67 lines
3.8 KiB
Markdown
67 lines
3.8 KiB
Markdown
# WebSocket adapter
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WebSocket adapter provides an [WebSocket](https://en.wikipedia.org/wiki/WebSocket#:~:text=WebSocket%20is%20a%20computer%20communications,protocol%20is%20known%20as%20WebSockets.) API for sending and receiving messages through the platform.
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## Configuration
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The service is configured using the environment variables presented in the
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following table. Note that any unset variables will be replaced with their
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default values.
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| Variable | Description | Default |
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| ------------------------------ | --------------------------------------------------- | ------------------------------ |
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| MF_WS_ADAPTER_LOG_LEVEL | Log level for the WS Adapter | info |
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| MF_WS_ADAPTER_HTTP_HOST | Service WS host | |
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| MF_WS_ADAPTER_HTTP_PORT | Service WS port | 8190 |
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| MF_WS_ADAPTER_HTTP_SERVER_CERT | Service WS server certificate | |
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| MF_WS_ADAPTER_HTTP_SERVER_KEY | Service WS server key | |
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| MF_THINGS_AUTH_GRPC_URL | Things service Auth gRPC URL | localhost:7000 |
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| MF_THINGS_AUTH_GRPC_TIMEOUT | Things service Auth gRPC request timeout in seconds | 1s |
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| MF_THINGS_AUTH_GRPC_CLIENT_TLS | Flag that indicates if TLS should be turned on | false |
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| MF_THINGS_AUTH_GRPC_CA_CERTS | Path to trusted CAs in PEM format | |
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| MF_MESSAGE_BROKER_URL | Message broker instance URL | nats://localhost:4222 |
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| MF_JAEGER_URL | Jaeger server URL | http://jaeger:14268/api/traces |
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| MF_SEND_TELEMETRY | Send telemetry to mainflux call home server | true |
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| MF_WS_ADAPTER_INSTANCE_ID | Service instance ID | "" |
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## Deployment
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The service is distributed as Docker container. Check the [`ws-adapter`](https://github.com/mainflux/mainflux/blob/master/docker/docker-compose.yml#L350-L368) service section in docker-compose to see how the service is deployed.
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Running this service outside of container requires working instance of the message broker service.
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To start the service outside of the container, execute the following shell script:
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```bash
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# download the latest version of the service
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git clone https://github.com/mainflux/mainflux
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cd mainflux
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# compile the ws
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make ws
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# copy binary to bin
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make install
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# set the environment variables and run the service
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MF_WS_ADAPTER_LOG_LEVEL=[WS adapter log level] \
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MF_WS_ADAPTER_HTTP_HOST=[Service WS host] \
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MF_WS_ADAPTER_HTTP_PORT=[Service WS port] \
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MF_WS_ADAPTER_HTTP_SERVER_CERT=[Service WS server certificate] \
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MF_WS_ADAPTER_HTTP_SERVER_KEY=[Service WS server key] \
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MF_THINGS_AUTH_GRPC_URL=[Things service Auth gRPC URL] \
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MF_THINGS_AUTH_GRPC_TIMEOUT=[Things service Auth gRPC request timeout in seconds] \
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MF_THINGS_AUTH_GRPC_CLIENT_TLS=[Flag that indicates if TLS should be turned on] \
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MF_THINGS_AUTH_GRPC_CA_CERTS=[Path to trusted CAs in PEM format] \
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MF_MESSAGE_BROKER_URL=[Message broker instance URL] \
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MF_JAEGER_URL=[Jaeger server URL] \
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MF_SEND_TELEMETRY=[Send telemetry to mainflux call home server] \
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MF_WS_ADAPTER_INSTANCE_ID=[Service instance ID] \
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$GOBIN/mainflux-ws
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```
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## Usage
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For more information about service capabilities and its usage, please check out
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the [WebSocket paragraph](https://mainflux.readthedocs.io/en/latest/messaging/#websocket) in the Getting Started guide.
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