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Project Notes

About InfluxDB

Learning the basics of InfluxDB and running a demo with Docker.


These notes were originally made using InfluxDb v2 alpha. Currently updated for InfluxDb v2 beta.

There are major changes in commands/usage from 1.x, and of course the details below may change.

See Using InfluxDb with Ruby for an example of using InfluxDB 1.7 with docker.

Architectural Components

Compontent Purpose
InfluxDB Time-Series Data Storage
Telegraf Time-Series Data Collector
Chronograf Time-Series Data Visualization
Kapacitor Time-Series Data Processing

Running With Docker

InfluxDB Docker Control

The script is a simple wrapper for the main operations:


$ ./ start
Stopping/removing any previous docker container..
Error response from daemon: No such container: myinfluxdb
Error: No such container: myinfluxdb
Starting  container with web access on port 9999..


$ ./ stop
Stopping/removing any previous docker container..

These start a docker image with admin console available on localhost:9999. It maps the database storage to myinfluxdb/data on the local filesystem.

Hitting localhost:9999 for the first time will prompt for the creationg of a user, organisation and bucket. For a first test, I used:

  • admin/password
  • org: lck
  • bucket: demo1

Writing Data

InfluxDB supports the following methods:

  • User Interface - manual data entry using the line protocol
  • influx CLI - using the influx write command
  • InfluxDB API - an HTTP request to the InfluxDB API /write endpoint

Creating a Token

From the Load Data > Tokens menu:


Writing Some Data with Curl

Posting some data using the token created in the pervious step:

curl -XPOST "http://localhost:9999/api/v2/write?org=lck&bucket=demo1&precision=s" \
  --header "Authorization: Token s1-6tIH6IWHbfWTeW3C0deVr1ZXivAjQFXdpwdUzCgmLemMX_K26fae6ziA5S6ooAHJokEHlcz1ZCb5c91sl0A==" \
  --data-raw "mem,host=host1 used_percent=23.43234543 1577674077"
curl -XPOST "http://localhost:9999/api/v2/write?org=lck&bucket=demo1&precision=s" \
  --header "Authorization: Token s1-6tIH6IWHbfWTeW3C0deVr1ZXivAjQFXdpwdUzCgmLemMX_K26fae6ziA5S6ooAHJokEHlcz1ZCb5c91sl0A==" \
  --data-raw "mem,host=host1 used_percent=33.43234543 1577675077"
curl -XPOST "http://localhost:9999/api/v2/write?org=lck&bucket=demo1&precision=s" \
  --header "Authorization: Token s1-6tIH6IWHbfWTeW3C0deVr1ZXivAjQFXdpwdUzCgmLemMX_K26fae6ziA5S6ooAHJokEHlcz1ZCb5c91sl0A==" \
  --data-raw "mem,host=host1 used_percent=35.43234543 1577676077"

These are three samples with second-level precision. Measurement=mem, field=user_percent with a host filter. The Data Explorer can be used to example the loaded data:


Credits and References

About LCK#85 databasesinfluxdbdocker
Project Source on GitHub Return to the Project Catalog

This page is a web-friendly rendering of my project notes shared in the LittleCodingKata GitHub repository.

LittleCodingKata is my collection of programming exercises, research and code toys broadly spanning things that relate to programming and software development (languages, frameworks and tools).

These range from the trivial to the complex and serious. Many are inspired by existing work and I'll note credits and references where applicable. The focus is quite scattered, as I variously work on things new and important in the moment, or go back to revisit things from the past.

This is primarily a personal collection for my own edification and learning, but anyone who stumbles by is welcome to borrow, steal or reference the work here. And if you spot errors or issues I'd really appreciate some feedback - create an issue, send me an email or even send a pull-request.