This tool implements proxyd, an RPC request router and proxy. It does the following things:
- Whitelists RPC methods.
- Routes RPC methods to groups of backend services.
- Automatically retries failed backend requests.
- Provides metrics the measure request latency, error rates, and the like.
Run make proxyd to build the binary. No additional dependencies are necessary.
To configure proxyd for use, you'll need to create a configuration file to define your proxy backends and routing rules. Check out example.config.toml for how to do this alongside a full list of all options with commentary.
Once you have a config file, start the daemon via proxyd <path-to-config>.toml.
See metrics.go for a list of all available metrics.
The metrics port is configurable via the metrics.port and metrics.host keys in the config.
The Docker image runs on Alpine Linux. If you get SSL errors when connecting to a backend within Docker, you may need to add additional certificates to Alpine's certificate store. To do this, bind mount the certificate bundle into a file in /usr/local/share/ca-certificates. The entrypoint.sh script will then update the store with whatever is in the ca-certificates directory prior to starting proxyd.