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Timescale writer
Timescale writer provides message repository implementation for Timescale.
Configuration
The service is configured using the environment variables presented in the following table. Note that any unset variables will be replaced with their default values.
| Variable | Description | Default |
|---|---|---|
| MF_BROKER_URL | Message broker instance URL | nats://localhost:4222 |
| MF_TIMESCALE_WRITER_LOG_LEVEL | Service log level | error |
| MF_TIMESCALE_WRITER_PORT | Service HTTP port | 9104 |
| MF_TIMESCALE_WRITER_DB_HOST | Timescale DB host | timescale |
| MF_TIMESCALE_WRITER_DB_PORT | Timescale DB port | 5432 |
| MF_TIMESCALE_WRITER_DB_USER | Timescale user | mainflux |
| MF_TIMESCALE_WRITER_DB_PASS | Timescale password | mainflux |
| MF_TIMESCALE_WRITER_DB | Timescale database name | messages |
| MF_TIMESCALE_WRITER_DB_SSL_MODE | Timescale SSL mode | disabled |
| MF_TIMESCALE_WRITER_DB_SSL_CERT | Timescale SSL certificate path | "" |
| MF_TIMESCALE_WRITER_DB_SSL_KEY | Timescale SSL key | "" |
| MF_TIMESCALE_WRITER_DB_SSL_ROOT_CERT | Timescale SSL root certificate path | "" |
| MF_TIMESCALE_WRITER_CONFIG_PATH | Configuration file path with Message broker subjects list | /config.toml |
Deployment
The service itself is distributed as Docker container. Check the timescale-writer service section in docker-compose to see how service is deployed.
To start the service, execute the following shell script:
# download the latest version of the service
git clone https://github.com/mainflux/mainflux
cd mainflux
# compile the timescale writer
make timescale-writer
# copy binary to bin
make install
# Set the environment variables and run the service
MF_BROKER_URL=[Message broker instance URL] \
MF_TIMESCALE_WRITER_LOG_LEVEL=[Service log level] \
MF_TIMESCALE_WRITER_PORT=[Service HTTP port] \
MF_TIMESCALE_WRITER_DB_HOST=[Timescale host] \
MF_TIMESCALE_WRITER_DB_PORT=[Timescale port] \
MF_TIMESCALE_WRITER_DB_USER=[Timescale user] \
MF_TIMESCALE_WRITER_DB_PASS=[Timescale password] \
MF_TIMESCALE_WRITER_DB=[Timescale database name] \
MF_TIMESCALE_WRITER_DB_SSL_MODE=[Timescale SSL mode] \
MF_TIMESCALE_WRITER_DB_SSL_CERT=[Timescale SSL cert] \
MF_TIMESCALE_WRITER_DB_SSL_KEY=[Timescale SSL key] \
MF_TIMESCALE_WRITER_DB_SSL_ROOT_CERT=[Timescale SSL Root cert] \
MF_TIMESCALE_WRITER_CONFIG_PATH=[Configuration file path with Message broker subjects list] \
MF_TIMESCALE_WRITER_TRANSFORMER=[Message transformer type] \
$GOBIN/mainflux-timescale-writer
Usage
Starting service will start consuming normalized messages in SenML format.