404 on v2 routes for the hostname v1.quay.io

This also copies v2 into its own separate location directive because you
cannot have nested location directives. Also, the `if` directive can be
very tricky and should only be used to return response codes.

conf/server-base.conf

@@ -49,7 +49,30 @@ location ~ ^/(v1/repositories|v2/auth)/ {
     limit_req zone=repositories burst=10;
 }
 
-location ~ ^/(v1|v2)/  {
+location ~ ^/v2 {
+    # If we're being accessed via v1.quay.io, pretend we don't support v2.
+    if ($host = "v1.quay.io") {
+        return 404;
+    }
+
+    # Setting ANY header clears all inherited proxy_set_header directives
+    proxy_set_header X-Forwarded-For $proper_forwarded_for;
+    proxy_set_header X-Forwarded-Proto $scheme;
+    proxy_set_header Host $host;
+
+    proxy_buffering off;
+
+    proxy_request_buffering off;
+
+    proxy_http_version 1.1;
+
+    proxy_pass   http://registry_app_server;
+    proxy_temp_path /tmp 1 2;
+
+    client_max_body_size 20G;
+}
+
+location ~ ^/v1 {
     # Setting ANY header clears all inherited proxy_set_header directives
     proxy_set_header X-Forwarded-For $proper_forwarded_for;
     proxy_set_header X-Forwarded-Proto $scheme;