80 lines
2.4 KiB
Go
80 lines
2.4 KiB
Go
/*
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Copyright 2018 Google LLC
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package buildcontext
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import (
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"context"
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"errors"
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"net/url"
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"os"
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"path/filepath"
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"strings"
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"github.com/Azure/azure-storage-blob-go/azblob"
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"github.com/GoogleContainerTools/kaniko/pkg/constants"
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"github.com/GoogleContainerTools/kaniko/pkg/util"
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)
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// AzureBlob struct for Azure Blob Storage processing
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type AzureBlob struct {
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context string
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}
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// Download context file from given azure blob storage url and unpack it to BuildContextDir
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func (b *AzureBlob) UnpackTarFromBuildContext() (string, error) {
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// Get Azure_STORAGE_ACCESS_KEY from environment variables
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accountKey := os.Getenv("AZURE_STORAGE_ACCESS_KEY")
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if len(accountKey) == 0 {
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return "", errors.New("AZURE_STORAGE_ACCESS_KEY environment variable is not set")
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}
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// Get storage accountName for Azure Blob Storage
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u, _ := url.Parse(b.context)
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parts := azblob.NewBlobURLParts(*u)
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accountName := strings.Split(parts.Host, ".")[0]
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// Generate credential with accountName and accountKey
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credential, err := azblob.NewSharedKeyCredential(accountName, accountKey)
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if err != nil {
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return parts.Host, err
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}
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// Create directory and target file for downloading the context file
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directory := constants.BuildContextDir
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tarPath := filepath.Join(directory, constants.ContextTar)
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file, err := util.CreateTargetTarfile(tarPath)
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if err != nil {
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return tarPath, err
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}
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// Downloading context file from Azure Blob Storage
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p := azblob.NewPipeline(credential, azblob.PipelineOptions{})
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blobURL := azblob.NewBlobURL(*u, p)
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ctx := context.Background()
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if err := azblob.DownloadBlobToFile(ctx, blobURL, 0, 0, file, azblob.DownloadFromBlobOptions{}); err != nil {
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return parts.Host, err
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}
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if err := util.UnpackCompressedTar(tarPath, directory); err != nil {
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return tarPath, err
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}
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// Remove the tar so it doesn't interfere with subsequent commands
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return directory, os.Remove(tarPath)
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}
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