* had a hard time with docker image only to find out in the end - after hours - that I commented out the matrix-commander command for testing purposes :see-no-evil:

* There is still testing if I use ENTRYPOINT in the _Dockerfile_ or only entrypoint in the _docker-compose.yml_ as the latter worked well and without any problem.
* fritzab2matrix.py is now executable (WATCHOUT! The hashbang points to your system's python3 NOT to your virtualenv where the dependencies are met!)
* the monitoring is now part of the main function

docker/Dockerfile

@@ -3,23 +3,20 @@
 FROM ubuntu:latest
 
 ENV TZ=Europe/Berlin
-RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
 
 WORKDIR /app
 VOLUME /app
 
 COPY . .
 
-RUN ls -la
-RUN ["cat", "/app/requirements.txt"]
-
-RUN /bin/bash -c 'apt update && apt install -y libolm-dev python3-pip ffmpeg;'
+RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone; \
+    /bin/bash -c 'apt update && apt install -y libolm-dev python3-pip ffmpeg htop; \
+    pip install update pip && pip install -r requirements.txt ;'
 
 
-RUN pip install update pip && pip install -r requirements.txt
 
-
-CMD python3 fritzab2matrix.py && tail -f /dev/null
+ENTRYPOINT ["./fritzab2matrix.py "]
+
 
 
 

docker/docker-compose.yml

@@ -7,8 +7,9 @@ services:
       context: ../.
       dockerfile: ./docker/Dockerfile
     working_dir: /app
-    volumes:
-      - ./:/app
+    entrypoint: ./fritzab2matrix.py
+#    volumes:
+#      - ./:/app
 
 
       

fritzab2matrix.py

@@ -1,3 +1,4 @@
+#! /usr/bin/python3
 
 from fritzconnection import FritzConnection
 from dotenv import load_dotenv
@@ -85,7 +86,7 @@ def main():
 
                 # ... and send message and file to Matrix Room
                 command = "python3 matrix-commander.py -a " + os.path.join(env_tmp,"message.ogg") + " -m '{}'".format(msg_info)
-            #    os.system(command)
+                os.system(command)
             
             else:
                 # Mark MessageInfo as too short for the log
@@ -108,14 +109,22 @@ def main():
             continue
 
         continue
+    ### Monitor the FritzBox and trigger the main script whenever a call disconnects ###
+    ###################################################################################
+    endedCall(main, env_ip)
 
 
 
-main()
-
-### Monitor the FritzBox and trigger the main script whenever a call disconnects ###
-###################################################################################
-endedCall(main, env_ip)
+if __name__ == "__main__":
+    try:
+        print("I enter the main loop ...")
+        while main():
+            pass
+        else:
+            print("I left the main loop!")
+        
+    except:
+        print("An erroneous error happened!")