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service.go
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service.go
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package vitals
import (
"fmt"
"github.com/cloudfoundry/gosigar"
boshstats "github.com/cloudfoundry/bosh-agent/platform/stats"
boshdirs "github.com/cloudfoundry/bosh-agent/settings/directories"
bosherr "github.com/cloudfoundry/bosh-utils/errors"
)
type Service interface {
Get() (vitals Vitals, err error)
}
type concreteService struct {
statsCollector boshstats.Collector
dirProvider boshdirs.Provider
}
func NewService(statsCollector boshstats.Collector, dirProvider boshdirs.Provider) Service {
return concreteService{
statsCollector: statsCollector,
dirProvider: dirProvider,
}
}
func (s concreteService) Get() (vitals Vitals, err error) {
var (
loadStats boshstats.CPULoad
cpuStats boshstats.CPUStats
memStats boshstats.Usage
swapStats boshstats.Usage
diskStats DiskVitals
)
loadStats, err = s.statsCollector.GetCPULoad()
if err != nil && err != sigar.ErrNotImplemented {
err = bosherr.WrapError(err, "Getting CPU Load")
return
}
cpuStats, err = s.statsCollector.GetCPUStats()
if err != nil {
err = bosherr.WrapError(err, "Getting CPU Stats")
return
}
memStats, err = s.statsCollector.GetMemStats()
if err != nil {
err = bosherr.WrapError(err, "Getting Memory Stats")
return
}
swapStats, err = s.statsCollector.GetSwapStats()
if err != nil {
err = bosherr.WrapError(err, "Getting Swap Stats")
return
}
diskStats, err = s.getDiskStats()
if err != nil {
err = bosherr.WrapError(err, "Getting Disk Stats")
return
}
vitals = Vitals{
Load: createLoadVitals(loadStats),
CPU: CPUVitals{
User: cpuStats.UserPercent().FormatFractionOf100(1),
Sys: cpuStats.SysPercent().FormatFractionOf100(1),
Wait: cpuStats.WaitPercent().FormatFractionOf100(1),
},
Mem: createMemVitals(memStats),
Swap: createMemVitals(swapStats),
Disk: diskStats,
}
return
}
func (s concreteService) getDiskStats() (diskStats DiskVitals, err error) {
disks := map[string]string{
"/": "system",
s.dirProvider.DataDir(): "ephemeral",
s.dirProvider.StoreDir(): "persistent",
}
diskStats = make(DiskVitals, len(disks))
for path, name := range disks {
diskStats, err = s.addDiskStats(diskStats, path, name)
if err != nil {
return
}
}
return
}
func (s concreteService) addDiskStats(diskStats DiskVitals, path, name string) (updated DiskVitals, err error) {
updated = diskStats
stat, diskErr := s.statsCollector.GetDiskStats(path)
if diskErr != nil {
if path == "/" {
err = bosherr.WrapError(diskErr, "Getting Disk Stats for /")
}
return
}
updated[name] = SpecificDiskVitals{
Percent: stat.DiskUsage.Percent().FormatFractionOf100(0),
InodePercent: stat.InodeUsage.Percent().FormatFractionOf100(0),
}
return
}
func createMemVitals(memUsage boshstats.Usage) MemoryVitals {
return MemoryVitals{
Percent: memUsage.Percent().FormatFractionOf100(0),
Kb: fmt.Sprintf("%d", memUsage.Used/1024),
}
}