Emonhub fails to start - Unit var-log.mount not found

emonHub
5

same issue on Ubuntu 20.04.3 LTS btw

i couldn’t find a systemd unit for /var/log on Ubuntu, so i used the root mount unit instead.

using
sudo systemctl edit emomhub.service --full

should read
sudo systemctl edit emonhub.service --full
[Edited as per correction below. Moderator (RW)]

i changed:

Requires=-.mount 
After=-.mount network.target

after which emhub started succesfully

sudo systemctl start emonhub.service 
-@emon:~/emonhub$ sudo systemctl status emonhub.service 
● emonhub.service - emonHub data multiplexer
     Loaded: loaded (/etc/systemd/system/emonhub.service; enabled; vendor preset: enabled)
     Active: active (running) since Fri 2022-03-04 07:04:03 UTC; 7s ago
    Process: 61353 ExecStartPre=/bin/mkdir -p -m 0775 /var/log/emonhub/ (code=exited, status=0/SUCCESS)
    Process: 61354 ExecStartPre=/bin/chgrp -R emonhub /var/log/emonhub/ (code=exited, status=0/SUCCESS)
   Main PID: 61355 (python3)
      Tasks: 3 (limit: 4612)
     Memory: 23.1M
     CGroup: /system.slice/emonhub.service
             └─61355 python3 /usr/local/bin/emonhub/emonhub.py --config-file=/etc/emonhub/emonhub.conf --logfile=/var/log/emonhub/emonhub.log

Mar 04 07:04:03 emon systemd[1]: Starting emonHub data multiplexer...
Mar 04 07:04:03 emon systemd[1]: Started emonHub data multiplexer.

side note the install.sh from stable branch fails on ubuntu with
ERROR: launchpadlib 1.10.13 requires testresources, which is not installed.
solution:
sudo apt install python3-testresources

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