Add mt-parrot command to generate deterministic artificial metrics fo…

…r each metrictank partition.

.gitignore

@@ -16,6 +16,7 @@
 /cmd/mt-kafka-mdm-sniff/mt-kafka-mdm-sniff
 /cmd/mt-kafka-persist-sniff/mt-kafka-persist-sniff
 /cmd/mt-keygen/mt-keygen
+/cmd/mt-parrot/mt-parrot
 /cmd/mt-schemas-explain/mt-schemas-explain
 /cmd/mt-split-metrics-by-ttl/mt-split-metrics-by-ttl
 /cmd/mt-store-cat/mt-store-cat

cmd/mt-parrot/generate.go

@@ -0,0 +1,62 @@
+package main
+
+import (
+	"fmt"
+	log "github.com/sirupsen/logrus"
+	"time"
+
+	"github.com/grafana/metrictank/schema"
+)
+
+func produceArtificialMetrics(schemas []*schema.MetricData) {
+	for tick := range time.NewTicker(artificialMetricsInterval).C {
+		for _, metric := range schemas {
+			metric.Time = tick.Unix()
+			metric.Value = float64(tick.Unix())
+		}
+		gateway.Flush(schemas)
+		log.Infof("flushed schemas for ts %d", tick.Unix())
+	}
+}
+
+//generateSchemas generates a MetricData that hashes to each of numPartitions partitions
+func generateSchemas(numPartitions int32) []*schema.MetricData {
+	var metrics []*schema.MetricData
+	for i := int32(0); i < numPartitions; i++ {
+		metrics = append(metrics, generateSchema(i))
+	}
+	return metrics
+}
+
+//generateSchema generates a single MetricData that hashes to the given partition
+func generateSchema(desiredPartition int32) *schema.MetricData {
+	metric := schema.MetricData{
+		OrgId:    orgId,
+		Unit:     "partyparrots",
+		Mtype:    "gauge",
+		Interval: int(artificialMetricsInterval.Seconds()),
+	}
+
+	for i := 1; true; i++ {
+		metric.Name = fmt.Sprintf("parrot.testdata.%d.generated.%s", desiredPartition, generatePartitionSuffix(i))
+		id, err := metric.PartitionID(partitionMethod, partitionCount)
+		if err != nil {
+			log.Fatal(err)
+		}
+		if id == desiredPartition {
+			log.Infof("metric for partition %d: %s", desiredPartition, metric.Name)
+			return &metric
+		}
+	}
+	return nil
+}
+
+var alphabet = []rune("abcdefghijklmnopqrstuvwxyz")
+
+//generatePartitionSuffix deterministically generates a suffix for partition by brute force
+func generatePartitionSuffix(i int) string {
+	if i == 0 {
+		return ""
+	}
+	return generatePartitionSuffix(i/26) + string(alphabet[i%26])
+}

cmd/mt-parrot/main.go

@@ -0,0 +1,91 @@
+package main
+
+import (
+	"github.com/grafana/metrictank/cmd/mt-fakemetrics/out"
+	"github.com/grafana/metrictank/cmd/mt-fakemetrics/out/gnet"
+	"github.com/grafana/metrictank/logger"
+	"github.com/grafana/metrictank/schema"
+	"github.com/raintank/met/statsd"
+	log "github.com/sirupsen/logrus"
+	"github.com/spf13/cobra"
+	"time"
+)
+
+var (
+	gatewayAddress            string
+	gatewayKey                string
+	orgId                     int
+	partitionCount            int32
+	partitionMethodString     string
+	artificialMetricsInterval time.Duration
+	queryInterval             time.Duration
+	logLevel                  string
+
+	partitionMethod schema.PartitionByMethod
+	gateway         out.Out
+)
+
+func init() {
+	parrotCmd.Flags().StringVar(&gatewayAddress, "gateway-address", "http://localhost:6059/metrics", "the url of the metrics gateway to publish to")
+	parrotCmd.Flags().StringVar(&gatewayKey, "gateway-key", "", "the bearer token to include with gateway requests")
+	parrotCmd.Flags().IntVar(&orgId, "org-id", 1, "org id to publish parrot metrics to")
+	parrotCmd.Flags().Int32Var(&partitionCount, "partition-count", 8, "number of partitions to publish parrot metrics to")
+	parrotCmd.Flags().StringVar(&partitionMethodString, "partition-method", "bySeries", "the partition method to use, must be one of bySeries|bySeriesWithTags|bySeriesWithTagsFnv")
+	parrotCmd.Flags().DurationVar(&artificialMetricsInterval, "artificial-metrics-interval", 5*time.Second, "interval to send metrics")
+	parrotCmd.Flags().DurationVar(&queryInterval, "query-interval", 10*time.Second, "interval to query to validate metrics")
+
+	parrotCmd.Flags().StringVar(&logLevel, "log-level", "info", "log level. panic|fatal|error|warning|info|debug")
+
+	formatter := &logger.TextFormatter{}
+	formatter.TimestampFormat = "2006-01-02 15:04:05.000"
+	log.SetFormatter(formatter)
+}
+
+func main() {
+	err := parrotCmd.Execute()
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+
+var parrotCmd = &cobra.Command{
+	Use:   "parrot",
+	Short: "generate deterministic metrics for each metrictank partition",
+	Run: func(cmd *cobra.Command, args []string) {
+		lvl, err := log.ParseLevel(logLevel)
+		if err != nil {
+			log.Fatalf("failed to parse log-level, %s", err.Error())
+		}
+		log.SetLevel(lvl)
+		parsePartitionMethod()
+		initGateway()
+
+		schemas := generateSchemas(partitionCount)
+		go produceArtificialMetrics(schemas)
+
+		monitor()
+	},
+}
+
+//parsePartitionMethod parses the partitionScheme cli flag,
+//exiting if an invalid partition schema is entered or if org based partitioning is used (not currently allowed by parrot).
+func parsePartitionMethod() {
+	var err error
+	partitionMethod, err = schema.PartitonMethodFromString(partitionMethodString)
+	if err != nil {
+		log.Fatal(err)
+	}
+	if partitionMethod == schema.PartitionByOrg {
+		log.Fatal("byOrg not supported")
+	}
+}
+
+func initGateway() {
+	var err error
+	backend, _ := statsd.New(false, "", "")
+	gateway, err = gnet.New(gatewayAddress, gatewayKey, backend)
+	if err != nil {
+		log.Fatal(err)
+	}
+	log.Info("gateway initialized")
+}

cmd/mt-parrot/monitor.go

@@ -0,0 +1,81 @@
+package main
+
+import (
+	"fmt"
+	"github.com/grafana/metrictank/stacktest/graphite"
+	log "github.com/sirupsen/logrus"
+	"math"
+	"net/http"
+	"strconv"
+	"time"
+)
+
+type seriesStats struct {
+	lastTs uint32
+	//the partition currently being checked
+	partition int32
+	//the number of nans present in the time series
+	nans int32
+	//the sum of abs(value - ts) across the time series
+	deltaSum float64
+	//the number of timestamps where value != ts
+	numNonMatching int32
+
+	//tracks the last seen non-NaN time stamp (useful for lag
+	lastSeen uint32
+}
+
+func monitor() {
+	for range time.NewTicker(queryInterval).C {
+
+		query := graphite.ExecuteRenderQuery(buildRequest())
+
+		for _, s := range query.Decoded {
+			log.Infof("%d - %d", s.Datapoints[0].Ts, s.Datapoints[len(s.Datapoints)-1].Ts)
+
+			stats := seriesStats{}
+			stats.lastTs = s.Datapoints[len(s.Datapoints)-1].Ts
+
+			for _, dp := range s.Datapoints {
+
+				if math.IsNaN(dp.Val) {
+					stats.nans += 1
+					continue
+				}
+				if diff := dp.Val - float64(dp.Ts); diff != 0 {
+					stats.lastSeen = dp.Ts
+					stats.deltaSum += diff
+					stats.numNonMatching += 1
+				}
+			}
+
+			//TODO create/emit metrics for each partition
+
+			//number of missing values for each series
+			fmt.Printf("parrot.monitoring.nanCount;partition=%d; %d\n", stats.partition, stats.nans)
+			//time since the last value was recorded
+			fmt.Printf("parrot.monitoring.lag;partition=%d; %d\n", stats.partition, stats.lastTs-stats.lastSeen)
+			//total amount of drift between expected value and actual values
+			fmt.Printf("parrot.monitoring.deltaSum;partition=%d; %f\n", stats.partition, stats.deltaSum)
+			//total number of entries where drift occurred
+			fmt.Printf("parrot.monitoring.nonMatching;partition=%d; %d\n", stats.partition, stats.numNonMatching)
+			fmt.Println()
+		}
+	}
+}
+
+func buildRequest() *http.Request {
+	req, _ := http.NewRequest("GET", fmt.Sprintf("%s/render", gatewayAddress), nil)
+	q := req.URL.Query()
+	q.Set("target", "parrot.testdata.*.generated.*")
+	//TODO parameterize this
+	q.Set("from", "-5min")
+	q.Set("until", "now")
+	q.Set("format", "json")
+	q.Set("X-Org-Id", strconv.Itoa(orgId))
+	req.URL.RawQuery = q.Encode()
+	if len(gatewayKey) != 0 {
+		req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", gatewayKey))
+	}
+	return req
+}

docs/tools.md

@@ -553,6 +553,27 @@ It prints the MKey
 ```
 
 
+## mt-parrot
+
+```
+generate deterministic metrics for each metrictank partition
+
+Usage:
+  parrot [flags]
+
+Flags:
+      --artificial-metrics-interval duration   interval to send metrics (default 5s)
+      --gateway-address string                 the url of the metrics gateway to publish to (default "http://localhost:6059/metrics")
+      --gateway-key string                     the bearer token to include with gateway requests
+  -h, --help                                   help for parrot
+      --log-level string                       log level. panic|fatal|error|warning|info|debug (default "info")
+      --org-id int                             org id to publish parrot metrics to (default 1)
+      --partition-count int32                  number of partitions to publish parrot metrics to (default 8)
+      --partition-method string                the partition method to use, must be one of bySeries|bySeriesWithTags|bySeriesWithTagsFnv (default "bySeries")
+      --query-interval duration                interval to query to validate metrics (default 10s)
+```
+
+
 ## mt-schemas-explain
 
 ```

publish/kafka/publish.go

@@ -279,12 +279,12 @@ func (m *mtPublisher) Publish(metrics []*schema.MetricData) error {
 			if m.autoInterval {
 				_, s := m.schemas.Match(metric.Name, 0)
 				metric.Interval = s.Retentions.Rets[0].SecondsPerPoint
-				metric.SetId()
 			} else {
 				log.Error("interval is 0 but can't deduce interval automatically. this should never happen")
 				return errors.New("need to deduce interval but cannot")
 			}
 		}
+		metric.SetId()
 
 		isMD := false
 		isMP := false