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| 1 | +// Licensed to Elasticsearch B.V. under one or more contributor |
| 2 | +// license agreements. See the NOTICE file distributed with |
| 3 | +// this work for additional information regarding copyright |
| 4 | +// ownership. Elasticsearch B.V. licenses this file to you under |
| 5 | +// the Apache License, Version 2.0 (the "License"); you may |
| 6 | +// not use this file except in compliance with the License. |
| 7 | +// You may obtain a copy of the License at |
| 8 | +// |
| 9 | +// http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | +// |
| 11 | +// Unless required by applicable law or agreed to in writing, |
| 12 | +// software distributed under the License is distributed on an |
| 13 | +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| 14 | +// KIND, either express or implied. See the License for the |
| 15 | +// specific language governing permissions and limitations |
| 16 | +// under the License. |
| 17 | + |
| 18 | +package client |
| 19 | + |
| 20 | +import ( |
| 21 | + "context" |
| 22 | + "fmt" |
| 23 | + "strings" |
| 24 | + |
| 25 | + "github.com/vmware/govmomi/performance" |
| 26 | + "github.com/vmware/govmomi/vim25/types" |
| 27 | + |
| 28 | + "github.com/elastic/elastic-agent-libs/logp" |
| 29 | +) |
| 30 | + |
| 31 | +type PerfManager interface { |
| 32 | + AvailableMetric(ctx context.Context, entity types.ManagedObjectReference, interval int32) (performance.MetricList, error) |
| 33 | + Query(ctx context.Context, spec []types.PerfQuerySpec) ([]types.BasePerfEntityMetricBase, error) |
| 34 | + ToMetricSeries(ctx context.Context, series []types.BasePerfEntityMetricBase) ([]performance.EntityMetric, error) |
| 35 | +} |
| 36 | + |
| 37 | +type PerformanceDataFetcher struct { |
| 38 | + perfManager PerfManager |
| 39 | + logger *logp.Logger |
| 40 | +} |
| 41 | + |
| 42 | +func NewPerformanceDataFetcher(logger *logp.Logger, perfManager PerfManager) *PerformanceDataFetcher { |
| 43 | + return &PerformanceDataFetcher{ |
| 44 | + logger: logger, |
| 45 | + perfManager: perfManager, |
| 46 | + } |
| 47 | +} |
| 48 | + |
| 49 | +func (p *PerformanceDataFetcher) GetPerfMetrics(ctx context.Context, |
| 50 | + period int32, |
| 51 | + objectType string, |
| 52 | + objectName string, |
| 53 | + objectReference types.ManagedObjectReference, |
| 54 | + metrics map[string]*types.PerfCounterInfo, |
| 55 | + metricSet map[string]struct{}) (metricMap map[string]interface{}, err error) { |
| 56 | + |
| 57 | + metricMap = make(map[string]interface{}) |
| 58 | + |
| 59 | + availableMetric, err := p.perfManager.AvailableMetric(ctx, objectReference, period) |
| 60 | + if err != nil { |
| 61 | + return nil, fmt.Errorf("failed to get available metrics: %w", err) |
| 62 | + } |
| 63 | + |
| 64 | + availableMetricByKey := availableMetric.ByKey() |
| 65 | + |
| 66 | + // Filter for required metrics |
| 67 | + var metricIDs []types.PerfMetricId |
| 68 | + for key, metric := range metricSet { |
| 69 | + if counter, ok := metrics[key]; ok { |
| 70 | + if _, exists := availableMetricByKey[counter.Key]; exists { |
| 71 | + metricIDs = append(metricIDs, types.PerfMetricId{ |
| 72 | + CounterId: counter.Key, |
| 73 | + Instance: "*", |
| 74 | + }) |
| 75 | + } |
| 76 | + } else { |
| 77 | + p.logger.Warnf("Metric %s not found", metric) |
| 78 | + } |
| 79 | + } |
| 80 | + |
| 81 | + spec := types.PerfQuerySpec{ |
| 82 | + Entity: objectReference, |
| 83 | + MetricId: metricIDs, |
| 84 | + MaxSample: 1, |
| 85 | + IntervalId: period, |
| 86 | + } |
| 87 | + |
| 88 | + // Query performance data |
| 89 | + samples, err := p.perfManager.Query(ctx, []types.PerfQuerySpec{spec}) |
| 90 | + if err != nil { |
| 91 | + if strings.Contains(err.Error(), "ServerFaultCode: A specified parameter was not correct: querySpec.interval") { |
| 92 | + return metricMap, fmt.Errorf("failed to query performance data: use one of the system's supported interval. consider adjusting period: %w", err) |
| 93 | + } |
| 94 | + |
| 95 | + return metricMap, fmt.Errorf("failed to query performance data: %w", err) |
| 96 | + } |
| 97 | + |
| 98 | + if len(samples) == 0 { |
| 99 | + p.logger.Debug("No samples returned from performance manager") |
| 100 | + return metricMap, nil |
| 101 | + } |
| 102 | + |
| 103 | + results, err := p.perfManager.ToMetricSeries(ctx, samples) |
| 104 | + if err != nil { |
| 105 | + return metricMap, fmt.Errorf("failed to convert performance data to metric series: %w", err) |
| 106 | + } |
| 107 | + |
| 108 | + if len(results) == 0 { |
| 109 | + p.logger.Debug("No results returned from metric series conversion") |
| 110 | + return metricMap, nil |
| 111 | + } |
| 112 | + |
| 113 | + for _, result := range results[0].Value { |
| 114 | + if len(result.Value) > 0 { |
| 115 | + value := result.Value[0] |
| 116 | + if result.Unit == string(types.PerformanceManagerUnitPercent) { |
| 117 | + metricMap[result.Name] = float64(value) / 100.0 |
| 118 | + } else { |
| 119 | + metricMap[result.Name] = value |
| 120 | + } |
| 121 | + continue |
| 122 | + } |
| 123 | + p.logger.Debugf("For %s %s, Metric %s: No result found", objectType, objectName, result.Name) |
| 124 | + } |
| 125 | + |
| 126 | + return metricMap, nil |
| 127 | +} |
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