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67 lines
2.7 KiB
Markdown
67 lines
2.7 KiB
Markdown
# gRPC-Go
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[](https://travis-ci.org/grpc/grpc-go) [](https://godoc.org/google.golang.org/grpc) [](https://goreportcard.com/report/github.com/grpc/grpc-go)
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The Go implementation of [gRPC](https://grpc.io/): A high performance, open source, general RPC framework that puts mobile and HTTP/2 first. For more information see the [gRPC Quick Start: Go](https://grpc.io/docs/quickstart/go.html) guide.
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Installation
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------------
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To install this package, you need to install Go and setup your Go workspace on your computer. The simplest way to install the library is to run:
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```
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$ go get -u google.golang.org/grpc
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```
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Prerequisites
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-------------
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gRPC-Go requires Go 1.9 or later.
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Constraints
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-----------
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The grpc package should only depend on standard Go packages and a small number of exceptions. If your contribution introduces new dependencies which are NOT in the [list](https://godoc.org/google.golang.org/grpc?imports), you need a discussion with gRPC-Go authors and consultants.
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Documentation
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-------------
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See [API documentation](https://godoc.org/google.golang.org/grpc) for package and API descriptions and find examples in the [examples directory](examples/).
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Performance
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-----------
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See the current benchmarks for some of the languages supported in [this dashboard](https://performance-dot-grpc-testing.appspot.com/explore?dashboard=5652536396611584&widget=490377658&container=1286539696).
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Status
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------
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General Availability [Google Cloud Platform Launch Stages](https://cloud.google.com/terms/launch-stages).
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FAQ
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---
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#### Compiling error, undefined: grpc.SupportPackageIsVersion
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Please update proto package, gRPC package and rebuild the proto files:
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- `go get -u github.com/golang/protobuf/{proto,protoc-gen-go}`
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- `go get -u google.golang.org/grpc`
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- `protoc --go_out=plugins=grpc:. *.proto`
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#### How to turn on logging
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The default logger is controlled by the environment variables. Turn everything
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on by setting:
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```
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GRPC_GO_LOG_VERBOSITY_LEVEL=99 GRPC_GO_LOG_SEVERITY_LEVEL=info
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```
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#### The RPC failed with error `"code = Unavailable desc = transport is closing"`
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This error means the connection the RPC is using was closed, and there are many
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possible reasons, including:
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1. mis-configured transport credentials, connection failed on handshaking
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1. bytes disrupted, possibly by a proxy in between
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1. server shutdown
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It can be tricky to debug this because the error happens on the client side but
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the root cause of the connection being closed is on the server side. Turn on
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logging on __both client and server__, and see if there are any transport
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errors.
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