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fn: stats view/distribution improvements (#1154)

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* fn: stats view/distribution improvements

*) View latency distribution is now an argument
in view creation functions. This allows easier
override to set custom buckets. It is simplistic
and assumes all latency views would use the same
set, but in practice this is already the case.
*) Removed API view creation to main, this should not
be enabled for all node types. This is consistent with
the rest of the system.

* fn: Docker samples of cpu/mem/disk with specific buckets
This commit is contained in:
Tolga Ceylan
2018-08-03 11:06:54 -07:00
committed by GitHub
parent 19b39b7601
commit 0105f8321e
10 changed files with 168 additions and 238 deletions
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116
api/agent/stats.go
View File

@@ -5,10 +5,11 @@ import (
"strings"
"time"
"github.com/fnproject/fn/api/common"
"github.com/sirupsen/logrus"
"go.opencensus.io/stats"
"go.opencensus.io/stats/view"
"go.opencensus.io/tag"
)
// TODO add some suga:
@@ -82,29 +83,29 @@ const (
)
var (
queuedMeasure = makeMeasure(queuedMetricName, "calls currently queued against agent", "")
queuedMeasure = common.MakeMeasure(queuedMetricName, "calls currently queued against agent", "")
// TODO this is a dupe of sum {complete,failed} ?
callsMeasure = makeMeasure(callsMetricName, "calls created in agent", "")
runningMeasure = makeMeasure(runningMetricName, "calls currently running in agent", "")
completedMeasure = makeMeasure(completedMetricName, "calls completed in agent", "")
failedMeasure = makeMeasure(failedMetricName, "calls failed in agent", "")
timedoutMeasure = makeMeasure(timedoutMetricName, "calls timed out in agent", "")
errorsMeasure = makeMeasure(errorsMetricName, "calls errored in agent", "")
serverBusyMeasure = makeMeasure(serverBusyMetricName, "calls where server was too busy in agent", "")
callsMeasure = common.MakeMeasure(callsMetricName, "calls created in agent", "")
runningMeasure = common.MakeMeasure(runningMetricName, "calls currently running in agent", "")
completedMeasure = common.MakeMeasure(completedMetricName, "calls completed in agent", "")
failedMeasure = common.MakeMeasure(failedMetricName, "calls failed in agent", "")
timedoutMeasure = common.MakeMeasure(timedoutMetricName, "calls timed out in agent", "")
errorsMeasure = common.MakeMeasure(errorsMetricName, "calls errored in agent", "")
serverBusyMeasure = common.MakeMeasure(serverBusyMetricName, "calls where server was too busy in agent", "")
dockerMeasures = initDockerMeasures()
containerGaugeMeasures = initContainerGaugeMeasures()
containerTimeMeasures = initContainerTimeMeasures()
// Reported By LB: How long does a runner scheduler wait for a committed call? eg. wait/launch/pull containers
runnerSchedLatencyMeasure = makeMeasure(runnerSchedLatencyMetricName, "Runner Scheduler Latency Reported By LBAgent", "msecs")
runnerSchedLatencyMeasure = common.MakeMeasure(runnerSchedLatencyMetricName, "Runner Scheduler Latency Reported By LBAgent", "msecs")
// Reported By LB: Function execution time inside a container.
runnerExecLatencyMeasure = makeMeasure(runnerExecLatencyMetricName, "Runner Container Execution Latency Reported By LBAgent", "msecs")
runnerExecLatencyMeasure = common.MakeMeasure(runnerExecLatencyMetricName, "Runner Container Execution Latency Reported By LBAgent", "msecs")
)
func RegisterLBAgentViews(tagKeys []string) {
func RegisterLBAgentViews(tagKeys []string, latencyDist []float64) {
err := view.Register(
createView(runnerSchedLatencyMeasure, view.Distribution(1, 10, 50, 100, 250, 500, 1000, 10000, 60000, 120000), tagKeys),
createView(runnerExecLatencyMeasure, view.Distribution(1, 10, 50, 100, 250, 500, 1000, 10000, 60000, 120000), tagKeys),
common.CreateView(runnerSchedLatencyMeasure, view.Distribution(latencyDist...), tagKeys),
common.CreateView(runnerExecLatencyMeasure, view.Distribution(latencyDist...), tagKeys),
)
if err != nil {
logrus.WithError(err).Fatal("cannot register view")
@@ -112,16 +113,16 @@ func RegisterLBAgentViews(tagKeys []string) {
}
// RegisterAgentViews creates and registers all agent views
func RegisterAgentViews(tagKeys []string) {
func RegisterAgentViews(tagKeys []string, latencyDist []float64) {
err := view.Register(
createView(queuedMeasure, view.Sum(), tagKeys),
createView(callsMeasure, view.Sum(), tagKeys),
createView(runningMeasure, view.Sum(), tagKeys),
createView(completedMeasure, view.Sum(), tagKeys),
createView(failedMeasure, view.Sum(), tagKeys),
createView(timedoutMeasure, view.Sum(), tagKeys),
createView(errorsMeasure, view.Sum(), tagKeys),
createView(serverBusyMeasure, view.Sum(), tagKeys),
common.CreateView(queuedMeasure, view.Sum(), tagKeys),
common.CreateView(callsMeasure, view.Sum(), tagKeys),
common.CreateView(runningMeasure, view.Sum(), tagKeys),
common.CreateView(completedMeasure, view.Sum(), tagKeys),
common.CreateView(failedMeasure, view.Sum(), tagKeys),
common.CreateView(timedoutMeasure, view.Sum(), tagKeys),
common.CreateView(errorsMeasure, view.Sum(), tagKeys),
common.CreateView(serverBusyMeasure, view.Sum(), tagKeys),
)
if err != nil {
logrus.WithError(err).Fatal("cannot register view")
@@ -129,9 +130,33 @@ func RegisterAgentViews(tagKeys []string) {
}
// RegisterDockerViews creates a and registers Docker views with provided tag keys
func RegisterDockerViews(tagKeys []string) {
func RegisterDockerViews(tagKeys []string, latencyDist []float64) {
for _, m := range dockerMeasures {
v := createView(m, view.Distribution(), tagKeys)
var dist *view.Aggregation
// Remember these are sampled by docker in short intervals (approx 1 sec)
// Bytes for net/disk/mem
if m.Name() == "docker_stats_net_rx" || m.Name() == "docker_stats_net_tx" {
// net IO: 8k to 32MB
dist = view.Distribution(0, 8192, 65536, 524288, 1048576, 2097152, 4194304, 8388608, 16777216, 33554432)
} else if m.Name() == "docker_stats_disk_read" || m.Name() == "docker_stats_disk_write" {
// disk IO: 8k to 32MB
dist = view.Distribution(0, 8192, 65536, 524288, 1048576, 2097152, 4194304, 8388608, 16777216, 33554432)
} else if m.Name() == "docker_stats_mem_limit" || m.Name() == "docker_stats_mem_usage" {
// memory: 128K to 32MB
dist = view.Distribution(0, 131072, 262144, 524288, 1048576, 2097152, 4194304, 8388608, 16777216, 33554432)
} else if m.Name() == "docker_stats_cpu_user" || m.Name() == "docker_stats_cpu_total" || m.Name() == "docker_stats_cpu_kernel" {
// percentages
dist = view.Distribution(0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100)
} else {
// Not used yet.
dist = view.Distribution(latencyDist...)
}
v := common.CreateView(m, dist, tagKeys)
if err := view.Register(v); err != nil {
logrus.WithError(err).Fatal("cannot register view")
}
@@ -139,13 +164,13 @@ func RegisterDockerViews(tagKeys []string) {
}
// RegisterContainerViews creates and register containers views with provided tag keys
func RegisterContainerViews(tagKeys []string) {
func RegisterContainerViews(tagKeys []string, latencyDist []float64) {
// Create views for container measures
for i, key := range containerGaugeKeys {
if key == "" {
continue
}
v := createView(containerGaugeMeasures[i], view.Count(), tagKeys)
v := common.CreateView(containerGaugeMeasures[i], view.Sum(), tagKeys)
if err := view.Register(v); err != nil {
logrus.WithError(err).Fatal("cannot register view")
}
@@ -155,7 +180,7 @@ func RegisterContainerViews(tagKeys []string) {
if key == "" {
continue
}
v := createView(containerTimeMeasures[i], view.Distribution(), tagKeys)
v := common.CreateView(containerTimeMeasures[i], view.Distribution(latencyDist...), tagKeys)
if err := view.Register(v); err != nil {
logrus.WithError(err).Fatal("cannot register view")
}
@@ -172,7 +197,7 @@ func initDockerMeasures() map[string]*stats.Int64Measure {
if strings.Contains(key, "cpu") {
units = "cpu"
}
measures[key] = makeMeasure("docker_stats_"+key, "docker container stats for "+key, units)
measures[key] = common.MakeMeasure("docker_stats_"+key, "docker container stats for "+key, units)
}
return measures
}
@@ -183,48 +208,19 @@ func initContainerGaugeMeasures() []*stats.Int64Measure {
if key == "" { // leave nil intentionally, let it panic
continue
}
gaugeMeasures[i] = makeMeasure(key, "containers in state "+key, "")
gaugeMeasures[i] = common.MakeMeasure(key, "containers in state "+key, "")
}
return gaugeMeasures
}
func initContainerTimeMeasures() []*stats.Int64Measure {
// TODO(reed): do we have to do this? the measurements will be tagged on the context, will they be propagated
// or we have to white list them in the view for them to show up? test...
timeMeasures := make([]*stats.Int64Measure, len(containerTimeKeys))
for i, key := range containerTimeKeys {
if key == "" {
continue
}
timeMeasures[i] = makeMeasure(key, "time spent in container state "+key, "ms")
timeMeasures[i] = common.MakeMeasure(key, "time spent in container state "+key, "ms")
}
return timeMeasures
}
func createView(measure stats.Measure, agg *view.Aggregation, tagKeys []string) *view.View {
return &view.View{
Name: measure.Name(),
Description: measure.Description(),
Measure: measure,
TagKeys: makeKeys(tagKeys),
Aggregation: agg,
}
}
func makeMeasure(name string, desc string, unit string) *stats.Int64Measure {
return stats.Int64(name, desc, unit)
}
func makeKeys(names []string) []tag.Key {
tagKeys := make([]tag.Key, len(names))
for i, name := range names {
key, err := tag.NewKey(name)
if err != nil {
logrus.Fatal(err)
}
tagKeys[i] = key
}
return tagKeys
}