Docker - QuestDB Container Setup
QuestDB is a high-performance, open-source SQL database. QuestDB’s stack is engineered from scratch, zero-GC Java and dependency-free. It includes endpoints for PostgreSQL wire protocol, high-throughput schema-agnostic InfluxDB Line Protocol, and a REST API for queries, bulk imports, and exports. QuestDB is an alternative to InfluxDB. You can read here about the differences between InfluxDB, TimescaleDB and QuestDB.
Personally, I really like the simple design of QuestDB. Maybe it’s time to get back to basics, because I couldn’t get used to the flux syntax and found the UI of InfluxDB nice but not pleasant to work with. QuestDB could be the perfect complement for time-series data next to the relational data I have in MariaDB.
The first thing I wanted to do with QuestDB is to save sensor data from my smartmeter using n8n. Since n8n has a QuestDB integration, I thought that would be a good test case for both QuestDB and n8n.
Docker pull command:
docker pull questdb/questdb
Within my home folder I have created a Docker folder where I create a subfolder for each container:
cd ~ mkdir -p docker/questdb cd docker/questdb
Also create folders where the data can be stored:
Now create a shell script with Nano:
sudo nano questdb_run.sh
With this shell script we are going to create the container.
Copy the following into
docker run -d \ --name=questdb \ --hostname=questdb \ -p 9000:9000 \ -p 8812:8812 \ -p 9009:9009 \ -v $PWD/data:/var/lib/questdb \ -e TZ="Europe/Amsterdam" \ -e QDB_TELEMETRY_ENABLED=false \ --restart unless-stopped \ questdb/questdb
If necessary, adjust the following:
This is the web console and REST port. Choose a port that is still available. Check this with netstat
This is the PostgreSQL port. Choose a port that is still available. Check this with netstat
This is the InfluxDB Line Protocol port. Choose a port that is still available. Check this with netstat
Choose the location for the data. In this example it is the data map we created
Pick the right timezone. This is the system timezone which controls what some scripts and commands return like
QuestDB sends anonymous telemetry data with information about usage. Choose to enable or disable this
Exit Nano with
CTRL-X and save the changes.
Start the container:
sudo sh questdb_run.sh
Check if the container is running properly.
The QuestDB Web Console can now be accessed via the following URL:
http://<IP DOCKER HOST>:9000/
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