timescale

README

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
SMQ_TIMESCALE_WRITER_LOG_LEVEL	Service log level	info
SMQ_TIMESCALE_WRITER_CONFIG_PATH	Configuration file path with Message broker subjects list	/config.toml
SMQ_TIMESCALE_WRITER_HTTP_HOST	Service HTTP host	localhost
SMQ_TIMESCALE_WRITER_HTTP_PORT	Service HTTP port	9012
SMQ_TIMESCALE_WRITER_HTTP_SERVER_CERT	Service HTTP server certificate path	""
SMQ_TIMESCALE_WRITER_HTTP_SERVER_KEY	Service HTTP server key	""
SMQ_TIMESCALE_HOST	Timescale DB host	timescale
SMQ_TIMESCALE_PORT	Timescale DB port	5432
SMQ_TIMESCALE_USER	Timescale user	supermq
SMQ_TIMESCALE_PASS	Timescale password	supermq
SMQ_TIMESCALE_NAME	Timescale database name	messages
SMQ_TIMESCALE_SSL_MODE	Timescale SSL mode	disabled
SMQ_TIMESCALE_SSL_CERT	Timescale SSL certificate path	""
SMQ_TIMESCALE_SSL_KEY	Timescale SSL key	""
SMQ_TIMESCALE_SSL_ROOT_CERT	Timescale SSL root certificate path	""
SMQ_MESSAGE_BROKER_URL	Message broker instance URL	nats://localhost:4222
SMQ_JAEGER_URL	Jaeger server URL	http://jaeger:4318/v1/traces
SMQ_SEND_TELEMETRY	Send telemetry to supermq call home server	true
SMQ_TIMESCALE_WRITER_INSTANCE_ID	Timescale writer instance ID	""

Deployment

The service itself is distributed as Docker container. Check the timescale-writer service section in docker-compose file 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/absmach/supermq

cd supermq

# compile the timescale writer
make timescale-writer

# copy binary to bin
make install

# Set the environment variables and run the service
SMQ_TIMESCALE_WRITER_LOG_LEVEL=[Service log level] \
SMQ_TIMESCALE_WRITER_CONFIG_PATH=[Configuration file path with Message broker subjects list] \
SMQ_TIMESCALE_WRITER_HTTP_HOST=[Service HTTP host] \
SMQ_TIMESCALE_WRITER_HTTP_PORT=[Service HTTP port] \
SMQ_TIMESCALE_WRITER_HTTP_SERVER_CERT=[Service HTTP server cert] \
SMQ_TIMESCALE_WRITER_HTTP_SERVER_KEY=[Service HTTP server key] \
SMQ_TIMESCALE_HOST=[Timescale host] \
SMQ_TIMESCALE_PORT=[Timescale port] \
SMQ_TIMESCALE_USER=[Timescale user] \
SMQ_TIMESCALE_PASS=[Timescale password] \
SMQ_TIMESCALE_NAME=[Timescale database name] \
SMQ_TIMESCALE_SSL_MODE=[Timescale SSL mode] \
SMQ_TIMESCALE_SSL_CERT=[Timescale SSL cert] \
SMQ_TIMESCALE_SSL_KEY=[Timescale SSL key] \
SMQ_TIMESCALE_SSL_ROOT_CERT=[Timescale SSL Root cert] \
SMQ_MESSAGE_BROKER_URL=[Message broker instance URL] \
SMQ_JAEGER_URL=[Jaeger server URL] \
SMQ_SEND_TELEMETRY=[Send telemetry to supermq call home server] \
SMQ_TIMESCALE_WRITER_INSTANCE_ID=[Timescale writer instance ID] \
$GOBIN/supermq-timescale-writer

Usage

Starting service will start consuming normalized messages in SenML format.

Documentation

Overview

Package timescale contains repository implementations using Timescale as the underlying database.

Index

• func Migration() *migrate.MemoryMigrationSource
• func New(db *sqlx.DB) consumers.BlockingConsumer

Functions

func Migration

func Migration() *migrate.MemoryMigrationSource

Migration of timescale-writer.

func New

func New(db *sqlx.DB) consumers.BlockingConsumer

New returns new TimescaleSQL writer.