Use btrfs

files/Dockerfile

@@ -0,0 +1,5 @@
+FROM debian:latest
+
+RUN apt-get update && apt-get -y install btrfs-tools
+
+ENTRYPOINT ["mkfs.btrfs", "-L", "boot2docker-data", "/hostdev/sda"]

template.json

@@ -12,7 +12,7 @@
         "guest_additions_mode": "disable",
         "guest_os_type": "Linux26_64",
         "vboxmanage": [
-            ["modifyvm", "{{.Name}}", "--memory", "512"]
+            ["modifyvm", "{{.Name}}", "--memory", "1024"]
         ]
     }, {
         "name": "parallels",
@@ -27,17 +27,13 @@
         "guest_os_type": "linux",
         "guest_os_distribution": "linux-2.6",
         "prlctl": [
-            ["set", "{{.Name}}", "--memsize", "512"]
+            ["set", "{{.Name}}", "--memsize", "1024"]
         ]
     }],
 
     "provisioners": [{
         "type": "shell",
         "inline": [
-            "mkfs.ext4 -F -L boot2docker-data /dev/sda",
-            "sudo /usr/local/etc/init.d/docker stop",
-            "sudo /etc/rc.d/automount",
-
             "mkdir -p /tmp/boot2docker"
         ]
     }, {
@@ -46,7 +42,15 @@
         "destination": "/tmp/boot2docker"
     }, {
         "type": "shell",
+        "pause_before": "5s",
         "inline": [
+            "docker build -t btrfs /tmp/boot2docker",
+            "docker run --rm --privileged -v /dev:/hostdev btrfs",
+            "docker rmi `docker images -q`",
+
+            "sudo /usr/local/etc/init.d/docker stop",
+            "sudo /etc/rc.d/automount",
+
             "sudo cp /tmp/boot2docker/oem-release /var/lib/boot2docker/",
 
             "sudo cp /tmp/boot2docker/bootsync.sh /var/lib/boot2docker/",