Rename replication target handler (#10142)

Rename replication target handler to a generic bucket target handler

pkg/madmin/remote-target-commands.go

@@ -0,0 +1,177 @@
+/*
+ * MinIO Cloud Storage, (C) 2020 MinIO, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package madmin
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"net/url"
+
+	"github.com/minio/minio/pkg/auth"
+)
+
+// ArnType represents bucket ARN type
+type ArnType string
+
+const (
+	// Replication specifies a ARN type of replication
+	Replication ArnType = "replication"
+)
+
+// IsValid returns true if ARN type is replication
+func (t ArnType) IsValid() bool {
+	return t == Replication
+}
+
+// BucketTarget represents the target bucket and site association.
+type BucketTarget struct {
+	Endpoint     string            `json:"endpoint"`
+	Credentials  *auth.Credentials `json:"credentials"`
+	TargetBucket string            `json:"targetbucket"`
+	Secure       bool              `json:"secure"`
+	Path         string            `json:"path,omitempty"`
+	API          string            `json:"api,omitempty"`
+	Arn          string            `json:"arn,omitempty"`
+	Type         ArnType           `json:"type"`
+}
+
+// URL returns replication target url
+func (t BucketTarget) URL() string {
+	scheme := "http"
+	if t.Secure {
+		scheme = "https"
+	}
+	return fmt.Sprintf("%s://%s", scheme, t.Endpoint)
+}
+
+// Empty returns true if struct is empty.
+func (t BucketTarget) Empty() bool {
+	return t.String() == "" || t.Credentials == nil
+}
+
+func (t *BucketTarget) String() string {
+	return fmt.Sprintf("%s %s", t.Endpoint, t.TargetBucket)
+}
+
+// GetBucketTarget - gets target for this bucket
+func (adm *AdminClient) GetBucketTarget(ctx context.Context, bucket string) (target BucketTarget, err error) {
+	queryValues := url.Values{}
+	queryValues.Set("bucket", bucket)
+
+	reqData := requestData{
+		relPath:     adminAPIPrefix + "/get-bucket-target",
+		queryValues: queryValues,
+	}
+
+	// Execute GET on /minio/admin/v3/get-bucket-target
+	resp, err := adm.executeMethod(ctx, http.MethodGet, reqData)
+
+	defer closeResponse(resp)
+	if err != nil {
+		return target, err
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		return target, httpRespToErrorResponse(resp)
+	}
+
+	b, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return target, err
+	}
+	if err = json.Unmarshal(b, &target); err != nil {
+		return target, err
+	}
+	if target.Empty() {
+		return target, errors.New("No bucket target configured")
+	}
+	return target, nil
+}
+
+// SetBucketTarget sets up a remote target for this bucket
+func (adm *AdminClient) SetBucketTarget(ctx context.Context, bucket string, target *BucketTarget) error {
+	data, err := json.Marshal(target)
+	if err != nil {
+		return err
+	}
+	encData, err := EncryptData(adm.getSecretKey(), data)
+	if err != nil {
+		return err
+	}
+	queryValues := url.Values{}
+	queryValues.Set("bucket", bucket)
+
+	reqData := requestData{
+		relPath:     adminAPIPrefix + "/set-bucket-target",
+		queryValues: queryValues,
+		content:     encData,
+	}
+
+	// Execute PUT on /minio/admin/v3/set-bucket-replication-target to set a replication target for this bucket.
+	resp, err := adm.executeMethod(ctx, http.MethodPut, reqData)
+
+	defer closeResponse(resp)
+	if err != nil {
+		return err
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		return httpRespToErrorResponse(resp)
+	}
+
+	return nil
+}
+
+// GetBucketTargetARN - gets Arn for this remote target
+func (adm *AdminClient) GetBucketTargetARN(ctx context.Context, rURL string) (arn string, err error) {
+	queryValues := url.Values{}
+	queryValues.Set("url", rURL)
+
+	reqData := requestData{
+		relPath:     adminAPIPrefix + "/get-bucket-target-arn",
+		queryValues: queryValues,
+	}
+
+	// Execute GET on /minio/admin/v3/list-bucket-target-arn
+	resp, err := adm.executeMethod(ctx, http.MethodGet, reqData)
+
+	defer closeResponse(resp)
+	if err != nil {
+		return arn, err
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		return arn, httpRespToErrorResponse(resp)
+	}
+
+	b, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return arn, err
+	}
+	if err = json.Unmarshal(b, &arn); err != nil {
+		return arn, err
+	}
+	if arn == "" {
+		return arn, fmt.Errorf("Missing target ARN")
+	}
+	return arn, nil
+}