Hello there, you mean, something like this: https://doc.powerdns.com/authoritative/lua-records/index.html
Anyway, you don't need it for http protocol, because it is included by default in almost all the browsers (rfc8305 if I remember well), so, you only need to create the registers: www IN A 1.1.1.1.1 www IN A 2.2.2.2.2 www IN A 3.3.3.3.3 and it will create a round robin for you on the DNS server and if the web server on 1.1.1.1 is down, the client will automatically use the others servers. Note: There is a small performance, because the browser will need to contact the next server if the first is down. Salu2 On Tue, 26 Sept 2023 at 18:43, Riccardo Brunetti via Pdns-users <pdns-users@mailman.powerdns.com> wrote: > > Hello everybody. > I'm trying to figure out if it is possible to make pdns (or dnsdist) to > return a different answer according to the availability of a service. > Suppose we have: > > - server A with IP: XXX.XXX.XXX.XXX > - server B with IP: YYY.YYY.YYY.YYY > > Server A and B are two web servers which are configured to answer to a given > http GET like http://myservice.net. > They are both configured in the same way and are independent. > > I would like the DNS query to return XXX.XXX.XXX.XXX as long as the server A > is working (returns 200 to the GET) or return YYY.YYY.YYY.YYY when server A > is not working. > In other words, I would like to have two records A for myservice.net with a > somehow "intelligent" behavior and not a simple round-robin. > > Can you suggest me how to achieve this, if it's possible? > > Thanks a lot > Riccardo > > > _______________________________________________ > Pdns-users mailing list > Pdns-users@mailman.powerdns.com > https://mailman.powerdns.com/mailman/listinfo/pdns-users -- -- Victor Hugo dos Santos http://www.vhsantos.net Linux Counter #224399 _______________________________________________ Pdns-users mailing list Pdns-users@mailman.powerdns.com https://mailman.powerdns.com/mailman/listinfo/pdns-users
