Add support for minio tier type (#14468)

cmd/warm-backend-minio.go

@@ -0,0 +1,68 @@
+// Copyright (c) 2015-2022 MinIO, Inc.
+//
+// This file is part of MinIO Object Storage stack
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package cmd
+
+import (
+	"net/url"
+	"strings"
+	"time"
+
+	"github.com/minio/madmin-go"
+	minio "github.com/minio/minio-go/v7"
+	"github.com/minio/minio-go/v7/pkg/credentials"
+)
+
+type warmBackendMinIO struct {
+	warmBackendS3
+}
+
+var _ WarmBackend = (*warmBackendMinIO)(nil)
+
+func newWarmBackendMinIO(conf madmin.TierMinIO) (*warmBackendMinIO, error) {
+	u, err := url.Parse(conf.Endpoint)
+	if err != nil {
+		return nil, err
+	}
+
+	creds := credentials.NewStaticV4(conf.AccessKey, conf.SecretKey, "")
+
+	getRemoteTierTargetInstanceTransportOnce.Do(func() {
+		getRemoteTierTargetInstanceTransport = newGatewayHTTPTransport(10 * time.Minute)
+	})
+	opts := &minio.Options{
+		Creds:     creds,
+		Secure:    u.Scheme == "https",
+		Transport: getRemoteTierTargetInstanceTransport,
+	}
+	client, err := minio.New(u.Host, opts)
+	if err != nil {
+		return nil, err
+	}
+	core, err := minio.NewCore(u.Host, opts)
+	if err != nil {
+		return nil, err
+	}
+	return &warmBackendMinIO{
+		warmBackendS3{
+			client: client,
+			core:   core,
+			Bucket: conf.Bucket,
+			Prefix: strings.TrimSuffix(conf.Prefix, slashSeparator),
+		},
+	}, nil
+}