本文实现通过 github 的 workflow 来迁移到 gcr 上的镜像到 dockerhub 的过程记录。

创建仓库

创建一个 go 的项目

Certainly! The error message you’re encountering, “go: go.mod file not found in current directory or any parent directory; see ‘go help modules’”, indicates that Go is unable to locate a go.mod file in the current directory or any of its parent directories. This file is essential for managing Go modules and dependencies.

Here are a few steps you can take to resolve this issue:

Initialize a Go Module:
- In your project directory, run the following command:
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  go mod init yourProjectName
  Replace yourProjectName with an appropriate name for your project. This command will create a go.mod file in the current directory, allowing Go to manage your project’s dependencies¹².
Check Environment Variables:
- Ensure that the environment variable GO111MODULE is set correctly. You can set it to one of the following values:
  - auto: Automatically enable Go modules when a go.mod file is present.
  - on: Force Go modules to be enabled.
  - off: Disable Go modules entirely. To set the variable, run:
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go env -w GO111MODULE=auto
This will allow Go to automatically enable modules based on the presence of a go.mod file²⁴.
Run go mod tidy:
- Execute the following command in your project directory:
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  go mod tidy
  This command will synchronize your code’s imports with the dependencies listed in the go.mod file⁴.

Remember that these steps are general guidelines, and you should adapt them to your specific project structure. If you encounter any further issues, feel free to ask for additional assistance! 🚀

源: 与必应的对话， 2024/3/29 (1) go 语言开发时，报“go:go.mod 文件未在当前目录或任何父目录中找到”这个问题怎么解决？ - 知乎. https://www.zhihu.com/question/458797990. (2) 如何在 Visual Studio Code 中配置 GO 开发环境 - 知乎 - 知乎专栏. https://zhuanlan.zhihu.com/p/408291483. (3) 请问 vscode 进行 go 调试遇到找不到 mod 文件是什么意思？ - 知乎. https://www.zhihu.com/question/514939166. (4) 【Go】エラー「go.mod file not found in current directory or any parent …. https://qiita.com/to3izo/items/f47bbc7b11ef6d2e24cd. (5) Error message “go: go.mod file not found in current directory or any …. https://stackoverflow.com/questions/66894200/error-message-go-go-mod-file-not-found-in-current-directory-or-any-parent-dire.

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#main.go
package main

import (
	"context"
	"encoding/base64"
	"encoding/json"
	"fmt"
	"io"
	"os"
	"strings"
	"sync"
	"text/template"

	"github.com/docker/docker/api/types"
	"github.com/docker/docker/api/types/registry"
	"github.com/docker/docker/client"
	"github.com/spf13/pflag"
)

var (
	content    = pflag.StringP("content", "", "", "原始镜像，格式为： {\" hub-mirror\":[\"hub-mirror.cn-hangzhou.aliyuncs.com\")")
	maxContent = pflag.IntP("maxContent", "", 10, "原始镜像个数限制")
	username   = pflag.StringP("username", "", "", "阿里云账号")
	password   = pflag.StringP("password", "", "", "阿里云密码")
	outputPath = pflag.StringP("outputPath", "", "output.sh", "结果输出文件路径")
)

func main() {
	pflag.Parse()
	fmt.Println("验证原始镜像内容")
	var hubMirrors struct {
		Content []string `json:"hub-mirror"`
	}
	err := json.Unmarshal([]byte(*content), &hubMirrors)
	if err != nil {
		panic(err)
	}
	if len(hubMirrors.Content) > *maxContent {
		panic("原始镜像个数超过限制")
	}
	fmt.Println("%+v\n", hubMirrors)
	fmt.Println("连接docker")
	cli, err := client.NewClientWithOpts(client.FromEnv, client.WithAPIVersionNegotiation())
	if err != nil {
		panic(err)
	}
	fmt.Println("验证 Docker 用户名和密码")

	if *username == "" || *password == "" {
		panic("用户名和密码不能为空")
	}

	autoConfig := registry.AuthConfig{
		Username: *username,
		Password: *password,
	}

	encodedJSON, err := json.Marshal(autoConfig)
	if err != nil {
		panic(err)
	}
	authStr := base64.URLEncoding.EncodeToString(encodedJSON)
	_, err = cli.RegistryLogin(context.Background(), autoConfig)
	if err != nil {
		panic(err)
	}
	fmt.Println("开始转换镜像")

	output := make([]struct {
		Source string
		Target string
	}, 0)
	wg := sync.WaitGroup{}
	for _, source := range hubMirrors.Content {
		if source == "" {
			continue
		}
		target := *username + "/" + strings.ReplaceAll(source, "/", ".")
		wg.Add(1)
		go func(source, target string) {
			defer wg.Done()
			fmt.Printf("开始转换镜像 %s -> %s\n", source, "=>", target)
			ctx := context.Background()

			// pull image
			pullOut, err := cli.ImagePull(ctx, source, types.ImagePullOptions{})
			if err != nil {
				panic(err)
			}
			defer pullOut.Close()
			io.Copy(os.Stdout, pullOut)
			//重新打标签
			err = cli.ImageTag(ctx, source, target)
			if err != nil {
				panic(err)
			}
			// push image
			pushOut, err := cli.ImagePush(ctx, target, types.ImagePushOptions{RegistryAuth: authStr})
			if err != nil {
				panic(err)
			}
			defer pushOut.Close()
			io.Copy(os.Stdout, pushOut)
			output = append(output, struct {
				Source string
				Target string
			}{Source: source, Target: target})
			fmt.Printf("转换镜像 %s -> %s 完成\n", source, target)
		}(source, target)
	}
	wg.Wait()
	if len(output) == 0 {
		panic("没有镜像需要转换")
	}

	tmpl, err := template.New("pull_images").Parse(`{{- range . -}}
    docker pull {{.Target}}
    docker tag {{.Target}} {{.Source}}
    {{- end -}}`)
	if err != nil {
		panic(err)
	}
	outputFile, err := os.Create(*outputPath)
	if err != nil {
		panic(err)
	}
	defer outputFile.Close()
	err = tmpl.Execute(outputFile, output)
	if err != nil {
		panic(err)
	}
	fmt.Println(output)
}

接下来测试一下迁移镜像

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 go run main.go --username=huangxiaofenglogin --password=Hxf-10047 --content='{"hub-mirror":["gcr.io/google-samples/microservices-demo/emailservice:v0.3.5"
]}'
验证原始镜像内容
%+v
 {[gcr.io/google-samples/microservices-demo/emailservice:v0.3.5]}
连接docker
验证 Docker 用户名和密码
开始转换镜像
开始转换镜像 gcr.io/google-samples/microservices-demo/emailservice:v0.3.5 -> =>
%!(EXTRA string=huangxiaofenglogin/gcr.io.google-samples.microservices-demo.emailservice:v0.3.5){"status":"Pulling from google-samples/microservices-demo/emailservice","id":"v0.3.5"}
{"status":"Pulling fs layer","progressDetail":{},"id":"a2abf6c4d29d"}
{"status":"Pulling fs layer","progressDetail":{},"id":"625294dad115"}
{"status":"Pulling fs layer","progressDetail":{},"id":"2d55109ef858"}
{"status":"Pulling fs layer","progressDetail":{},"id":"8f7394e7143f"}
{"status":"Pulling fs layer","progressDetail":{},"id":"8571408494af"}
{"status":"Pulling fs layer","progressDetail":{},"id":"f95c0b27aef9"}
{"status":"Pulling fs layer","progressDetail":{},"id":"2393ef3b74ff"}
{"status":"Waiting","progressDetail":{},"id":"8571408494af"}
{"status":"Pulling fs layer","progressDetail":{},"id":"4eecd96b4cb1"}
{"status":"Pulling fs layer","progressDetail":{},"id":"2d143e67efa5"}
{"status":"Waiting","progressDetail":{},"id":"f95c0b27aef9"}
{"status":"Waiting","progressDetail":{},"id":"2393ef3b74ff"}
{"status":"Pulling fs layer","progressDetail":{},"id":"86bac8e09f85"}

接下来把仓库推送到 github 上操作