Add validation on Session Affinity Config

pkg/i2gw/providers/gce/extensions/input_extensions.go

@@ -17,10 +17,19 @@ limitations under the License.
 package extensions
 
 import (
+	"fmt"
+
 	"github.com/kubernetes-sigs/ingress2gateway/pkg/i2gw/intermediate"
 	backendconfigv1 "k8s.io/ingress-gce/pkg/apis/backendconfig/v1"
 )
 
+func ValidateBeConfig(beConfig *backendconfigv1.BackendConfig) error {
+	if beConfig.Spec.SessionAffinity.AffinityCookieTtlSec != nil && beConfig.Spec.SessionAffinity.AffinityType != "GENERATED_COOKIE" {
+		return fmt.Errorf("BackendConfig has affinityCookieTtlSec set, but affinityType is not GENERATED_COOKIE")
+	}
+	return nil
+}
+
 func BuildIRSessionAffinityConfig(beConfig *backendconfigv1.BackendConfig) *intermediate.SessionAffinityConfig {
 	return &intermediate.SessionAffinityConfig{
 		AffinityType: beConfig.Spec.SessionAffinity.AffinityType,

pkg/i2gw/providers/gce/gce_extensions.go

@@ -45,6 +45,10 @@ func buildGceServiceIR(ctx context.Context, storage *storage, ir *intermediate.I
 		if beConfig == nil {
 			continue
 		}
+		if err := extensions.ValidateBeConfig(beConfig); err != nil {
+			notify(notifications.ErrorNotification, err.Error(), beConfig)
+			continue
+		}
 		gceServiceIR := beConfigToGceServiceIR(beConfig)
 		services := beConfigToSvcs[beConfigKey]
 		for _, svcKey := range services {