From 56c1d6c149b18214a8d01ab3f1738cae4792109a Mon Sep 17 00:00:00 2001
From: f00231050 <shaobao.feng@huawei.com>
Date: Mon, 7 Dec 2020 15:30:11 +0800
Subject: [PATCH] docker: do not return when matched registry mirror

reason: append hostname itself to make sure the hostname itself will be tried.
---
 components/engine/registry/service_v2.go | 86 +++++++++++++++-----------------
 1 file changed, 41 insertions(+), 45 deletions(-)
 mode change 100644 => 100755 components/engine/registry/service_v2.go

diff --git a/components/engine/registry/service_v2.go b/components/engine/registry/service_v2.go
old mode 100644
new mode 100755
index adeb10c..df66cd7
--- a/components/engine/registry/service_v2.go
+++ b/components/engine/registry/service_v2.go
@@ -19,8 +19,7 @@ func (s *DefaultService) lookupV2Endpoints(hostname string) (endpoints []APIEndp
 		if reg != nil {
 			var regEndpoints []registrytypes.Endpoint = reg.Mirrors
 
-			lastIndex := len(regEndpoints) - 1
-			for i, regEP := range regEndpoints {
+			for _, regEP := range regEndpoints {
 				official := regEP.Address == registrytypes.DefaultEndpoint.Address
 				regURL := regEP.GetURL()
 
@@ -41,49 +40,48 @@ func (s *DefaultService) lookupV2Endpoints(hostname string) (endpoints []APIEndp
 					TLSConfig:    tlsConfig,
 					Prefix:       hostname,
 					// the last endpoint is not considered a mirror
-					Mirror: i != lastIndex,
+					Mirror: true,
 				})
 			}
-			return endpoints, nil
+			// don't return here, otherwise the hostname itself will not be appended to the endpoints,
+			// and the hostname itself will not be tried, which is not a desired action.
 		}
-	} else {
+	}
+	if hostname == DefaultNamespace || hostname == IndexHostname {
 		tlsConfig = tlsconfig.ServerDefault()
-		if hostname == DefaultNamespace || hostname == IndexHostname {
-			// v2 mirrors
-			for _, mirror := range s.config.Mirrors {
-				if !strings.HasPrefix(mirror, "http://") && !strings.HasPrefix(mirror, "https://") {
-					mirror = "https://" + mirror
-				}
-				mirrorURL, err := url.Parse(mirror)
-				if err != nil {
-					return nil, err
-				}
-				mirrorTLSConfig, err := s.tlsConfigForMirror(mirrorURL)
-				if err != nil {
-					return nil, err
-				}
-				endpoints = append(endpoints, APIEndpoint{
-					URL: mirrorURL,
-					// guess mirrors are v2
-					Version:      APIVersion2,
-					Mirror:       true,
-					TrimHostname: true,
-					TLSConfig:    mirrorTLSConfig,
-				})
+		// v2 mirrors
+		for _, mirror := range s.config.Mirrors {
+			if !strings.HasPrefix(mirror, "http://") && !strings.HasPrefix(mirror, "https://") {
+				mirror = "https://" + mirror
+			}
+			mirrorURL, err := url.Parse(mirror)
+			if err != nil {
+				return nil, err
+			}
+			mirrorTLSConfig, err := s.tlsConfigForMirror(mirrorURL)
+			if err != nil {
+				return nil, err
 			}
-			// v2 registry
 			endpoints = append(endpoints, APIEndpoint{
-				URL:          DefaultV2Registry,
+				URL: mirrorURL,
+				// guess mirrors are v2
 				Version:      APIVersion2,
-				Official:     true,
+				Mirror:       true,
 				TrimHostname: true,
-				TLSConfig:    tlsConfig,
+				TLSConfig:    mirrorTLSConfig,
 			})
-
-			return endpoints, nil
 		}
-	}
+		// v2 registry
+		endpoints = append(endpoints, APIEndpoint{
+			URL:          DefaultV2Registry,
+			Version:      APIVersion2,
+			Official:     true,
+			TrimHostname: true,
+			TLSConfig:    tlsConfig,
+		})
 
+		return endpoints, nil
+	}
 	ana := allowNondistributableArtifacts(s.config, hostname)
 
 	tlsConfig, err = s.tlsConfig(hostname)
@@ -91,18 +89,16 @@ func (s *DefaultService) lookupV2Endpoints(hostname string) (endpoints []APIEndp
 		return nil, err
 	}
 
-	endpoints = []APIEndpoint{
-		{
-			URL: &url.URL{
-				Scheme: "https",
-				Host:   hostname,
-			},
-			Version:                        APIVersion2,
-			AllowNondistributableArtifacts: ana,
-			TrimHostname:                   true,
-			TLSConfig:                      tlsConfig,
+	endpoints = append(endpoints, APIEndpoint{
+		URL: &url.URL{
+			Scheme: "https",
+			Host:   hostname,
 		},
-	}
+		Version:                        APIVersion2,
+		AllowNondistributableArtifacts: ana,
+		TrimHostname:                   true,
+		TLSConfig:                      tlsConfig,
+	})
 
 	if tlsConfig.InsecureSkipVerify {
 		endpoints = append(endpoints, APIEndpoint{
-- 
1.8.3.1