forked from mackerelio/mackerel-agent
/
interface.go
72 lines (58 loc) · 1.7 KB
/
interface.go
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// +build !windows
package metrics
import (
"strings"
"time"
"github.com/mackerelio/go-osstat/network"
"github.com/mackerelio/golib/logging"
"github.com/mackerelio/mackerel-agent/util"
)
/*
collect network interface I/O
`interface.{interface}.{metric}.delta`: The increased amount of network I/O per minute retrieved from /proc/net/dev
interface = "eth0", "eth1" and so on... ("en0" on darwin)
*/
// InterfaceGenerator generates interface metric values
type InterfaceGenerator struct {
Interval time.Duration
}
var interfaceLogger = logging.GetLogger("metrics.interface")
// Generate interface metric values
func (g *InterfaceGenerator) Generate() (Values, error) {
prevValues, err := g.collectInterfacesValues()
if err != nil {
return nil, err
}
time.Sleep(g.Interval)
currValues, err := g.collectInterfacesValues()
if err != nil {
return nil, err
}
ret := make(map[string]float64)
for name, prevValue := range prevValues {
if currValue, ok := currValues[name]; ok && currValue >= prevValue {
ret[name+".delta"] = float64(currValue-prevValue) / g.Interval.Seconds()
}
}
return Values(ret), nil
}
func (g *InterfaceGenerator) collectInterfacesValues() (map[string]uint64, error) {
networks, err := network.Get()
if err != nil {
interfaceLogger.Errorf("failed to get network statistics: %s", err)
return nil, err
}
if len(networks) == 0 {
return nil, nil
}
results := make(map[string]uint64, len(networks)*2)
for _, network := range networks {
name := util.SanitizeMetricKey(network.Name)
if strings.HasPrefix(name, "veth") {
continue
}
results["interface."+name+".rxBytes"] = network.RxBytes
results["interface."+name+".txBytes"] = network.TxBytes
}
return results, nil
}