minio/docs/gateway/b2.md

# MinIO B2 Gateway [![Slack](https://slack.min.io/slack?type=svg)](https://slack.min.io)
MinIO Gateway adds Amazon S3 compatibility to Backblaze B2 Cloud Storage.

## Run MinIO Gateway for Backblaze B2 Cloud Storage
Please follow this [guide](https://www.backblaze.com/b2/docs/quick_account.html) to create an account on backblaze.com to obtain your access credentials for B2 Cloud storage.

### Using Docker
```
docker run -p 9000:9000 --name b2-s3 \
 -e "MINIO_ACCESS_KEY=b2_account_id" \
 -e "MINIO_SECRET_KEY=b2_application_key" \
 minio/minio gateway b2
```

### Using Binary
```
export MINIO_ACCESS_KEY=b2_account_id
export MINIO_SECRET_KEY=b2_application_key
minio gateway b2
```

## Test using MinIO Browser
MinIO Gateway comes with an embedded web based object browser. Point your web browser to http://127.0.0.1:9000 to ensure that your server has started successfully.

![Screenshot](https://raw.githubusercontent.com/minio/minio/master/docs/screenshots/minio-browser-gateway.png)

## Test using MinIO Client `mc`
`mc` provides a modern alternative to UNIX commands such as ls, cat, cp, mirror, diff etc. It supports filesystems and Amazon S3 compatible cloud storage services.

### Configure `mc`
```
mc config host add myb2 http://gateway-ip:9000 b2_account_id b2_application_key
```

### List buckets on Backblaze B2
```
mc ls myb2
[2017-02-22 01:50:43 PST]     0B ferenginar/
[2017-02-26 21:43:51 PST]     0B my-bucket/
[2017-02-26 22:10:11 PST]     0B test-bucket1/
```

### Known limitations
Gateway inherits the following B2 limitations:

- PutObject S3 API does not return the md5sum of an uploaded file as it's etag response. Applications that check the validity of the uploaded object by comparing these two values will fail.
- No support for CopyObject S3 API (There are no equivalent APIs available on Backblaze B2).
- No support for CopyObjectPart S3 API (There are no equivalent APIs available on Backblaze B2).
- Only read-only bucket policy supported at bucket level, all other variations will return API Notimplemented error.
- DeleteObject() might not delete the object right away on Backblaze B2, so you might see the object immediately after a Delete request.

Other limitations:

- Bucket notification APIs are not supported.

## Explore Further
- [`mc` command-line interface](https://docs.min.io/docs/minio-client-quickstart-guide)
- [`aws` command-line interface](https://docs.min.io/docs/aws-cli-with-minio)
- [`minio-go` Go SDK](https://docs.min.io/docs/golang-client-quickstart-guide)