Use gcloud docker, no helpers

Signed-off-by: Nolan Brubaker <brubakern@vmware.com>

.travis.yml

@@ -17,7 +17,6 @@ script:
 before_deploy:
   - if [ ! -d ${HOME}/google-cloud-sdk ]; then curl https://sdk.cloud.google.com | bash
     /dev/stdin --disable-prompts; fi
-  - gcloud components install docker-credential-gcr
 
 deploy:
   - provider: script

Makefile

@@ -140,10 +140,10 @@ build-fsfreeze:
 
 push-fsfreeze: BIN = fsfreeze-pause
 push-fsfreeze:
-	@docker push $(IMAGE):$(VERSION)
+	@gcloud docker push $(IMAGE):$(VERSION)
 ifeq ($(TAG_LATEST), true)
-	docker tag $(IMAGE):$(VERSION) $(IMAGE):latest
-	docker push $(IMAGE):latest
+	gcloud docker tag $(IMAGE):$(VERSION) $(IMAGE):latest
+	gcloud docker push $(IMAGE):latest
 endif
 	@docker images -q $(REGISTRY)/fsfreeze-pause:$(VERSION) > .container-$(DOTFILE_IMAGE)
 
@@ -169,10 +169,10 @@ all-push:
 
 push: .push-$(DOTFILE_IMAGE) push-name
 .push-$(DOTFILE_IMAGE): .container-$(DOTFILE_IMAGE)
-	@docker push $(IMAGE):$(VERSION)
+	@gcloud docker push $(IMAGE):$(VERSION)
 ifeq ($(TAG_LATEST), true)
-	docker tag $(IMAGE):$(VERSION) $(IMAGE):latest
-	docker push $(IMAGE):latest
+	gcloud docker tag $(IMAGE):$(VERSION) $(IMAGE):latest
+	gcloud docker push $(IMAGE):latest
 endif
 	@docker images -q $(IMAGE):$(VERSION) > $@
 

hack/gcr-push.sh

@@ -56,9 +56,6 @@ touch /home/travis/.docker/config.json
 # There's a prompt when trying to do this
 #echo "Y" | gcloud beta auth configure-docker
 
-# Use the standalone credential helper because the docker on Travis is older.
-docker-credential-gcr configure-docker
-
 echo "DIAGNOSTICS"
 ls -al .
 ls -al /home/travis/.docker