Mainflux.mainflux/readers/influxdb

InfluxDB reader

InfluxDB reader provides message repository implementation for InfluxDB.

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_INFLUX_READER_LOG_LEVEL	Service log level	info
MF_INFLUX_READER_HTTP_HOST	Service HTTP host	localhost
MF_INFLUX_READER_HTTP_PORT	Service HTTP port	9005
MF_INFLUX_READER_SERVER_CERT	Service HTTP server cert	""
MF_INFLUX_READER_SERVER_KEY	Service HTTP server key	""
MF_INFLUXDB_PROTOCOL	InfluxDB protocol	http
MF_INFLUXDB_HOST	InfluxDB host name	localhost
MF_INFLUXDB_PORT	Default port of InfluxDB database	8086
MF_INFLUXDB_ADMIN_USER	Default user of InfluxDB database	mainflux
MF_INFLUXDB_ADMIN_PASSWORD	Default password of InfluxDB user	mainflux
MF_INFLUXDB_NAME	InfluxDB database name	mainflux
MF_INFLUXDB_BUCKET	InfluxDB bucket name	mainflux-bucket
MF_INFLUXDB_ORG	InfluxDB organization name	mainflux
MF_INFLUXDB_TOKEN	InfluxDB API token	mainflux-token
MF_INFLUXDB_DBURL	InfluxDB database URL	""
MF_INFLUXDB_USER_AGENT	InfluxDB user agent	""
MF_INFLUXDB_TIMEOUT	InfluxDB client connection readiness timeout	1s
MF_INFLUXDB_INSECURE_SKIP_VERIFY	InfluxDB insecure skip verify	false
MF_THINGS_AUTH_GRPC_URL	Things service Auth gRPC URL	localhost:7000
MF_THINGS_AUTH_GRPC_TIMEOUT	Things service Auth gRPC request timeout in seconds	1s
MF_THINGS_AUTH_GRPC_CLIENT_TLS	Flag that indicates if TLS should be turned on	false
MF_THINGS_AUTH_GRPC_CA_CERTS	Path to trusted CAs in PEM format	""
MF_AUTH_GRPC_URL	Users service gRPC URL	localhost:7001
MF_AUTH_GRPC_TIMEOUT	Users service gRPC request timeout in seconds	1s
MF_AUTH_GRPC_CLIENT_TLS	Flag that indicates if TLS should be turned on	false
MF_AUTH_GRPC_CA_CERTS	Path to trusted CAs in PEM format	""
MF_JAEGER_URL	Jaeger server URL	http://jaeger:14268/api/traces
MF_SEND_TELEMETRY	Send telemetry to mainflux call home server	true
MF_INFLUX_READER_INSTANCE_ID	InfluxDB reader instance ID

Deployment

The service itself is distributed as Docker container. Check the influxdb-reader 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 influxdb-reader
make influxdb-reader

# copy binary to bin
make install

# Set the environment variables and run the service
MF_INFLUX_READER_LOG_LEVEL=[Service log level] \
MF_INFLUX_READER_HTTP_HOST=[Service HTTP host] \
MF_INFLUX_READER_HTTP_PORT=[Service HTTP port] \
MF_INFLUX_READER_HTTP_SERVER_CERT=[Service HTTP server certificate] \
MF_INFLUX_READER_HTTP_SERVER_KEY=[Service HTTP server key] \
MF_INFLUXDB_PROTOCOL=[InfluxDB protocol] \
MF_INFLUXDB_HOST=[InfluxDB database host] \
MF_INFLUXDB_PORT=[InfluxDB database port] \
MF_INFLUXDB_ADMIN_USER=[InfluxDB admin user] \
MF_INFLUXDB_ADMIN_PASSWORD=[InfluxDB admin password] \
MF_INFLUXDB_NAME=[InfluxDB database name] \
MF_INFLUXDB_BUCKET=[InfluxDB bucket] \
MF_INFLUXDB_ORG=[InfluxDB org] \
MF_INFLUXDB_TOKEN=[InfluxDB token] \
MF_INFLUXDB_DBURL=[InfluxDB database URL] \
MF_INFLUXDB_USER_AGENT=[InfluxDB user agent] \
MF_INFLUXDB_TIMEOUT=[InfluxDB timeout] \
MF_INFLUXDB_INSECURE_SKIP_VERIFY=[InfluxDB insecure skip verify] \
MF_THINGS_AUTH_GRPC_URL=[Things service Auth gRPC URL] \
MF_THINGS_AURH_GRPC_TIMEOUT=[Things service Auth gRPC request timeout in seconds] \
MF_THINGS_AUTH_GRPC_CLIENT_TLS=[Flag that indicates if TLS should be turned on] \
MF_THINGS_AUTH_GRPC_CA_CERTS=[Path to trusted CAs in PEM format] \
MF_AUTH_GRPC_URL=[Users service gRPC URL] \
MF_AUTH_GRPC_TIMEOUT=[Users service gRPC request timeout in seconds] \
MF_AUTH_GRPC_CLIENT_TLS=[Flag that indicates if TLS should be turned on] \
MF_AUTH_GRPC_CA_CERTS=[Path to trusted CAs in PEM format] \
MF_JAEGER_URL=[Jaeger server URL] \
MF_SEND_TELEMETRY=[Send telemetry to mainflux call home server] \
MF_INFLUX_READER_INSTANCE_ID=[InfluxDB reader instance ID] \
$GOBIN/mainflux-influxdb

Using docker-compose

This service can be deployed using docker containers. Docker compose file is available in <project_root>/docker/addons/influxdb-reader/docker-compose.yml. In order to run all Mainflux core services, as well as mentioned optional ones, execute following command:

docker-compose -f docker/docker-compose.yml up -d
docker-compose -f docker/addons/influxdb-reader/docker-compose.yml up -d

And, to use the default .env file, execute the following command:

docker-compose -f docker/addons/influxdb-reader/docker-compose.yml up --env-file docker/.env -d

Usage

Service exposes HTTP API for fetching messages.

Comparator Usage Guide:

Comparator	Usage	Example
eq	Return values that are equal to the query	eq["active"] -> "active"
ge	Return values that are substrings of the query	ge["tiv"] -> "active" and "tiv"
gt	Return values that are substrings of the query and not equal to the query	gt["tiv"] -> "active"
le	Return values that are superstrings of the query	le["active"] -> "tiv"
lt	Return values that are superstrings of the query and not equal to the query	lt["active"] -> "active" and "tiv"

Official docs can be found here.