Mainflux.mainflux/http/README.md

HTTP adapter

HTTP adapter provides an HTTP API for sending messages through the platform.

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_HTTP_ADAPTER_LOG_LEVEL	Log level for the HTTP Adapter	error
MF_HTTP_ADAPTER_PORT	Service HTTP port	8180
MF_NATS_URL	NATS instance URL	nats://localhost:4222
MF_THINGS_URL	Things service URL	localhost:8181
MF_HTTP_ADAPTER_CLIENT_TLS	Flag that indicates if TLS should be turned on	false
MF_HTTP_ADAPTER_CA_CERTS	Path to trusted CAs in PEM format
MF_JAEGER_URL	Jaeger server URL	localhost:6831
MF_HTTP_ADAPTER_THINGS_TIMEOUT	Things gRPC request timeout in seconds	1

Deployment

The service is distributed as Docker container. The following snippet provides a compose file template that can be used to deploy the service container locally:

version: "2"
services:
  adapter:
    image: mainflux/http:[version]
    container_name: [instance name]
    ports:
      - [host machine port]:8180
    environment:
      MF_THINGS_URL: [Things service URL]
      MF_NATS_URL: [NATS instance URL]
      MF_HTTP_ADAPTER_LOG_LEVEL: [HTTP Adapter Log Level]
      MF_HTTP_ADAPTER_PORT: [Service HTTP port]
      MF_HTTP_ADAPTER_CA_CERTS: [Path to trusted CAs in PEM format]
      MF_JAEGER_URL: [Jaeger server URL]
      MF_HTTP_ADAPTER_THINGS_TIMEOUT: [Things gRPC request timeout in seconds]

To start the service outside of the container, execute the following shell script:

# download the latest version of the service
go get github.com/mainflux/mainflux

cd $GOPATH/src/github.com/mainflux/mainflux

# compile the http
make http

# copy binary to bin
make install

# set the environment variables and run the service
MF_THINGS_URL=[Things service URL] MF_NATS_URL=[NATS instance URL] MF_HTTP_ADAPTER_LOG_LEVEL=[HTTP Adapter Log Level] MF_HTTP_ADAPTER_PORT=[Service HTTP port] MF_HTTP_ADAPTER_CA_CERTS=[Path to trusted CAs in PEM format] MF_JAEGER_URL=[Jaeger server URL] MF_HTTP_ADAPTER_THINGS_TIMEOUT=[Things gRPC request timeout in seconds] $GOBIN/mainflux-http

Setting MF_HTTP_ADAPTER_CA_CERTS expects a file in PEM format of trusted CAs. This will enable TLS against the Things gRPC endpoint trusting only those CAs that are provided.

Usage

For more information about service capabilities and its usage, please check out the API documentation.