Permission check fixed for the serviceaccount of the target allocator

.chloggen/3380-ta-serviceaccount-check.yaml

@@ -0,0 +1,16 @@
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: bug_fix
+
+# The name of the component, or a single word describing the area of concern, (e.g. collector, target allocator, auto-instrumentation, opamp, github action)
+component: target allocator
+
+# A brief description of the change. Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: "Permission check fixed for the serviceaccount of the target allocator"
+
+# One or more tracking issues related to the change
+issues: [3380]
+
+# (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:

apis/v1alpha1/targetallocator_webhook.go

@@ -119,7 +119,7 @@ func (w TargetAllocatorWebhook) validate(ctx context.Context, ta *TargetAllocato
 
 	// if the prometheusCR is enabled, it needs a suite of permissions to function
 	if ta.Spec.PrometheusCR.Enabled {
-		warnings, err := v1beta1.CheckTargetAllocatorPrometheusCRPolicyRules(ctx, w.reviewer, ta.Spec.ServiceAccount, ta.GetNamespace())
+		warnings, err := v1beta1.CheckTargetAllocatorPrometheusCRPolicyRules(ctx, w.reviewer, ta.GetNamespace(), ta.Spec.ServiceAccount)
 		if err != nil || len(warnings) > 0 {
 			return warnings, err
 		}

apis/v1beta1/collector_webhook.go

@@ -29,6 +29,7 @@ import (
 	"github.com/open-telemetry/opentelemetry-operator/internal/config"
 	"github.com/open-telemetry/opentelemetry-operator/internal/fips"
 	ta "github.com/open-telemetry/opentelemetry-operator/internal/manifests/targetallocator/adapters"
+	"github.com/open-telemetry/opentelemetry-operator/internal/naming"
 	"github.com/open-telemetry/opentelemetry-operator/internal/rbac"
 	"github.com/open-telemetry/opentelemetry-operator/pkg/featuregate"
 )
@@ -341,8 +342,12 @@ func (c CollectorWebhook) validateTargetAllocatorConfig(ctx context.Context, r *
 	}
 	// if the prometheusCR is enabled, it needs a suite of permissions to function
 	if r.Spec.TargetAllocator.PrometheusCR.Enabled {
+		saname := r.Spec.TargetAllocator.ServiceAccount
+		if len(r.Spec.TargetAllocator.ServiceAccount) == 0 {
+			saname = naming.TargetAllocatorServiceAccount(r.Name)
+		}
 		warnings, err := CheckTargetAllocatorPrometheusCRPolicyRules(
-			ctx, c.reviewer, r.Spec.TargetAllocator.ServiceAccount, r.GetNamespace())
+			ctx, c.reviewer, r.GetNamespace(), saname)
 		if err != nil || len(warnings) > 0 {
 			return warnings, err
 		}

apis/v1beta1/targetallocator_rbac.go

@@ -61,8 +61,8 @@ func CheckTargetAllocatorPrometheusCRPolicyRules(
 	serviceAccountName string) (warnings []string, err error) {
 	subjectAccessReviews, err := reviewer.CheckPolicyRules(
 		ctx,
-		namespace,
 		serviceAccountName,
+		namespace,
 		targetAllocatorCRPolicyRules...,
 	)
 	if err != nil {