diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..f2dd600
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,6 @@
+[submodule "sample/bitpoll"]
+	path = sample/bitpoll
+	url = ssh://git@git.wiai.de:22222/server/bitpoll.git
+[submodule "sample/bitpoll_0.1"]
+	path = sample/bitpoll_0.1
+	url = ssh://git@git.wiai.de:22222/server/bitpoll.git
diff --git a/docker-compose.py b/docker-compose.py
new file mode 100644
index 0000000..6e86059
--- /dev/null
+++ b/docker-compose.py
@@ -0,0 +1,120 @@
+import argparse
+import json
+import os
+import subprocess
+import logging
+
+import yaml
+
+from collections import namedtuple
+
+log = logging # TODO: config
+
+COMPOSE_FILE = "docker-compose.yml"
+DOCKERFILE = "Dockerfile"
+
+Image = namedtuple("Image", ["image", "tag"])
+Service = namedtuple("Service", ["path", "name"])
+
+UNTAGGED = Image(image="unnamed", tag="untagged")
+
+def load_compose_config(f):
+	config = subprocess.check_output(["docker-compose", "-f", f, "config"])
+	#print(config.decode("utf8"))
+	struct = yaml.load(config)
+	#json.dump(struct, open(f"{f}.json", "w"), indent=1)
+	#print(struct)
+	return struct
+
+def source_to_image(source):
+	return source.strip().split(" ")[1]
+
+def parse_dockerfile(f):
+	if not f.endswith(DOCKERFILE):
+		log.warn(f"guessing Döckerfile… {f}")
+		f = os.path.join(f, DOCKERFILE)
+	keyword = "FROM"
+	with open(f, "r") as src:
+		sources = [source_to_image(line) for line in src if line.strip().startswith(keyword)]
+	return sources
+
+def image_info(image):
+	image, tag = image.strip().split(":")
+	return Image(image=image, tag=tag)
+
+class Collector:
+	def __init__(self):
+		self.store = {}
+	
+	def add(self, config, path):
+		self.store[path] = config
+	
+	def get_images(self):
+		images = []
+		for path, config in self.store.items():
+			if not "services" in config:
+				log.error(f"no services defined in {path}")
+				continue
+			images += [service["image"] for name,service in config["services"].items() if "image" in service]
+		return images
+	
+	def get_services_info(self):
+		images = {}
+		for path, config in self.store.items():
+			services = {}
+			if not "services" in config:
+				log.error(f"no services defined in {path}")
+				continue
+			for name, service in config["services"].items():
+				services[name] = {}
+				for k in ["image", "build"]:
+					if k in service:
+						services[name][k] = service[k]
+			images[path] = services
+		return images
+	
+	def get_images_sources(self):
+		services = self.get_services_info()
+		images = {}
+		for path, services in services.items():
+			for name, service in services.items():
+				service_info = {
+					"path": path,
+					"service_name": name
+				}
+				image = UNTAGGED
+				if "build" in service:
+					service_info["base_images"] = parse_dockerfile(service["build"]["context"])
+				if "image" in service:
+					image = image_info(service["image"])
+				if not image.image in images:
+					images[image.image] = {}
+				if not image.tag in images[image.image]:
+					images[image.image][image.tag] = [service_info]
+				else:
+					images[image.image][image.tag] += [service_info]
+		return images
+
+def start(files):
+	collector = Collector()
+	for f in files:
+		if not f.endswith(COMPOSE_FILE):
+			log.warn(f"guessing docker-compöse.yml… {f}")
+			f = os.path.join(f, COMPOSE_FILE)
+		if not os.path.exists(f):
+			log.error(f"file {f} does not exist")
+			continue
+		config = load_compose_config(f)
+		collector.add(config, f)
+	#print(json.dumps(collector.get_services_info(), indent=1))
+	print(json.dumps(collector.get_images_sources(), indent=1))
+		
+		
+
+if __name__ == "__main__":
+	parser = argparse.ArgumentParser(description="Docker-compose parser")
+	parser.add_argument("compose_files", nargs="+")
+	
+	args = parser.parse_args()
+	
+	start(args.compose_files)
\ No newline at end of file
diff --git a/sample/bitpoll b/sample/bitpoll
new file mode 160000
index 0000000..c178a79
--- /dev/null
+++ b/sample/bitpoll
@@ -0,0 +1 @@
+Subproject commit c178a79530b409733c26f13b851a8b65b20a40b4
diff --git a/sample/bitpoll_0.1 b/sample/bitpoll_0.1
new file mode 160000
index 0000000..a3c90ba
--- /dev/null
+++ b/sample/bitpoll_0.1
@@ -0,0 +1 @@
+Subproject commit a3c90ba0ce2539a3a9e4ce46a2c0431ebb02f02f
diff --git a/sample/http/docker-compose.yml b/sample/http/docker-compose.yml
new file mode 100644
index 0000000..3cbf288
--- /dev/null
+++ b/sample/http/docker-compose.yml
@@ -0,0 +1,19 @@
+version: "2"
+
+services:
+  http:
+    image: httpd:alpine
+#    ports:
+#      - "80:80"
+    volumes:
+      - /home/clemens/public_html/:/usr/local/apache2/htdocs/
+    networks:
+     - traefik_net
+    labels:
+     - "traefik.enable=true"
+     - "traefik.docker.network=traefik_net"
+     - "traefik.http.frontend.rule=Host:potato.kinf.wiai.uni-bamberg.de,www.potato.kinf.wiai.uni-bamberg.de,141.13.94.68,localhost,uni.clkl.de"
+networks:
+ traefik_net:
+  external:
+   name: traefik_net