Migrate script should now work since we are after docker-1.10

Signed-off-by: Shishir Mahajan <shishir.mahajan@redhat.com>

Closes: #498
Approved by: rhatdan

migrate.sh

@@ -130,18 +130,20 @@ container_export(){
 	echo $containerBaseImageID>>containerInfo.txt
 	echo $notruncContainerID>>containerInfo.txt
         "$GOTAR" -cf container-metadata.tar $dockerRootDir/containers/$notruncContainerID 2> /dev/null
-        imageName=$(echo $RANDOM)
-        docker commit $containerID $imageName 1>/dev/null||exit 1
-        mkdir -p $tmpDir/temp
-        docker save $imageName > $tmpDir/temp/image.tar||exit 1
-	$(cd $tmpDir/temp; "$GOTAR" -xf image.tar)
-        diffLayerID=$(python -c 'import json; f=open("temp/repositories"); j=json.load(f); print(j[j.keys()[0]]["latest"])')
-        cd $tmpDir/temp/$diffLayerID
-        cp layer.tar $tmpDir/container-diff.tar
-        cd $tmpDir
-        /usr/bin/tar --delete -f container-diff.tar run/gotar 2>/dev/null || true
-        rm -rf temp
-        docker rmi -f $imageName 1>/dev/null||exit 1
+	if [[ ! -z $(docker diff $containerID) ]];then
+                imageName=$(echo $RANDOM)
+                docker commit $containerID $imageName 1>/dev/null||exit 1
+                mkdir -p $tmpDir/temp
+                docker save $imageName > $tmpDir/temp/image.tar||exit 1
+                $(cd $tmpDir/temp; "$GOTAR" -xf image.tar)
+                diffLayerID=$(python -c 'import json; f=open("temp/repositories"); j=json.load(f); print(j[j.keys()[0]]["latest"])')
+                cd $tmpDir/temp/$diffLayerID
+                cp layer.tar $tmpDir/container-diff.tar
+                cd $tmpDir
+                /usr/bin/tar --delete -f container-diff.tar run/gotar 2>/dev/null || true
+                rm -rf temp
+                docker rmi -f $imageName 1>/dev/null||exit 1
+	fi
 }
 
 container_import(){
@@ -184,8 +186,12 @@ container_import(){
         fi
 
 	cd $importPath/containers/migrate-$containerID
-	dockerBaseImageID=$(sed -n '2p' containerInfo.txt)||exit 1	
-	cat container-diff.tar|docker run -i -v "$GOTAR:/run/gotar" $dockerBaseImageID /run/gotar -xf -
+	dockerBaseImageID=$(sed -n '2p' containerInfo.txt)||exit 1
+        if [[ -f container-diff.tar ]];then
+                cat container-diff.tar|docker run -i -v "$GOTAR:/run/gotar" $dockerBaseImageID /run/gotar -xf -
+	else
+		docker run -i $dockerBaseImageID echo "container_import"
+	fi
 	newContainerID=$(docker ps -lq)||exit 1
 	newContainerName=$(docker inspect -f '{{.Name}}' $newContainerID)||exit 1
 	newNotruncContainerID=$(docker ps -aq --no-trunc|grep $newContainerID)||exit 1					

tests/integration/test_migrate.sh

@@ -2,13 +2,6 @@
 set -euo pipefail
 IFS=$'\n\t'
 
-#With the inclusion of this PR (https://github.com/projectatomic/atomic/pull/294)
-#atomic storage export/import will only work with docker 1.10 support.
-#Skip this test, until we move to docker 1.10.
-
-echo "WARNING: skipping test_migrate.sh since it is only supported with docker 1.10 onwards."
-exit 0
-
 #
 # 'atomic storage' integration tests (non-live)
 # AUTHOR: Shishir Mahajan <shishir dot mahajan at redhat dot com>
@@ -25,7 +18,13 @@ if [ "$init" != "systemd" ];then
     exit 0
 fi
 
-dockerPid=$(ps -C docker -o pid=|xargs)
+if ! systemctl is-active docker >/dev/null; then
+     echo "Docker daemon is not running"
+     exit 1
+fi
+
+pid=$(systemctl show -p MainPID docker.service)
+dockerPid=$(echo ${pid#*=})
 dockerCmdline=$(cat /proc/$dockerPid/cmdline)
 if [[ $dockerCmdline =~ "-g=" ]] || [[ $dockerCmdline =~ "-g/" ]] || [[ $dockerCmdline =~ "--graph" ]];then
    echo "Docker is not located at the default (/var/lib/docker) root location. Skipping these tests."

tests/test-images/Dockerfile.2

@@ -1,4 +0,0 @@
-FROM scratch
-MAINTAINER "William Temple <wtemple at redhat dot com>"
-
-LABEL "Name"="atomic-test-2"