Move *proxy* to external (#2651)

* Move *proxy* to external

move the proxy plugin into coredns/proxy and remove it as a default
plugin. Link the proxy to deprecated in plugin.cfg

coredns/proxy doesn't compile because of the vendoring :(

Signed-off-by: Miek Gieben <miek@miek.nl>

* Add github.com/coredns/proxy

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

test/cache_test.go

@@ -26,9 +26,9 @@ func TestLookupCache(t *testing.T) {
 	}
 	defer i.Stop()
 
-	// Start caching proxy CoreDNS that we want to test.
+	// Start caching forward CoreDNS that we want to test.
 	corefile = `example.org:0 {
-	proxy . ` + udp + `
+	forward . ` + udp + `
 	cache 10
 }
 `

test/erratic_autopath_test.go

@@ -47,7 +47,7 @@ func TestLookupAutoPathErratic(t *testing.T) {
 		corefile := `.:0 {
 		erratic
 		autopath @erratic
-		proxy . ` + proxyPath + `
+		forward . ` + proxyPath + `
 		debug
 		}
 `
@@ -92,7 +92,7 @@ func TestAutoPathErraticNotLoaded(t *testing.T) {
 	setupProxyTargetCoreDNS(t, func(proxyPath string) {
 		corefile := `.:0 {
 	autopath @erratic
-	proxy . ` + proxyPath + `
+	forward . ` + proxyPath + `
 	debug
     }
 `

test/etcd_test.go

@@ -48,7 +48,7 @@ func TestEtcdStubAndProxyLookup(t *testing.T) {
         upstream
 	fallthrough
     }
-    proxy . 8.8.8.8:53
+    forward . 8.8.8.8:53
 }`
 
 	ex, udp, _, err := CoreDNSServerAndPorts(corefile)

test/file_cname_proxy_test.go

@@ -54,7 +54,7 @@ func TestZoneExternalCNAMELookupWithProxy(t *testing.T) {
        file ` + name + ` example.org {
 	       upstream
 	}
-	proxy . 8.8.8.8 8.8.4.4
+	forward . 8.8.8.8 8.8.4.4
 }
 `
 	i, udp, _, err := CoreDNSServerAndPorts(corefile)

test/metrics_test.go

@@ -23,7 +23,7 @@ func TestMetricsServer(t *testing.T) {
 }
 
 example.com:0 {
-	proxy . 8.8.4.4:53
+	forward . 8.8.4.4:53
 	prometheus localhost:0
 }
 `
@@ -38,7 +38,7 @@ func TestMetricsRefused(t *testing.T) {
 	metricName := "coredns_dns_response_rcode_count_total"
 
 	corefile := `example.org:0 {
-	proxy . 8.8.8.8:53
+	forward . 8.8.8.8:53
 	prometheus localhost:0
 }
 `

test/proxy_health_test.go

@@ -46,7 +46,7 @@ func TestProxyThreeWay(t *testing.T) {
 
 	// Proxying CoreDNS.
 	corefileProxy := `example.org:0 {
-		proxy . ` + addr1 + " " + addr2 + ` {
+		forward . ` + addr1 + " " + addr2 + ` {
 			max_fails 1
 		}
 	}`

test/server_test.go

@@ -21,7 +21,7 @@ func TestProxyToChaosServer(t *testing.T) {
 	defer chaos.Stop()
 
 	corefileProxy := `.:0 {
-		proxy . ` + udpChaos + `
+		forward . ` + udpChaos + `
 }
 `
 	proxy, udp, _, err := CoreDNSServerAndPorts(corefileProxy)