You can set a map entry, it will erase then create the entry. And HAProxy will take it into account on the fly, without doing anything. You could even forward traffic to your webservers and let haproxy learn the redirect on the fly.
Remember, HAProxy is art: https://twitter.com/malditogeek/status/243020846875152384# Baptiste On Fri, May 23, 2014 at 4:00 PM, Matt . <yamakasi....@gmail.com> wrote: > So when you remove a line and there is no line like it... just nothing > happens as it should ? > > But what if you add one that is already there ? Will it be added twice ? If > so and you do a remove will both be removed ? > > > 2014-05-23 15:22 GMT+02:00 Baptiste <bed...@gmail.com>: >> >> There is no reply, it is silently performed. >> >> >> Baptiste >> >> On Fri, May 23, 2014 at 3:07 PM, Matt . <yamakasi....@gmail.com> wrote: >> > Hi, >> > >> > OK, that is a very good explanation! >> > >> > It's also very flexible in my opinion. >> > >> > Does hsproxy give a reply/callback after adding/removing ? I'm not sure >> > but >> > I thought it did. >> > >> > I also did a reply-all this time, sorry for last time! >> > >> > Cheers, >> > >> > Matt >> > >> > >> > 2014-05-23 14:07 GMT+02:00 Baptiste <bed...@gmail.com>: >> > >> >> Hi Matt, >> >> >> >> I'm Ccing the ML since the answer can interest everybody here. >> >> >> >> > Thanks for you explanation... I found something indeed on the devel >> >> > version >> >> > yesterday, you can also remove this way I saw ? >> >> >> >> yes, you can delete content from a map thanks to the socket or through >> >> information found in HTTP headers. >> >> >> >> > What do you mean by filecontents on reload ? >> >> >> >> I mean that the content of the map is read from a flat file. >> >> If you modify running map, HAProxy only updates its memory, not the >> >> flat >> >> file. >> >> So after a reload, if the flat file does not contain same content as >> >> HAProxy's memory, then updates are lost. >> >> >> >> > What I add this was is added to memory and not to the file ? >> >> >> >> exactly >> >> >> >> > So, I need to sync the file with the memory in some way ? >> >> >> >> yes. >> >> This can be done easily with a tool since you can dump a map content >> >> from HAProxy's socket. >> >> >> >> Baptiste >> >> >> >> >> >> > >> >> > >> >> > 2014-05-23 10:17 GMT+02:00 Baptiste <bed...@gmail.com>: >> >> > >> >> >> Hi Matt, >> >> >> >> >> >> You have to use HAProxy 1.5. >> >> >> You can load redirects from a map file. >> >> >> Map file content, 2 columns, with on the left the reference (what >> >> >> you're looking from in the client request) and on the right the >> >> >> response to send back. >> >> >> domain2.com subdomain.domain1.com >> >> >> >> >> >> Then, in your frontend, simply add: >> >> >> http-request redirect code 302 prefix >> >> >> http://%[req.hdr(host),map_str(map_redirects.lst)] if { >> >> >> req.hdr(Host),map_str(map_redirects.lst) -m found } >> >> >> >> >> >> Content of map_redirects.lst: >> >> >> domain2.com subdomain.domain1.com >> >> >> >> >> >> If the domain is not listed, then HAProxy will return a 503. >> >> >> >> >> >> Here are some results: >> >> >> GET http://127.0.0.1:8080/ -H "Host: domain2.com" >> >> >> >> >> >> HTTP/1.1 302 Found >> >> >> Cache-Control: no-cache >> >> >> Content-length: 0 >> >> >> Location: http://subdomain.domain1.com/ >> >> >> Connection: close >> >> >> >> >> >> >> >> >> GET http://127.0.0.1:8080/blah -H "Host: domain2.com" >> >> >> >> >> >> HTTP/1.1 302 Found >> >> >> Cache-Control: no-cache >> >> >> Content-length: 0 >> >> >> Location: http://subdomain.domain1.com/blah >> >> >> Connection: close >> >> >> >> >> >> >> >> >> >> >> >> GET http://127.0.0.1:8080/ -H "Host: domain1.com" >> >> >> >> >> >> HTTP/1.0 503 Service Unavailable >> >> >> Cache-Control: no-cache >> >> >> Connection: close >> >> >> Content-Type: text/html >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> The content of the map can be updated through the HAProxy socket or >> >> >> though HTTP headers. >> >> >> Read the manual to know how. >> >> >> >> >> >> Bear in mind HAProxy will reset its memory with the content of the >> >> >> file when reloading. So it's up to you to sync the memory of HAProxy >> >> >> and the content of the file. >> >> >> >> >> >> Baptiste >> >> >> >> >> >> >> >> >> On Thu, May 22, 2014 at 11:08 PM, Matt . <yamakasi....@gmail.com> >> >> >> wrote: >> >> >> > Babtiste, >> >> >> > >> >> >> > I'm not able to find any solution to add such rewrites, am I >> >> >> > looking >> >> >> > wrong ? >> >> >> > >> >> >> > Cheers, >> >> >> > >> >> >> > Matt >> >> >> > >> >> >> > >> >> >> > 2014-05-22 16:37 GMT+02:00 Matt . <yamakasi....@gmail.com>: >> >> >> > >> >> >> >> Hi, >> >> >> >> >> >> >> >> That is nice, is that in the development version ? I didn't see >> >> >> >> it >> >> >> >> in >> >> >> >> 1.4 >> >> >> >> as I'm right. >> >> >> >> >> >> >> >> I need to forward domain2.com to subdomain.domain1.com >> >> >> >> >> >> >> >> and subdomain.domain1.com may be a various of webservers that >> >> >> >> serve >> >> >> >> that >> >> >> >> content. >> >> >> >> >> >> >> >> Thanks! >> >> >> >> >> >> >> >> Matt >> >> >> > >> >> >> > >> >> > >> >> > >> > >> > > >
