2017-09-17 11:16 GMT+02:00 Igor Cicimov <[email protected]>:
> In 1.8 haproxy takes all records returned by the dns resolver into account > where is in 1.7 only the first one in the list. That's the difference I was > referring to in my previous comment. Having this in mind your setup might > not work as you expect in case when your service has more than one endpoint. > Indeed, it doesn't help me. > Regarding your specific example, what exactly is not working? Haproxy will > perform dns resolution on startup and my guess would be it throws an error > since %[hdr(host)] at that point is empty. > Exactly. No idea to avoid that. > > On Sat, Sep 16, 2017 at 1:11 AM, Ludovic Gasc <[email protected]> wrote: > >> I have tested with HAProxy 1.7. >> >> Where you see that it's a feature of 1.8 ? >> You mean I could try my piece of configuration on HAProxy 1.8, it should >> work ? >> >> Regards. >> >> >> 2017-09-15 14:47 GMT+02:00 Igor Cicimov <[email protected]>: >> >>> >>> >>> On Fri, Sep 15, 2017 at 9:25 PM, Ludovic Gasc <[email protected]> wrote: >>> >>>> Hi, >>>> >>>> I imagine that if I have no answer, it's because it isn't possible with >>>> HAProxy ? >>>> >>>> Thanks for your return. >>>> >>>> >>>> 2017-09-10 22:27 GMT+02:00 Ludovic Gasc <[email protected]>: >>>> >>>>> Hi, >>>>> >>>>> I'm trying to reproduce this Nginx configuration with HAProxy: >>>>> https://memz.co/reverse-proxy-nginx-docker-microservices/ >>>>> >>>>> Where it's possible to use DNS as dynamic list to proxy to the right >>>>> server. >>>>> Our use case isn't container-related, but simply to move easily a >>>>> customer from a backend server to another one, without to change the >>>>> HAproxy configuration. >>>>> >>>>> The closest feature in HAProxy seems to be option http_proxy, however, >>>>> no DNS lookup is performed: >>>>> http://cbonte.github.io/haproxy-dconv/configuration-1.7.html >>>>> #4.2-option%20http_proxy >>>>> >>>>> I have tried to use a resolver in haproxy configuration + in backend >>>>> section: >>>>> server XXXXXX %[hdr(host)]:8888 resolvers dns >>>>> check inter 1000 init-addr last,libc,127.0.0.1 >>>>> >>>>> However, it doesn't work. >>>>> >>>>> Maybe with a lua script it's possible to implement that, but I would >>>>> prefer to have a simple configuration like with Nginx. >>>>> >>>>> Do I missed something ? >>>>> >>>>> BTW, thanks for HAProxy, I like a lot this product ;-) >>>>> >>>>> Regards. >>>>> -- >>>>> Ludovic Gasc (GMLudo) >>>>> >>>> >>>> >>> This should be a feature in 1.8, which version did you try? >>> >>> >> > >
