fix: adjust MeshCircuitBreaker with memo

pkg/plugins/policies/meshcircuitbreaker/api/v1alpha1/meshcircuitbreaker.go

@@ -77,7 +77,7 @@ type ConnectionLimits struct {
 
 type OutlierDetection struct {
 	// When set to true, outlierDetection configuration won't take any effect
-	Disabled bool `json:"disabled,omitempty"`
+	Disabled *bool `json:"disabled,omitempty"`
 	// The time interval between ejection analysis sweeps. This can result in
 	// both new ejections and hosts being returned to service.
 	Interval *k8s.Duration `json:"interval,omitempty"`

pkg/plugins/policies/meshcircuitbreaker/api/v1alpha1/validator.go

@@ -109,15 +109,14 @@ func validateOutlierDetection(path validators.PathBuilder, outlierDetection *Out
 func validateDetectors(path validators.PathBuilder, detectors *Detectors) validators.ValidationError {
 	var verr validators.ValidationError
 	if detectors == nil {
-		verr.AddViolationAt(path, "'detectors' should be configured")
+		verr.AddViolationAt(path, validators.MustBeDefined)
 		return verr
 	}
 
 	if detectors.FailurePercentage == nil && detectors.GatewayFailures == nil &&
 		detectors.LocalOriginFailures == nil && detectors.TotalFailures == nil &&
 		detectors.SuccessRate == nil {
-		verr.AddViolationAt(path, "at least one of the detectors ('totalFailures', 'gatewayFailures',"+
-			" 'localOriginFailures', 'successRate' or 'failurePercentage') should be configured")
+		verr.AddViolationAt(path, validators.MustHaveAtLeastOne("totalFailures", "gatewayFailures", "localOriginFailures", "successRate", "failurePercentage"))
 		return verr
 	}
 

pkg/plugins/policies/meshcircuitbreaker/api/v1alpha1/validator_test.go

@@ -401,6 +401,39 @@ violations:
     message: has to be in [0 - 100] range
   - field: spec.to[0].default.outlierDetection.detectors.failurePercentage.threshold
     message: has to be in [0 - 100] range`}),
+			Entry("detectors are not defined", testCase{
+				inputYaml: `
+targetRef:
+  kind: MeshService
+  name: web-frontend
+to:
+  - targetRef:
+      kind: MeshService
+      name: web-backend
+    default:
+      outlierDetection:
+        maxEjectionPercent: 100`,
+				expected: `
+violations:
+  - field: spec.to[0].default.outlierDetection.detectors
+    message: must be defined`}),
+			Entry("detector is empty", testCase{
+				inputYaml: `
+targetRef:
+  kind: MeshService
+  name: web-frontend
+to:
+  - targetRef:
+      kind: MeshService
+      name: web-backend
+    default:
+      outlierDetection:
+        maxEjectionPercent: 100
+        detectors: {}`,
+				expected: `
+violations:
+  - field: spec.to[0].default.outlierDetection.detectors
+    message: 'must have at least one defined: totalFailures, gatewayFailures, localOriginFailures, successRate, failurePercentage'`}),
 		)
 	})
 })

pkg/plugins/policies/meshcircuitbreaker/plugin/v1alpha1/plugin_test.go

@@ -46,7 +46,7 @@ var _ = Describe("MeshCircuitBreaker", func() {
 
 	genOutlierDetection := func(disabled bool) *api.OutlierDetection {
 		return &api.OutlierDetection{
-			Disabled:                    disabled,
+			Disabled:                    &disabled,
 			Interval:                    test.ParseDuration("10s"),
 			BaseEjectionTime:            test.ParseDuration("8s"),
 			MaxEjectionPercent:          test.PointerOf(uint32(88)),

pkg/plugins/policies/meshcircuitbreaker/plugin/xds/configurer.go

@@ -5,6 +5,7 @@ import (
 	envoy_config_core_v3 "github.com/envoyproxy/go-control-plane/envoy/config/core/v3"
 
 	api "github.com/kumahq/kuma/pkg/plugins/policies/meshcircuitbreaker/api/v1alpha1"
+	"github.com/kumahq/kuma/pkg/util/pointer"
 	util_proto "github.com/kumahq/kuma/pkg/util/proto"
 )
 
@@ -58,7 +59,7 @@ func configureCircuitBreakers(cluster *envoy_cluster.Cluster, conf *api.Connecti
 }
 
 func configureOutlierDetection(cluster *envoy_cluster.Cluster, conf *api.OutlierDetection) {
-	if conf == nil || conf.Disabled {
+	if conf == nil || pointer.Deref(conf.Disabled) {
 		return
 	}