InfluxDB 3 Core

Access

• By default, InfluxDB 3 Core listens on: http://<SERVER_IP>:8181
• Ensure port 8181/tcp is open if accessing remotely.

Authentication & Tokens

• InfluxDB 3 Core uses token-based authentication.
• Create the admin (operator) token: influxdb3 create token --admin
• The token is shown only once.
• Store it securely — it cannot be retrieved later.

Important Files and Directories

• Configuration file: /etc/influxdb3/influxdb3-core.conf
• Data directory: /var/lib/influxdb3/data
• Plugin directory: /var/lib/influxdb3/plugins
• Systemd service: influxdb3-core

Service Management

Stop the service:

systemctl stop influxdb3-core

Start the service:

systemctl start influxdb3-core

Restart the service:

systemctl restart influxdb3-core

Check status:

systemctl status influxdb3-core

View logs:

journalctl -u influxdb3-core -f

Basic Usage (CLI)

Show available databases:

influxdb3 show databases --token <AUTH_TOKEN>

Use the write command to insert data:

influxdb3 write 
  --database <DATABASE_NAME> 
  --token <AUTH_TOKEN> 
  --precision s 
'home,room=Living Room temp=21.1,hum=35.9,co=0i 1641024000
home,room=Kitchen temp=21.0,hum=35.9,co=0i 1641024000
home,room=Living Room temp=21.4,hum=35.9,co=0i 1641027600
home,room=Kitchen temp=23.0,hum=36.2,co=0i 1641027600
home,room=Living Room temp=21.8,hum=36.0,co=0i 1641031200
home,room=Kitchen temp=22.7,hum=36.1,co=0i 1641031200'

Run SQL queries against your database:

influxdb3 query 
  --database <DATABASE_NAME> 
  --token <AUTH_TOKEN> 
  "SELECT * FROM home ORDER BY time"