|
| 1 | +package metrics |
| 2 | + |
| 3 | +import ( |
| 4 | + "context" |
| 5 | + "fmt" |
| 6 | + "github.com/prometheus/common/model" |
| 7 | + "log" |
| 8 | + "regexp" |
| 9 | + "strings" |
| 10 | + "sync" |
| 11 | + "time" |
| 12 | + |
| 13 | + promapi "github.com/prometheus/client_golang/api" |
| 14 | + v1 "github.com/prometheus/client_golang/api/prometheus/v1" |
| 15 | +) |
| 16 | + |
| 17 | +// Struct to represent query with its id |
| 18 | +type queryInfos struct { |
| 19 | + id string |
| 20 | + query string |
| 21 | +} |
| 22 | + |
| 23 | +func queryPrometheus(wg *sync.WaitGroup, queryInfos queryInfos, api v1.API, ctx context.Context, byTerm string) { |
| 24 | + defer wg.Done() |
| 25 | + |
| 26 | + var outputMap map[string]float64 |
| 27 | + result, warnings, err := api.Query(ctx, queryInfos.query, time.Now()) |
| 28 | + if err != nil { |
| 29 | + log.Fatalf("Error with the execution of the query: %v\n", err) |
| 30 | + } |
| 31 | + |
| 32 | + if len(warnings) > 0 { |
| 33 | + log.Printf("Received Advices in the execution of the query: %v\n", warnings) |
| 34 | + } |
| 35 | + |
| 36 | + outputMap = parserOutputResult(result, byTerm) |
| 37 | + fmt.Println(outputMap) |
| 38 | + |
| 39 | + // TODO |
| 40 | + //switch queryInfos.id { |
| 41 | + //case "AvgTotalColdStartsTime": |
| 42 | + // dataToSend.AvgTotalColdStartsTime = outputMap |
| 43 | + // dataFuncToSend.AvgTotalColdStartsTime = outputMap |
| 44 | + //case "AvgFunDurationTime": |
| 45 | + // dataToSend.AvgFunDurationTime = outputMap |
| 46 | + // dataFuncToSend.AvgFunDurationTime = outputMap |
| 47 | + //case "AvgOutputFunSize": |
| 48 | + // dataToSend.AvgOutputFunSize = outputMap |
| 49 | + // dataFuncToSend.AvgOutputFunSize = outputMap |
| 50 | + //case "AvgRemoteFunDurationTime": |
| 51 | + // dataToSend.AvgFunRemoteDurationTime = outputMap |
| 52 | + // dataFuncToSend.AvgFunRemoteDurationTime = outputMap |
| 53 | + //case "AvgRemoteOutputFunSize": |
| 54 | + // dataToSend.AvgOutputFunRemoteSize = outputMap |
| 55 | + // dataFuncToSend.AvgOutputFunRemoteSize = outputMap |
| 56 | + //case "AvgFcRespTime": |
| 57 | + // dataToSend.AvgFcRespTime = outputMap |
| 58 | + //case "AvgFcRemoteRespTime": |
| 59 | + // dataToSend.AvgFcRemoteRespTime = outputMap |
| 60 | + //case "AvgSavingInfosTime": |
| 61 | + // dataToSend.AvgSavingInfosTime = outputMap |
| 62 | + //case "AvgFcTTranferTime": |
| 63 | + // dataToSend.AvgFcTTransferTime = outputMap |
| 64 | + //case "AvgFcTReturnTime": |
| 65 | + // dataToSend.AvgFcTReturnTime = outputMap |
| 66 | + //case "AvgFuncOffloadLatency": |
| 67 | + // dataFuncToSend.AvgFunOffloadLatency = outputMap |
| 68 | + //case "NoChoiceNodeInvocations": |
| 69 | + // dataToSend.NoChoiceNodeInvocations = outputMap |
| 70 | + //case "NoBranchInvocations": |
| 71 | + // dataToSend.NoBranchInvocations = outputMap |
| 72 | + //} |
| 73 | + |
| 74 | +} |
| 75 | + |
| 76 | +func parserOutputResult(execResult model.Value, byTerm string) map[string]float64 { |
| 77 | + functionValues := make(map[string]float64) |
| 78 | + if vector, ok := execResult.(model.Vector); ok { |
| 79 | + for _, sample := range vector { |
| 80 | + if byTerm == "" { |
| 81 | + value := float64(sample.Value) |
| 82 | + functionValues["result"] = value |
| 83 | + } else { |
| 84 | + functionName := string(sample.Metric[model.LabelName(byTerm)]) |
| 85 | + value := float64(sample.Value) |
| 86 | + functionValues[functionName] = value |
| 87 | + } |
| 88 | + |
| 89 | + } |
| 90 | + } else { |
| 91 | + log.Fatalf("Unexpected Result %v\n", execResult) |
| 92 | + } |
| 93 | + |
| 94 | + return functionValues |
| 95 | +} |
| 96 | + |
| 97 | +func parserBy(query string) string { |
| 98 | + re := regexp.MustCompile(`by\s*\(([^)]+)\)`) |
| 99 | + var concatenated string |
| 100 | + matches := re.FindAllStringSubmatch(query, -1) |
| 101 | + if matches != nil { |
| 102 | + uniqueTerms := make(map[string]bool) |
| 103 | + |
| 104 | + for _, match := range matches { |
| 105 | + if len(match) > 1 { |
| 106 | + terms := strings.Split(match[1], ",") |
| 107 | + for _, term := range terms { |
| 108 | + trimmedTerm := strings.TrimSpace(term) |
| 109 | + uniqueTerms[trimmedTerm] = true |
| 110 | + } |
| 111 | + } |
| 112 | + } |
| 113 | + |
| 114 | + var byContents []string |
| 115 | + for term := range uniqueTerms { |
| 116 | + byContents = append(byContents, term) |
| 117 | + } |
| 118 | + |
| 119 | + concatenated = strings.Join(byContents, ", ") |
| 120 | + } else { |
| 121 | + //byTerm not found |
| 122 | + concatenated = "" |
| 123 | + } |
| 124 | + |
| 125 | + return concatenated |
| 126 | +} |
| 127 | + |
| 128 | +func PeriodicalMetricsRetrieveFromPrometheus() { |
| 129 | + // Configuration of the Prometheus client |
| 130 | + client, err := promapi.NewClient(promapi.Config{ |
| 131 | + Address: "http://127.0.0.1:9090", |
| 132 | + }) |
| 133 | + if err != nil { |
| 134 | + log.Fatalf("Error in client creation: %v\n", err) |
| 135 | + } |
| 136 | + |
| 137 | + // API of Prometheus |
| 138 | + api := v1.NewAPI(client) |
| 139 | + ctx := context.Background() |
| 140 | + |
| 141 | + queries := []queryInfos{ |
| 142 | + //{"sum(rate(ColdStart_duration_seconds_sum[1m])) / clamp_min(sum(rate(ColdStart_duration_seconds_count[1m])),1)", "AVG Cold Start Duration [1m]"}, |
| 143 | + {"AvgTotalColdStartsTime", "sum(ColdStart_duration_seconds_sum) by (functColdStartHistogram) / clamp_min(sum(ColdStart_duration_seconds_count) by (functColdStartHistogram), 1)"}, |
| 144 | + {"AvgFunDurationTime", "sum(Function_duration_seconds_sum) by (functInvocationDuration) / sum(Function_duration_seconds_count) by (functInvocationDuration)"}, |
| 145 | + {"AvgOutputFunSize", "sum(FunctionOutput_size_seconds_sum) by (functionSizeHistogram) / sum(FunctionOutput_size_seconds_count) by (functionSizeHistogram)"}, |
| 146 | + {"AvgRemoteFunDurationTime", "sum(Function_RemoteDuration_seconds_sum) by (functInvocationRemoteDuration) / sum(Function_RemoteDuration_seconds_count) by (functInvocationRemoteDuration)"}, |
| 147 | + {"AvgRemoteOutputFunSize", "sum(FunctionOutput_RemoteSize_seconds_sum) by (functionRemoteSizeHistogram) / sum(FunctionOutput_RemoteSize_seconds_count) by (functionRemoteSizeHistogram)"}, |
| 148 | + {"AvgFcRespTime", "sum(FunctionComposition_respTime_seconds_sum) by (functionCompositionInvocationRespTime) / clamp_min(sum(FunctionComposition_respTime_seconds_count) by (functionCompositionInvocationRespTime), 1)"}, |
| 149 | + {"AvgFcRemoteRespTime", "sum(FunctionComposition_remoteRespTime_seconds_sum) by (functionCompositionInvocationRemoteRespTime) / clamp_min(sum(FunctionComposition_remoteRespTime_seconds_count) by (functionCompositionInvocationRemoteRespTime), 1)"}, |
| 150 | + {"AvgSavingInfosTime", "sum(FunctionComposition_SavingInfosDuration_seconds_sum) by (functionCompositionSavingInfoDuration) / clamp_min(sum(FunctionComposition_SavingInfosDuration_seconds_count) by (functionCompositionSavingInfoDuration), 1)"}, |
| 151 | + {"AvgFcTTranferTime", "sum(FunctionComposition_TTransferTime_seconds_sum) by (functionCompositionTTransferTime) / clamp_min(sum(FunctionComposition_TTransferTime_seconds_count) by (functionCompositionTTransferTime), 1)"}, |
| 152 | + {"AvgFcTReturnTime", "sum(FunctionComposition_TReturnTime_seconds_sum) by (functionCompositionTReturnTime) / clamp_min(sum(FunctionComposition_TReturnTime_seconds_count) by (functionCompositionTReturnTime), 1)"}, |
| 153 | + {"AvgFuncOffloadLatency", "sum(Function_OffloadLatency_seconds_sum) by (functionOffloadLatency) / clamp_min(sum(Function_OffloadLatency_seconds_count) by (functionOffloadLatency), 1)"}, |
| 154 | + {"NoChoiceNodeInvocations", "sum by (fcChoiceNodeInvocationCounter) (ChoiceNode_InvocationNo_total)"}, |
| 155 | + {"NoBranchInvocations", "sum by (fcBranchInvocationCounter) (BranchInvocations_total)"}, |
| 156 | + } |
| 157 | + |
| 158 | + ticker := time.NewTicker(1500 * time.Millisecond) |
| 159 | + defer ticker.Stop() |
| 160 | + |
| 161 | + for { |
| 162 | + select { |
| 163 | + case <-ticker.C: |
| 164 | + var wg sync.WaitGroup |
| 165 | + |
| 166 | + for _, query := range queries { |
| 167 | + wg.Add(1) |
| 168 | + byTerm := parserBy(query.query) |
| 169 | + go queryPrometheus(&wg, query, api, ctx, byTerm) |
| 170 | + } |
| 171 | + |
| 172 | + wg.Wait() |
| 173 | + fmt.Println("All queries completed") |
| 174 | + |
| 175 | + } |
| 176 | + } |
| 177 | +} |
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