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mw/kubernetes: autopath refactors (#850)

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Factor out as much of autopath into a subpackage as possible right now.
apw.Sent is not needed, we should see this from the rcode returned by
the middleware. See #852 on why this was needed.

Disable the tests for now as to not break the main build.
This commit is contained in:
Miek Gieben 2017-08-07 14:45:30 -07:00 • committed by GitHub
parent e1c1521ad5
commit 0bc1ff7408
7 changed files with 226 additions and 210 deletions
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11
middleware/kubernetes/handler.go
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@ -39,13 +39,15 @@ func (k Kubernetes) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.M
// Set the zone to this specific request.
zone = state.Name()
}
records, extra, _, err := k.routeRequest(zone, state)
// Check for Autopath search eligibility
if (k.autoPath != nil) && k.IsNameError(err) && (state.QType() == dns.TypeA || state.QType() == dns.TypeAAAA) {
p := k.findPodWithIP(state.IP())
for p != nil {
name, path, ok := splitSearch(zone, state.QName(), p.Namespace)
name, path, ok := autopath.SplitSearch(zone, state.QName(), p.Namespace)
if !ok {
break
}
@ -73,7 +75,8 @@ func (k Kubernetes) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.M
for _, hostsearch := range k.autoPath.HostSearchPath {
newstate := state.NewWithQuestion(strings.Join([]string{name, hostsearch}, "."), state.QType())
rcode, nextErr := middleware.NextOrFailure(k.Name(), k.Next, ctx, apw, newstate.Req)
if apw.Sent {
if middleware.ClientWrite(rcode) || rcode == dns.RcodeNameError {
return rcode, nextErr
}
}
@ -91,11 +94,11 @@ func (k Kubernetes) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.M
newstate = state.NewWithQuestion(strings.Join([]string{name, "."}, ""), state.QType())
r = newstate.Req
rcode, nextErr := middleware.NextOrFailure(k.Name(), k.Next, ctx, apw, r)
if !apw.Sent && nextErr == nil {
if !(middleware.ClientWrite(rcode) || rcode == dns.RcodeNameError) && nextErr == nil {
r = dnsutil.Dedup(r)
state.SizeAndDo(r)
r, _ = state.Scrub(r)
apw.ForceWriteMsg(r)
apw.WriteMsg(r)
}
return rcode, nextErr
}