add telemetry (#6926)

* add telemetry

* fix go mod

* add default telemetry server url

* Update README.md

* replace with broker count instead of s3 count

* Update telemetry.pb.go

* github action to deploy

weed/telemetry/client.go

@@ -0,0 +1,100 @@
+package telemetry
+
+import (
+	"bytes"
+	"fmt"
+	"net/http"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/seaweedfs/seaweedfs/telemetry/proto"
+	"github.com/seaweedfs/seaweedfs/weed/glog"
+	protobuf "google.golang.org/protobuf/proto"
+)
+
+type Client struct {
+	url        string
+	enabled    bool
+	instanceID string
+	httpClient *http.Client
+}
+
+// NewClient creates a new telemetry client
+func NewClient(url string, enabled bool) *Client {
+	return &Client{
+		url:        url,
+		enabled:    enabled,
+		instanceID: uuid.New().String(), // Generate UUID in memory only
+		httpClient: &http.Client{
+			Timeout: 10 * time.Second,
+		},
+	}
+}
+
+// IsEnabled returns whether telemetry is enabled
+func (c *Client) IsEnabled() bool {
+	return c.enabled && c.url != ""
+}
+
+// SendTelemetry sends telemetry data synchronously using protobuf format
+func (c *Client) SendTelemetry(data *proto.TelemetryData) error {
+	if !c.IsEnabled() {
+		return nil
+	}
+
+	// Set the cluster ID
+	data.ClusterId = c.instanceID
+
+	return c.sendProtobuf(data)
+}
+
+// SendTelemetryAsync sends telemetry data asynchronously
+func (c *Client) SendTelemetryAsync(data *proto.TelemetryData) {
+	if !c.IsEnabled() {
+		return
+	}
+
+	go func() {
+		if err := c.SendTelemetry(data); err != nil {
+			glog.V(1).Infof("Failed to send telemetry: %v", err)
+		}
+	}()
+}
+
+// sendProtobuf sends data using protobuf format
+func (c *Client) sendProtobuf(data *proto.TelemetryData) error {
+	req := &proto.TelemetryRequest{
+		Data: data,
+	}
+
+	body, err := protobuf.Marshal(req)
+	if err != nil {
+		return fmt.Errorf("failed to marshal protobuf: %v", err)
+	}
+
+	httpReq, err := http.NewRequest("POST", c.url, bytes.NewBuffer(body))
+	if err != nil {
+		return fmt.Errorf("failed to create request: %v", err)
+	}
+
+	httpReq.Header.Set("Content-Type", "application/x-protobuf")
+	httpReq.Header.Set("User-Agent", fmt.Sprintf("SeaweedFS/%s", data.Version))
+
+	resp, err := c.httpClient.Do(httpReq)
+	if err != nil {
+		return fmt.Errorf("failed to send request: %v", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return fmt.Errorf("server returned status %d", resp.StatusCode)
+	}
+
+	glog.V(2).Infof("Telemetry sent successfully via protobuf")
+	return nil
+}
+
+// GetInstanceID returns the current instance ID
+func (c *Client) GetInstanceID() string {
+	return c.instanceID
+}