github.com/alibaba/sealer@v0.8.6-0.20220430115802-37a2bdaa8173/build/buildimage/middleware.go (about)

     1  // Copyright © 2022 Alibaba Group Holding Ltd.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package buildimage
    16  
    17  import (
    18  	"fmt"
    19  	"path/filepath"
    20  
    21  	v1 "github.com/alibaba/sealer/types/api/v1"
    22  
    23  	"github.com/alibaba/sealer/common"
    24  	"github.com/alibaba/sealer/pkg/image/save"
    25  	"github.com/alibaba/sealer/utils"
    26  )
    27  
    28  var (
    29  	imageListWithAuth = "imageListWithAuth.yaml"
    30  )
    31  
    32  type ImageSection struct {
    33  	Registry string   `json:"registry,omitempty"`
    34  	Username string   `json:"username,omitempty"`
    35  	Password string   `json:"password,omitempty"`
    36  	Images   []string `json:"images,omitempty"`
    37  }
    38  
    39  type MiddlewarePuller struct {
    40  	puller   save.DefaultImageSaver
    41  	platform v1.Platform
    42  }
    43  
    44  func (m MiddlewarePuller) Process(context, rootfs string) error {
    45  	//read the filePath named "imageListWithAuth.yaml" if not exists just return;
    46  	//pares the images and save to rootfs
    47  	filePath := filepath.Join(context, imageListWithAuth)
    48  	if !utils.IsExist(filePath) {
    49  		return nil
    50  	}
    51  
    52  	// pares middleware file: imageListWithAuth.yaml
    53  	var imageSection []ImageSection
    54  	err := utils.UnmarshalYamlFile(filePath, &imageSection)
    55  	if err != nil {
    56  		return err
    57  	}
    58  
    59  	ia := make(save.ImageListWithAuth, 0)
    60  	for _, section := range imageSection {
    61  		if len(section.Images) == 0 {
    62  			continue
    63  		}
    64  		if section.Username == "" || section.Password == "" {
    65  			return fmt.Errorf("must set username and password at imageListWithAuth.yaml")
    66  		}
    67  
    68  		domainToImages, err := normalizedImageListWithAuth(section)
    69  		if err != nil {
    70  			return err
    71  		}
    72  
    73  		ia = append(ia, save.Section{
    74  			Registry: section.Registry,
    75  			Username: section.Username,
    76  			Password: section.Password,
    77  			Images:   domainToImages,
    78  		})
    79  	}
    80  
    81  	if len(ia) == 0 {
    82  		return nil
    83  	}
    84  
    85  	return m.puller.SaveImagesWithAuth(ia, filepath.Join(rootfs, common.RegistryDirName), m.platform)
    86  }
    87  
    88  func normalizedImageListWithAuth(sec ImageSection) (map[string][]save.Named, error) {
    89  	domainToImages := make(map[string][]save.Named)
    90  	for _, image := range sec.Images {
    91  		named, err := save.ParseNormalizedNamed(image, sec.Registry)
    92  		if err != nil {
    93  			return nil, fmt.Errorf("parse image name error: %v", err)
    94  		}
    95  		domainToImages[named.Domain()+named.Repo()] = append(domainToImages[named.Domain()+named.Repo()], named)
    96  	}
    97  	return domainToImages, nil
    98  }
    99  
   100  func NewMiddlewarePuller(platform v1.Platform) Differ {
   101  	return MiddlewarePuller{
   102  		platform: platform,
   103  		puller:   save.DefaultImageSaver{},
   104  	}
   105  }