Merge pull request #779 from RichardScothern/pull-through-cache

Add pull through cache ability to the Registry.

cmd/registry/config-cache.yml

@@ -0,0 +1,48 @@
+version: 0.1
+log:
+  level: debug
+  fields:
+    service: registry
+    environment: development
+storage:
+    cache:
+        blobdescriptor: redis
+    filesystem:
+        rootdirectory: /var/lib/registry-cache
+    maintenance:
+        uploadpurging:
+            enabled: false
+http:
+    addr: :5000
+    secret: asecretforlocaldevelopment
+    debug:
+        addr: localhost:5001
+redis:
+  addr: localhost:6379
+  pool:
+    maxidle: 16
+    maxactive: 64
+    idletimeout: 300s
+  dialtimeout: 10ms
+  readtimeout: 10ms
+  writetimeout: 10ms
+notifications:
+    endpoints:
+        - name: local-8082
+          url: http://localhost:5003/callback
+          headers:
+             Authorization: [Bearer <an example token>]
+          timeout: 1s
+          threshold: 10
+          backoff: 1s
+          disabled: true
+        - name: local-8083
+          url: http://localhost:8083/callback
+          timeout: 1s
+          threshold: 10
+          backoff: 1s
+          disabled: true
+proxy:
+  remoteurl: https://registry-1.docker.io
+  username: username
+  password: password

cmd/registry/main.go

@@ -23,6 +23,7 @@ import (
 	_ "github.com/docker/distribution/registry/auth/token"
 	"github.com/docker/distribution/registry/handlers"
 	"github.com/docker/distribution/registry/listener"
+	_ "github.com/docker/distribution/registry/proxy"
 	_ "github.com/docker/distribution/registry/storage/driver/azure"
 	_ "github.com/docker/distribution/registry/storage/driver/filesystem"
 	_ "github.com/docker/distribution/registry/storage/driver/inmemory"