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274 lines
9.6 KiB
Go
274 lines
9.6 KiB
Go
package agent
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import (
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"context"
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"strings"
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"time"
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"github.com/fnproject/fn/api/common"
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"github.com/sirupsen/logrus"
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"go.opencensus.io/stats"
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"go.opencensus.io/stats/view"
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)
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func statsCalls(ctx context.Context) {
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stats.Record(ctx, callsMeasure.M(1))
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}
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func statsEnqueue(ctx context.Context) {
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stats.Record(ctx, queuedMeasure.M(1))
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}
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func statsDequeue(ctx context.Context) {
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stats.Record(ctx, queuedMeasure.M(-1))
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}
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func statsStartRun(ctx context.Context) {
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stats.Record(ctx, runningMeasure.M(1))
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}
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func statsStopRun(ctx context.Context) {
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stats.Record(ctx, runningMeasure.M(-1))
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}
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func statsComplete(ctx context.Context) {
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stats.Record(ctx, completedMeasure.M(1))
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}
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func statsCanceled(ctx context.Context) {
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stats.Record(ctx, canceledMeasure.M(1))
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}
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func statsTimedout(ctx context.Context) {
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stats.Record(ctx, timedoutMeasure.M(1))
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}
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func statsErrors(ctx context.Context) {
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stats.Record(ctx, errorsMeasure.M(1))
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}
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func statsTooBusy(ctx context.Context) {
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stats.Record(ctx, serverBusyMeasure.M(1))
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}
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func statsLBAgentRunnerSchedLatency(ctx context.Context, dur time.Duration) {
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stats.Record(ctx, runnerSchedLatencyMeasure.M(int64(dur/time.Millisecond)))
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}
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func statsLBAgentRunnerExecLatency(ctx context.Context, dur time.Duration) {
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stats.Record(ctx, runnerExecLatencyMeasure.M(int64(dur/time.Millisecond)))
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}
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func statsContainerEvicted(ctx context.Context) {
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stats.Record(ctx, containerEvictedMeasure.M(0))
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}
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func statsUtilization(ctx context.Context, util ResourceUtilization) {
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stats.Record(ctx, utilCpuUsedMeasure.M(int64(util.CpuUsed)))
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stats.Record(ctx, utilCpuAvailMeasure.M(int64(util.CpuAvail)))
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stats.Record(ctx, utilMemUsedMeasure.M(int64(util.MemUsed)))
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stats.Record(ctx, utilMemAvailMeasure.M(int64(util.MemAvail)))
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}
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const (
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//
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// WARNING: Dual Role Metrics both used in Runner/Agent and LB-Agent
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//
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// LB Context:
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//
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// calls - call received in Agent Submit
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// queued - LB is reading request from Client and attempting to validate/start
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// running - LB is forwarding Call to runners
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// completed - call completed running successfully
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// canceled - call canceled (client disconnect)
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// timeouts - call timed out
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// errors - call failed
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// server_busy - server busy responses (retriable)
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//
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// Agent/Runner Context:
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//
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// calls - calls received in Agent Submit
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// queued - Reading/validating call from client and waiting for resources/containers to start
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// running - call is now running
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// completed - call completed running (success)
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// canceled - call canceled (client disconnect)
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// timeouts - call timed out
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// errors - call failed
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// server_busy - server busy responses (retriable)
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//
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queuedMetricName = "queued"
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callsMetricName = "calls"
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runningMetricName = "running"
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completedMetricName = "completed"
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canceledMetricName = "canceled"
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timedoutMetricName = "timeouts"
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errorsMetricName = "errors"
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serverBusyMetricName = "server_busy"
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containerEvictedMetricName = "container_evictions"
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utilCpuUsedMetricName = "util_cpu_used"
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utilCpuAvailMetricName = "util_cpu_avail"
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utilMemUsedMetricName = "util_mem_used"
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utilMemAvailMetricName = "util_mem_avail"
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// Reported By LB
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runnerSchedLatencyMetricName = "lb_runner_sched_latency"
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runnerExecLatencyMetricName = "lb_runner_exec_latency"
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)
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var (
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queuedMeasure = common.MakeMeasure(queuedMetricName, "calls currently queued against agent", "")
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callsMeasure = common.MakeMeasure(callsMetricName, "calls created in agent", "")
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runningMeasure = common.MakeMeasure(runningMetricName, "calls currently running in agent", "")
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completedMeasure = common.MakeMeasure(completedMetricName, "calls completed in agent", "")
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canceledMeasure = common.MakeMeasure(canceledMetricName, "calls canceled in agent", "")
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timedoutMeasure = common.MakeMeasure(timedoutMetricName, "calls timed out in agent", "")
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errorsMeasure = common.MakeMeasure(errorsMetricName, "calls errored in agent", "")
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serverBusyMeasure = common.MakeMeasure(serverBusyMetricName, "calls where server was too busy in agent", "")
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dockerMeasures = initDockerMeasures()
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containerGaugeMeasures = initContainerGaugeMeasures()
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containerTimeMeasures = initContainerTimeMeasures()
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utilCpuUsedMeasure = common.MakeMeasure(utilCpuUsedMetricName, "agent cpu in use", "")
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utilCpuAvailMeasure = common.MakeMeasure(utilCpuAvailMetricName, "agent cpu available", "")
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utilMemUsedMeasure = common.MakeMeasure(utilMemUsedMetricName, "agent memory in use", "By")
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utilMemAvailMeasure = common.MakeMeasure(utilMemAvailMetricName, "agent memory available", "By")
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containerEvictedMeasure = common.MakeMeasure(containerEvictedMetricName, "containers evicted", "")
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// Reported By LB: How long does a runner scheduler wait for a committed call? eg. wait/launch/pull containers
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runnerSchedLatencyMeasure = common.MakeMeasure(runnerSchedLatencyMetricName, "Runner Scheduler Latency Reported By LBAgent", "msecs")
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// Reported By LB: Function execution time inside a container.
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runnerExecLatencyMeasure = common.MakeMeasure(runnerExecLatencyMetricName, "Runner Container Execution Latency Reported By LBAgent", "msecs")
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)
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func RegisterLBAgentViews(tagKeys []string, latencyDist []float64) {
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err := view.Register(
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common.CreateView(runnerSchedLatencyMeasure, view.Distribution(latencyDist...), tagKeys),
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common.CreateView(runnerExecLatencyMeasure, view.Distribution(latencyDist...), tagKeys),
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)
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if err != nil {
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logrus.WithError(err).Fatal("cannot register view")
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}
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}
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// RegisterAgentViews creates and registers all agent views
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func RegisterAgentViews(tagKeys []string, latencyDist []float64) {
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err := view.Register(
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common.CreateView(queuedMeasure, view.Sum(), tagKeys),
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common.CreateView(callsMeasure, view.Sum(), tagKeys),
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common.CreateView(runningMeasure, view.Sum(), tagKeys),
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common.CreateView(completedMeasure, view.Sum(), tagKeys),
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common.CreateView(canceledMeasure, view.Sum(), tagKeys),
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common.CreateView(timedoutMeasure, view.Sum(), tagKeys),
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common.CreateView(errorsMeasure, view.Sum(), tagKeys),
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common.CreateView(serverBusyMeasure, view.Sum(), tagKeys),
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common.CreateView(utilCpuUsedMeasure, view.LastValue(), tagKeys),
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common.CreateView(utilCpuAvailMeasure, view.LastValue(), tagKeys),
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common.CreateView(utilMemUsedMeasure, view.LastValue(), tagKeys),
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common.CreateView(utilMemAvailMeasure, view.LastValue(), tagKeys),
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)
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if err != nil {
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logrus.WithError(err).Fatal("cannot register view")
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}
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}
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// RegisterDockerViews creates a and registers Docker views with provided tag keys
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func RegisterDockerViews(tagKeys []string, latencyDist, ioNetDist, ioDiskDist, memoryDist, cpuDist []float64) {
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for _, m := range dockerMeasures {
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var dist *view.Aggregation
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// Remember these are sampled by docker in short intervals (approx 1 sec)
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if m.Name() == "docker_stats_net_rx" || m.Name() == "docker_stats_net_tx" {
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dist = view.Distribution(ioNetDist...)
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} else if m.Name() == "docker_stats_disk_read" || m.Name() == "docker_stats_disk_write" {
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dist = view.Distribution(ioDiskDist...)
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} else if m.Name() == "docker_stats_mem_limit" || m.Name() == "docker_stats_mem_usage" {
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dist = view.Distribution(memoryDist...)
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} else if m.Name() == "docker_stats_cpu_user" || m.Name() == "docker_stats_cpu_total" || m.Name() == "docker_stats_cpu_kernel" {
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dist = view.Distribution(cpuDist...)
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} else {
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// Not used yet.
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dist = view.Distribution(latencyDist...)
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}
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v := common.CreateView(m, dist, tagKeys)
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if err := view.Register(v); err != nil {
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logrus.WithError(err).Fatal("cannot register view")
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}
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}
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}
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// RegisterContainerViews creates and register containers views with provided tag keys
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func RegisterContainerViews(tagKeys []string, latencyDist []float64) {
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// Create views for container measures
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for i, key := range containerGaugeKeys {
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if key == "" {
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continue
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}
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v := common.CreateView(containerGaugeMeasures[i], view.Sum(), tagKeys)
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if err := view.Register(v); err != nil {
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logrus.WithError(err).Fatal("cannot register view")
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}
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}
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for i, key := range containerTimeKeys {
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if key == "" {
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continue
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}
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v := common.CreateView(containerTimeMeasures[i], view.Distribution(latencyDist...), tagKeys)
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if err := view.Register(v); err != nil {
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logrus.WithError(err).Fatal("cannot register view")
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}
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}
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err := view.Register(
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common.CreateView(containerEvictedMeasure, view.Count(), tagKeys),
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)
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if err != nil {
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logrus.WithError(err).Fatal("cannot register view")
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}
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}
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// initDockerMeasures initializes Docker related measures
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func initDockerMeasures() map[string]*stats.Int64Measure {
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// TODO this is nasty figure out how to use opencensus to not have to declare these
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keys := []string{"net_rx", "net_tx", "mem_limit", "mem_usage", "disk_read", "disk_write", "cpu_user", "cpu_total", "cpu_kernel"}
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measures := make(map[string]*stats.Int64Measure, len(keys))
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for _, key := range keys {
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units := "bytes"
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if strings.Contains(key, "cpu") {
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units = "cpu"
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}
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measures[key] = common.MakeMeasure("docker_stats_"+key, "docker container stats for "+key, units)
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}
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return measures
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}
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func initContainerGaugeMeasures() []*stats.Int64Measure {
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gaugeMeasures := make([]*stats.Int64Measure, len(containerGaugeKeys))
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for i, key := range containerGaugeKeys {
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if key == "" { // leave nil intentionally, let it panic
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continue
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}
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gaugeMeasures[i] = common.MakeMeasure(key, "containers in state "+key, "")
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}
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return gaugeMeasures
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}
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func initContainerTimeMeasures() []*stats.Int64Measure {
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timeMeasures := make([]*stats.Int64Measure, len(containerTimeKeys))
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for i, key := range containerTimeKeys {
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if key == "" {
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continue
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}
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timeMeasures[i] = common.MakeMeasure(key, "time spent in container state "+key, "ms")
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}
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return timeMeasures
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}
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