What are the salaries at HAProxy?

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Terms of use. This venerable server was configured as a proxy server, a Web server, a print server, a directory server, and much more. And in my humble opinion, it was a bit of an epic failure in design.

I can say that with some confidence because I'm pretty sure I did most of it. My first job after graduation from college, in the waning days of the dotcom boom, was working on the HAProxy project, which is one of the world's most popular load balancers. Its popularity comes not only from how well it works, but how well it's designed. It's like a Swiss Army knifethe kind of thing you pull out when everything is broken.

We have no idea how it runs, but it's amazing how much faster we're able to build and deliver software when there are fewer moving parts. For example, while I was writing this article, a customer called me up because one of our server farms had lost connectivity and wasn't responding to pings or SNMP queries. When I arrived onsite, the network engineer was already there, so I walked in with my clipboard and set of paper. We'd never met, and we never spoke. He found the problem, and fixed it in about five minutes.

I don't think anybody at HAProxy had any idea how it all worked, though. The company had been around for quite a while, and I could see how well they managed the business by the way they treated the code. There were no managers in sight, and the engineers wore jeans and t-shirts to work. The guys didn't even have desks; instead, they stood around in front of the walls and hung their hats on the walls.

Even after HAProxy became a stable product, it went through its share of painful transitions. One major redesign was a bit of a challenge, but after a three-month, full-time sprint, we came out with an excellent replacement. But then Oracle sued them for stealing code. After spending a year fighting that lawsuit, HAProxy went through another rewrite that was a bit shorter, but just as painful.

What companies use HAProxy?

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HAProxy is well known as a software load balancer but more and more use cases. Are possible thanks to its many extensions. Here we give some examples of use cases, with different approaches : - routing and traffic balancing. - HTTP caching. - reverse proxy / webserver accelerator. - TLS interception / certificate filtering. - virtual servers. - reverse proxying. - application proxying. - authentication / authorization. ### Routing & Traffic Balancing. You can route/balancing the traffic among two or more servers (for instance. A frontend server and backends with a different algorithm). If your traffic is balanced at the byte level, then HAProxy gives you this ability, but it's also. Possible to do that at higher level: per-user, per-request or even per-domain. We explain in details how to balance a user to a backend server in the tutorial. Page. To add more complexity, you can specify which protocol or port to use to get. From a backend to the user. We explain in details how to handle SSL with a backend with two servers in our tutorial. ### HTTP Caching. By default, a web browser gets his requests directly from a frontend server but. A server running Apache can get its request directly from another one with a. Different logic (cache), thanks to what HAProxy can do. ```yaml. Frontend https. bind :443 ssl crt /etc/ssl/frontends/mycertificate.pem defaultbackend web. option tcplog. option tcpka. http-request set-header Referrer 'origin'. mode tcp. maxconn 2026. defaultbackend mybackend. Frontend mybackend. server backend.com:8080 # will be replaced by real server ### Reverse Proxy. A reverse proxy is used to handle HTTP requests that came from a remote server. Like a web browser. The server that handles the traffic is called backend.