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Expose Horizontal Pod Autoscaler Behavior and add hpa scaledown test #1077

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merged 17 commits into from
Sep 15, 2022
Merged

Expose Horizontal Pod Autoscaler Behavior and add hpa scaledown test #1077

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f4abf28
Add scaledown test for autoscaling
kevinearls Sep 6, 2022
7b51fee
Fix nits
kevinearls Sep 6, 2022
43710b9
Appease the linter
kevinearls Sep 6, 2022
7070f4b
Don't use a default, only set scaleUp/scaleDown if they are in the CR
kevinearls Sep 6, 2022
ae83264
Removed commented out code
kevinearls Sep 6, 2022
19154be
Change defaults for scaleUp/scaleDown
kevinearls Sep 6, 2022
108d0f1
Update autoscaling scaleup/scaledown
kevinearls Sep 8, 2022
037aa23
Run generate
kevinearls Sep 8, 2022
bdc6eb3
Ran make api-docs
kevinearls Sep 8, 2022
60cdfe7
Update HPA implementation to embed HorizontalPodAutoscalerBehavior
kevinearls Sep 15, 2022
54ff0d3
Merge branch 'main' into add-hpa-scaledown-test
kevinearls Sep 15, 2022
bcf71e7
Only set behavior if it exists in the collector CR
kevinearls Sep 15, 2022
0f8e029
Aded some unit tests
kevinearls Sep 15, 2022
a42084c
Merge branch 'main' into add-hpa-scaledown-test
kevinearls Sep 15, 2022
f3a682c
Merge branch 'main' into add-hpa-scaledown-test
kevinearls Sep 15, 2022
c14096d
Add kuttl assertion that hpa scaled down
kevinearls Sep 15, 2022
89a2f48
added whitespace to rerun tests
kevinearls Sep 15, 2022
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32 changes: 32 additions & 0 deletions apis/v1alpha1/opentelemetrycollector_types.go
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Original file line number Diff line number Diff line change
Expand Up @@ -40,6 +40,13 @@ type OpenTelemetryCollectorSpec struct {
// MaxReplicas sets an upper bound to the autoscaling feature. If MaxReplicas is set autoscaling is enabled.
// +optional
MaxReplicas *int32 `json:"maxReplicas,omitempty"`

// Autoscaler specifies the pod autoscaling configuration to use
// for the OpenTelemetryCollector workload.
//
// +optional
Autoscaler *AutoscalerSpec `json:"autoscaler,omitempty"`
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question: did we consider embedding the HPA spec in here? Or at least embed the autoscaling behavior spec here?

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I was just adding enough code to be able to get an e2e test to work within the time allocated, which means we need to scale down much quicker that the default 300 seconds.

@pavolloffay what do you think? Do I need to add the other values of PA scaling rules here?

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For my use case, I know that I would like to be able to specify policies and not just StabilizationWindowSeconds. Embedding only StabilizationWindowSeconds is going to make it so we need to add in each feature on request, making a code change for each one.


// SecurityContext will be set as the container security context.
// +optional
SecurityContext *v1.SecurityContext `json:"securityContext,omitempty"`
Expand Down Expand Up @@ -195,6 +202,31 @@ type OpenTelemetryCollectorList struct {
Items []OpenTelemetryCollector `json:"items"`
}

// AutoscalerSpec defines the OpenTelemetryCollector's pod autoscaling specification.
type AutoscalerSpec struct {
// +optional
Behavior *AutoscalerBehaviorSpec `json:"behavior,omitempty"`
}

// AutoscalerBehaviorSpec configures the scaling behavior of the target.
type AutoscalerBehaviorSpec struct {
// ScaleUp is the policy for scaling up
// +optional
ScaleUp *AutoScalerRules `json:"scaleUp,omitempty"`

// ScaleDown is policy for scaling down
//
// +optional
ScaleDown *AutoScalerRules `json:"scaleDown,omitempty"`
}

// AutoScalerRules configures the scaling behavior for one direction.
type AutoScalerRules struct {
// +optional
// +kubebuilder:validation:Minimum=0
StabilizationWindowSeconds *int32 `json:"stabilizationWindowSeconds,omitempty"`
}

func init() {
SchemeBuilder.Register(&OpenTelemetryCollector{}, &OpenTelemetryCollectorList{})
}
9 changes: 9 additions & 0 deletions apis/v1alpha1/opentelemetrycollector_webhook.go
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Expand Up @@ -129,6 +129,15 @@ func (r *OpenTelemetryCollector) validateCRDSpec() error {
return fmt.Errorf("the OpenTelemetry Spec autoscale configuration is incorrect, minReplicas should be one or more")
}

if r.Spec.Autoscaler != nil && r.Spec.Autoscaler.Behavior != nil {
if r.Spec.Autoscaler.Behavior.ScaleDown != nil && *r.Spec.Autoscaler.Behavior.ScaleDown.StabilizationWindowSeconds < int32(1) {
return fmt.Errorf("the OpenTelemetry Spec autoscale configuration is incorrect, scaleDown should be one or more")
}

if r.Spec.Autoscaler.Behavior.ScaleUp != nil && *r.Spec.Autoscaler.Behavior.ScaleUp.StabilizationWindowSeconds < int32(1) {
return fmt.Errorf("the OpenTelemetry Spec autoscale configuration is incorrect, scaleUp should be one or more")
}
}
}

return nil
Expand Down
70 changes: 70 additions & 0 deletions apis/v1alpha1/zz_generated.deepcopy.go
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26 changes: 26 additions & 0 deletions bundle/manifests/opentelemetry.io_opentelemetrycollectors.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -59,6 +59,32 @@ spec:
description: Args is the set of arguments to pass to the OpenTelemetry
Collector binary
type: object
autoscaler:
description: Autoscaler specifies the pod autoscaling configuration
to use for the OpenTelemetryCollector workload.
properties:
behavior:
description: AutoscalerBehaviorSpec configures the scaling behavior
of the target
properties:
scaleDown:
description: ScaleDown is policy for scaling down
properties:
stabilizationWindowSeconds:
format: int32
minimum: 0
type: integer
type: object
scaleUp:
description: ScaleUp is the policy for scaling up
properties:
stabilizationWindowSeconds:
format: int32
minimum: 0
type: integer
type: object
type: object
type: object
config:
description: Config is the raw JSON to be used as the collector's
configuration. Refer to the OpenTelemetry Collector documentation
Expand Down
26 changes: 26 additions & 0 deletions config/crd/bases/opentelemetry.io_opentelemetrycollectors.yaml
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Expand Up @@ -57,6 +57,32 @@ spec:
description: Args is the set of arguments to pass to the OpenTelemetry
Collector binary
type: object
autoscaler:
description: Autoscaler specifies the pod autoscaling configuration
to use for the OpenTelemetryCollector workload.
properties:
behavior:
description: AutoscalerBehaviorSpec configures the scaling behavior
of the target
properties:
scaleDown:
description: ScaleDown is policy for scaling down
properties:
stabilizationWindowSeconds:
format: int32
minimum: 0
type: integer
type: object
scaleUp:
description: ScaleUp is the policy for scaling up
properties:
stabilizationWindowSeconds:
format: int32
minimum: 0
type: integer
type: object
type: object
type: object
config:
description: Config is the raw JSON to be used as the collector's
configuration. Refer to the OpenTelemetry Collector documentation
Expand Down
128 changes: 128 additions & 0 deletions docs/api.md
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Expand Up @@ -1691,6 +1691,13 @@ OpenTelemetryCollectorSpec defines the desired state of OpenTelemetryCollector.
Args is the set of arguments to pass to the OpenTelemetry Collector binary<br/>
</td>
<td>false</td>
</tr><tr>
<td><b><a href="#opentelemetrycollectorspecautoscaler">autoscaler</a></b></td>
<td>object</td>
<td>
Autoscaler specifies the pod autoscaling configuration to use for the OpenTelemetryCollector workload.<br/>
</td>
<td>false</td>
</tr><tr>
<td><b>config</b></td>
<td>string</td>
Expand Down Expand Up @@ -1866,6 +1873,127 @@ OpenTelemetryCollectorSpec defines the desired state of OpenTelemetryCollector.
</table>


### OpenTelemetryCollector.spec.autoscaler
<sup><sup>[↩ Parent](#opentelemetrycollectorspec)</sup></sup>



Autoscaler specifies the pod autoscaling configuration to use for the OpenTelemetryCollector workload.

<table>
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th>Description</th>
<th>Required</th>
</tr>
</thead>
<tbody><tr>
<td><b><a href="#opentelemetrycollectorspecautoscalerbehavior">behavior</a></b></td>
<td>object</td>
<td>
AutoscalerBehaviorSpec configures the scaling behavior of the target<br/>
</td>
<td>false</td>
</tr></tbody>
</table>


### OpenTelemetryCollector.spec.autoscaler.behavior
<sup><sup>[↩ Parent](#opentelemetrycollectorspecautoscaler)</sup></sup>



AutoscalerBehaviorSpec configures the scaling behavior of the target

<table>
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th>Description</th>
<th>Required</th>
</tr>
</thead>
<tbody><tr>
<td><b><a href="#opentelemetrycollectorspecautoscalerbehaviorscaledown">scaleDown</a></b></td>
<td>object</td>
<td>
ScaleDown is policy for scaling down<br/>
</td>
<td>false</td>
</tr><tr>
<td><b><a href="#opentelemetrycollectorspecautoscalerbehaviorscaleup">scaleUp</a></b></td>
<td>object</td>
<td>
ScaleUp is the policy for scaling up<br/>
</td>
<td>false</td>
</tr></tbody>
</table>


### OpenTelemetryCollector.spec.autoscaler.behavior.scaleDown
<sup><sup>[↩ Parent](#opentelemetrycollectorspecautoscalerbehavior)</sup></sup>



ScaleDown is policy for scaling down

<table>
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th>Description</th>
<th>Required</th>
</tr>
</thead>
<tbody><tr>
<td><b>stabilizationWindowSeconds</b></td>
<td>integer</td>
<td>
<br/>
<br/>
<i>Format</i>: int32<br/>
<i>Minimum</i>: 0<br/>
</td>
<td>false</td>
</tr></tbody>
</table>


### OpenTelemetryCollector.spec.autoscaler.behavior.scaleUp
<sup><sup>[↩ Parent](#opentelemetrycollectorspecautoscalerbehavior)</sup></sup>



ScaleUp is the policy for scaling up

<table>
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th>Description</th>
<th>Required</th>
</tr>
</thead>
<tbody><tr>
<td><b>stabilizationWindowSeconds</b></td>
<td>integer</td>
<td>
<br/>
<br/>
<i>Format</i>: int32<br/>
<i>Minimum</i>: 0<br/>
</td>
<td>false</td>
</tr></tbody>
</table>


### OpenTelemetryCollector.spec.env[index]
<sup><sup>[↩ Parent](#opentelemetrycollectorspec)</sup></sup>

Expand Down
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