使用 gRPC Docker 容器构建 Go 时出错

Question

我正在尝试将我的 golang grpc 应用程序变成一个 docker 容器，但是在尝试构建时我不断收到错误。

错误是

 messagepb/stickynote.pb.go:16:8: cannot find package "github.com/golang/protobuf/proto" in any of:
        /usr/local/go/src/github.com/golang/protobuf/proto (from $GOROOT)
        /go/src/github.com/golang/protobuf/proto (from $GOPATH)
sticky.go:6:2: cannot find package "github.com/llgcode/draw2d" in any of:
        /usr/local/go/src/github.com/llgcode/draw2d (from $GOROOT)
        /go/src/github.com/llgcode/draw2d (from $GOPATH)
sticky.go:7:2: cannot find package "github.com/llgcode/draw2d/draw2dimg" in any of:
        /usr/local/go/src/github.com/llgcode/draw2d/draw2dimg (from $GOROOT)
        /go/src/github.com/llgcode/draw2d/draw2dimg (from $GOPATH)
messagepb/stickynote.pb.go:21:2: cannot find package "golang.org/x/net/context" in any of:
        /usr/local/go/src/golang.org/x/net/context (from $GOROOT)
        /go/src/golang.org/x/net/context (from $GOPATH)
messagepb/stickynote.pb.go:22:2: cannot find package "google.golang.org/grpc" in any of:
        /usr/local/go/src/google.golang.org/grpc (from $GOROOT)
        /go/src/google.golang.org/grpc (from $GOPATH)
main.go:7:2: cannot find package "google.golang.org/grpc/credentials" in any of:
        /usr/local/go/src/google.golang.org/grpc/credentials (from $GOROOT)
        /go/src/google.golang.org/grpc/credentials (from $GOPATH)

Dockerfile 是

FROM golang:latest

RUN mkdir -p /go/src/github.com/alhennessey92/mygoapp
ADD . /go/src/github.com/alhennessey92/mygoapp

WORKDIR /go/src/github.com/alhennessey92/mygoapp
EXPOSE 8080

RUN go install github.com/alhennessey92/mygoapp
ENTRYPOINT ["/go/bin/mygoapp"]

文件结构如下

go
-- src
---- github.com
------ alhennessey92
-------- mygoapp
---------- Dockerfile
---------- main.go
---------- sticky.go
---------- messagepb
------------ stickynote.pb.go
------------ stickynote.proto

这是 main.go 的代码

package main

import (
    "io"
    "net"
    "log"
    "google.golang.org/grpc/credentials"
    "golang.org/x/net/context"
    pb "github.com/alhennessey92/mygoapp/messagepb"
    "google.golang.org/grpc"
)


const (
    useSSL = false
)

type StickyNoteServer struct{}

var stickyNoteServer StickyNoteServer



func (s *StickyNoteServer) Get(ctx context.Context, r *pb.StickyNoteRequest) (*pb.StickyNoteResponse, error) {
    var sticky Sticky
    sticky.Message = r.Message
    sticky.Centered = false

    resp := &pb.StickyNoteResponse{}
    stickyBytes, err := sticky.DrawPNG(512, 512)
    resp.Image = *stickyBytes

    return resp, err
}
func (s *StickyNoteServer) Update(stream pb.StickyNote_UpdateServer) error {
    for {
        in, err := stream.Recv()
        if err == io.EOF {
            return nil
        }
        if err != nil {
            return err
        }

        var sticky Sticky
        sticky.Message = in.Message
        sticky.Centered = false

        resp := &pb.StickyNoteResponse{}
        stickyBytes, err := sticky.DrawPNG(512, 512)
        resp.Image = *stickyBytes

        if err := stream.Send(resp); err != nil {
            return err
        }
    }
    return nil
}

 //[START main]
func main() {


    var err error
    var lis net.Listener
    var grpcServer *grpc.Server
    if !useSSL {
        lis, err = net.Listen("tcp", ":8080")
        if err != nil {
            log.Fatalf("failed to listen: %v", err)
        }
        grpcServer = grpc.NewServer()
    } else {
        certFile := "ssl.crt"
        keyFile := "ssl.key"
        creds, err := credentials.NewServerTLSFromFile(certFile, keyFile)
        lis, err = net.Listen("tcp", ":443")
        if err != nil {
            log.Fatalf("failed to listen: %v", err)
        }
        grpcServer = grpc.NewServer(grpc.Creds(creds))
    }
    pb.RegisterStickyNoteServer(grpcServer, &stickyNoteServer)
    grpcServer.Serve(lis)
}

这是我在终端中运行以构建 docker 容器的代码

docker build -t alhennessey92/mygoapptest .

我使用的 go 代码来自 google cloud grpc demo stickynote - https://cloud.google.com/solutions/mobile/mobile-compute-engine-grpc

我认为错误与使用命令go get有关，但我不确定

感谢您的帮助

Answer 1

您需要将go get 添加到您的docker 文件中，或者您需要使用dep 之类的工具添加vendor 第三方库。

供应商更好，但如果您只想在 docker 容器中下载文件，请执行以下操作：

FROM golang:latest

RUN mkdir -p /go/src/github.com/alhennessey92/mygoapp
ADD . /go/src/github.com/alhennessey92/mygoapp

WORKDIR /go/src/github.com/alhennessey92/mygoapp
EXPOSE 8080

RUN go get ./...
RUN go install 
ENTRYPOINT ["/go/bin/mygoapp"]

Answer 2

我遇到了和你类似的问题

原来我没有正确创建文件夹 我在 docker 文件中缺少这些行

 ADD . /go/src/github.com/grpc/app_folder_name
 WORKDIR /go/src/github.com/grpc/app_folder_name`

这是我的 dockerfile

FROM golang
# Copy our file in the host contianer to our contianer
ADD . /go/src/github.com/grpc/app_folder_name
WORKDIR /go/src/github.com/grpc/app_folder_name
RUN go get -u github.com/golang/protobuf/protoc-gen-go
RUN go get -u google.golang.org/grpc
RUN go get -u go.mongodb.org/mongo-driver/mongo
RUN go get -u github.com/go-redis/redis
RUN go install -v ./...
# Generate binary file from our /app
RUN go build /go/src/github.com/grpc/app_folder_name/app_server/app.go
# Expose the ports used in server
EXPOSE 50051:50051
EXPOSE 27018:27018
# Run the app binarry file 
CMD ["./app"]

`