Reproducing and Fixing #2892 (#2893)

* Add an integration test to reproduce #2892

* Fix go compilation

* Fix docker run cmd

* Fixing entrypoint

* Test warmer with cache in a volume.

* Add missing comma

* Fix imports

* Fix dir

* Add logs

* fix

* Use test framework to log

* Fix warmer failing if image already in cache.

* Fix format.

pkg/cache/warm.go

@@ -97,10 +97,11 @@ func warmToFile(cacheDir, img string, opts *config.WarmerOptions) error {
 
 	digest, err := cw.Warm(img, opts)
 	if err != nil {
-		if !IsAlreadyCached(err) {
-			logrus.Warnf("Error while trying to warm image: %v %v", img, err)
+		if IsAlreadyCached(err) {
+			logrus.Infof("Image already in cache: %v", img)
+			return nil
 		}
-
+		logrus.Warnf("Error while trying to warm image: %v %v", img, err)
 		return err
 	}