【docker API】docker client go 之image接口

1 docker client 创建

func NewClient(server, port, version string) (*client.Client, error) {
   host := "tcp://" + server + ":" + port
   return client.NewClient(host, version, nil, map[string]string{"Content-type": "application/x-tar"})
}

2 docker build image

根据ImageBuild接口，生成的镜像名为ImageBuildOptions，比较鸡贼，一直在找哪个是repo名字，内心崩溃

设置Labels好处是ListImage可以根据这个过滤参照https://docs.docker.com/engine/api/v1.37/#operation/ImageList

func BuildImage(cli *client.Client, tarFile, project, imageName string) error {
   dockerBuildContext, err := os.Open(tarFile)
   if err != nil {
      return err
   }
   defer dockerBuildContext.Close()

   buildOptions := types.ImageBuildOptions{
      Dockerfile: "Dockerfile", // optional, is the default
      Tags:       []string{imageName},
      Labels: map[string]string{
         project: "project",
      },
   }

   output, err := cli.ImageBuild(context.Background(), dockerBuildContext, buildOptions)
   if err != nil {
      return err
   }

   body, err := ioutil.ReadAll(output.Body)
   if err != nil {
      return err
   }
   dlog.Infof("Build resource image output: %v", string(body))

   if strings.Contains(string(body), "error") {
      return fmt.Errorf("build image to docker error")
   }

   return nil
}

3 docker push image

对于docker 需要认证，直接调用ImagePush没什么好说的了

func PushImage(cli *client.Client, registryUser, registryPassword, image string) error {
   authConfig := types.AuthConfig{
      Username: registryUser,
      Password: registryPassword,
   }
   encodedJSON, err := json.Marshal(authConfig)
   if err != nil {
      return err
   }
   dlog.Infof("Push docker image registry: %v %v", registryUser, registryPassword)

   authStr := base64.URLEncoding.EncodeToString(encodedJSON)
   out, err := cli.ImagePush(context.TODO(), image, types.ImagePushOptions{RegistryAuth: authStr})
   if err != nil {
      return err
   }

   body, err := ioutil.ReadAll(out)
   if err != nil {
      return err
   }
   dlog.Infof("Push docker image output: %v", string(body))

   if strings.Contains(string(body), "error") {
      return fmt.Errorf("push image to docker error")
   }

   return nil
}

其他接口雷同，一看既会

参考

https://docs.docker.com/engine/api/v1.37/#operation/ImageCreate