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load-scheduler-variants.go
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load-scheduler-variants.go
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package loadscheduler
import (
policylangv1 "github.com/fluxninja/aperture/v2/api/gen/proto/go/aperture/policy/language/v1"
"github.com/fluxninja/aperture/v2/pkg/policies/controlplane/components"
)
func prepareLoadSchedulerCommonComponents() *policylangv1.NestedCircuit {
nestedCircuit := &policylangv1.NestedCircuit{
Components: []*policylangv1.Component{
{
Component: &policylangv1.Component_FirstValid{
FirstValid: &policylangv1.FirstValid{
InPorts: &policylangv1.FirstValid_Ins{
Inputs: []*policylangv1.InPort{
{
Value: &policylangv1.InPort_SignalName{
SignalName: "OVERLOAD_CONFIRMATION",
},
},
{
Value: &policylangv1.InPort_ConstantSignal{
ConstantSignal: &policylangv1.ConstantSignal{
Const: &policylangv1.ConstantSignal_Value{
// Overload confirmation is assumed true by default. This allows the circuit to function even if
// overload confirmation is not provided. If the required behavior is to assume false by default,
// the policy needs to ensure a valid signal with the desired defaults is provided.
Value: 1,
},
},
},
},
},
},
OutPorts: &policylangv1.FirstValid_Outs{
Output: &policylangv1.OutPort{
SignalName: "OVERLOAD_CONFIRMATION_WITH_DEFAULT",
},
},
},
},
},
{
Component: &policylangv1.Component_And{
And: &policylangv1.And{
InPorts: &policylangv1.And_Ins{
Inputs: []*policylangv1.InPort{
{
Value: &policylangv1.InPort_SignalName{
SignalName: "OVERLOAD_FROM_STRATEGY",
},
},
{
Value: &policylangv1.InPort_SignalName{
SignalName: "OVERLOAD_CONFIRMATION_WITH_DEFAULT",
},
},
},
},
OutPorts: &policylangv1.And_Outs{
Output: &policylangv1.OutPort{
SignalName: "IS_OVERLOAD",
},
},
},
},
},
{
Component: &policylangv1.Component_Switcher{
Switcher: &policylangv1.Switcher{
InPorts: &policylangv1.Switcher_Ins{
Switch: &policylangv1.InPort{
Value: &policylangv1.InPort_SignalName{
SignalName: "PASS_THROUGH_FROM_STRATEGY",
},
},
OnSignal: &policylangv1.InPort{
Value: &policylangv1.InPort_ConstantSignal{
ConstantSignal: &policylangv1.ConstantSignal{
Const: &policylangv1.ConstantSignal_SpecialValue{
SpecialValue: "NaN",
},
},
},
},
OffSignal: &policylangv1.InPort{
Value: &policylangv1.InPort_SignalName{
SignalName: "LOAD_MULTIPLIER_FROM_STRATEGY",
},
},
},
OutPorts: &policylangv1.Switcher_Outs{
Output: &policylangv1.OutPort{
SignalName: "DESIRED_LOAD_MULTIPLIER",
},
},
},
},
},
{
Component: &policylangv1.Component_Decider{
Decider: &policylangv1.Decider{
InPorts: &policylangv1.Decider_Ins{
Lhs: &policylangv1.InPort{
Value: &policylangv1.InPort_SignalName{
SignalName: "DESIRED_LOAD_MULTIPLIER",
},
},
Rhs: &policylangv1.InPort{
Value: &policylangv1.InPort_ConstantSignal{
ConstantSignal: &policylangv1.ConstantSignal{
Const: &policylangv1.ConstantSignal_Value{
Value: 1,
},
},
},
},
},
Operator: components.LT.String(),
OutPorts: &policylangv1.Decider_Outs{
Output: &policylangv1.OutPort{
SignalName: "LOAD_MULTIPLIER_ALERT",
},
},
},
},
},
},
}
return nestedCircuit
}