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tools/heartbeat: support to collect metrics (tikv#8235)
ref tikv#8135 tools/heartbeat: support to collect metrics Signed-off-by: husharp <[email protected]> Co-authored-by: ti-chi-bot[bot] <108142056+ti-chi-bot[bot]@users.noreply.github.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,231 @@ | ||
| // Copyright 2024 TiKV Project Authors. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package metrics | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "math" | ||
| "net/url" | ||
| "strings" | ||
| "time" | ||
|
|
||
| "github.com/pingcap/log" | ||
| "github.com/prometheus/client_golang/api" | ||
| v1 "github.com/prometheus/client_golang/api/prometheus/v1" | ||
| "github.com/prometheus/common/model" | ||
| "go.etcd.io/etcd/pkg/report" | ||
| "go.uber.org/zap" | ||
| ) | ||
|
|
||
| var ( | ||
| prometheusCli api.Client | ||
| finalMetrics2Collect []Metric | ||
| avgRegionStats report.Stats | ||
| avgStoreTime float64 | ||
| collectRound = 1.0 | ||
|
|
||
| metrics2Collect = []Metric{ | ||
| {promSQL: cpuMetric, name: "max cpu usage(%)", max: true}, | ||
| {promSQL: memoryMetric, name: "max memory usage(G)", max: true}, | ||
| {promSQL: goRoutineMetric, name: "max go routines", max: true}, | ||
| {promSQL: hbLatency99Metric, name: "99% Heartbeat Latency(ms)"}, | ||
| {promSQL: hbLatencyAvgMetric, name: "Avg Heartbeat Latency(ms)"}, | ||
| } | ||
|
|
||
| // Prometheus SQL | ||
| cpuMetric = `max_over_time(irate(process_cpu_seconds_total{job=~".*pd.*"}[30s])[1h:30s]) * 100` | ||
| memoryMetric = `max_over_time(go_memstats_heap_inuse_bytes{job=~".*pd.*"}[1h])/1024/1024/1024` | ||
| goRoutineMetric = `max_over_time(go_goroutines{job=~".*pd.*"}[1h])` | ||
| hbLatency99Metric = `histogram_quantile(0.99, sum(rate(pd_scheduler_handle_region_heartbeat_duration_seconds_bucket{}[1m])) by (le))` | ||
| hbLatencyAvgMetric = `sum(rate(pd_scheduler_handle_region_heartbeat_duration_seconds_sum{}[1m])) / sum(rate(pd_scheduler_handle_region_heartbeat_duration_seconds_count{}[1m]))` | ||
|
|
||
| // Heartbeat Performance Duration BreakDown | ||
| breakdownNames = []string{ | ||
| "AsyncHotStatsDuration", | ||
| "CollectRegionStats", | ||
| "Other", | ||
| "PreCheck", | ||
| "RegionGuide", | ||
| "SaveCache_CheckOverlaps", | ||
| "SaveCache_InvalidRegion", | ||
| "SaveCache_SetRegion", | ||
| "SaveCache_UpdateSubTree", | ||
| } | ||
| hbBreakdownMetricByName = func(name string) string { | ||
| return fmt.Sprintf(`sum(rate(pd_core_region_heartbeat_breakdown_handle_duration_seconds_sum{name="%s"}[1m]))`, name) | ||
| } | ||
| ) | ||
|
|
||
| type Metric struct { | ||
| promSQL string | ||
| name string | ||
| value float64 | ||
| // max indicates whether the metric is a max value | ||
| max bool | ||
| } | ||
|
|
||
| func InitMetric2Collect(endpoint string) (withMetric bool) { | ||
| for _, name := range breakdownNames { | ||
| metrics2Collect = append(metrics2Collect, Metric{ | ||
| promSQL: hbBreakdownMetricByName(name), | ||
| name: name, | ||
| }) | ||
| } | ||
| finalMetrics2Collect = metrics2Collect | ||
|
|
||
| if j := strings.Index(endpoint, "//"); j == -1 { | ||
| endpoint = "http://" + endpoint | ||
| } | ||
| cu, err := url.Parse(endpoint) | ||
| if err != nil { | ||
| log.Error("parse prometheus url error", zap.Error(err)) | ||
| return false | ||
| } | ||
| prometheusCli, err = NewPrometheusClient(*cu) | ||
| if err != nil { | ||
| log.Error("create prometheus client error", zap.Error(err)) | ||
| return false | ||
| } | ||
| // check whether the prometheus is available | ||
| _, err = getMetric(prometheusCli, goRoutineMetric, time.Now()) | ||
| if err != nil { | ||
| log.Error("check prometheus availability error, please check the prometheus address", zap.Error(err)) | ||
| return false | ||
| } | ||
| return true | ||
| } | ||
|
|
||
| func NewPrometheusClient(prometheusURL url.URL) (api.Client, error) { | ||
| client, err := api.NewClient(api.Config{ | ||
| Address: prometheusURL.String(), | ||
| }) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return client, nil | ||
| } | ||
|
|
||
| // WarmUpRound wait for the first round to warm up | ||
| const WarmUpRound = 1 | ||
|
|
||
| func CollectMetrics(curRound int, wait time.Duration) { | ||
| if curRound < WarmUpRound { | ||
| return | ||
| } | ||
| // retry 5 times to get average value | ||
| res := make([]struct { | ||
| sum float64 | ||
| count int | ||
| }, len(metrics2Collect)) | ||
| for i := 0; i < 5; i++ { | ||
| for j, m := range metrics2Collect { | ||
| r, err := getMetric(prometheusCli, m.promSQL, time.Now()) | ||
| if err != nil { | ||
| log.Error("get metric error", zap.String("name", m.name), zap.String("prom sql", m.promSQL), zap.Error(err)) | ||
| } else if len(r) > 0 { | ||
| res[j].sum += r[0] | ||
| res[j].count += 1 | ||
| } | ||
| } | ||
| time.Sleep(wait) | ||
| } | ||
| getRes := func(index int) float64 { | ||
| if res[index].count == 0 { | ||
| return 0 | ||
| } | ||
| return res[index].sum / float64(res[index].count) | ||
| } | ||
| for i := 0; i < len(metrics2Collect); i++ { | ||
| metrics2Collect[i].value = getRes(i) | ||
| if metrics2Collect[i].max { | ||
| finalMetrics2Collect[i].value = max(finalMetrics2Collect[i].value, metrics2Collect[i].value) | ||
| } else { | ||
| finalMetrics2Collect[i].value = (finalMetrics2Collect[i].value*collectRound + metrics2Collect[i].value) / (collectRound + 1) | ||
| } | ||
| } | ||
|
|
||
| collectRound += 1 | ||
| log.Info("metrics collected", zap.Float64("round", collectRound), zap.String("metrics", formatMetrics(metrics2Collect))) | ||
| } | ||
|
|
||
| func getMetric(cli api.Client, query string, ts time.Time) ([]float64, error) { | ||
| httpAPI := v1.NewAPI(cli) | ||
| val, _, err := httpAPI.Query(context.Background(), query, ts) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| valMatrix := val.(model.Vector) | ||
| if len(valMatrix) == 0 { | ||
| return nil, nil | ||
| } | ||
| var value []float64 | ||
| for i := range valMatrix { | ||
| value = append(value, float64(valMatrix[i].Value)) | ||
| // judge whether exceeded float maximum value | ||
| if math.IsNaN(value[i]) { | ||
| return nil, fmt.Errorf("prometheus query result exceeded float maximum value, result=%s", valMatrix[i].String()) | ||
| } | ||
| } | ||
| return value, nil | ||
| } | ||
|
|
||
| func formatMetrics(ms []Metric) string { | ||
| res := "" | ||
| for _, m := range ms { | ||
| res += "[" + m.name + "]" + " " + fmt.Sprintf("%.10f", m.value) + " " | ||
| } | ||
| return res | ||
| } | ||
|
|
||
| func CollectRegionAndStoreStats(regionStats *report.Stats, storeTime *float64) { | ||
| if regionStats != nil && storeTime != nil { | ||
| collect(*regionStats, *storeTime) | ||
| } | ||
| } | ||
|
|
||
| func collect(regionStats report.Stats, storeTime float64) { | ||
| average := func(avg, new float64) float64 { | ||
| return (avg*collectRound + new) / (collectRound + 1) | ||
| } | ||
|
|
||
| avgRegionStats.Total = time.Duration(average(float64(avgRegionStats.Total), float64(regionStats.Total))) | ||
| avgRegionStats.Average = average(avgRegionStats.Average, regionStats.Average) | ||
| avgRegionStats.Stddev = average(avgRegionStats.Stddev, regionStats.Stddev) | ||
| avgRegionStats.Fastest = average(avgRegionStats.Fastest, regionStats.Fastest) | ||
| avgRegionStats.Slowest = average(avgRegionStats.Slowest, regionStats.Slowest) | ||
| avgRegionStats.RPS = average(avgRegionStats.RPS, regionStats.RPS) | ||
| avgStoreTime = average(avgStoreTime, storeTime) | ||
| } | ||
|
|
||
| func OutputConclusion() { | ||
| logFields := RegionFields(avgRegionStats, | ||
| zap.Float64("avg store time", avgStoreTime), | ||
| zap.Float64("current round", collectRound), | ||
| zap.String("metrics", formatMetrics(finalMetrics2Collect))) | ||
| log.Info("final metrics collected", logFields...) | ||
| } | ||
|
|
||
| func RegionFields(stats report.Stats, fields ...zap.Field) []zap.Field { | ||
| return append([]zap.Field{ | ||
| zap.String("total", fmt.Sprintf("%.4fs", stats.Total.Seconds())), | ||
| zap.String("slowest", fmt.Sprintf("%.4fs", stats.Slowest)), | ||
| zap.String("fastest", fmt.Sprintf("%.4fs", stats.Fastest)), | ||
| zap.String("average", fmt.Sprintf("%.4fs", stats.Average)), | ||
| zap.String("stddev", fmt.Sprintf("%.4fs", stats.Stddev)), | ||
| zap.String("rps", fmt.Sprintf("%.4f", stats.RPS)), | ||
| }, fields...) | ||
| } |