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Export new metrics for OpenFaaS Pro scaling

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* Add service target metric
* Add service min replicas metric
* Add scale type metric

These combined allow new auto-scaling modes and parameters
for OpenFaaS Pro customers.

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>
This commit is contained in:
Alex Ellis (OpenFaaS Ltd)
2022-01-24 12:11:54 +00:00
committed by Alex Ellis
parent 34735d61d0
commit d85d5e7239
23 changed files with 235 additions and 472 deletions
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5
gateway/plugin/external.go
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@ -100,12 +100,15 @@ func (s ExternalServiceQuery) GetReplicas(serviceName, serviceNamespace string)
scalingFactor := uint64(scaling.DefaultScalingFactor)
availableReplicas := function.AvailableReplicas
targetLoad := uint64(scaling.DefaultTargetLoad)
if function.Labels != nil {
labels := *function.Labels
minReplicas = extractLabelValue(labels[scaling.MinScaleLabel], minReplicas)
maxReplicas = extractLabelValue(labels[scaling.MaxScaleLabel], maxReplicas)
extractedScalingFactor := extractLabelValue(labels[scaling.ScalingFactorLabel], scalingFactor)
targetLoad = extractLabelValue(labels[scaling.TargetLoadLabel], targetLoad)
if extractedScalingFactor >= 0 && extractedScalingFactor <= 100 {
scalingFactor = extractedScalingFactor
@ -113,6 +116,7 @@ func (s ExternalServiceQuery) GetReplicas(serviceName, serviceNamespace string)
log.Printf("Bad Scaling Factor: %d, is not in range of [0 - 100]. Will fallback to %d", extractedScalingFactor, scalingFactor)
}
}
log.Printf("GetReplicas [%s.%s] took: %fs", serviceName, serviceNamespace, time.Since(start).Seconds())
return scaling.ServiceQueryResponse{
@ -122,6 +126,7 @@ func (s ExternalServiceQuery) GetReplicas(serviceName, serviceNamespace string)
ScalingFactor: scalingFactor,
AvailableReplicas: availableReplicas,
Annotations: function.Annotations,
TargetLoad: targetLoad,
}, err
}