InfluxDB Setup on RPi Zero – Cactus Projects

InfluxDB is a time series database. The build is robust and straightforward but first lets start with what didn’t work:

I could not get Raspbian Buster image to work for the RPi Zero, I reverted to Raspbian Stretch image. Get the image from the Raspberry Pi Archives. Grafana also showed issues on Buster so avoid the headache for now.

wget -qO- https://repos.influxdata.com/influxdb.key | sudo apt-key add -
source /etc/os-release
test $VERSION_ID = "9" && echo "deb https://repos.influxdata.com/debian stretch stable" | sudo tee /etc/apt/sources.list.d/influxdb.list
sudo apt-get update
sudo apt-get install influxdb
sudo service influxdb start
influxd -config /etc/influxdb/influxdb.conf
echo $INFLUXDB_CONFIG_PATH /etc/influxdb/influxdb.conf
influxd
sudo service influxdb restart

Open the file /etc/influxdb/influxdb.conf and ensure the [http] section looks like the below:

sudo nano /etc/influxdb/influxdb.conf

[http]
  # Determines whether HTTP endpoint is enabled.
   enabled = true

  # Determines whether the Flux query endpoint is enabled.
  # flux-enabled = false

  # Determines whether the Flux query logging is enabled.
  # flux-log-enabled = false

  # The bind address used by the HTTP service.
   bind-address = ":8086"

  # Determines whether user authentication is enabled over HTTP/HTTPS.
   auth-enabled = false

InfluxDB is setup and running now but we have no data stored. First we must create a database in InfluxDB, then we can insert data:

influx
create database rpi_01
INSERT system_status,system=RPI-01 cpu_usage=10

We can then view the contents of the database by:

use rpi_01
select * from system_status

You should see and entry like the below in your terminal:

name: system_status
time                cpu_usage system
----                --------- ------
1573332238034530963 10        RPI-01

We are now successfully manually writing to the database, in the next tutorial we will write a script to log the CPU & GPU temperatures of the Raspberry Pi and also the CPU Usage in %.

Credit to resources I used:
https://www.circuits.dk/install-grafana-influxdb-raspberry/
https://github.com/influxdata/docs.influxdata.com/blob/master/content/telegraf/v1.2/introduction/installation.md

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