faas-rs/faas
1
0
Fork 0
mirror of https://github.com/openfaas/faas.git synced 2025-06-19 04:26:35 +00:00
Code Issues Packages Projects Releases Wiki Activity

Extract scaling from zero

Browse Source 
- extracting this package means it can be used in other components
such as the asynchronous nats-queue-worker which may need to
invoke functions which are scaled down to zero replicas.

Ref: https://github.com/openfaas/nats-queue-worker/issues/32

Tested on Docker Swarm for scaling up, already scaled and not
found error.

Signed-off-by: Alex Ellis (VMware) <alexellis2@gmail.com>
This commit is contained in:
Alex Ellis (VMware)
2018-11-01 12:54:17 +00:00
committed by Alex Ellis
parent fb06e299cf
commit 9cea08c728
15 changed files with 208 additions and 125 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
gateway/plugin/external.go
View File

@ -18,12 +18,12 @@ import (
"io/ioutil"
"github.com/openfaas/faas-provider/auth"
"github.com/openfaas/faas/gateway/handlers"
"github.com/openfaas/faas/gateway/requests"
"github.com/openfaas/faas/gateway/scaling"
)
// NewExternalServiceQuery proxies service queries to external plugin via HTTP
func NewExternalServiceQuery(externalURL url.URL, credentials *auth.BasicAuthCredentials) handlers.ServiceQuery {
func NewExternalServiceQuery(externalURL url.URL, credentials *auth.BasicAuthCredentials) scaling.ServiceQuery {
timeout := 3 * time.Second
proxyClient := http.Client{
@ -61,9 +61,9 @@ type ScaleServiceRequest struct {
}
// GetReplicas replica count for function
func (s ExternalServiceQuery) GetReplicas(serviceName string) (handlers.ServiceQueryResponse, error) {
func (s ExternalServiceQuery) GetReplicas(serviceName string) (scaling.ServiceQueryResponse, error) {
var err error
var emptyServiceQueryResponse handlers.ServiceQueryResponse
var emptyServiceQueryResponse scaling.ServiceQueryResponse
function := requests.Function{}
@ -96,17 +96,17 @@ func (s ExternalServiceQuery) GetReplicas(serviceName string) (handlers.ServiceQ
}
}
minReplicas := uint64(handlers.DefaultMinReplicas)
maxReplicas := uint64(handlers.DefaultMaxReplicas)
scalingFactor := uint64(handlers.DefaultScalingFactor)
minReplicas := uint64(scaling.DefaultMinReplicas)
maxReplicas := uint64(scaling.DefaultMaxReplicas)
scalingFactor := uint64(scaling.DefaultScalingFactor)
availableReplicas := function.AvailableReplicas
if function.Labels != nil {
labels := *function.Labels
minReplicas = extractLabelValue(labels[handlers.MinScaleLabel], minReplicas)
maxReplicas = extractLabelValue(labels[handlers.MaxScaleLabel], maxReplicas)
extractedScalingFactor := extractLabelValue(labels[handlers.ScalingFactorLabel], scalingFactor)
minReplicas = extractLabelValue(labels[scaling.MinScaleLabel], minReplicas)
maxReplicas = extractLabelValue(labels[scaling.MaxScaleLabel], maxReplicas)
extractedScalingFactor := extractLabelValue(labels[scaling.ScalingFactorLabel], scalingFactor)
if extractedScalingFactor >= 0 && extractedScalingFactor <= 100 {
scalingFactor = extractedScalingFactor
@ -115,7 +115,7 @@ func (s ExternalServiceQuery) GetReplicas(serviceName string) (handlers.ServiceQ
}
}
return handlers.ServiceQueryResponse{
return scaling.ServiceQueryResponse{
Replicas: function.Replicas,
MaxReplicas: maxReplicas,
MinReplicas: minReplicas,