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Merge pull request #33 from Luzilla/bucket-management
Update(ostor): bucket management
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,110 @@ | ||
| // Package s3 simulates an administrative interface for people who maintain ostor | ||
| // this package wraps around ostor and minio/minio-go to executes calls on behalf | ||
| // of accounts in the system. This is achieved by returning an account's credential | ||
| // pair and using it for calls. It requires that an account has one. You can call | ||
| // the key management features in the ostor CLI to achieve that or use the user methods | ||
| // in the ostor package to achieve the same. | ||
| package s3 | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| log "log/slog" | ||
| "net/url" | ||
| "os" | ||
|
|
||
| "github.com/Luzilla/acronis-s3-usage/pkg/ostor" | ||
| "github.com/minio/minio-go/v7" | ||
| "github.com/minio/minio-go/v7/pkg/credentials" | ||
| ) | ||
|
|
||
| // S3 wraps the s3 client to provide shorthands for common ops. | ||
| type S3 struct { | ||
| mc *minio.Client | ||
| } | ||
|
|
||
| // NewS3 creates an S3 handler which is specific to the provided email. | ||
| func NewS3(endpointURL, email string, ostorClient *ostor.Ostor) (*S3, error) { | ||
| endpoint, err := url.Parse(endpointURL) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("unable to parse %s: %s", endpoint, err) | ||
| } | ||
|
|
||
| user, _, err := ostorClient.GetUser(email) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| if len(user.AccessKeys) == 0 { | ||
| return nil, fmt.Errorf("account has no keys, please generate a key-pair first") | ||
| } | ||
|
|
||
| keyPair := user.AccessKeys[0] | ||
|
|
||
| mc, err := minio.New(endpoint.Host, &minio.Options{ | ||
| Creds: credentials.NewStaticV4( | ||
| keyPair.AccessKeyID, | ||
| keyPair.SecretAccessKey, | ||
| ""), | ||
| Secure: true, | ||
| }) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("unable to initialize s3 client: %s", err) | ||
| } | ||
|
|
||
| return &S3{mc: mc}, nil | ||
| } | ||
|
|
||
| // IsDeletable determines if a bucket exists and if is empty | ||
| func (s *S3) IsDeletable(ctx context.Context, bucketName string) (status bool, err error) { | ||
| status, err = s.mc.BucketExists(ctx, bucketName) | ||
| if err != nil { | ||
| err = fmt.Errorf("unable to check if the bucket %q exists: %s", bucketName, err) | ||
| return | ||
| } | ||
|
|
||
| if !status { | ||
| err = fmt.Errorf("bucket %q does not exist", bucketName) | ||
| return | ||
| } | ||
|
|
||
| listChan := s.mc.ListObjects(ctx, bucketName, minio.ListObjectsOptions{ | ||
| Recursive: true, | ||
| MaxKeys: 1, | ||
| }) | ||
| _, ok := <-listChan | ||
| if !ok { | ||
| status = false | ||
| err = fmt.Errorf("bucket %q is not empty", bucketName) | ||
| return | ||
| } | ||
|
|
||
| return | ||
| } | ||
|
|
||
| // DeleteBucket does a recursive delete on all objects within a bucket to empty it, before deleting it. | ||
| func (s *S3) DeleteBucket(ctx context.Context, bucketName string) error { | ||
| delChan := make(chan minio.ObjectInfo) | ||
|
|
||
| go func() { | ||
| defer close(delChan) | ||
| for object := range s.ListContents(ctx, bucketName) { | ||
| if object.Err != nil { | ||
| log.Error(object.Err.Error()) | ||
| os.Exit(1) | ||
| } | ||
| delChan <- object | ||
| } | ||
| }() | ||
|
|
||
| for rErr := range s.mc.RemoveObjects(ctx, bucketName, delChan, minio.RemoveObjectsOptions{}) { | ||
| log.Error("Error detected during deletion: " + rErr.Err.Error()) | ||
| } | ||
|
|
||
| return s.mc.RemoveBucket(ctx, bucketName) | ||
| } | ||
|
|
||
| // ListContents (recursively) lists the contents of a bucket and returns a channel to "range" on. | ||
| func (s *S3) ListContents(ctx context.Context, bucketName string) <-chan minio.ObjectInfo { | ||
| return s.mc.ListObjects(ctx, bucketName, minio.ListObjectsOptions{Recursive: true}) | ||
| } |