apisix/doc/grpc-proxy.md

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[中文](zh-cn/grpc-proxy.md)

# grpc-proxy

proxying gRPC traffic:
gRPC client -> APISIX -> gRPC/gRPCS server

## Parameters

* `scheme`: the `scheme` of the route's upstream must be `grpc` or `grpcs`.
* `uri`: format likes /service/method, Example：/helloworld.Greeter/SayHello

### Example

#### create proxying gRPC route

Here's an example, to proxying gRPC service by specified route:

* attention: the `scheme` of the route's upstream must be `grpc` or `grpcs`.
* attention: APISIX use TLS‑encrypted HTTP/2 to expose gRPC service, so need to [config SSL certificate](https.md)
* the grpc server example：[grpc_server_example](https://github.com/iresty/grpc_server_example)

```shell
curl http://127.0.0.1:9080/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
    "methods": ["POST", "GET"],
    "uri": "/helloworld.Greeter/SayHello",
    "upstream": {
        "scheme": "grpc",
        "type": "roundrobin",
        "nodes": {
            "127.0.0.1:50051": 1
        }
    }
}'
```

#### testing

Invoking the route created before：

```shell
$ grpcurl -insecure -import-path /pathtoprotos  -proto helloworld.proto  -d '{"name":"apisix"}' 127.0.0.1:9443 helloworld.Greeter.SayHello
{
  "message": "Hello apisix"
}
```

This means that the proxying is working.

### gRPCS

If your gRPC service encrypts with TLS by itself (so called `gPRCS`, gPRC + TLS), you need to change the `scheme` to `grpcs`. The example above runs gRPCS service on port 50052, to proxy gRPC request, we need to use the configuration below:

```shell
curl http://127.0.0.1:9080/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
    "methods": ["POST", "GET"],
    "uri": "/helloworld.Greeter/SayHello",
    "upstream": {
        "scheme": "grpcs",
        "type": "roundrobin",
        "nodes": {
            "127.0.0.1:50052": 1
        }
    }
}'
```