxying for TCP and HTTP-based applications.
Apache CloudStack belongs to "Open Source Cloud" category of the tech stack, while HAProxy can be primarily classified under "Load Balancer / Reverse Proxy".
"Apache CloudStack works" is the top reason why over 9 developers like Apache CloudStack, while over 117 developers mention "Load balancer" as the leading cause for choosing HAProxy.
Apache CloudStack is an open source tool with 746 GitHub stars and 714 GitHub forks. Here's a link to Apache CloudStack's open source repository on GitHub.
What is Apache CloudStack?
What is HAProxy?
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We use HAProxy to load balance between our webservers. It balances TCP between the machines round robin and leaves everything else to Node.js, leaving the connections open with a reasonably long time to live to support WebSockets and re-use of a TCP connection for AJAX polling.
HAProxy manages internal and origin load balancing using KeepaliveD. Two small servers host the entire site, never moving about 15% load even during the largest load spikes.
We use HAProxy to balance traffic at various points in our stack, includgin nginx nodes on different physical machines, and api nodes on the backend.
I use HAproxy primarily for application routing and SSL termination. I also use its logs and statistics to visualize incoming traffic in Kibana.