123 lines
3.9 KiB
Go
123 lines
3.9 KiB
Go
/*
|
|
Copyright 2018 Google LLC
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package image
|
|
|
|
import (
|
|
"fmt"
|
|
"path/filepath"
|
|
"strconv"
|
|
|
|
"github.com/GoogleContainerTools/kaniko/pkg/cache"
|
|
"github.com/GoogleContainerTools/kaniko/pkg/config"
|
|
"github.com/GoogleContainerTools/kaniko/pkg/constants"
|
|
"github.com/GoogleContainerTools/kaniko/pkg/image/remote"
|
|
"github.com/GoogleContainerTools/kaniko/pkg/timing"
|
|
"github.com/GoogleContainerTools/kaniko/pkg/util"
|
|
|
|
"github.com/google/go-containerregistry/pkg/name"
|
|
v1 "github.com/google/go-containerregistry/pkg/v1"
|
|
"github.com/google/go-containerregistry/pkg/v1/empty"
|
|
"github.com/google/go-containerregistry/pkg/v1/tarball"
|
|
|
|
"github.com/sirupsen/logrus"
|
|
)
|
|
|
|
var (
|
|
// RetrieveRemoteImage downloads an image from a remote location
|
|
RetrieveRemoteImage = remote.RetrieveRemoteImage
|
|
retrieveTarImage = tarballImage
|
|
)
|
|
|
|
// RetrieveSourceImage returns the base image of the stage at index
|
|
func RetrieveSourceImage(stage config.KanikoStage, opts *config.KanikoOptions) (v1.Image, error) {
|
|
t := timing.Start("Retrieving Source Image")
|
|
defer timing.DefaultRun.Stop(t)
|
|
var buildArgs []string
|
|
|
|
for _, marg := range stage.MetaArgs {
|
|
for _, arg := range marg.Args {
|
|
buildArgs = append(buildArgs, fmt.Sprintf("%s=%s", arg.Key, arg.ValueString()))
|
|
}
|
|
}
|
|
buildArgs = append(buildArgs, opts.BuildArgs...)
|
|
currentBaseName, err := util.ResolveEnvironmentReplacement(stage.BaseName, buildArgs, false)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
// First, check if the base image is a scratch image
|
|
if currentBaseName == constants.NoBaseImage {
|
|
logrus.Info("No base image, nothing to extract")
|
|
return empty.Image, nil
|
|
}
|
|
// Next, check if the base image of the current stage is built from a previous stage
|
|
// If so, retrieve the image from the stored tarball
|
|
if stage.BaseImageStoredLocally {
|
|
return retrieveTarImage(stage.BaseImageIndex)
|
|
}
|
|
|
|
// Finally, check if local caching is enabled
|
|
// If so, look in the local cache before trying the remote registry
|
|
if opts.Cache && opts.CacheDir != "" {
|
|
cachedImage, err := cachedImage(opts, currentBaseName)
|
|
if err != nil {
|
|
switch {
|
|
case cache.IsNotFound(err):
|
|
logrus.Debugf("Image %v not found in cache", currentBaseName)
|
|
case cache.IsExpired(err):
|
|
logrus.Debugf("Image %v found in cache but was expired", currentBaseName)
|
|
default:
|
|
logrus.Errorf("Error while retrieving image from cache: %v %v", currentBaseName, err)
|
|
}
|
|
} else if cachedImage != nil {
|
|
return cachedImage, nil
|
|
}
|
|
}
|
|
|
|
// Otherwise, initialize image as usual
|
|
return RetrieveRemoteImage(currentBaseName, opts.RegistryOptions, opts.CustomPlatform)
|
|
}
|
|
|
|
func tarballImage(index int) (v1.Image, error) {
|
|
tarPath := filepath.Join(config.KanikoIntermediateStagesDir, strconv.Itoa(index))
|
|
logrus.Infof("Base image from previous stage %d found, using saved tar at path %s", index, tarPath)
|
|
return tarball.ImageFromPath(tarPath, nil)
|
|
}
|
|
|
|
func cachedImage(opts *config.KanikoOptions, image string) (v1.Image, error) {
|
|
ref, err := name.ParseReference(image, name.WeakValidation)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
var cacheKey string
|
|
if d, ok := ref.(name.Digest); ok {
|
|
cacheKey = d.DigestStr()
|
|
} else {
|
|
image, err := remote.RetrieveRemoteImage(image, opts.RegistryOptions, opts.CustomPlatform)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
d, err := image.Digest()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
cacheKey = d.String()
|
|
}
|
|
return cache.LocalSource(&opts.CacheOptions, cacheKey)
|
|
}
|