Question

我正在尝试使用Golang Docker SDK构建docker映像，但是它失败并显示{"message": "COPY failed: no source files were specified"}," error": "COPY failed: no source files were specified"}

这是我的代码

 package main
 import (
  "archive/tar"
  "bytes"
  "context"
  "fmt"
  "io"
  "io/ioutil"
  "os"

  "github.com/docker/docker/api/types"
  "github.com/docker/docker/client"
 )

func buildImage(client *client.Client, tags []string, dockerfile string) error {
ctx := context.Background()

// Create a buffer
buf := new(bytes.Buffer)
tw := tar.NewWriter(buf)
defer tw.Close()

// Create a filereader
dockerFileReader, err := os.Open(dockerfile)
if err != nil {
    return err
}

// Read the actual Dockerfile
readDockerFile, err := ioutil.ReadAll(dockerFileReader)
if err != nil {
    return err
}

// Make a TAR header for the file
tarHeader := &tar.Header{
    Name: dockerfile,
    Size: int64(len(readDockerFile)),
}

// Writes the header described for the TAR file
err = tw.WriteHeader(tarHeader)
if err != nil {
    return err
}

// Writes the dockerfile data to the TAR file
_, err = tw.Write(readDockerFile)
if err != nil {
    return err
}

dockerFileTarReader := bytes.NewReader(buf.Bytes())

buildOptions := types.ImageBuildOptions{
    Context:    dockerFileTarReader, 
    Dockerfile: dockerfile,
    Remove:     true,
    Tags:       tags,
}
// Build the actual image
imageBuildResponse, err := client.ImageBuild(
    ctx,
    dockerFileTarReader,
    buildOptions,
)

if err != nil {
    return err
}

// Read the STDOUT from the build process
defer imageBuildResponse.Body.Close()
_, err = io.Copy(os.Stdout, imageBuildResponse.Body)
if err != nil {
    return err
}

return nil
}

这是我的文件夹结构，尝试使用src的Dockerfile构建docker映像。我想考虑docker构建中src内的所有文件。

-- root
   |-- src 
       |--Dockerfile
       |--files
   |-- go-code
       |--build.go

Dockerfile

FROM node:12


WORKDIR /app
COPY package*.json ./
RUN npm install

COPY . .

EXPOSE 3000

CMD [ "node", "index.js" ]

详细的错误消息：

{"errorDetail":{"message":"COPY failed: no source files were specified"},"error":"COPY failed: no source files were specified"}

Answer 1

这取决于您从何处调用docker构建。例如。

-- root
   |-- src 
       |--Dockerfile
       |--files
   |-- go-code
       |--build.go

如果要复制/root/src/files/中的文件，则需要cd到/root/src文件夹中。在这种情况下，docker命令将为： docker built -t <tagname> .

在您的情况下，第一个“”。 COPY命令中的，将尝试从build.go运行所在的目录中进行复制。

这可能是您的脚本失败的原因。

Docker映像构建失败，并显示“复制失败：未指定源文件”

1 个答案: