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55 lines
1.2 KiB
Go
55 lines
1.2 KiB
Go
package main
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import (
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"math"
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"github.com/fsouza/go-dockerclient"
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)
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type StatReader struct {
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CPUUtil int
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NetTx int64
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NetRx int64
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MemLimit int64
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MemPercent int
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MemUsage int64
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lastCpu float64
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lastSysCpu float64
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}
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func (s *StatReader) Read(stats *docker.Stats) {
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s.ReadCPU(stats)
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s.ReadMem(stats)
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s.ReadNet(stats)
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}
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func (s *StatReader) ReadCPU(stats *docker.Stats) {
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ncpus := float64(len(stats.CPUStats.CPUUsage.PercpuUsage))
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total := float64(stats.CPUStats.CPUUsage.TotalUsage)
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system := float64(stats.CPUStats.SystemCPUUsage)
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cpudiff := total - s.lastCpu
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syscpudiff := system - s.lastSysCpu
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s.CPUUtil = round((cpudiff / syscpudiff * 100) * ncpus)
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s.lastCpu = total
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s.lastSysCpu = system
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}
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func (s *StatReader) ReadMem(stats *docker.Stats) {
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s.MemUsage = int64(stats.MemoryStats.Usage)
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s.MemLimit = int64(stats.MemoryStats.Limit)
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s.MemPercent = round((float64(s.MemUsage) / float64(s.MemLimit)) * 100)
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}
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func (s *StatReader) ReadNet(stats *docker.Stats) {
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s.NetTx, s.NetRx = 0, 0
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for _, network := range stats.Networks {
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s.NetTx += int64(network.TxBytes)
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s.NetRx += int64(network.RxBytes)
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}
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}
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func round(num float64) int {
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return int(num + math.Copysign(0.5, num))
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}
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