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resourceMonitor.go
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resourceMonitor.go
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package statistics
import (
"context"
"fmt"
"runtime"
"time"
"github.com/ElrondNetwork/elrond-go-core/core"
"github.com/ElrondNetwork/elrond-go-core/core/check"
logger "github.com/ElrondNetwork/elrond-go-logger"
"github.com/ElrondNetwork/elrond-go/common/statistics/machine"
"github.com/ElrondNetwork/elrond-go/config"
"github.com/shirou/gopsutil/cpu"
"github.com/shirou/gopsutil/load"
"github.com/shirou/gopsutil/mem"
"github.com/shirou/gopsutil/net"
"github.com/shirou/gopsutil/process"
)
const minRefreshTimeInSec = 1
var log = logger.GetOrCreate("common/statistics")
// resourceMonitor outputs statistics about resources used by the binary
type resourceMonitor struct {
startTime time.Time
cancelFunc context.CancelFunc
netStats NetworkStatisticsProvider
generalConfig config.Config
}
// NewResourceMonitor creates a new ResourceMonitor instance
func NewResourceMonitor(config config.Config, netStats NetworkStatisticsProvider) (*resourceMonitor, error) {
if check.IfNil(netStats) {
return nil, ErrNilNetworkStatisticsProvider
}
if config.ResourceStats.RefreshIntervalInSec < minRefreshTimeInSec {
return nil, fmt.Errorf("%w, minimum: %d, provided: %d", ErrInvalidRefreshIntervalValue, minRefreshTimeInSec, config.ResourceStats.RefreshIntervalInSec)
}
memoryString := "no memory information"
vms, err := mem.VirtualMemory()
if err == nil {
memoryString = core.ConvertBytes(vms.Total)
}
numCores := -1
rawCpuInfo, err := cpu.Info()
if err == nil {
numCores = len(rawCpuInfo)
}
log.Debug("newResourceMonitor", "numCores", numCores, "memory", memoryString)
return &resourceMonitor{
generalConfig: config,
startTime: time.Now(),
netStats: netStats,
}, nil
}
// GenerateStatistics creates a new statistic string
func (rm *resourceMonitor) GenerateStatistics() []interface{} {
stats := []interface{}{
"uptime", time.Duration(time.Now().UnixNano() - rm.startTime.UnixNano()).Round(time.Second),
}
stats = append(stats, GetRuntimeStatistics()...)
stats = append(stats, rm.generateProcessStatistics()...)
stats = append(stats, rm.generateNetworkStatistics()...)
return stats
}
func (rm *resourceMonitor) generateProcessStatistics() []interface{} {
fileDescriptors := int32(0)
numOpenFiles := 0
numConns := 0
cpuPercent := 0.0
ioStatsString := "no io stats info"
cpuPercentString := "no cpu percent info"
loadAverageString := "no load average info"
proc, err := machine.GetCurrentProcess()
if err == nil {
fileDescriptors, _ = proc.NumFDs()
var openFiles []process.OpenFilesStat
openFiles, err = proc.OpenFiles()
if err == nil {
numOpenFiles = len(openFiles)
}
loadAvg, errLoadAvg := load.Avg()
if errLoadAvg == nil {
loadAverageString = fmt.Sprintf("{avg1min: %.2f, avg5min: %.2f, avg15min: %.2f}",
loadAvg.Load1, loadAvg.Load5, loadAvg.Load15)
}
cpuPercent, err = proc.CPUPercent()
if err == nil {
cpuPercentString = fmt.Sprintf("%.2f", cpuPercent)
}
ioStats, errIoCounters := proc.IOCounters()
if errIoCounters == nil {
ioStatsString = fmt.Sprintf("{readCount: %d, writeCount: %d, readBytes: %s, writeBytes: %s}",
ioStats.ReadCount,
ioStats.WriteCount,
core.ConvertBytes(ioStats.ReadBytes),
core.ConvertBytes(ioStats.WriteBytes))
}
var conns []net.ConnectionStat
conns, err = proc.Connections()
if err == nil {
numConns = len(conns)
}
}
return []interface{}{
"FDs", fileDescriptors,
"num opened files", numOpenFiles,
"num conns", numConns,
"cpuPercent", cpuPercentString,
"cpuLoadAveragePercent", loadAverageString,
"ioStatsString", ioStatsString,
}
}
func (rm *resourceMonitor) generateNetworkStatistics() []interface{} {
netStatsString := fmt.Sprintf("{total received: %s, total sent: %s}",
rm.netStats.TotalReceivedInCurrentEpoch(),
rm.netStats.TotalSentInCurrentEpoch(),
)
return []interface{}{
"host network data size in epoch", netStatsString,
}
}
// GetRuntimeStatistics will return the statistics regarding the current time, memory consumption and the number of running go routines
// These return statistics can be easily output in a log line
func GetRuntimeStatistics() []interface{} {
var memStats runtime.MemStats
runtime.ReadMemStats(&memStats)
return []interface{}{
"timestamp", time.Now().Unix(),
"num go", runtime.NumGoroutine(),
"heap alloc", core.ConvertBytes(memStats.HeapAlloc),
"heap idle", core.ConvertBytes(memStats.HeapIdle),
"heap inuse", core.ConvertBytes(memStats.HeapInuse),
"heap sys", core.ConvertBytes(memStats.HeapSys),
"heap num objs", memStats.HeapObjects,
"sys mem", core.ConvertBytes(memStats.Sys),
"num GC", memStats.NumGC,
}
}
// LogStatistics generates and saves the statistic data in the logs
func (rm *resourceMonitor) LogStatistics() {
stats := rm.GenerateStatistics()
log.Debug("node statistics", stats...)
}
// StartMonitoring starts the monitoring process for saving statistics
func (rm *resourceMonitor) StartMonitoring() {
ctx, cancelFunc := context.WithCancel(context.Background())
rm.cancelFunc = cancelFunc
refreshTime := time.Second * time.Duration(rm.generalConfig.ResourceStats.RefreshIntervalInSec)
timer := time.NewTimer(refreshTime)
defer timer.Stop()
go func() {
for {
rm.LogStatistics()
timer.Reset(refreshTime)
select {
case <-timer.C:
case <-ctx.Done():
log.Debug("closing ResourceMonitor.StartMonitoring go routine")
return
}
}
}()
}
// IsInterfaceNil returns true if underlying object is nil
func (rm *resourceMonitor) IsInterfaceNil() bool {
return rm == nil
}
// Close closes all underlying components
func (rm *resourceMonitor) Close() error {
if rm.cancelFunc != nil {
rm.cancelFunc()
}
return nil
}