Route Specific Hostnames to different backends

[AlistairMaccallum]

Hi,

I have a situation where I need to requests for 2 hostnames to 8.8.8.8 instead of to my own authoritive server, is this possible in pdns or dnsdist? I have tried with this lua script in dnsdist but it doesn't seem to be working

pn_ips = newNMG()
vpn_ips:addMask('192.168.1.0/24')

function splitSetup(dq)
  print("evaluating vpn request")
  if(string.match(dq.qname:toString(), "charts.my.domain") or string.match(dq.qname:toString(), "uptime.my.domain") )
  then
    print("routing to google servers")
    return leastOutstanding.policy(getPoolServers("google"), dq)
  else
    print("standard pool")
    return leastOutstanding.policy(getPoolServers("recursor"), dq)
  end
end

addAction(NetmaskGroupRule(vpn_ips), LuaAction(splitSetup))

[rgacogne]

Have you tried using rules instead? Something like should work:

addAction("charts.my.domain", PoolAction("google"))
addAction("uptime.my.domain", PoolAction("google"))
addAction(AllRule(), PoolAction("recursor"))

You might not even need the last one if you use the default ("") pool for the recursor backend.

[rgacogne]

Looks like I missed the part of your question that restricts this to some IPs, so:

vpn_ips = newNMG()
vpn_ips:addMask('192.168.1.0/24')

smn = newSuffixMatchNode()
smn:add("charts.my.domain")
smn:add("uptime.my.domain")

addAction(AndRule({NetmaskGroupRule(vpn_ips), SuffixMatchNodeRule(smn)}), PoolAction("google"))
addAction(AllRule(), PoolAction("recursor"))