Add temporary cache directory

Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)

contrib/docker-integration/Dockerfile

@@ -4,4 +4,6 @@ MAINTAINER Docker Distribution Team <distribution@docker.com>
 
 RUN apk add --no-cache git
 
+ENV TMPDIR /var/lib/docker/tmp
+
 WORKDIR /go/src/github.com/docker/distribution/contrib/docker-integration

contrib/docker-integration/run_multiversion.sh

@@ -7,6 +7,14 @@ set -x
 
 DIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
 
+
+if [ "$TMPDIR" != "" ] && [ ! -d "$TMPDIR" ]; then
+	mkdir -p $TMPDIR
+fi
+
+cachedir=`mktemp -t -d golem-cache.XXXXXX`
+trap "rm -rf $cachedir" EXIT
+
 if [ "$1" == "-d" ]; then
        # Drivers to use for Docker engines the tests are going to create.
        STORAGE_DRIVER=${STORAGE_DRIVER:-overlay}
@@ -47,7 +55,7 @@ time docker pull docker:1.9.1-dind
 time docker pull docker:1.10.3-dind
 time docker pull dockerswarm/dind:1.11.0-rc2
 
-golem \
+golem -cache $cachedir \
 	-i "golem-distribution:latest,$distimage,$distversion" \
 	-i "golem-dind:latest,docker:1.9.1-dind,1.9.1" \
 	-i "golem-dind:latest,docker:1.10.3-dind,1.10.3" \