go的grpc环境安装

参考grpc-go官方文档：https://grpc.io/docs/languages/go/quickstart/
视频教程：https://www.bilibili.com/video/BV1zi4y1L7Sf

环境

golang的docker image

$ docker run -it golang:alpine

简单准备

# go env -w GO111MODULE=on
//重要：添加代理,参考:https://goproxy.cn/
# go env -w GOPROXY=https://goproxy.cn,direct
//必要的一些工具
# apk add git make gcc g++

prorobuf安装

下载protobuf-all-3.8.0.tar.gz

# tar -xvf protobuf-all-3.8.0.tar.gz 
# cd protobuf-3.8.0
protobuf-3.8.0# mkdir -p /usr/local/protobuf
protobuf-3.8.0# ./configure --prefix=/usr/local/protobuf
protobuf-3.8.0# make
protobuf-3.8.0# make install

protobuf-3.8.0# echo "export PATH=$PATH:/usr/local/protobuf/bin">>/etc/profile
protobuf-3.8.0# source /etc/profile
protobuf-3.8.0# protoc --version
libprotoc 3.8.0

prorobuf安装完成。

protoc-gen-go安装

protoc-gen-go是proto文件生成go文件的插件

方法1：

//网络原因，安装比较困难，添加GOPROXY后解决。
go get -u github.com/golang/protobuf/protoc-gen-go

方法2：源码安装

mkdir -p $GOPATH/src/github.com/golang && cd $GOPATH/src/github.com/golang
//大小8M,可以直接clone
golang# git clone https://github.com/golang/protobuf.git
Cloning into 'protobuf'...
remote: Enumerating objects: 7251, done.
remote: Total 7251 (delta 0), reused 0 (delta 0), pack-reused 7251
Receiving objects: 100% (7251/7251), 8.43 MiB | 17.00 KiB/s, done.
Resolving deltas: 100% (4783/4783), done.

编译方法

golang# cd protobuf/protoc-gen-go
protoc-gen-go# go build -o protoc-gen-go main.go
go: downloading google.golang.org/protobuf v1.23.0
protoc-gen-go# ls
protoc-gen-go        <<< 编译出可执行文件

protoc-gen-go# echo "export PATH=$PATH:$GOPATH/bin" >> /etc/profile
protoc-gen-go# source /etc/profile
//复制protoc-gen-go到bin目录
protoc-gen-go# cp protoc-gen-go /usr/local/go/bin
protoc-gen-go# ls /usr/local/go/bin/
go             gofmt          protoc-gen-go

验证protoc-gen-go插件

验证protoc-gen-go插件就是看是否能将proto文件生成pb.go文件。

helloworld# ls
helloworld.proto       
helloworld# protoc --go_out=plugins=grpc:. helloworld.proto
helloworld# ls google.golang.org/grpc/examples/helloworld/helloworld/
helloworld.pb.go

证明protoc-gen-go插件成功！

安装grpc-go

# mkdir -p $GOPATH/src/google.golang.org
# cd $GOPATH/src/google.golang.org
//下载源码包
google.golang.org# wget https://github.com/grpc/grpc-go/archive/master.tar.gz
Connecting to github.com (13.229.188.59:443)
Connecting to codeload.github.com (54.251.140.56:443)
saving to 'master.tar.gz'
master.tar.gz        100% |****************************************************************************************| 1138k  0:00:00 ETA
'master.tar.gz' saved
//解压源码包
google.golang.org# tar -xvf master.tar.gz 
google.golang.org# mv grpc-go-master grpc
//安装grpc-go
google.golang.org# cd grpc
grpc# go install google.golang.org/grpc
go: downloading github.com/golang/protobuf v1.4.2
go: downloading google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013
go: downloading golang.org/x/net v0.0.0-20190311183353-d8887717615a
go: downloading golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a
go: downloading golang.org/x/text v0.3.0

grpc-go安装完成。

验证

找到安装grpc-go时已经下载好的示例代码。

服务端启动

$ docker ps | grep golang
a450ff530be6        golang              "/bin/sh -c sh"     About an hour ago   Up About an hour                        elastic_ptolemy
$ docker exec -it a450ff530be6 sh

# cd /go/src/google.golang.org/grpc/examples/helloworld
helloworld # ls
greeter_client  greeter_server  helloworld

helloworld# go run greeter_server/main.go
2021/01/17 00:53:56 Received: world

客户端启动

$ docker ps | grep golang
a450ff530be6        golang              "/bin/sh -c sh"     About an hour ago   Up About an hour                        elastic_ptolemy
$ docker exec -it a450ff530be6 sh

# cd /go/src/google.golang.org/grpc/examples/helloworld
helloworld # ls
greeter_client  greeter_server  helloworld

helloworld # go run greeter_client/main.go
2021/01/17 00:53:56 Greeting: Hello world

grpc通信成功！