|
| 1 | +package metrics |
| 2 | + |
| 3 | +import ( |
| 4 | + "context" |
| 5 | + "github.com/shirou/gopsutil/cpu" |
| 6 | + "github.com/shirou/gopsutil/net" |
| 7 | + "github.com/zondax/golem/pkg/logger" |
| 8 | + "github.com/zondax/golem/pkg/metrics/collectors" |
| 9 | + "runtime" |
| 10 | + "runtime/pprof" |
| 11 | + "time" |
| 12 | +) |
| 13 | + |
| 14 | +const ( |
| 15 | + memoryUsageBytes = "memory_usage_bytes" |
| 16 | + cpuUsagePercent = "cpu_usage_percent" |
| 17 | + bytesSent = "bytes_sent" |
| 18 | + bytesReceived = "bytes_received" |
| 19 | + activeConnections = "system_active_connections" |
| 20 | + goroutinesCount = "goroutines_count" |
| 21 | + threadsCount = "threads_count" |
| 22 | +) |
| 23 | + |
| 24 | +func RegisterSystemMetrics(metricsServer TaskMetrics) []error { |
| 25 | + var errs []error |
| 26 | + |
| 27 | + register := func(name, help string, labels []string, handler MetricHandler) { |
| 28 | + if err := metricsServer.RegisterMetric(name, help, labels, handler); err != nil { |
| 29 | + errs = append(errs, err) |
| 30 | + } |
| 31 | + } |
| 32 | + |
| 33 | + register(memoryUsageBytes, "Memory usage in bytes.", nil, &collectors.Gauge{}) |
| 34 | + register(cpuUsagePercent, "CPU usage in percent.", nil, &collectors.Gauge{}) |
| 35 | + register(bytesSent, "Total bytes sent over network.", nil, &collectors.Counter{}) |
| 36 | + register(bytesReceived, "Total bytes received over network.", nil, &collectors.Counter{}) |
| 37 | + register(activeConnections, "Number of active network connections.", nil, &collectors.Gauge{}) |
| 38 | + register(goroutinesCount, "Number of goroutines.", nil, &collectors.Gauge{}) |
| 39 | + register(threadsCount, "Number of OS threads.", nil, &collectors.Gauge{}) |
| 40 | + |
| 41 | + return errs |
| 42 | +} |
| 43 | + |
| 44 | +func UpdateSystemMetrics(metricsServer TaskMetrics, updateInterval time.Duration) { |
| 45 | + for { |
| 46 | + var m runtime.MemStats |
| 47 | + runtime.ReadMemStats(&m) |
| 48 | + if err := metricsServer.UpdateMetric(memoryUsageBytes, float64(m.Alloc)); err != nil { |
| 49 | + logger.GetLoggerFromContext(context.Background()).Errorf("error updating %v: %v", memoryUsageBytes, err) |
| 50 | + } |
| 51 | + |
| 52 | + cpuPercents, _ := cpu.Percent(time.Second, false) |
| 53 | + if err := metricsServer.UpdateMetric(cpuUsagePercent, cpuPercents[0]); err != nil { |
| 54 | + logger.GetLoggerFromContext(context.Background()).Errorf("error updating %v: %v", cpuUsagePercent, err) |
| 55 | + } |
| 56 | + |
| 57 | + netIO, _ := net.IOCounters(false) |
| 58 | + if err := metricsServer.UpdateMetric(bytesSent, float64(netIO[0].BytesSent)); err != nil { |
| 59 | + logger.GetLoggerFromContext(context.Background()).Errorf("error updating %v: %v", bytesSent, err) |
| 60 | + } |
| 61 | + if err := metricsServer.UpdateMetric(bytesReceived, float64(netIO[0].BytesRecv)); err != nil { |
| 62 | + logger.GetLoggerFromContext(context.Background()).Errorf("error updating %v: %v", bytesReceived, err) |
| 63 | + } |
| 64 | + |
| 65 | + conns, _ := net.Connections("all") |
| 66 | + if err := metricsServer.UpdateMetric(activeConnections, float64(len(conns))); err != nil { |
| 67 | + logger.GetLoggerFromContext(context.Background()).Errorf("error updating %v: %v", activeConnections, err) |
| 68 | + } |
| 69 | + |
| 70 | + if err := metricsServer.UpdateMetric(goroutinesCount, float64(runtime.NumGoroutine())); err != nil { |
| 71 | + logger.GetLoggerFromContext(context.Background()).Errorf("error updating %v: %v", goroutinesCount, err) |
| 72 | + } |
| 73 | + |
| 74 | + threads := pprof.Lookup("threadcreate").Count() |
| 75 | + if err := metricsServer.UpdateMetric(threadsCount, float64(threads)); err != nil { |
| 76 | + logger.GetLoggerFromContext(context.Background()).Errorf("error updating %v: %v", threadsCount, err) |
| 77 | + } |
| 78 | + |
| 79 | + time.Sleep(updateInterval) |
| 80 | + } |
| 81 | +} |
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