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84 lines
2.9 KiB
84 lines
2.9 KiB
8 years ago
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/*
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* Minio Cloud Storage, (C) 2016 Minio, Inc.
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*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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 main
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import (
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"bytes"
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"io/ioutil"
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"os"
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"path/filepath"
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"strings"
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)
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const policyJSON = "policy.json"
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func getBucketFromPolicyPath(oldPolicyPath string) string {
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bucketPrefix, _ := filepath.Split(oldPolicyPath)
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_, bucketName := filepath.Split(strings.TrimSuffix(bucketPrefix, slashSeparator))
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return bucketName
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}
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func cleanupOldBucketPolicyConfigs() error {
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// Get old bucket policy config directory.
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oldBucketsConfigDir, err := getOldBucketsConfigPath()
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fatalIf(err, "Unable to fetch buckets config path to migrate bucket policy")
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// Recursively remove configDir/buckets/ - old bucket policy config location.
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// N B This is called only if all bucket policies were successfully migrated.
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return os.RemoveAll(oldBucketsConfigDir)
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}
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func migrateBucketPolicyConfig(objAPI ObjectLayer) error {
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// Get old bucket policy config directory.
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oldBucketsConfigDir, err := getOldBucketsConfigPath()
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fatalIf(err, "Unable to fetch buckets config path to migrate bucket policy")
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// Check if config directory holding bucket policy exists before
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// migration.
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_, err = os.Stat(oldBucketsConfigDir)
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if os.IsNotExist(err) {
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return nil
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}
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if err != nil {
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return err
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}
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// WalkFunc that migrates access-policy.json to
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// .minio.sys/buckets/bucketName/policy.json on all disks.
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migrateBucketPolicy := func(policyPath string, fileInfo os.FileInfo, err error) error {
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// policyFile - e.g /configDir/sample-bucket/access-policy.json
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if err != nil {
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return err
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}
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// Skip entries that aren't bucket policy files.
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if fileInfo.Name() != "access-policy.json" {
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return nil
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}
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// Get bucketName from old policy file path.
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bucketName := getBucketFromPolicyPath(policyPath)
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// Read bucket policy config from old location.
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policyBytes, err := ioutil.ReadFile(policyPath)
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fatalIf(err, "Unable to read bucket policy to migrate bucket policy", policyPath)
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newPolicyPath := retainSlash(bucketConfigPrefix) + retainSlash(bucketName) + policyJSON
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// Erasure code the policy config to all the disks.
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_, err = objAPI.PutObject(minioMetaBucket, newPolicyPath, int64(len(policyBytes)), bytes.NewReader(policyBytes), nil)
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fatalIf(err, "Unable to write bucket policy during migration.", newPolicyPath)
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return nil
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}
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return filepath.Walk(oldBucketsConfigDir, migrateBucketPolicy)
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}
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