b72230379f
With kubernetes 1.18 release of client-go, signatures on methods in generated clientsets, dynamic, metadata, and scale clients have been modified to accept context.Context as a first argument. Signatures of Create, Update, and Patch methods have been updated to accept CreateOptions, UpdateOptions and PatchOptions respectively. Signatures of Delete and DeleteCollection methods now accept DeleteOptions by value instead of by reference. These changes are now accommodated with this PR and client-go and dependencies are updated to v1.18.0 Signed-off-by: Humble Chirammal <hchiramm@redhat.com>
138 lines
4.4 KiB
Markdown
138 lines
4.4 KiB
Markdown
# gRPC-Go
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[](https://travis-ci.org/grpc/grpc-go)
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[](https://godoc.org/google.golang.org/grpc)
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[](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
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source, general RPC framework that puts mobile and HTTP/2 first. For more
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information see the [gRPC Quick Start:
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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
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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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With Go module support (Go 1.11+), simply `import "google.golang.org/grpc"` in
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your source code and `go [build|run|test]` will automatically download the
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necessary dependencies ([Go modules
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ref](https://github.com/golang/go/wiki/Modules)).
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If you are trying to access grpc-go from within China, please see the
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[FAQ](#FAQ) below.
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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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Documentation
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-------------
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- See [godoc](https://godoc.org/google.golang.org/grpc) for package and API
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descriptions.
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- Documentation on specific topics can be found in the [Documentation
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directory](Documentation/).
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- Examples can be found in the [examples directory](examples/).
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Performance
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-----------
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Performance benchmark data for grpc-go and other languages is maintained in
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[this
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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
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Stages](https://cloud.google.com/terms/launch-stages).
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FAQ
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---
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#### I/O Timeout Errors
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The `golang.org` domain may be blocked from some countries. `go get` usually
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produces an error like the following when this happens:
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```
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$ go get -u google.golang.org/grpc
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package google.golang.org/grpc: unrecognized import path "google.golang.org/grpc" (https fetch: Get https://google.golang.org/grpc?go-get=1: dial tcp 216.239.37.1:443: i/o timeout)
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```
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To build Go code, there are several options:
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- Set up a VPN and access google.golang.org through that.
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- Without Go module support: `git clone` the repo manually:
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```
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git clone https://github.com/grpc/grpc-go.git $GOPATH/src/google.golang.org/grpc
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```
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You will need to do the same for all of grpc's dependencies in `golang.org`,
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e.g. `golang.org/x/net`.
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- With Go module support: it is possible to use the `replace` feature of `go
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mod` to create aliases for golang.org packages. In your project's directory:
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```
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go mod edit -replace=google.golang.org/grpc=github.com/grpc/grpc-go@latest
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go mod tidy
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go mod vendor
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go build -mod=vendor
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```
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Again, this will need to be done for all transitive dependencies hosted on
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golang.org as well. Please refer to [this
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issue](https://github.com/golang/go/issues/28652) in the golang repo regarding
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this concern.
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#### Compiling error, undefined: grpc.SupportPackageIsVersion
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##### If you are using Go modules:
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Please ensure your gRPC-Go version is `require`d at the appropriate version in
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the same module containing the generated `.pb.go` files. For example,
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`SupportPackageIsVersion6` needs `v1.27.0`, so in your `go.mod` file:
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```
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module <your module name>
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require (
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google.golang.org/grpc v1.27.0
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)
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```
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##### If you are *not* using Go modules:
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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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