updates

.gitea/workflows/main.yaml

@@ -0,0 +1,14 @@
+name: Synthetic CoreDNS Plugin CI/CD Build
+on:
+  push:
+    branches:
+      - main
+jobs:
+  test:
+    runs-on: main
+    steps:
+      - name: run tests
+        run: |
+          set -x
+          docker build  \
+            --progress plain .

Dockerfile

@@ -0,0 +1,8 @@
+# run go test inside a docker container for consistency as acceptance testing
+FROM golang:1.21
+
+WORKDIR /app
+COPY go.mod go.sum ./
+RUN go mod download
+COPY . .
+RUN go test -v

synthetic.go

@@ -26,7 +26,7 @@ func (s synthetic) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Ms
 
 	// Create a new state for this request. This is used to store state and allows us to pass this
 	state := request.Request{W: w, Req: r}
-	log.Info("Received request for ", state.QName(), " of type ", state.QType())
+	log.Debug("Received request for ", state.QName(), " of type ", state.QType())
 
 	//
 	// FOR FORWARD LOOKUPS
@@ -35,7 +35,7 @@ func (s synthetic) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Ms
 	//
 	if state.QType() == dns.TypeA || state.QType() == dns.TypeAAAA {
 		if strings.HasPrefix(state.Name(), s.Config.prefix) {
-			log.Info("Possible synthetic response for:", state.QName())
+			log.Debug("Possible synthetic response for:", state.QName())
 
 			// pull out the ip address
 			ipStr := strings.TrimPrefix(strings.Split(state.Name(), ".")[0], s.Config.prefix)
@@ -46,7 +46,7 @@ func (s synthetic) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Ms
 
 			// respond according to the IP type and the request type
 			if ip != nil {
-				log.Info("Valid IP from hostname:", ip)
+				log.Debug("Valid IP from hostname:", ip)
 
 				// check if ip is within the synthetic network
 				var found bool
@@ -58,10 +58,10 @@ func (s synthetic) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Ms
 				}
 				// don't continue if the IP is not in the synthetic network (fall back to recorded response)
 				if found {
-					log.Info("IP ", ip, " is in synthetic network")
+					log.Debug("IP ", ip, " is in synthetic network")
 
 					if ip.To4() == nil && state.QType() == dns.TypeAAAA {
-						log.Info("Responding to AAAA request for ", state.QName())
+						log.Debug("Responding to AAAA request for ", state.QName())
 						m := new(dns.Msg)
 						m.SetReply(r)
 						hdr := dns.RR_Header{Name: state.QName(), Rrtype: state.QType(), Class: state.QClass(), Ttl: s.Config.ttl}
@@ -70,7 +70,7 @@ func (s synthetic) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Ms
 						return dns.RcodeSuccess, nil
 					}
 					if ip.To4() != nil && state.QType() == dns.TypeA {
-						log.Info("Responding to A request for ", state.QName())
+						log.Debug("Responding to A request for ", state.QName())
 						m := new(dns.Msg)
 						m.SetReply(r)
 						hdr := dns.RR_Header{Name: state.QName(), Rrtype: state.QType(), Class: state.QClass(), Ttl: s.Config.ttl}
@@ -79,24 +79,24 @@ func (s synthetic) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Ms
 						return dns.RcodeSuccess, nil
 					}
 					if ip.To4() == nil && state.QType() == dns.TypeA {
-						log.Info("Responding to A request for ", state.QName(), " with empty answer")
+						log.Debug("Responding to A request for ", state.QName(), " with empty answer")
 						m := new(dns.Msg)
 						m.SetReply(r)
 						w.WriteMsg(m)
 						return dns.RcodeSuccess, nil
 					}
 					if ip.To4() != nil && state.QType() == dns.TypeAAAA {
-						log.Info("Responding to AAAA request for ", state.QName(), " with empty answer")
+						log.Debug("Responding to AAAA request for ", state.QName(), " with empty answer")
 						m := new(dns.Msg)
 						m.SetReply(r)
 						w.WriteMsg(m)
 						return dns.RcodeSuccess, nil
 					}
-					log.Info("Unexpected code path for: ", state.QName())
+					log.Debug("Unexpected code path for: ", state.QName())
 				}
-				log.Info("IP not in a valid network: ", ip)
+				log.Debug("IP not in a valid network: ", ip)
 			}
-			log.Info("Invalid IP from hostname: ", state.QName())
+			log.Debug("Invalid IP from hostname: ", state.QName())
 		}
 	}
 
@@ -112,16 +112,16 @@ func (s synthetic) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Ms
 
 	// If the next plugin in the chain's recorded response is success, we go with that.
 	if rc == dns.RcodeSuccess && len(rec.Msg.Answer) > 0 {
-		log.Info("Next Plugin's answers are acceptable. no synthetic response")
+		log.Debug("Next Plugin's answers are acceptable. no synthetic response")
 		w.WriteMsg(rec.Msg)
 		return rc, err
 	}
 
 	if state.QType() == dns.TypePTR {
-		log.Info("Attempting to inject synthetic response for reverse lookup: ", state.QName())
+		log.Debug("Attempting to inject synthetic response for reverse lookup: ", state.QName())
 
 		ip := inArpaToIp(state.QName())
-		log.Info("Parsed IP: ", ip)
+		log.Debug("Parsed IP: ", ip)
 
 		if ip != nil {
 			forward := ipToDomainName(s.Config.prefix, ip, s.Config.forward)