feat: opensearch客户端初始化 feat: 索引模板接口 ai: 开发准则 chore: TDD流水线脚本

operations/cluster/cluster.go

@@ -0,0 +1,58 @@
+// Package cluster provides cluster-level operations for OpenSearch administration.
+package cluster
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"os"
+
+	"es-demo/client"
+
+	"github.com/opensearch-project/opensearch-go/v2/opensearchapi"
+)
+
+// Info represents essential information about the OpenSearch cluster.
+type Info struct {
+	Name        string `json:"name"`
+	ClusterName string `json:"cluster_name"`
+	ClusterUUID string `json:"cluster_uuid"`
+	Version     struct {
+		Number                           string `json:"number"`
+		BuildType                        string `json:"build_type"`
+		BuildHash                        string `json:"build_hash"`
+		BuildDate                        string `json:"build_date"`
+		BuildSnapshot                    bool   `json:"build_snapshot"`
+		LuceneVersion                    string `json:"lucene_version"`
+		MinimumWireCompatibilityVersion  string `json:"minimum_wire_compatibility_version"`
+		MinimumIndexCompatibilityVersion string `json:"minimum_index_compatibility_version"`
+	} `json:"version"`
+	Tagline string `json:"tagline"`
+}
+
+// GetInfo retrieves essential information about the OpenSearch cluster.
+// It returns the cluster information or an error if the request fails.
+func GetInfo(ctx context.Context, c *client.Client) (*Info, error) {
+	req := opensearchapi.InfoRequest{}
+
+	res, err := req.Do(ctx, c.GetClient())
+	if err != nil {
+		return nil, fmt.Errorf("failed to execute info request: %w", err)
+	}
+	defer func() {
+		if closeErr := res.Body.Close(); closeErr != nil {
+			fmt.Fprintf(os.Stderr, "warning: failed to close response body: %v\n", closeErr)
+		}
+	}()
+
+	if res.IsError() {
+		return nil, fmt.Errorf("request failed with status: %s", res.Status())
+	}
+
+	var info Info
+	if err := json.NewDecoder(res.Body).Decode(&info); err != nil {
+		return nil, fmt.Errorf("failed to decode cluster info: %w", err)
+	}
+
+	return &info, nil
+}