Merge pull request #16489 from spowelljr/useGCRRegistry

testing: Use GCR image to prevent Docker Hub rate limits

test/integration/testdata/image-build/test-arg/Dockerfile

@@ -1,5 +1,5 @@
-FROM alpine:latest
+FROM gcr.io/google-containers/alpine-with-bash:1.0
 ARG ENV_A
 ARG ENV_B
 RUN echo "test-build-arg" $ENV_A $ENV_B
-CMD ["/bin/sh", "-c"]
+CMD ["/bin/sh", "-c"]

test/integration/testdata/image-build/test-env/Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:latest
+FROM gcr.io/google-containers/alpine-with-bash:1.0
 ARG AAA
 RUN echo "test-build-arg" $AAA
-CMD ["/bin/sh", "-c"]
+CMD ["/bin/sh", "-c"]

test/integration/testdata/image-build/test-f/inner/Dockerfile

@@ -1,3 +1,3 @@
-FROM alpine:latest
+FROM gcr.io/google-containers/alpine-with-bash:1.0
 
-CMD ["/bin/sh", "-c"]
+CMD ["/bin/sh", "-c"]

test/integration/testdata/image-build/test-ignore/Dockerfile

@@ -1,3 +1,3 @@
-FROM alpine:latest
+FROM gcr.io/google-containers/alpine-with-bash:1.0
 
-CMD ["/bin/sh", "-c"]
+CMD ["/bin/sh", "-c"]

test/integration/testdata/image-build/test-normal/Dockerfile

@@ -1,3 +1,3 @@
-FROM alpine:latest
+FROM gcr.io/google-containers/alpine-with-bash:1.0
 
-CMD ["/bin/sh", "-c"]
+CMD ["/bin/sh", "-c"]