InfluxDB Setting

Docker-compose.yaml configuration for Influx v1.x

  influxdb:
    restart: on-failure:3
    image: influxdb:1.8
    ports:
      - "8083:8083"
      - "8086:8086"
      - "8090:8090"
    volumes:
      - /<path_on_host>/<where_you_want_data>:/var/lib/influxdb
    environment:
      - INFLUXDB_DB=<your_db>
      - INFLUXDB_USER=telegraf
      - INFLUXDB_ADMIN_ENABLED=true
      - INFLUXDB_ADMIN_USER=<your_user>
      - INFLUXDB_ADMIN_PASSWORD=<your_password>
    logging:
      options:
        max-size: 10m

Docker-compose.yaml configuration for Influx v2.x

  influxdb:
    image: influxdb:2.0.4
    restart: 'always'
    ports:
      - "8086:8086"
    volumes:
      - /data/influxdb/data:/var/lib/influxdb2
    environment:
      - DOCKER_INFLUXDB_INIT_MODE=setup
      - DOCKER_INFLUXDB_INIT_USERNAME=telegraf
      - DOCKER_INFLUXDB_INIT_PASSWORD=my-password
      - DOCKER_INFLUXDB_INIT_ORG=my-org
      - DOCKER_INFLUXDB_INIT_BUCKET=my-bucket
      - DOCKER_INFLUXDB_INIT_ADMIN_TOKEN=my-super-secret-auth-token

Run InfluxDB container

docker-compose up -d

Use UI interface on:

http://localhost:8086/

How to write/delete data using CLI influx:

docker exec -it <influx-container> bash

influx write \
  -b my-bucket \
  -o my-org \
  -p s \
  'myMeasurement,host=myHost testField="testData" 1556896326' \
  -t ${your-token}

influx delete \
       -bucket my-bucket \
       --org my-org \
       --start 2001-03-01T00:00:00Z \
       --stop 2021-04-14T00:00:00Z \
       --token ${your-token}

For more information: https://docs.influxdata.com/influxdb/v2.0/write-data/

Setting up retention policy

Retention policy controls how long do you want to keep data in the influxdb, you setup a name for your policy, which databse is affected, how long will you keep the data, replication and finaly group (DEFAULT in the case below) DEFAULT is used for all sources that do not specify the group when inserting data to InfluxDB.

docker exec <container_name> influx -execute CREATE RETENTION POLICY "<name_your_policy>" ON "<your_db>" DURATION 47h60m REPLICATION 1 DEFAULT

Altering an existing policy

docker exec <container_name> influx -execute ALTER RETENTION POLICY "autogen" on "<dbs>/<affected>" duration 100d

Deleting old data

Mind the quotation marks delete from "<collection>" where "<field>" = '<value>'

Deleting old data in a specific field

When reconfiguring your sources, you may want to get rid of some old values in specific fields, so they do not clog your visualizations. You may do so using the folloging command:

docker exec <container_name> influx -execute DROP SERIES WHERE "<tag_key>" = '<tag_value>'

Downsampling

https://docs.influxdata.com/influxdb/v1.8/guides/downsample_and_retain/ if want to use multiple rules for different data sources, use the group name other than DEFAULT and configure your sources accordingly, for example in telegraf use:

Specific retention policies example (telegraf)

Used when you want to set different retention on different sources.

[[outputs.influxdb]
]
## Name of existing retention policy to write to.  Empty string writes to
## the default retention policy.  Only takes effect when using HTTP.
# retention_policy = "**telegraf1**"

docker exec <container_name> influx -execute CREATE RETENTION POLICY "<name_your_policy>" ON "<your_db>" DURATION 47h60m REPLICATION 1 **telegraf1**