68 lines
3.0 KiB
Markdown
68 lines
3.0 KiB
Markdown
# WebSocket adapter
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WebSocket adapter provides an WebSocket 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_CLIENT_TLS | Flag that indicates if TLS should be turned on | false |
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| MF_WS_ADAPTER_CA_CERTS | Path to trusted CAs in PEM format | |
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| MF_WS_ADAPTER_LOG_LEVEL | Log level for the WS Adapter | error |
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| MF_WS_ADAPTER_PORT | Service WS port | 8180 |
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| MF_NATS_URL | NATS instance URL | nats://localhost:4222 |
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| MF_THINGS_URL | Things service URL | localhost:8181 |
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| MF_JAEGER_URL | Jaeger server URL | localhost:6831 |
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| MF_WS_ADAPTER_THINGS_TIMEOUT | Things gRPC request timeout in seconds | 1 |
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## Deployment
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The service is distributed as Docker container. The following snippet provides
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a compose file template that can be used to deploy the service container locally:
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```yaml
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version: "2"
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services:
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ws:
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image: mainflux/ws:[version]
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container_name: [instance name]
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ports:
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- [host machine port]:[configured port]
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environment:
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MF_THINGS_URL: [Things service URL]
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MF_NATS_URL: [NATS instance URL]
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MF_WS_ADAPTER_PORT: [Service WS port]
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MF_WS_ADAPTER_LOG_LEVEL: [WS adapter log level]
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MF_WS_ADAPTER_CLIENT_TLS: [Flag that indicates if TLS should be turned on]
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MF_WS_ADAPTER_CA_CERTS: [Path to trusted CAs in PEM format]
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MF_JAEGER_URL: [Jaeger server URL]
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MF_WS_ADAPTER_THINGS_TIMEOUT: [Things gRPC request timeout in seconds]
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```
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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_THINGS_URL=[Things service URL] MF_NATS_URL=[NATS instance URL] MF_WS_ADAPTER_PORT=[Service WS port] MF_WS_ADAPTER_LOG_LEVEL=[WS adapter log level] MF_WS_ADAPTER_CLIENT_TLS=[Flag that indicates if TLS should be turned on] MF_WS_ADAPTER_CA_CERTS=[Path to trusted CAs in PEM format] MF_JAEGER_URL=[Jaeger server URL] MF_WS_ADAPTER_THINGS_TIMEOUT=[Things gRPC request timeout in seconds] $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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