Add AssumeRole support for rotating credentials

[harshavardhana]

No description provided.

[harshavardhana]

package main

import (
	"fmt"
	"log"

	"github.com/minio/minio-go/v6/pkg/credentials"
)

func main() {
	// Note: YOUR-ACCESSKEYID, YOUR-SECRETACCESSKEY, my-testfile, my-bucketname and
	// my-objectname are dummy values, please replace them with original values.

	// Requests are always secure (HTTPS) by default. Set secure=false to enable insecure (HTTP) access.
	// This boolean value is the last argument for New().

	// New returns an Amazon S3 compatible client object. API compatibility (v2 or v4) is automatically
	// determined based on the Endpoint value.
	creds, err := credentials.NewSTSAssumeRole("http://localhost:9000", credentials.STSAssumeRoleOptions{
		AccessKey: "harsha",
		SecretKey: "harsha123",
		Location:  "us-east-1",
	})
	if err != nil {
		log.Fatalln(err)
	}

	v, err := creds.Get()
	if err != nil {
		log.Fatalln(err)
	}

	fmt.Println(v)
	// mclnt, err := madmin.NewWithOptions("localhost:9000", &madmin.Options{
	// 	Creds:  creds,
	// 	Secure: false,
	// })
	// if err != nil {
	// 	log.Fatalln(err)
	// }

	// sinfo, err := mclnt.StorageInfo(context.Background())
	// if err != nil {
	// 	log.Fatalln(err)
	// }
	// fmt.Println(sinfo)
}

@Alevsk is the way to use this change.

[vadmeste]

Some comments.

@harshavardhana your test code doesn't seem to work with MinIO master (2020/04/13 14:53:02 400 Bad Request), is this expected ?

[harshavardhana]

Runs perfectly fine

~ go run /tmp/test.go 
{SC07LRYOTERWAOPEV7BN MIAr+eW2q1ygzJP+AyP0IfhnHRD5nhQuYKckOEsD eyJhbGciOiJIUzUxMiIsInR5cCI6IkpXVCJ9.eyJhY2Nlc3NLZXkiOiJTQzA3TFJZT1RFUldBT1BFVjdCTiIsImV4cCI6MzYwMDAwMDAwMDAwMCwicG9saWN5IjoicmV0In0.Q8pBOUStGLHYcUJY5zXMgtS6QkzlSvwtxC5zAMiWefENAOoshe7uehPYKFRtHvEPMcqovlbKUIrCG9YGKze1Yg S3v4}

@vadmeste

[vadmeste]

LGTM & tested