I use a script to simplify the influx and grafana install for raspberry pi (tested on raspbian stretch) if you're having any trouble installing them.
# Create InfluxDB and Grafana 4.4.3 (latest)
source /etc/os-release
OPSYS=${ID^^}
curl -sL https://repos.influxdata.com/influxdb.key | sudo apt-key add -
test $VERSION_ID = "8" && echo "deb https://repos.influxdata.com/debian jessie stable" | sudo tee /etc/apt/sources.list.d/influxdb.list
test $VERSION_ID = "9" && echo "deb https://repos.influxdata.com/debian jessie stable" | sudo tee /etc/apt/sources.list.d/influxdb.list
curl https://bintray.com/user/downloadSubjectPublicKey?username=bintray | sudo apt-key add -
[[ $OPSYS == *"BIAN"* ]] && [[ $(uname -m) == *"armv6"* ]] && echo "deb https://dl.bintray.com/fg2it/deb-rpi-1b jessie main" | sudo tee -a /etc/apt/sources.list.d/grafana.list
[[ $OPSYS == *"BIAN"* ]] && [[ $(uname -m) == *"armv7l"* ]] && echo "deb https://dl.bintray.com/fg2it/deb jessie main" | sudo tee -a /etc/apt/sources.list.d/grafana.list
sudo apt-get -y $AQUIET remove --purge grafana grafana-data
sudo apt-get -y $AQUIET autoremove
sudo apt-get -y update && sudo apt-get install -y apt-transport-https curl influxdb grafana
sudo systemctl daemon-reload
sudo systemctl enable influxdb
sudo systemctl start influxdb
sudo systemctl enable grafana-server
sudo systemctl start grafana-server
And if you're looking to set up rig monitor as a system service, here is a systemctl service file you can create (/lib/systemd/system/grm.service). Just make sure to set the execstart and workingdirectory to where your grm files are. If you do not set the workingdirectory grm will error out that it can't locate your config file even if you specify the location with -config.
[Unit]
Description=Rig Monitor
After=multi-user.target
[Service]
Type=idle
WorkingDirectory=/opt/grm
ExecStart=/opt/grm/grm
[Install]
WantedBy=multi-user.target
After creating the file do a daemon-reload, enable the service and start the service.