Enable legacy scaling for openfaas Pro users

If desired, openfaasPro=true + ceScaling=true followed by
proScaler.enabled=false will give the alert-manager style
of auto-scaling to Pro users.

For the new scaler, simply set openfaasPro to true and
proScaler.enabled=true.

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <[email protected]>

Author: alexellis

chart/openfaas/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v2
 type: application
 description: OpenFaaS - Serverless Functions Made Simple
 name: openfaas
-version: 10.0.2
+version: 10.0.3
 sources:
 - https://github.com/openfaas/faas
 - https://github.com/openfaas/faas-netes

chart/openfaas/templates/prometheus-cfg.yaml

@@ -128,7 +128,7 @@ data:
         rules:
         - alert: service_down
           expr: up == 0
-{{- if eq .Values.openfaasPro false }}
+{{- if or (eq .Values.openfaasPro false) (eq .Values.ceScaling true) }}
         - alert: APIHighInvocationRate
           expr: sum(rate(gateway_function_invocation_total{code="200"}[10s])) BY (function_name) > 5
           for: 5s

chart/openfaas/values.yaml

@@ -12,9 +12,14 @@ clusterRole: false            # Set to true for multiple namespaces
 createCRDs: true
 basic_auth: true
 generateBasicAuth: false
-
 securityContext: true
 
+# Set to true to use legacy / community-edition auto-scaling
+# when openfaasPro is set to true to use the original 
+# auto-scaling logic
+# Then set proScaler.enabled=false
+ceScaling: false
+
 # create pod security policies for OpenFaaS control plane
 # https://kubernetes.io/docs/concepts/policy/pod-security-policy/
 psp: false