-
Notifications
You must be signed in to change notification settings - Fork 3.8k
/
recorder.go
874 lines (801 loc) · 30.5 KB
/
recorder.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
// Copyright 2015 The Cockroach Authors.
//
// Use of this software is governed by the Business Source License
// included in the file licenses/BSL.txt.
//
// As of the Change Date specified in that file, in accordance with
// the Business Source License, use of this software will be governed
// by the Apache License, Version 2.0, included in the file
// licenses/APL.txt.
package status
import (
"bytes"
"context"
"encoding/json"
"fmt"
"io"
"math"
"os"
"runtime"
"strconv"
"sync"
"sync/atomic"
"time"
"github.com/cockroachdb/cockroach/pkg/build"
"github.com/cockroachdb/cockroach/pkg/keys"
"github.com/cockroachdb/cockroach/pkg/kv"
"github.com/cockroachdb/cockroach/pkg/kv/kvbase"
"github.com/cockroachdb/cockroach/pkg/kv/kvpb"
"github.com/cockroachdb/cockroach/pkg/kv/kvserver/liveness"
"github.com/cockroachdb/cockroach/pkg/kv/kvserver/liveness/livenesspb"
"github.com/cockroachdb/cockroach/pkg/multitenant"
"github.com/cockroachdb/cockroach/pkg/roachpb"
"github.com/cockroachdb/cockroach/pkg/rpc"
"github.com/cockroachdb/cockroach/pkg/server/status/statuspb"
"github.com/cockroachdb/cockroach/pkg/settings"
"github.com/cockroachdb/cockroach/pkg/settings/cluster"
"github.com/cockroachdb/cockroach/pkg/sql/sem/catconstants"
"github.com/cockroachdb/cockroach/pkg/ts/tspb"
"github.com/cockroachdb/cockroach/pkg/ts/tsutil"
"github.com/cockroachdb/cockroach/pkg/util/cgroups"
"github.com/cockroachdb/cockroach/pkg/util/envutil"
"github.com/cockroachdb/cockroach/pkg/util/hlc"
"github.com/cockroachdb/cockroach/pkg/util/humanizeutil"
"github.com/cockroachdb/cockroach/pkg/util/log"
// Import the logmetrics package to trigger its own init function, which inits and injects
// metrics functionality into pkg/util/log.
_ "github.com/cockroachdb/cockroach/pkg/util/log/logmetrics"
"github.com/cockroachdb/cockroach/pkg/util/metric"
"github.com/cockroachdb/cockroach/pkg/util/syncutil"
"github.com/cockroachdb/cockroach/pkg/util/system"
"github.com/cockroachdb/errors"
"github.com/cockroachdb/redact"
"github.com/dustin/go-humanize"
"github.com/elastic/gosigar"
prometheusgo "github.com/prometheus/client_model/go"
"github.com/prometheus/common/expfmt"
)
const (
// storeTimeSeriesPrefix is the common prefix for time series keys which
// record store-specific data.
storeTimeSeriesPrefix = "cr.store.%s"
// nodeTimeSeriesPrefix is the common prefix for time series keys which
// record node-specific data.
nodeTimeSeriesPrefix = "cr.node.%s"
advertiseAddrLabelKey = "advertise-addr"
httpAddrLabelKey = "http-addr"
sqlAddrLabelKey = "sql-addr"
disableNodeAndTenantLabelsEnvVar = "COCKROACH_DISABLE_NODE_AND_TENANT_METRIC_LABELS"
)
// This option is provided as an escape hatch for customers who have
// custom scrape logic that adds relevant labels already.
var disableNodeAndTenantLabels = envutil.EnvOrDefaultBool(disableNodeAndTenantLabelsEnvVar, false)
// storeMetrics is the minimum interface of the storage.Store object needed by
// MetricsRecorder to provide status summaries. This is used instead of Store
// directly in order to simplify testing.
type storeMetrics interface {
StoreID() roachpb.StoreID
Descriptor(context.Context, bool) (*roachpb.StoreDescriptor, error)
Registry() *metric.Registry
}
// ChildMetricsEnabled enables exporting of additional prometheus time series with extra labels
var ChildMetricsEnabled = settings.RegisterBoolSetting(
settings.ApplicationLevel, "server.child_metrics.enabled",
"enables the exporting of child metrics, additional prometheus time series with extra labels",
false,
settings.WithPublic)
// MetricsRecorder is used to periodically record the information in a number of
// metric registries.
//
// Two types of registries are maintained: "node-level" registries, provided by
// node-level systems, and "store-level" registries which are provided by each
// store hosted by the node. There are slight differences in the way these are
// recorded, and they are thus kept separate.
type MetricsRecorder struct {
*HealthChecker
nodeLiveness *liveness.NodeLiveness
remoteClocks *rpc.RemoteClockMonitor
settings *cluster.Settings
clock hlc.WallClock
// Counts to help optimize slice allocation. Should only be accessed atomically.
lastDataCount int64
lastSummaryCount int64
lastNodeMetricCount int64
lastStoreMetricCount int64
// tenantID is the tenantID of the tenant this recorder is attached to.
tenantID roachpb.TenantID
// tenantNameContainer holds the tenant name of the tenant this recorder
// is attached to. It will be used to label metrics that are tenant-specific.
tenantNameContainer *roachpb.TenantNameContainer
// prometheusExporter merges metrics into families and generates the
// prometheus text format. It has a ScrapeAndPrintAsText method for thread safe
// scrape and print so there is no need to have additional lock here.
prometheusExporter metric.PrometheusExporter
// mu synchronizes the reading of node/store registries against the adding of
// nodes/stores. Consequently, almost all uses of it only need to take an
// RLock on it.
mu struct {
syncutil.RWMutex
sync.Once
// nodeRegistry holds metrics that are specific to the storage and KV layer.
// Do not use this for metrics that could possibly be reported by secondary
// tenants, i.e. those also registered in server/tenant.go per tenant server.
nodeRegistry *metric.Registry
// appRegistry holds application-level metrics. These are the metrics
// that are also registered in tenant.go anew for each tenant.
appRegistry *metric.Registry
// sysRegistry holds process-level metrics. These are metrics
// that are collected once per process and are not specific to
// any particular tenant.
sysRegistry *metric.Registry
// logRegistry contains the global metrics registry used by the logging
// package. NB: The underlying metrics are global, but each server gets
// its own separate registry to avoid things such as colliding labels.
logRegistry *metric.Registry
desc roachpb.NodeDescriptor
startedAt int64
// storeRegistries contains a registry for each store on the node. These
// are not stored as subregistries, but rather are treated as wholly
// independent.
storeRegistries map[roachpb.StoreID]*metric.Registry
stores map[roachpb.StoreID]storeMetrics
// tenantRegistries contains the registries for shared-process tenants.
tenantRegistries map[roachpb.TenantID]*metric.Registry
}
// WriteNodeStatus is a potentially long-running method (with a network
// round-trip) that requires a mutex to be safe for concurrent usage. We
// therefore give it its own mutex to avoid blocking other methods.
writeSummaryMu syncutil.Mutex
}
// NewMetricsRecorder initializes a new MetricsRecorder object that uses the
// given clock.
//
// If both nodeLiveness and remoteClocks are not-nil, the node status generated
// by GenerateNodeStatus() will contain info about RPC lantency to all currently
// live nodes.
func NewMetricsRecorder(
tenantID roachpb.TenantID,
tenantNameContainer *roachpb.TenantNameContainer,
nodeLiveness *liveness.NodeLiveness,
remoteClocks *rpc.RemoteClockMonitor,
clock hlc.WallClock,
settings *cluster.Settings,
) *MetricsRecorder {
mr := &MetricsRecorder{
HealthChecker: NewHealthChecker(trackedMetrics),
nodeLiveness: nodeLiveness,
remoteClocks: remoteClocks,
settings: settings,
clock: clock,
tenantID: tenantID,
tenantNameContainer: tenantNameContainer,
prometheusExporter: metric.MakePrometheusExporter(),
}
mr.mu.storeRegistries = make(map[roachpb.StoreID]*metric.Registry)
mr.mu.stores = make(map[roachpb.StoreID]storeMetrics)
mr.mu.tenantRegistries = make(map[roachpb.TenantID]*metric.Registry)
return mr
}
// AddTenantRegistry adds shared-process tenant's registry.
func (mr *MetricsRecorder) AddTenantRegistry(tenantID roachpb.TenantID, rec *metric.Registry) {
mr.mu.Lock()
defer mr.mu.Unlock()
if !disableNodeAndTenantLabels {
// If there are no in-process tenants running, we don't set the
// tenant label on the system tenant metrics until a secondary
// tenant is initialized.
mr.mu.Do(func() {
mr.mu.nodeRegistry.AddLabel("tenant", catconstants.SystemTenantName)
mr.mu.appRegistry.AddLabel("tenant", catconstants.SystemTenantName)
mr.mu.logRegistry.AddLabel("tenant", catconstants.SystemTenantName)
mr.mu.sysRegistry.AddLabel("tenant", catconstants.SystemTenantName)
})
}
mr.mu.tenantRegistries[tenantID] = rec
}
// RemoveTenantRegistry removes shared-process tenant's registry.
func (mr *MetricsRecorder) RemoveTenantRegistry(tenantID roachpb.TenantID) {
mr.mu.Lock()
defer mr.mu.Unlock()
delete(mr.mu.tenantRegistries, tenantID)
}
// AppRegistry returns the metric registry for application-level metrics.
func (mr *MetricsRecorder) AppRegistry() *metric.Registry {
mr.mu.Lock()
defer mr.mu.Unlock()
return mr.mu.appRegistry
}
// AddNode adds various metric registries an initialized server, along
// with its descriptor and start time.
// The registries are:
//
// - node registry - storage/KV metrics relating to a KV node.
// - app registry - application-level metrics relating to a SQL/HTTP service.
// - log registry - metrics from the logging system.
// - sys registry - metrics about system-wide properties.
func (mr *MetricsRecorder) AddNode(
nodeReg, appReg, logReg, sysReg *metric.Registry,
desc roachpb.NodeDescriptor,
startedAt int64,
advertiseAddr, httpAddr, sqlAddr string,
) {
mr.mu.Lock()
defer mr.mu.Unlock()
mr.mu.nodeRegistry = nodeReg
mr.mu.appRegistry = appReg
mr.mu.logRegistry = logReg
mr.mu.sysRegistry = sysReg
mr.mu.desc = desc
mr.mu.startedAt = startedAt
// Create node ID gauge metric with host as a label.
metadata := metric.Metadata{
Name: "node-id",
Help: "node ID with labels for advertised RPC and HTTP addresses",
Measurement: "Node ID",
Unit: metric.Unit_CONST,
}
metadata.AddLabel(advertiseAddrLabelKey, advertiseAddr)
metadata.AddLabel(httpAddrLabelKey, httpAddr)
metadata.AddLabel(sqlAddrLabelKey, sqlAddr)
nodeIDGauge := metric.NewGauge(metadata)
nodeIDGauge.Update(int64(desc.NodeID))
nodeReg.AddMetric(nodeIDGauge)
if !disableNodeAndTenantLabels {
nodeIDInt := int(desc.NodeID)
if nodeIDInt != 0 {
nodeReg.AddLabel("node_id", strconv.Itoa(int(desc.NodeID)))
sysReg.AddLabel("node_id", strconv.Itoa(int(desc.NodeID)))
appReg.AddLabel("node_id", strconv.Itoa(int(desc.NodeID)))
logReg.AddLabel("node_id", strconv.Itoa(int(desc.NodeID)))
for _, s := range mr.mu.storeRegistries {
s.AddLabel("node_id", strconv.Itoa(int(desc.NodeID)))
}
}
if mr.tenantNameContainer != nil && mr.tenantNameContainer.String() != catconstants.SystemTenantName {
nodeReg.AddLabel("tenant", mr.tenantNameContainer)
sysReg.AddLabel("tenant", mr.tenantNameContainer)
appReg.AddLabel("tenant", mr.tenantNameContainer)
logReg.AddLabel("tenant", mr.tenantNameContainer)
}
}
}
// AddStore adds the Registry from the provided store as a store-level registry
// in this recorder. A reference to the store is kept for the purpose of
// gathering some additional information which is present in store status
// summaries.
// Stores should only be added to the registry after they have been started.
func (mr *MetricsRecorder) AddStore(store storeMetrics) {
mr.mu.Lock()
defer mr.mu.Unlock()
storeID := store.StoreID()
store.Registry().AddLabel("store", strconv.Itoa(int(storeID)))
mr.mu.storeRegistries[storeID] = store.Registry()
mr.mu.stores[storeID] = store
}
// MarshalJSON returns an appropriate JSON representation of the current values
// of the metrics being tracked by this recorder.
func (mr *MetricsRecorder) MarshalJSON() ([]byte, error) {
mr.mu.RLock()
defer mr.mu.RUnlock()
if mr.mu.nodeRegistry == nil {
// We haven't yet processed initialization information; return an empty
// JSON object.
if log.V(1) {
log.Warning(context.TODO(), "MetricsRecorder.MarshalJSON() called before NodeID allocation")
}
return []byte("{}"), nil
}
topLevel := map[string]interface{}{
fmt.Sprintf("node.%d", mr.mu.desc.NodeID): mr.mu.nodeRegistry,
fmt.Sprintf("node.%d.log", mr.mu.desc.NodeID): mr.mu.logRegistry,
}
// Add collection of stores to top level. JSON requires that keys be strings,
// so we must convert the store ID to a string.
storeLevel := make(map[string]interface{})
for id, reg := range mr.mu.storeRegistries {
storeLevel[strconv.Itoa(int(id))] = reg
}
topLevel["stores"] = storeLevel
return json.Marshal(topLevel)
}
// ScrapeIntoPrometheus updates the passed-in prometheusExporter's metrics
// snapshot.
func (mr *MetricsRecorder) ScrapeIntoPrometheus(pm *metric.PrometheusExporter) {
mr.mu.RLock()
defer mr.mu.RUnlock()
if mr.mu.nodeRegistry == nil {
// We haven't yet processed initialization information; output nothing.
if log.V(1) {
log.Warning(context.TODO(), "MetricsRecorder asked to scrape metrics before NodeID allocation")
}
}
includeChildMetrics := ChildMetricsEnabled.Get(&mr.settings.SV)
pm.ScrapeRegistry(mr.mu.nodeRegistry, includeChildMetrics)
pm.ScrapeRegistry(mr.mu.appRegistry, includeChildMetrics)
pm.ScrapeRegistry(mr.mu.logRegistry, includeChildMetrics)
pm.ScrapeRegistry(mr.mu.sysRegistry, includeChildMetrics)
for _, reg := range mr.mu.storeRegistries {
pm.ScrapeRegistry(reg, includeChildMetrics)
}
for _, tenantRegistry := range mr.mu.tenantRegistries {
pm.ScrapeRegistry(tenantRegistry, includeChildMetrics)
}
}
// PrintAsText writes the current metrics values as plain-text to the writer.
// We write metrics to a temporary buffer which is then copied to the writer.
// This is to avoid hanging requests from holding the lock.
func (mr *MetricsRecorder) PrintAsText(w io.Writer, contentType expfmt.Format) error {
var buf bytes.Buffer
if err := mr.prometheusExporter.ScrapeAndPrintAsText(&buf, contentType, mr.ScrapeIntoPrometheus); err != nil {
return err
}
_, err := buf.WriteTo(w)
return err
}
// ExportToGraphite sends the current metric values to a Graphite server.
// It creates a new PrometheusExporter each time to avoid needing to worry
// about races with mr.promMu.prometheusExporter. We are not as worried
// about the extra memory allocations.
func (mr *MetricsRecorder) ExportToGraphite(
ctx context.Context, endpoint string, pm *metric.PrometheusExporter,
) error {
mr.ScrapeIntoPrometheus(pm)
graphiteExporter := metric.MakeGraphiteExporter(pm)
return graphiteExporter.Push(ctx, endpoint)
}
// GetTimeSeriesData serializes registered metrics for consumption by
// CockroachDB's time series system. GetTimeSeriesData implements the DataSource
// interface of the ts package.
func (mr *MetricsRecorder) GetTimeSeriesData() []tspb.TimeSeriesData {
mr.mu.RLock()
defer mr.mu.RUnlock()
if mr.mu.nodeRegistry == nil {
// We haven't yet processed initialization information; do nothing.
if log.V(1) {
log.Warning(context.TODO(), "MetricsRecorder.GetTimeSeriesData() called before NodeID allocation")
}
return nil
}
lastDataCount := atomic.LoadInt64(&mr.lastDataCount)
data := make([]tspb.TimeSeriesData, 0, lastDataCount)
// Record time series from node-level registries.
now := mr.clock.Now()
recorder := registryRecorder{
registry: mr.mu.nodeRegistry,
format: nodeTimeSeriesPrefix,
source: mr.mu.desc.NodeID.String(),
timestampNanos: now.UnixNano(),
}
recorder.record(&data)
// Now record the app metrics for the system tenant.
recorder.registry = mr.mu.appRegistry
recorder.record(&data)
// Now record the log metrics.
recorder.registry = mr.mu.logRegistry
recorder.record(&data)
// Now record the system metrics.
recorder.registry = mr.mu.sysRegistry
recorder.record(&data)
// Record time series from app-level registries for secondary tenants.
for tenantID, r := range mr.mu.tenantRegistries {
tenantRecorder := registryRecorder{
registry: r,
format: nodeTimeSeriesPrefix,
source: tsutil.MakeTenantSource(mr.mu.desc.NodeID.String(), tenantID.String()),
timestampNanos: now.UnixNano(),
}
tenantRecorder.record(&data)
}
// Record time series from store-level registries.
tIDLabel := multitenant.TenantIDLabel
for storeID, r := range mr.mu.storeRegistries {
storeRecorder := registryRecorder{
registry: r,
format: storeTimeSeriesPrefix,
source: storeID.String(),
timestampNanos: now.UnixNano(),
}
storeRecorder.record(&data)
// Now record secondary tenant store metrics, if any exist in the process.
for tenantID := range mr.mu.tenantRegistries {
tenantStoreRecorder := registryRecorder{
registry: r,
format: storeTimeSeriesPrefix,
source: tsutil.MakeTenantSource(storeID.String(), tenantID.String()),
timestampNanos: now.UnixNano(),
}
tenantID := tenantID.String()
tenantStoreRecorder.recordChild(&data, kvbase.TenantsStorageMetricsSet, &prometheusgo.LabelPair{
Name: &tIDLabel,
Value: &tenantID,
})
}
}
atomic.CompareAndSwapInt64(&mr.lastDataCount, lastDataCount, int64(len(data)))
return data
}
// GetMetricsMetadata returns the metadata from all metrics tracked in the node's
// nodeRegistry and a randomly selected storeRegistry.
//
// If the argument is true, both node-level and app-level metrics are
// combined in the first return value.
//
// The third return value combines all process-wide metrics (log and
// system metrics).
func (mr *MetricsRecorder) GetMetricsMetadata(
combined bool,
) (nodeMetrics, appMetrics, srvMetrics map[string]metric.Metadata) {
mr.mu.Lock()
defer mr.mu.Unlock()
if mr.mu.nodeRegistry == nil {
// We haven't yet processed initialization information; do nothing.
if log.V(1) {
log.Warning(context.TODO(), "MetricsRecorder.GetMetricsMetadata() called before NodeID allocation")
}
return nil, nil, nil
}
nodeMetrics = make(map[string]metric.Metadata)
if combined {
appMetrics = nodeMetrics
srvMetrics = nodeMetrics
} else {
appMetrics = make(map[string]metric.Metadata)
srvMetrics = make(map[string]metric.Metadata)
}
mr.mu.nodeRegistry.WriteMetricsMetadata(nodeMetrics)
mr.mu.appRegistry.WriteMetricsMetadata(appMetrics)
mr.mu.logRegistry.WriteMetricsMetadata(srvMetrics)
mr.mu.sysRegistry.WriteMetricsMetadata(srvMetrics)
// Get a random storeID.
var sID roachpb.StoreID
storeFound := false
for storeID := range mr.mu.storeRegistries {
sID = storeID
storeFound = true
break
}
// Get metric metadata from that store because all stores have the same metadata.
if storeFound {
mr.mu.storeRegistries[sID].WriteMetricsMetadata(nodeMetrics)
}
return nodeMetrics, appMetrics, srvMetrics
}
// getNetworkActivity produces a map of network activity from this node to all
// other nodes. Latencies are stored as nanos.
func (mr *MetricsRecorder) getNetworkActivity(
ctx context.Context,
) map[roachpb.NodeID]statuspb.NodeStatus_NetworkActivity {
activity := make(map[roachpb.NodeID]statuspb.NodeStatus_NetworkActivity)
if mr.nodeLiveness != nil {
var currentAverages map[roachpb.NodeID]time.Duration
if mr.remoteClocks != nil {
currentAverages = mr.remoteClocks.AllLatencies()
}
for nodeID, entry := range mr.nodeLiveness.ScanNodeVitalityFromCache() {
na := statuspb.NodeStatus_NetworkActivity{}
if entry.IsLive(livenesspb.NetworkMap) {
if latency, ok := currentAverages[nodeID]; ok {
na.Latency = latency.Nanoseconds()
}
}
activity[nodeID] = na
}
}
return activity
}
// GenerateNodeStatus returns a status summary message for the node. The summary
// includes the recent values of metrics for both the node and all of its
// component stores. When the node isn't initialized yet, nil is returned.
func (mr *MetricsRecorder) GenerateNodeStatus(ctx context.Context) *statuspb.NodeStatus {
activity := mr.getNetworkActivity(ctx)
mr.mu.RLock()
defer mr.mu.RUnlock()
if mr.mu.nodeRegistry == nil {
// We haven't yet processed initialization information; do nothing.
if log.V(1) {
log.Warning(ctx, "attempt to generate status summary before NodeID allocation.")
}
return nil
}
now := mr.clock.Now()
lastSummaryCount := atomic.LoadInt64(&mr.lastSummaryCount)
lastNodeMetricCount := atomic.LoadInt64(&mr.lastNodeMetricCount)
lastStoreMetricCount := atomic.LoadInt64(&mr.lastStoreMetricCount)
systemMemory, _, err := GetTotalMemoryWithoutLogging()
if err != nil {
log.Errorf(ctx, "could not get total system memory: %v", err)
}
// Generate a node status with no store data.
nodeStat := &statuspb.NodeStatus{
Desc: mr.mu.desc,
BuildInfo: build.GetInfo(),
UpdatedAt: now.UnixNano(),
StartedAt: mr.mu.startedAt,
StoreStatuses: make([]statuspb.StoreStatus, 0, lastSummaryCount),
Metrics: make(map[string]float64, lastNodeMetricCount),
Args: os.Args,
Env: flattenStrings(envutil.GetEnvVarsUsed()),
Activity: activity,
NumCpus: int32(system.NumCPU()),
TotalSystemMemory: systemMemory,
}
eachRecordableValue(mr.mu.nodeRegistry, func(name string, val float64) {
nodeStat.Metrics[name] = val
})
eachRecordableValue(mr.mu.appRegistry, func(name string, val float64) {
nodeStat.Metrics[name] = val
})
eachRecordableValue(mr.mu.logRegistry, func(name string, val float64) {
nodeStat.Metrics[name] = val
})
eachRecordableValue(mr.mu.sysRegistry, func(name string, val float64) {
nodeStat.Metrics[name] = val
})
// Generate status summaries for stores.
for storeID, r := range mr.mu.storeRegistries {
storeMetrics := make(map[string]float64, lastStoreMetricCount)
eachRecordableValue(r, func(name string, val float64) {
storeMetrics[name] = val
})
// Gather descriptor from store.
descriptor, err := mr.mu.stores[storeID].Descriptor(ctx, false /* useCached */)
if err != nil {
log.Errorf(ctx, "could not record status summaries: Store %d could not return descriptor, error: %s", storeID, err)
continue
}
nodeStat.StoreStatuses = append(nodeStat.StoreStatuses, statuspb.StoreStatus{
Desc: *descriptor,
Metrics: storeMetrics,
})
}
atomic.CompareAndSwapInt64(
&mr.lastSummaryCount, lastSummaryCount, int64(len(nodeStat.StoreStatuses)))
atomic.CompareAndSwapInt64(
&mr.lastNodeMetricCount, lastNodeMetricCount, int64(len(nodeStat.Metrics)))
if len(nodeStat.StoreStatuses) > 0 {
atomic.CompareAndSwapInt64(
&mr.lastStoreMetricCount, lastStoreMetricCount, int64(len(nodeStat.StoreStatuses[0].Metrics)))
}
return nodeStat
}
func flattenStrings(s []redact.RedactableString) []string {
res := make([]string, len(s))
for i, v := range s {
res[i] = v.StripMarkers()
}
return res
}
// WriteNodeStatus writes the supplied summary to the given client. If mustExist
// is true, the key must already exist and must not change while being updated,
// otherwise an error is returned -- if false, the status is always written.
func (mr *MetricsRecorder) WriteNodeStatus(
ctx context.Context, db *kv.DB, nodeStatus statuspb.NodeStatus, mustExist bool,
) error {
mr.writeSummaryMu.Lock()
defer mr.writeSummaryMu.Unlock()
key := keys.NodeStatusKey(nodeStatus.Desc.NodeID)
// We use an inline value to store only a single version of the node status.
// There's not much point in keeping the historical versions as we keep
// all of the constituent data as timeseries. Further, due to the size
// of the build info in the node status, writing one of these every 10s
// will generate more versions than will easily fit into a range over
// the course of a day.
if mustExist {
entry, err := db.Get(ctx, key)
if err != nil {
return err
}
if entry.Value == nil {
return errors.New("status entry not found, node may have been decommissioned")
}
err = db.CPutInline(ctx, key, &nodeStatus, entry.Value.TagAndDataBytes())
if detail := (*kvpb.ConditionFailedError)(nil); errors.As(err, &detail) {
if detail.ActualValue == nil {
return errors.New("status entry not found, node may have been decommissioned")
}
return errors.New("status entry unexpectedly changed during update")
} else if err != nil {
return err
}
} else {
if err := db.PutInline(ctx, key, &nodeStatus); err != nil {
return err
}
}
if log.V(2) {
statusJSON, err := json.Marshal(&nodeStatus)
if err != nil {
log.Errorf(ctx, "error marshaling nodeStatus to json: %s", err)
}
log.Infof(ctx, "node %d status: %s", nodeStatus.Desc.NodeID, statusJSON)
}
return nil
}
// registryRecorder is a helper class for recording time series datapoints
// from a metrics Registry.
type registryRecorder struct {
registry *metric.Registry
format string
source string
timestampNanos int64
}
// extractValue extracts the metric value(s) for the given metric and passes it, along with the metric name, to the
// provided callback function.
func extractValue(name string, mtr interface{}, fn func(string, float64)) error {
switch mtr := mtr.(type) {
case metric.WindowedHistogram:
// Use cumulative stats here. Count and Sum must be calculated against the cumulative histogram.
cumulative, ok := mtr.(metric.CumulativeHistogram)
if !ok {
return errors.Newf(`extractValue called on histogram metric %q that does not implement the
CumulativeHistogram interface. All histogram metrics are expected to implement this interface`, name)
}
count, sum := cumulative.CumulativeSnapshot().Total()
fn(name+"-count", float64(count))
fn(name+"-sum", sum)
// Use windowed stats for avg and quantiles
windowedSnapshot := mtr.WindowedSnapshot()
avg := windowedSnapshot.Mean()
if math.IsNaN(avg) || math.IsInf(avg, +1) || math.IsInf(avg, -1) {
avg = 0
}
fn(name+"-avg", avg)
for _, pt := range metric.RecordHistogramQuantiles {
fn(name+pt.Suffix, windowedSnapshot.ValueAtQuantile(pt.Quantile))
}
case metric.PrometheusExportable:
// NB: this branch is intentionally at the bottom since all metrics implement it.
m := mtr.ToPrometheusMetric()
if m.Gauge != nil {
fn(name, *m.Gauge.Value)
} else if m.Counter != nil {
fn(name, *m.Counter.Value)
}
default:
return errors.Errorf("cannot extract value for type %T", mtr)
}
return nil
}
// eachRecordableValue visits each metric in the registry, calling the supplied
// function once for each recordable value represented by that metric. This is
// useful to expand certain metric types (such as histograms) into multiple
// recordable values.
func eachRecordableValue(reg *metric.Registry, fn func(string, float64)) {
reg.Each(func(name string, mtr interface{}) {
if err := extractValue(name, mtr, fn); err != nil {
log.Warningf(context.TODO(), "%v", err)
return
}
})
}
func (rr registryRecorder) record(dest *[]tspb.TimeSeriesData) {
eachRecordableValue(rr.registry, func(name string, val float64) {
*dest = append(*dest, tspb.TimeSeriesData{
Name: fmt.Sprintf(rr.format, name),
Source: rr.source,
Datapoints: []tspb.TimeSeriesDatapoint{
{
TimestampNanos: rr.timestampNanos,
Value: val,
},
},
})
})
}
// recordChild filters the metrics in the registry down to those provided in
// the metricsFilter argument, and iterates through any child metrics that
// may exist on said metric. Child metrics whose label sets contains a match
// against the childLabelFilter are recorded into the provided dest slice of
// type tspb.TimeSeriesData.
//
// NB: Only available for Counter and Gauge metrics.
func (rr registryRecorder) recordChild(
dest *[]tspb.TimeSeriesData,
metricsFilter map[string]struct{},
childLabelFilter *prometheusgo.LabelPair,
) {
labels := rr.registry.GetLabels()
rr.registry.Select(metricsFilter, func(name string, v interface{}) {
prom, ok := v.(metric.PrometheusExportable)
if !ok {
return
}
promIter, ok := v.(metric.PrometheusIterable)
if !ok {
return
}
m := prom.ToPrometheusMetric()
m.Label = append(labels, prom.GetLabels()...)
processChildMetric := func(metric *prometheusgo.Metric) {
found := false
for _, label := range metric.Label {
if label.GetName() == childLabelFilter.GetName() &&
label.GetValue() == childLabelFilter.GetValue() {
found = true
break
}
}
if !found {
return
}
var value float64
if metric.Gauge != nil {
value = *metric.Gauge.Value
} else if metric.Counter != nil {
value = *metric.Counter.Value
} else {
return
}
*dest = append(*dest, tspb.TimeSeriesData{
Name: fmt.Sprintf(rr.format, prom.GetName()),
Source: rr.source,
Datapoints: []tspb.TimeSeriesDatapoint{
{
TimestampNanos: rr.timestampNanos,
Value: value,
},
},
})
}
promIter.Each(m.Label, processChildMetric)
})
}
// GetTotalMemory returns either the total system memory (in bytes) or if
// possible the cgroups available memory.
func GetTotalMemory(ctx context.Context) (int64, error) {
memory, warning, err := GetTotalMemoryWithoutLogging()
if err != nil {
return 0, err
}
if warning != "" {
log.Infof(ctx, "%s", warning)
}
return memory, nil
}
// GetTotalMemoryWithoutLogging is the same as GetTotalMemory, but returns any warning
// as a string instead of logging it.
func GetTotalMemoryWithoutLogging() (int64, string, error) {
totalMem, err := func() (int64, error) {
mem := gosigar.Mem{}
if err := mem.Get(); err != nil {
return 0, err
}
if mem.Total > math.MaxInt64 {
return 0, fmt.Errorf("inferred memory size %s exceeds maximum supported memory size %s",
humanize.IBytes(mem.Total), humanize.Bytes(math.MaxInt64))
}
return int64(mem.Total), nil
}()
if err != nil {
return 0, "", err
}
checkTotal := func(x int64, warning string) (int64, string, error) {
if x <= 0 {
// https://github.com/elastic/gosigar/issues/72
return 0, warning, fmt.Errorf("inferred memory size %d is suspicious, considering invalid", x)
}
return x, warning, nil
}
if runtime.GOOS != "linux" {
return checkTotal(totalMem, "")
}
cgAvlMem, warning, err := cgroups.GetMemoryLimit()
if err != nil {
return checkTotal(totalMem,
fmt.Sprintf("available memory from cgroups is unsupported, using system memory %s instead: %v",
humanizeutil.IBytes(totalMem), err))
}
// Let's special case unlimited memory from cgroups to get a more accurate error message.
// When memory limit isn't set, cgroups returns 2^63-1 rounded to page size multiple (i.e., 4096).
if cgAvlMem == 0x7FFFFFFFFFFFF000 {
return checkTotal(totalMem,
fmt.Sprintf("available memory from cgroups (%s) is unlimited ('systemd' without MemoryMax?), using system memory %s instead: %s",
humanize.IBytes(uint64(cgAvlMem)), humanizeutil.IBytes(totalMem), warning))
}
if cgAvlMem == 0 || (totalMem > 0 && cgAvlMem > totalMem) {
return checkTotal(totalMem,
fmt.Sprintf("available memory from cgroups (%s) is unsupported, using system memory %s instead: %s",
humanize.IBytes(uint64(cgAvlMem)), humanizeutil.IBytes(totalMem), warning))
}
return checkTotal(cgAvlMem, "")
}