stream, err := conn.NewStream(ctx, grid.HandlerDiskInfo, payload)
	if err != nil {
        return err
    }
    // Read results from the stream
    err = stream.Results(func(result []byte) error {
        fmt.Println("Got result", string(result))

        // Return the response for reuse
        grid.PutByteBuffer(result)
        return nil
    })
```

Context cancellation and timeouts are propagated to the handler. 

    $MC_COMMAND ;
    STATUS=$? ;
  done ;
  set -e ; # reset `e` as active
  return 0
}

# checkSvcacctExists ()
# Check if the svcacct exists, by using the exit code of `mc admin user svcacct info`
checkSvcacctExists() {
  CMD=$(${MC} admin user svcacct info myminio $(head -1 $MINIO_ACCESSKEY_SECRETKEY_TMP) > /dev/null 2>&1)
  return $?
}

# createSvcacct ($user)
createSvcacct () {
  USER=$1
  FILENAME=$2

PutObject API allows setting per object retention mode and retention duration using `x-amz-object-lock-mode` and `x-amz-object-lock-retain-until-date` headers. This takes precedence over any bucket object lock configuration w.r.t retention.

```sh
aws s3api put-object --bucket testbucket --key lockme --object-lock-mode GOVERNANCE --object-lock-retain-until-date "2019-11-20"  --body /etc/issue
```

```
~ mc admin config set myminio/
```

#### Obtain help for each key

```
~ mc admin config set myminio/ <key>
```

e.g: `mc admin config set myminio/ etcd` returns available `etcd` config args

```
~ mc admin config set play/ etcd
KEY:
etcd  federate multiple clusters for IAM and Bucket DNS

ARGS:

| *Required*    | *No*                                               |

### Policy

If the token is not valid or access is not approved, the plugin must return a `403` (forbidden) HTTP status code. The body must have an `application/json` content-type with the following structure:

```json
{
    "reason": <string>
}
```

The reason message is returned to the client.

## Example Plugin Implementation

      exit 1 ;
    fi ;
    sleep 2 ; # 1 second intervals between attempts
    $MC_COMMAND ;
    STATUS=$? ;
  done ;
  set -e ; # reset `e` as active
  return 0
}

# runCommand ($@)
# Run custom mc command
runCommand() {
  ${MC} "$@"
  return $?
}

# Try connecting to MinIO instance
{{- if .Values.tls.enabled }}
scheme=https
{{- else }}
scheme=http
{{- end }}
connectToMinio $scheme

		sleep 2 # 1 second intervals between attempts
		$MC_COMMAND
		STATUS=$?
	done
	set -e # reset `e` as active
	return 0
}

# checkBucketExists ($bucket)
# Check if the bucket exists, by using the exit code of `mc ls`
checkBucketExists() {
	BUCKET=$1
	CMD=$(${MC} stat myminio/$BUCKET >/dev/null 2>&1)
	return $?
}

# createBucket ($bucket, $policy, $purge)
# Ensure bucket exists, purging if asked to
createBucket() {

- MinIO verifies that the client certificate is valid.
- MinIO tries to find a policy that matches the `CN` of the client certificate.
- MinIO returns temp. S3 credentials associated to the found policy.

The returned credentials expiry after a certain period of time that can be configured via `&DurationSeconds=3600`. By default, the STS credentials are valid for 1 hour. The minimum expiration allowed is 15 minutes.

  failureThreshold: 3
```

## Cluster probe

### Cluster-writeable probe

The reply is '200 OK' if cluster has write quorum if not it returns '503 Service Unavailable'.

```
curl http://minio1:9001/minio/health/cluster
HTTP/1.1 503 Service Unavailable
Accept-Ranges: bytes
Content-Length: 0
Server: MinIO
Vary: Origin
X-Amz-Bucket-Region: us-east-1
X-Minio-Write-Quorum: 3
X-Amz-Request-Id: 16239D6AB80EBECF