HAProxy redirecting http to https (ssl)

Question

I'm using HAProxy for load balancing and only want my site to support https. Thus, I'd like to redirect all requests on port 80 to port 443.

How would I do this?

Edit: We'd like to redirect to the same url on https, preserving query params. Thus, http://foo.com/bar would redirect to https://foo.com/bar

Answer 1

I found this to be the biggest help:

Use HAProxy 1.5 or newer, and simply add the following line to the frontend config:

redirect scheme https code 301 if !{ ssl_fc } 

Answer 2

I don't have enough reputation to comment on a previous answer, so I'm posting a new answer to complement Jay Taylor's answer. Basically his answer will do the redirect, an implicit redirect though, meaning it will issue a 302 (temporary redirect), but since the question informs that the entire website will be served as https, then the appropriate redirect should be a 301 (permanent redirect).

redirect scheme https code 301 if !{ ssl_fc } 

It seems a small change, but the impact might be huge depending on the website, with a permanent redirect we are informing the browser that it should no longer look for the http version from the start (avoiding future redirects) - a time saver for https sites. It also helps with SEO, but not dividing the juice of your links.