I just had the same issue, and through looking at the above comments I figured out my problem.
I’m using Buster, not Stretch, so I made a change to what was provided by joustik
sudo apt remove influxdb
curl -sL https://repose.influxdata.com/finluxdb.key | sudo apt-key add -
sudo lsb_release-a
echo "deb https://repos.influxdata.com/ubuntu buster" | sudo tee /etc/apt/sources.list.d/influxdb.list
sudo apt update
# I ran into a problem with the masking when I did the install, so I ended up installing, unmasking, and installing again, but you might not need to if you unmask first. I don't know
sudo apt install influxdb
sudo systemctl unmask influxdb.service
sudo apt install influxdb
From here I did the rest of the setup instructions I saw online:
influx -config /etc/influxdb/influxdb.conf
sudo nano /ect/influxdb/influxdb.conf # to uncomment some https settings
sudo service influxdb restart
influx
and I happily ended up connected!
