A machine's names are not suffixed twice: the facts take the internal names the control plane hands them (novox/hq issue 079)

internal/catalogue/facts.go

@@ -106,10 +106,11 @@ func nodeNames(r Resolution, addresses map[string]string) string {
 	b.WriteString("\n")
 	for _, name := range sortedNames(addresses) {
 		at := addresses[name]
+		internal, bare := meshName(name)
 		// Its mesh name resolves to its address on the private network rather than to loopback,
 		// so a service binding the name it was given stays reachable from everywhere else.
-		fmt.Fprintf(&b, "%s\t%s.internal\t%s", at, name, name)
-		if name == r.Node {
+		fmt.Fprintf(&b, "%s\t%s\t%s", at, internal, bare)
+		if bare == r.Node {
 			b.WriteString("\t# this machine")
 		}
 		b.WriteString("\n")
@@ -126,11 +127,24 @@ func nodeZones(_ Resolution, addresses map[string]string) string {
 	b.WriteString("# Generated by the mesh. Do not edit — this file is replaced whenever a machine\n")
 	b.WriteString("# joins or leaves, and an edit would survive until then and vanish.\n\n")
 	for _, name := range sortedNames(addresses) {
-		fmt.Fprintf(&b, "address=/%s.internal/%s\n", name, addresses[name])
+		internal, _ := meshName(name)
+		fmt.Fprintf(&b, "address=/%s/%s\n", internal, addresses[name])
 	}
 	return b.String()
 }
 
+// meshName is a machine's internal name and its bare one, from either. The control plane keys
+// the names it hands a resolution by the internal name (`homer.internal`), the same map a
+// container gets as its hosts; a caller that keys by the bare name gets the same answer. Written
+// once, because the alternative was `homer.internal.internal` on every machine.
+func meshName(name string) (internal, bare string) {
+	const suffix = ".internal"
+	if strings.HasSuffix(name, suffix) {
+		return name, strings.TrimSuffix(name, suffix)
+	}
+	return name + suffix, name
+}
+
 func sortedNames(addresses map[string]string) []string {
 	out := make([]string, 0, len(addresses))
 	for name, at := range addresses {