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// +build darwin freebsd linux openbsd windows
package cpu
import (
"strings"
"github.com/pkg/errors"
"github.com/elastic/beats/libbeat/common"
"github.com/elastic/beats/metricbeat/mb"
"github.com/elastic/beats/metricbeat/mb/parse"
"github.com/elastic/beats/metricbeat/module/system"
)
func init() {
if err := mb.Registry.AddMetricSet("system", "cpu", New, parse.EmptyHostParser); err != nil {
panic(err)
}
}
// MetricSet for fetching system CPU metrics.
type MetricSet struct {
mb.BaseMetricSet
config Config
cpu *system.CPUMonitor
}
// New is a mb.MetricSetFactory that returns a cpu.MetricSet.
func New(base mb.BaseMetricSet) (mb.MetricSet, error) {
config := defaultConfig
if err := base.Module().UnpackConfig(&config); err != nil {
return nil, err
}
if config.CPUTicks != nil && *config.CPUTicks {
config.Metrics = append(config.Metrics, "ticks")
}
return &MetricSet{
BaseMetricSet: base,
config: config,
cpu: new(system.CPUMonitor),
}, nil
}
// Fetch fetches CPU metrics from the OS.
func (m *MetricSet) Fetch() (common.MapStr, error) {
sample, err := m.cpu.Sample()
if err != nil {
return nil, errors.Wrap(err, "failed to fetch CPU times")
}
event := common.MapStr{"cores": system.NumCPU}
for _, metric := range m.config.Metrics {
switch strings.ToLower(metric) {
case percentages:
pct := sample.Percentages()
event.Put("user.pct", pct.User)
event.Put("system.pct", pct.System)
event.Put("idle.pct", pct.Idle)
event.Put("iowait.pct", pct.IOWait)
event.Put("irq.pct", pct.IRQ)
event.Put("nice.pct", pct.Nice)
event.Put("softirq.pct", pct.SoftIRQ)
event.Put("steal.pct", pct.Steal)
event.Put("total.pct", pct.Total)
case normalizedPercentages:
normalizedPct := sample.NormalizedPercentages()
event.Put("user.norm.pct", normalizedPct.User)
event.Put("system.norm.pct", normalizedPct.System)
event.Put("idle.norm.pct", normalizedPct.Idle)
event.Put("iowait.norm.pct", normalizedPct.IOWait)
event.Put("irq.norm.pct", normalizedPct.IRQ)
event.Put("nice.norm.pct", normalizedPct.Nice)
event.Put("softirq.norm.pct", normalizedPct.SoftIRQ)
event.Put("steal.norm.pct", normalizedPct.Steal)
event.Put("total.norm.pct", normalizedPct.Total)
case ticks:
ticks := sample.Ticks()
event.Put("user.ticks", ticks.User)
event.Put("system.ticks", ticks.System)
event.Put("idle.ticks", ticks.Idle)
event.Put("iowait.ticks", ticks.IOWait)
event.Put("irq.ticks", ticks.IRQ)
event.Put("nice.ticks", ticks.Nice)
event.Put("softirq.ticks", ticks.SoftIRQ)
event.Put("steal.ticks", ticks.Steal)
}
}
return event, nil
}
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