Fix ServiceAccount naming for target allocator (#2445)

.chloggen/fix_ta-serviceaccount.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. operator, target allocator, 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: Fix ServiceAccount naming for target allocator
+
+# One or more tracking issues related to the change
+issues: [2443]
+
+# (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:

internal/manifests/targetallocator/serviceaccount.go

@@ -27,14 +27,18 @@ import (
 // ServiceAccountName returns the name of the existing or self-provisioned service account to use for the given instance.
 func ServiceAccountName(instance v1alpha1.OpenTelemetryCollector) string {
 	if len(instance.Spec.TargetAllocator.ServiceAccount) == 0 {
-		return naming.ServiceAccount(instance.Name)
+		return naming.TargetAllocatorServiceAccount(instance.Name)
 	}
 
 	return instance.Spec.TargetAllocator.ServiceAccount
 }
 
 // ServiceAccount returns the service account for the given instance.
 func ServiceAccount(params manifests.Params) *corev1.ServiceAccount {
+	if len(params.OtelCol.Spec.TargetAllocator.ServiceAccount) > 0 {
+		return nil
+	}
+
 	name := naming.TargetAllocatorServiceAccount(params.OtelCol.Name)
 	labels := Labels(params.OtelCol, name)
 

internal/manifests/targetallocator/serviceaccount_test.go

@@ -18,12 +18,14 @@ import (
 	"testing"
 
 	"github.com/stretchr/testify/assert"
+	corev1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 
 	"github.com/open-telemetry/opentelemetry-operator/apis/v1alpha1"
+	"github.com/open-telemetry/opentelemetry-operator/internal/manifests"
 )
 
-func TestServiceAccountNewDefault(t *testing.T) {
+func TestServiceAccountDefaultName(t *testing.T) {
 	// prepare
 	otelcol := v1alpha1.OpenTelemetryCollector{
 		ObjectMeta: metav1.ObjectMeta{
@@ -32,13 +34,13 @@ func TestServiceAccountNewDefault(t *testing.T) {
 	}
 
 	// test
-	sa := ServiceAccountName(otelcol)
+	saName := ServiceAccountName(otelcol)
 
 	// verify
-	assert.Equal(t, "my-instance-collector", sa)
+	assert.Equal(t, "my-instance-targetallocator", saName)
 }
 
-func TestServiceAccountOverride(t *testing.T) {
+func TestServiceAccountOverrideName(t *testing.T) {
 	// prepare
 	otelcol := v1alpha1.OpenTelemetryCollector{
 		ObjectMeta: metav1.ObjectMeta{
@@ -57,3 +59,45 @@ func TestServiceAccountOverride(t *testing.T) {
 	// verify
 	assert.Equal(t, "my-special-sa", sa)
 }
+
+func TestServiceAccountDefault(t *testing.T) {
+	params := manifests.Params{
+		OtelCol: v1alpha1.OpenTelemetryCollector{
+			ObjectMeta: metav1.ObjectMeta{
+				Name: "my-instance",
+			},
+		},
+	}
+	expected := &corev1.ServiceAccount{
+		ObjectMeta: metav1.ObjectMeta{
+			Name:        "my-instance-targetallocator",
+			Namespace:   params.OtelCol.Namespace,
+			Labels:      Labels(params.OtelCol, "my-instance-targetallocator"),
+			Annotations: params.OtelCol.Annotations,
+		},
+	}
+
+	saName := ServiceAccountName(params.OtelCol)
+	sa := ServiceAccount(params)
+
+	assert.Equal(t, sa.Name, saName)
+	assert.Equal(t, expected, sa)
+}
+
+func TestServiceAccountOverride(t *testing.T) {
+	params := manifests.Params{
+		OtelCol: v1alpha1.OpenTelemetryCollector{
+			ObjectMeta: metav1.ObjectMeta{
+				Name: "my-instance",
+			},
+			Spec: v1alpha1.OpenTelemetryCollectorSpec{
+				TargetAllocator: v1alpha1.OpenTelemetryTargetAllocator{
+					ServiceAccount: "my-special-sa",
+				},
+			},
+		},
+	}
+	sa := ServiceAccount(params)
+
+	assert.Nil(t, sa)
+}