# MinIO GCS Gateway [](https://slack.min.io) MinIO GCS Gateway allows you to access Google Cloud Storage (GCS) with Amazon S3-compatible APIs - [Run MinIO Gateway for GCS](#run-minio-gateway-for-gcs) - [Test Using MinIO Browser](#test-using-minio-browser) - [Test Using MinIO Client](#test-using-minio-client) ## <a name="run-minio-gateway-for-gcs"></a>1. Run MinIO Gateway for GCS ### 1.1 Create a Service Account key for GCS and get the Credentials File 1. Navigate to the [API Console Credentials page](https://console.developers.google.com/project/_/apis/credentials). 2. Select a project or create a new project. Note the project ID. 3. Select the **Create credentials** dropdown on the **Credentials** page, and click **Service account key**. 4. Select **New service account** from the **Service account** dropdown. 5. Populate the **Service account name** and **Service account ID**. 6. Click the dropdown for the **Role** and choose **Storage** > **Storage Admin** *(Full control of GCS resources)*. 7. Click the **Create** button to download a credentials file and rename it to `credentials.json`. **Note:** For alternate ways to set up *Application Default Credentials*, see [Setting Up Authentication for Server to Server Production Applications](https://developers.google.com/identity/protocols/application-default-credentials). ### 1.2 Run MinIO GCS Gateway Using Docker ```sh docker run -p 9000:9000 --name gcs-s3 \ -v /path/to/credentials.json:/credentials.json \ -e "GOOGLE_APPLICATION_CREDENTIALS=/credentials.json" \ -e "MINIO_ACCESS_KEY=minioaccountname" \ -e "MINIO_SECRET_KEY=minioaccountkey" \ minio/minio gateway gcs yourprojectid ``` ### 1.3 Run MinIO GCS Gateway Using the MinIO Binary ```sh export GOOGLE_APPLICATION_CREDENTIALS=/path/to/credentials.json export MINIO_ACCESS_KEY=minioaccesskey export MINIO_SECRET_KEY=miniosecretkey minio gateway gcs yourprojectid ``` ## <a name="test-using-minio-browser"></a>2. Test Using MinIO Browser MinIO Gateway comes with an embedded web-based object browser that outputs content to http://127.0.0.1:9000. To test that MinIO Gateway is running, open a web browser, navigate to http://127.0.0.1:9000, and ensure that the object browser is displayed.  ## <a name="test-using-minio-client"></a>3. Test Using MinIO Client MinIO Client is a command-line tool called `mc` that provides UNIX-like commands for interacting with the server (e.g. ls, cat, cp, mirror, diff, find, etc.). `mc` supports file systems and Amazon S3-compatible cloud storage services (AWS Signature v2 and v4). ### 3.1 Configure the Gateway using MinIO Client Use the following command to configure the gateway: ```sh mc alias set mygcs http://gateway-ip:9000 minioaccesskey miniosecretkey ``` ### 3.2 List Containers on GCS Use the following command to list the containers on GCS: ```sh mc ls mygcs ``` A response similar to this one should be displayed: ``` [2017-02-22 01:50:43 PST] 0B ferenginar/ [2017-02-26 21:43:51 PST] 0B my-container/ [2017-02-26 22:10:11 PST] 0B test-container1/ ``` ### 3.3 Known limitations MinIO Gateway has the following limitations when used with GCS: * It only supports read-only and write-only bucket policies at the bucket level; all other variations will return `API Not implemented`. * The `List Multipart Uploads` and `List Object parts` commands always return empty lists. Therefore, the client must store all of the parts that it has uploaded and use that information when invoking the `_Complete Multipart Upload` command. Other limitations: * Bucket notification APIs are not supported. ## <a name="explore-further"></a>4. 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)