Remove TargetAllocator resource defaults (#2040)

* Remove TargetAllocator resource defaults

* Add changelog entry

* Update e2e test for target allocator

* trigger tests

* Add heads up for change of behaviour

.chloggen/remove_ta_defaults.yaml

@@ -0,0 +1,16 @@
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: enhancement
+
+# The name of the component, or a single word describing the area of concern, (e.g. operator, target allocator, github action)
+component: operator
+
+# A brief description of the change. Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Remove default cpu and mem requests and limits from target allocator to match otel-collector behaviour
+
+# One or more tracking issues related to the change
+issues: [1914]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext: To preserve the old behaviour for the case when the requests/limits were not explicitely set during the deployment, make sure to set the requests/limits of 100m/200m for CPU and 250Mi/500Mi for memory.

apis/v1alpha1/opentelemetrycollector_webhook.go

@@ -18,8 +18,6 @@ import (
 	"fmt"
 
 	autoscalingv2 "k8s.io/api/autoscaling/v2"
-	corev1 "k8s.io/api/core/v1"
-	"k8s.io/apimachinery/pkg/api/resource"
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/util/validation"
 	ctrl "sigs.k8s.io/controller-runtime"
@@ -72,19 +70,6 @@ func (r *OpenTelemetryCollector) Default() {
 		r.Spec.TargetAllocator.Replicas = &one
 	}
 
-	if r.Spec.TargetAllocator.Enabled && r.Spec.TargetAllocator.Resources.Limits == nil {
-		r.Spec.TargetAllocator.Resources.Limits = corev1.ResourceList{
-			corev1.ResourceCPU:    resource.MustParse("200m"),
-			corev1.ResourceMemory: resource.MustParse("500Mi"),
-		}
-	}
-	if r.Spec.TargetAllocator.Enabled && r.Spec.TargetAllocator.Resources.Requests == nil {
-		r.Spec.TargetAllocator.Resources.Requests = corev1.ResourceList{
-			corev1.ResourceCPU:    resource.MustParse("100m"),
-			corev1.ResourceMemory: resource.MustParse("250Mi"),
-		}
-	}
-
 	if r.Spec.MaxReplicas != nil || (r.Spec.Autoscaler != nil && r.Spec.Autoscaler.MaxReplicas != nil) {
 		if r.Spec.Autoscaler == nil {
 			r.Spec.Autoscaler = &AutoscalerSpec{}

tests/e2e/targetallocator-features/00-assert.yaml

@@ -58,13 +58,6 @@ spec:
             valueFrom:
               fieldRef:
                 fieldPath: metadata.namespace
-          resources:
-            limits:
-              cpu: 200m
-              memory: 500Mi
-            requests:
-              cpu: 100m
-              memory: 250Mi
           volumeMounts:
           - mountPath: /conf
             name: ta-internal