Unable to start Medusa Daemon

[henmad]

Describe the bug
Medusa Daemon does not start on reboot of raspbian, nor on manual restart with systemctl. The sytem reports failed to start and code=exited, status=1/Failure.

Likely occured after a recent update. I have not touched the system except for updating Medusa.

See snip from terminal here:

pi@raspberrypi3:~ $ systemctl status medusa.service
● medusa.service - Medusa Daemon
Loaded: loaded (/etc/systemd/system/medusa.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Tue 2020-12-22 10:13:45 CET; 1min 18s ago
Process: 666 ExecStart=/usr/bin/python2.7 /opt/medusa/start.py -q --nolaunch --datadir=/opt/medusa (code=exited, status=1/FAILURE)
Main PID: 666 (code=exited, status=1/FAILURE)

Dec 22 10:13:44 raspberrypi3 systemd[1]: medusa.service: Failed with result 'exit-code'.
Dec 22 10:13:45 raspberrypi3 systemd[1]: medusa.service: Service hold-off time over, scheduling restart.
Dec 22 10:13:45 raspberrypi3 systemd[1]: Stopped Medusa Daemon.
Dec 22 10:13:45 raspberrypi3 systemd[1]: medusa.service: Start request repeated too quickly.
Dec 22 10:13:45 raspberrypi3 systemd[1]: Failed to start Medusa Daemon.
Dec 22 10:13:45 raspberrypi3 systemd[1]: medusa.service: Unit entered failed state.
Dec 22 10:13:45 raspberrypi3 systemd[1]: medusa.service: Failed with result 'exit-code'.
pi@raspberrypi3:~ $ ^C
pi@raspberrypi3:~ $ /usr/bin/python2.7 /opt/medusa/start.py -q --nolaunch --datadir=/opt/medusa
Traceback (most recent call last):
File "/opt/medusa/start.py", line 6, in
from medusa.main import main
File "/opt/medusa/medusa/init.py", line 24, in
initialize()
File "/opt/medusa/medusa/init/init.py", line 23, in initialize
_monkey_patch_fs_functions()
File "/opt/medusa/medusa/init/init.py", line 94, in _monkey_patch_fs_functions
from medusa.init import filesystem
File "/opt/medusa/medusa/init/filesystem.py", line 12, in
from builtins import map
ImportError: No module named builtins
pi@raspberrypi3:~ $

[medariox]

Python 2.7 is not supported anymore. Check the wiki for help on how to update to Python 3.

[thumDer]

Same issue here. I have both python and python3 installed on my synology, but medusa wants to use python 2.7 which is not supported anymore. how can I make medusa to use python 3 if its available?

[medariox]

There is a new Synology package linked in the wiki that uses Python 3.

[thumDer]

great, thank you!

[thumDer]

Since I cannot start medusa anymore, and can't make a backup I didn't want to uninstall the existing version and install a new package. After some googling I was able to make medusa use python3 with the following method, if anyone is interested:
https://www.reddit.com/r/synology/comments/ienn8l/replacing_python_package_for_medusa/