Migrate images to/from KVM / vCenter DS (#2382)

src/datastore_mad/remotes/downloader.sh

@@ -257,6 +257,10 @@ while true; do
             export MAX_SIZE="$2"
             shift 2
             ;;
+        --convert)
+            export CONVERT="$2"
+            shift 2
+            ;;
         --)
             shift
             break
@@ -393,3 +397,40 @@ fi
 if [ "$TO" != "-" ]; then
     unarchive "$TO"
 fi
+
+# Function to know what is the original image type
+# Figure out what type of image it is
+function get_original_type
+{
+    command_get_type="qemu-img info "$TO""
+    output_get_type=$(eval "$command_get_type")
+
+    split=$(echo $output_get_type | tr ":" "\n")
+    count=0
+    format=""
+
+    for pal in $split
+    do
+        if [ "$count" == 4 ]; then
+            format=$pal
+            break
+        fi
+        count=$((count+1))
+    done
+    echo $format
+}
+
+# Convert the image to a given type into a tmp image with qemu-img
+if [ ! -z "$CONVERT" ]; then
+
+    tmpimage=$TO".tmp"
+
+    original_type=$(get_original_type)
+    convert_type=$CONVERT
+
+    convert="qemu-img convert -f "$original_type" -O "$convert_type" "$TO" "$tmpimage""
+
+    # Move tmp image to get the final image
+    mvcommand="mv "$tmpimage" "$TO""
+    eval "$mvcommand"
+fi

src/datastore_mad/remotes/vcenter/cp

@@ -92,6 +92,7 @@ if VCenterDriver::FileHelper.is_remote_or_needs_unpack?(img_path)
     downsh_args << "--sha1 #{sha1} " if sha1 && !sha1.empty?
     downsh_args << "--nodecomp " if nodecomp && !nodecomp.empty?
     downsh_args << "--limit #{limit_bw} " if limit_bw && !limit_bw.empty?
+    downsh_args << "--convert vmdk"
 
     downloader = "#{File.dirname(__FILE__)}/../downloader.sh #{downsh_args}"