/pkg/cli (tsdump): add interval to metrics before uploading

This commit adds a new `interval` field to the `DatadogSeries` struct to
represent the interval in seconds.

The interval is encoded in the keys used to store metrics in the TSDB.
It can either be 10s or 1800s (30min). Recent metrics use a 10s interval,
while older metrics (typically 10 days or older) that have been rolled up
use a 30min interval.

Part of: CC-32614
Release note: None

Author: arjunmahishi

pkg/cli/tsdump_upload.go

@@ -86,6 +86,7 @@ type DatadogSeries struct {
 	Metric    string         `json:"metric"`
 	Type      int            `json:"type"`
 	Points    []DatadogPoint `json:"points"`
+	Interval  int            `json:"interval,omitempty"`
 	Resources []struct {
 		Name string `json:"name"`
 		Type string `json:"type"`
@@ -201,7 +202,7 @@ func appendTag(series *DatadogSeries, tagKey, tagValue string) {
 }
 
 func (d *datadogWriter) dump(kv *roachpb.KeyValue) (*DatadogSeries, error) {
-	name, source, _, _, err := ts.DecodeDataKey(kv.Key)
+	name, source, res, _, err := ts.DecodeDataKey(kv.Key)
 	if err != nil {
 		return nil, err
 	}
@@ -211,10 +212,11 @@ func (d *datadogWriter) dump(kv *roachpb.KeyValue) (*DatadogSeries, error) {
 	}
 
 	series := &DatadogSeries{
-		Metric: name,
-		Tags:   []string{},
-		Type:   d.resolveMetricType(name),
-		Points: make([]DatadogPoint, idata.SampleCount()),
+		Metric:   name,
+		Tags:     []string{},
+		Type:     d.resolveMetricType(name),
+		Points:   make([]DatadogPoint, idata.SampleCount()),
+		Interval: int(res.SlabDuration()) / int(time.Second), // covert from time.Duration to number of seconds.
 	}
 
 	sl := reCrStoreNode.FindStringSubmatch(name)