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minio/docs/gateway/s3.md

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# Minio S3 Gateway [![Slack](https://slack.minio.io/slack?type=svg)](https://slack.minio.io)
Minio S3 Gateway adds Minio features like Minio Browser and disk caching to AWS S3 or any other AWS S3 compatible service.
## Run Minio Gateway for AWS S3
As a prerequisite to run Minio S3 gateway, you need valid AWS S3 access key and secret key by default. Optionally you can also set custom access/secret key, when you have rotating AWS IAM credentials or AWS credentials through environment variables (i.e. AWS_ACCESS_KEY_ID)
### Using Docker
```
docker run -p 9000:9000 --name minio-s3 \
-e "MINIO_ACCESS_KEY=aws_s3_access_key" \
-e "MINIO_SECRET_KEY=aws_s3_secret_key" \
minio/minio gateway s3
```
### Using Binary
```
export MINIO_ACCESS_KEY=aws_s3_access_key
export MINIO_SECRET_KEY=aws_s3_secret_key
minio gateway s3
```
### Using Binary in EC2
Using IAM rotating credentials for AWS S3
```
export MINIO_ACCESS_KEY=custom_access_key
export MINIO_SECRET_KEY=custom_secret_key
minio gateway s3
```
Minio gateway will automatically look for list of credential styles in following order.
- AWS env vars (i.e. AWS_ACCESS_KEY_ID)
- IAM profile based credentials. (performs an HTTP call to a pre-defined endpoint, only valid inside configured ec2 instances)
- AWS creds file (i.e. AWS_SHARED_CREDENTIALS_FILE or ~/.aws/credentials)
## Run Minio Gateway for AWS S3 compatible services
As a prerequisite to run Minio S3 gateway on an AWS S3 compatible service, you need valid access key, secret key and service endpoint.
### Using Docker
```
docker run -p 9000:9000 --name minio-s3 \
-e "MINIO_ACCESS_KEY=access_key" \
-e "MINIO_SECRET_KEY=secret_key" \
minio/minio gateway s3 https://s3_compatible_service_endpoint:port
```
### Using Binary
```
export MINIO_ACCESS_KEY=access_key
export MINIO_SECRET_KEY=secret_key
minio gateway s3 https://s3_compatible_service_endpoint:port
```
## Minio Caching
Minio edge caching allows storing content closer to the applications. Frequently accessed objects are stored in a local disk based cache. Edge caching with Minio gateway feature allows
- Dramatic improvements for time to first byte for any object.
- Avoid S3 [data transfer charges](https://aws.amazon.com/s3/pricing/).
Refer [this document](https://docs.minio.io/docs/minio-disk-cache-guide.html) to get started with Minio Caching.
## 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://github.com/minio/minio/blob/master/docs/screenshots/minio-browser-gateway.png?raw=true)
With Minio S3 gateway, you can use Minio browser to explore AWS S3 based objects.
### Known limitations
- Bucket notification APIs are not supported.
## Explore Further
- [`mc` command-line interface](https://docs.minio.io/docs/minio-client-quickstart-guide)
- [`aws` command-line interface](https://docs.minio.io/docs/aws-cli-with-minio)
- [`minio-go` Go SDK](https://docs.minio.io/docs/golang-client-quickstart-guide)