在 Docker Golang SDK imagePull 方法中传递本地 docker 镜像

Question

我想从我的本地系统中提取一个 docker 映像。

图片名称是：示例

import (

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

cli, err := client.NewClientWithOpts(client.FromEnv, client.WithAPIVersionNegotiation())
if err != nil {
    panic(err)
}

imageName := "example:latest"

out, err := cli.ImagePull(ctx, imageName, types.ImagePullOptions{})
if err != nil {
    panic(err)
}

当前代码给了我这样的东西：

panic: Error response from daemon: pull access denied for example, repository does not exist or may require 'docker login': denied: requested access to the resource is denied

是否可以将本地docker镜像传递给该方法，如果可以，如何？

Answer 1

首先，您可以使用标记“localhost/example:latest”在本地构建映像

 
  $ docker build -t "localhost/example:latest" .

然后，你可以在图像名称前加上localhost，这样它会尝试本地注册表来拉图像，所以，你可以试试这个：

package main

import (
    "fmt"

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


func main(){
  cli, err := client.NewClientWithOpts(client.FromEnv,   client.WithAPIVersionNegotiation())
  if err != nil {
      panic(err)
  }

  imageName := "localhost/example:latest" // <- localhost prepended!

  out, err := cli.ImagePull(ctx, imageName, types.ImagePullOptions{})
  if err != nil {
    panic(err)
  }

  fmt.Println(out)
}