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/*
* =========================================================================================
* Copyright © 2013-2014 the kamon project <http://kamon.io/>
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the
* License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
* either express or implied. See the License for the specific language governing permissions
* and limitations under the License.
* =========================================================================================
*/
package kamon.system
import java.io.{ File, IOException }
import akka.actor.{ Actor, ActorLogging, Props }
import kamon.Kamon
import kamon.metric.Metrics
import kamon.metrics.CPUMetrics.CPUMetricRecorder
import kamon.metrics.ContextSwitchesMetrics.ContextSwitchesMetricsRecorder
import kamon.metrics.DiskMetrics.DiskMetricsRecorder
import kamon.metrics.LoadAverageMetrics.LoadAverageMetricsRecorder
import kamon.metrics.MemoryMetrics.MemoryMetricRecorder
import kamon.metrics.NetworkMetrics.NetworkMetricRecorder
import kamon.metrics.ProcessCPUMetrics.ProcessCPUMetricsRecorder
import kamon.metrics._
import kamon.sigar.SigarProvisioner
import org.hyperic.sigar._
import scala.collection.concurrent.TrieMap
import scala.concurrent.duration.FiniteDuration
import scala.io.Source
import scala.collection.mutable
class SystemMetricsCollector(collectInterval: FiniteDuration) extends Actor with ActorLogging with SystemMetricsBanner {
import kamon.system.SystemMetricsCollector._
import kamon.system.SystemMetricsExtension._
lazy val sigar = createSigarInstance
def pid = sigar.getPid
val interfaces = sigar.getNetInterfaceList.filterNot(NetworkFilter).toSet
val fileSystems = sigar.getFileSystemList.filter(_.getType == FileSystem.TYPE_LOCAL_DISK).map(_.getDevName).toSet
val metricExtension = Kamon(Metrics)(context.system)
val collectSchedule = context.system.scheduler.schedule(collectInterval, collectInterval, self, Collect)(SystemMetrics(context.system).dispatcher)
val cpuRecorder = metricExtension.register(CPUMetrics(CPU), CPUMetrics.Factory)
val processCpuRecorder = metricExtension.register(ProcessCPUMetrics(ProcessCPU), ProcessCPUMetrics.Factory)
val memoryRecorder = metricExtension.register(MemoryMetrics(Memory), MemoryMetrics.Factory)
val networkRecorder = metricExtension.register(NetworkMetrics(Network), NetworkMetrics.Factory)
val contextSwitchesRecorder = metricExtension.register(ContextSwitchesMetrics(ContextSwitches), ContextSwitchesMetrics.Factory)
val diskRecorder = metricExtension.register(DiskMetrics(Disk), DiskMetrics.Factory)
val loadAverageRecorder = metricExtension.register(LoadAverageMetrics(LoadAverage), LoadAverageMetrics.Factory)
def receive: Receive = {
case Collect ⇒ collectMetrics()
}
override def postStop() = collectSchedule.cancel()
def collectMetrics() = {
cpuRecorder.map(recordCpu)
processCpuRecorder.map(recordProcessCpu)
memoryRecorder.map(recordMemory)
networkRecorder.map(recordNetwork)
diskRecorder.map(recordDisk)
loadAverageRecorder.map(recordLoadAverage)
if (OsUtils.isLinux)
contextSwitchesRecorder.map(recordContextSwitches)
}
private def recordCpu(cpur: CPUMetricRecorder) = {
val cpuPerc = sigar.getCpuPerc
cpur.user.record(toLong(cpuPerc.getUser))
cpur.system.record(toLong(cpuPerc.getSys))
cpur.cpuWait.record(toLong(cpuPerc.getWait))
cpur.idle.record(toLong(cpuPerc.getIdle))
cpur.stolen.record(toLong(cpuPerc.getStolen))
}
private def recordProcessCpu(pcpur: ProcessCPUMetricsRecorder) = {
val procCpu = sigar.getProcCpu(pid)
val procTime = sigar.getProcTime(pid)
pcpur.cpuPercent.record(toLong(procCpu.getPercent))
pcpur.totalProcessTime.record(procTime.getTotal) // gives an idea of what is really measured and then interpreted as %
}
private def recordMemory(mr: MemoryMetricRecorder) = {
val mem = sigar.getMem
val swap = sigar.getSwap
mr.used.record(toMB(mem.getUsed))
mr.free.record(toMB(mem.getFree))
mr.swapUsed.record(toMB(swap.getUsed))
mr.swapFree.record(toMB(swap.getFree))
mr.buffer.record(toMB(collectBuffer(mem)))
mr.cache.record(toMB(collectCache(mem)))
def collectBuffer(mem: Mem): Long = if (mem.getUsed != mem.getActualUsed) mem.getActualUsed else 0L
def collectCache(mem: Mem): Long = if (mem.getFree != mem.getActualFree) mem.getActualFree else 0L
}
private def recordNetwork(nr: NetworkMetricRecorder) = {
import Networks._
nr.rxBytes.record(collect(sigar, interfaces, RxBytes, previousNetworkMetrics)(net ⇒ toKB(net.getRxBytes)))
nr.txBytes.record(collect(sigar, interfaces, TxBytes, previousNetworkMetrics)(net ⇒ toKB(net.getTxBytes)))
nr.rxErrors.record(collect(sigar, interfaces, RxErrors, previousNetworkMetrics)(net ⇒ net.getRxErrors))
nr.txErrors.record(collect(sigar, interfaces, TxErrors, previousNetworkMetrics)(net ⇒ net.getTxErrors))
nr.rxDropped.record(collect(sigar, interfaces, RxDropped, previousNetworkMetrics)(net ⇒ net.getRxDropped))
nr.txDropped.record(collect(sigar, interfaces, TxDropped, previousNetworkMetrics)(net ⇒ net.getTxDropped))
def collect(sigar: SigarProxy, interfaces: Set[String], name: String, previousMetrics: TrieMap[String, mutable.Map[String, Long]])(thunk: NetInterfaceStat ⇒ Long): Long = {
interfaces.foldLeft(0L) { (acc, interface) ⇒
{
val net = sigar.getNetInterfaceStat(interface)
val previous = previousMetrics.getOrElse(interface, mutable.Map.empty[String, Long])
val current = thunk(net)
val delta = current - previous.getOrElse(name, 0L)
previousMetrics.put(interface, previous += name -> current)
acc + delta
}
}
}
}
private def recordDisk(rd: DiskMetricsRecorder) = {
import Disks._
rd.reads.record(collect(sigar, fileSystems, Reads, previousDiskMetrics)(disk ⇒ disk.getReads))
rd.writes.record(collect(sigar, fileSystems, Writes, previousDiskMetrics)(disk ⇒ disk.getWrites))
rd.queue.record(collect(sigar, fileSystems, Queue, previousDiskMetrics)(disk ⇒ toLong(disk.getQueue)))
rd.serviceTime.record(collect(sigar, fileSystems, Service, previousDiskMetrics)(disk ⇒ toLong(disk.getServiceTime)))
}
def collect(sigar: SigarProxy, fileSystems: Set[String], name: String, previousMetrics: TrieMap[String, mutable.Map[String, Long]])(thunk: DiskUsage ⇒ Long): Long = {
fileSystems.foldLeft(0L) { (acc, fileSystem) ⇒
{
val disk = sigar.getDiskUsage(fileSystem)
val previous = previousMetrics.getOrElse(fileSystem, mutable.Map.empty[String, Long])
val value = thunk(disk)
val current = if (value == Sigar.FIELD_NOTIMPL) 0L else value
val delta = current - previous.getOrElse(name, 0L)
previousMetrics.put(fileSystem, previous += name -> current)
acc + delta
}
}
}
private def recordLoadAverage(lar: LoadAverageMetricsRecorder) = {
val loadAverage = sigar.getLoadAverage
val (one, five, fifteen) = (loadAverage(0), loadAverage(1), loadAverage(2))
lar.one.record(toLong(one))
lar.five.record(toLong(five))
lar.fifteen.record(toLong(fifteen))
}
private def recordContextSwitches(rcs: ContextSwitchesMetricsRecorder) = {
def contextSwitchesByProcess(pid: Long): (Long, Long) = {
val filename = s"/proc/$pid/status"
var voluntaryContextSwitches = 0L
var nonVoluntaryContextSwitches = 0L
try {
for (line ← Source.fromFile(filename).getLines()) {
if (line.startsWith("voluntary_ctxt_switches")) {
voluntaryContextSwitches = line.substring(line.indexOf(":") + 1).trim.toLong
}
if (line.startsWith("nonvoluntary_ctxt_switches")) {
nonVoluntaryContextSwitches = line.substring(line.indexOf(":") + 1).trim.toLong
}
}
} catch {
case ex: IOException ⇒ log.error("Error trying to read [{}]", filename)
}
(voluntaryContextSwitches, nonVoluntaryContextSwitches)
}
def contextSwitches: Long = {
val filename = "/proc/stat"
var contextSwitches = 0L
try {
for (line ← Source.fromFile(filename).getLines()) {
if (line.startsWith("rcs")) {
contextSwitches = line.substring(line.indexOf(" ") + 1).toLong
}
}
} catch {
case ex: IOException ⇒ log.error("Error trying to read [{}]", filename)
}
contextSwitches
}
val (perProcessVoluntary, perProcessNonVoluntary) = contextSwitchesByProcess(pid)
rcs.perProcessVoluntary.record(perProcessVoluntary)
rcs.perProcessNonVoluntary.record(perProcessNonVoluntary)
rcs.global.record(contextSwitches)
}
def verifiedSigarInstance: SigarProxy = {
val sigar = new Sigar()
printBanner(sigar)
sigar
}
def provisionSigarLibrary: Unit = {
val folder = SystemMetrics(context.system).sigarFolder
SigarProvisioner.provision(new File(folder))
}
def createSigarInstance: SigarProxy = {
// 1) Assume that library is already provisioned.
try {
return verifiedSigarInstance
} catch {
// Not using [[Try]] - any error is non-fatal in this case.
case e: Throwable ⇒ log.info(s"Sigar is not yet provisioned: ${e}")
}
// 2) Attempt to provision library via sigar-loader.
try {
provisionSigarLibrary
return verifiedSigarInstance
} catch {
// Not using [[Try]] - any error is non-fatal in this case.
case e: Throwable ⇒ throw new UnexpectedSigarException(s"Failed to load Sigar: ${e}")
}
}
}
object SystemMetricsCollector {
val NetworkFilter = Set("lo")
val previousDiskMetrics = TrieMap[String, mutable.Map[String, Long]]()
val previousNetworkMetrics = TrieMap[String, mutable.Map[String, Long]]()
object Networks {
val RxBytes = "rxBytes"
val TxBytes = "txBytes"
val RxErrors = "rxErrors"
val TxErrors = "txErrors"
val RxDropped = "rxDropped"
val TxDropped = "txDropped"
}
object Disks {
val Reads = "reads"
val Writes = "writes"
val Queue = "queue"
val Service = "service"
}
case object Collect
object OsUtils {
def isLinux: Boolean = System.getProperty("os.name").indexOf("Linux") != -1
}
def props(collectInterval: FiniteDuration): Props = Props(classOf[SystemMetricsCollector], collectInterval)
}
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