Add request redirect and mirror filters functionality

adapter/internal/oasparser/constants/constants.go

@@ -137,6 +137,8 @@ const (
  KindAPIPolicy = "APIPolicy"
  KindScope = "Scope"
  KindRateLimitPolicy = "RateLimitPolicy"
+ KindService = "Service"
+ KindBackend = "Backend"
 )
 
 // API environment types

adapter/internal/oasparser/envoyconf/routes_configs.go

@@ -128,7 +128,7 @@ func generateRouteAction(apiType string, routeConfig *model.EndpointConfig, rate
  return action
 }
 
-func generateRequestRedirectRoute(route string, policyParams interface{}) (action *routev3.Route_Redirect) {
+func generateRequestRedirectRoute(route string, policyParams interface{}) (*routev3.Route_Redirect, error) {
  policyParameters, _ := policyParams.(map[string]interface{})
  scheme, _ := policyParameters[constants.RedirectScheme].(string)
  hostname, _ := policyParameters[constants.RedirectHostname].(string)
@@ -137,10 +137,10 @@ func generateRequestRedirectRoute(route string, policyParams interface{}) (actio
  replaceFullPath, _ := policyParameters[constants.RedirectPath].(string)
  redirectActionStatusCode := mapStatusCodeToEnum(statusCode)
  if redirectActionStatusCode == -1 {
- _ = fmt.Errorf("Invalid status code provided")
+ return nil, fmt.Errorf("Invalid status code provided")
  }
 
- action = &routev3.Route_Redirect{
+ action := &routev3.Route_Redirect{
  Redirect: &routev3.RedirectAction{
  SchemeRewriteSpecifier: &routev3.RedirectAction_HttpsRedirect{
  HttpsRedirect: scheme == "https",
@@ -153,7 +153,7 @@ func generateRequestRedirectRoute(route string, policyParams interface{}) (actio
  ResponseCode: routev3.RedirectAction_RedirectResponseCode(redirectActionStatusCode),
  },
  }
- return action
+ return action, nil
 }
 
 func mapStatusCodeToEnum(statusCode int) int {
@@ -162,12 +162,6 @@ func mapStatusCodeToEnum(statusCode int) int {
  return 0
  case 302:
  return 1
- case 303:
- return 2
- case 307:
- return 3
- case 308:
- return 4
  default:
  return -1
  }

adapter/internal/oasparser/envoyconf/routes_with_clusters.go

@@ -224,29 +224,31 @@ func CreateRoutesWithClusters(adapterInternalAPI *model.AdapterInternalAPI, inte
 
  // Creating clusters for request mirroring endpoints
  for _, op := range resource.GetOperations() {
- if op.GetMirrorEndpoints() != nil && len(op.GetMirrorEndpoints().Endpoints) > 0 {
- mirrorEndpointCluster := op.GetMirrorEndpoints()
- for _, mirrorEndpoint := range mirrorEndpointCluster.Endpoints {
- mirrorBasepath := strings.TrimSuffix(mirrorEndpoint.Basepath, "/")
- existingMirrorClusterName := getExistingClusterName(*mirrorEndpointCluster, processedEndpoints)
- var mirrorClusterName string
- if existingMirrorClusterName == "" {
- mirrorClusterName = getClusterName(mirrorEndpointCluster.EndpointPrefix, organizationID, vHost, adapterInternalAPI.GetTitle(), apiVersion, resource.GetID())
- mirrorCluster, mirrorAddress, err := processEndpoints(mirrorClusterName, mirrorEndpointCluster, timeout, mirrorBasepath)
- if err != nil {
- logger.LoggerOasparser.ErrorC(logging.PrintError(logging.Error2239, logging.MAJOR, "Error while adding resource level mirror filter endpoints for %s:%v-%v. %v", apiTitle, apiVersion, resourcePath, err.Error()))
+ if op.GetMirrorEndpointClusters() != nil && len(op.GetMirrorEndpointClusters()) > 0 {
+ mirrorEndpointClusters := op.GetMirrorEndpointClusters()
+ for _, mirrorEndpointCluster := range mirrorEndpointClusters {
+ for _, mirrorEndpoint := range mirrorEndpointCluster.Endpoints {
+ mirrorBasepath := strings.TrimSuffix(mirrorEndpoint.Basepath, "/")
+ existingMirrorClusterName := getExistingClusterName(*mirrorEndpointCluster, processedEndpoints)
+ var mirrorClusterName string
+ if existingMirrorClusterName == "" {
+ mirrorClusterName = getClusterName(mirrorEndpointCluster.EndpointPrefix, organizationID, vHost, adapterInternalAPI.GetTitle(), apiVersion, op.GetID())
+ mirrorCluster, mirrorAddress, err := processEndpoints(mirrorClusterName, mirrorEndpointCluster, timeout, mirrorBasepath)
+ if err != nil {
+ logger.LoggerOasparser.ErrorC(logging.PrintError(logging.Error2239, logging.MAJOR, "Error while adding resource level mirror filter endpoints for %s:%v-%v. %v", apiTitle, apiVersion, resourcePath, err.Error()))
+ } else {
+ clusters = append(clusters, mirrorCluster)
+ endpoints = append(endpoints, mirrorAddress...)
+ processedEndpoints[mirrorClusterName] = *mirrorEndpointCluster
+ }
  } else {
- clusters = append(clusters, mirrorCluster)
- endpoints = append(endpoints, mirrorAddress...)
- processedEndpoints[mirrorClusterName] = *mirrorEndpointCluster
+ mirrorClusterName = existingMirrorClusterName
  }
- } else {
- mirrorClusterName = existingMirrorClusterName
- }
- if _, exists := mirrorClusterNames[op.GetID()]; !exists {
- mirrorClusterNames[op.GetID()] = []string{}
+ if _, exists := mirrorClusterNames[op.GetID()]; !exists {
+ mirrorClusterNames[op.GetID()] = []string{}
+ }
+ mirrorClusterNames[op.GetID()] = append(mirrorClusterNames[op.GetID()], mirrorClusterName)
  }
- mirrorClusterNames[op.GetID()] = append(mirrorClusterNames[op.GetID()], mirrorClusterName)
  }
  }
  }
@@ -998,7 +1000,10 @@ func createRoutes(params *routeCreateParams) (routes []*routev3.Route, err error
  case constants.ActionRedirectRequest:
  logger.LoggerOasparser.Debugf("Adding %s policy to request flow for %s %s",
  constants.ActionRedirectRequest, resourcePath, operation.GetMethod())
- requestRedirectAction = generateRequestRedirectRoute(resourcePath, requestPolicy.Parameters)
+ requestRedirectAction, err = generateRequestRedirectRoute(resourcePath, requestPolicy.Parameters)
+ if err != nil {
+ return nil, err
+ }
  }
  }
 

adapter/internal/oasparser/model/adapter_internal_api.go

@@ -487,8 +487,9 @@ func (adapterInternalAPI *AdapterInternalAPI) SetInfoHTTPRouteCR(httpRoute *gwap
  var baseIntervalInMillis uint32
  hasURLRewritePolicy := false
  hasRequestRedirectPolicy := false
- var mirrorEndpointsList []Endpoint
  var securityConfig []EndpointSecurity
+ var mirrorEndpointClusters []*EndpointCluster
+
  backendBasePath := ""
  for _, backend := range rule.BackendRefs {
  backendName := types.NamespacedName{
@@ -702,21 +703,101 @@ func (adapterInternalAPI *AdapterInternalAPI) SetInfoHTTPRouteCR(httpRoute *gwap
  })
 
  case gwapiv1.HTTPRouteFilterRequestMirror:
+ var mirrorTimeoutInMillis uint32
+ var mirrorIdleTimeoutInSeconds uint32
+ var mirrorCircuitBreaker *dpv1alpha1.CircuitBreaker
+ var mirrorHealthCheck *dpv1alpha1.HealthCheck
+ isMirrorRetryConfig := false
+ isMirrorRouteTimeout := false
+ var mirrorBackendRetryCount uint32
+ var mirrorStatusCodes []uint32
+ mirrorStatusCodes = append(mirrorStatusCodes, config.Envoy.Upstream.Retry.StatusCodes...)
+ var mirrorBaseIntervalInMillis uint32
  policyParameters := make(map[string]interface{})
- backend := &filter.RequestMirror.BackendRef
- backendName := types.NamespacedName{
- Name: string(backend.Name),
- Namespace: utils.GetNamespace(backend.Namespace, httpRoute.Namespace),
+ mirrorBackend := &filter.RequestMirror.BackendRef
+ mirrorBackendName := types.NamespacedName{
+ Name: string(mirrorBackend.Name),
+ Namespace: utils.GetNamespace(mirrorBackend.Namespace, httpRoute.Namespace),
  }
- _, ok := resourceParams.BackendMapping[backendName.String()]
- if !ok {
- return fmt.Errorf("backend: %s has not been resolved", backendName)
+ resolvedMirrorBackend, ok := resourceParams.BackendMapping[mirrorBackendName.String()]
+
+ if ok {
+ if resolvedMirrorBackend.CircuitBreaker != nil {
+ mirrorCircuitBreaker = &dpv1alpha1.CircuitBreaker{
+ MaxConnections: resolvedMirrorBackend.CircuitBreaker.MaxConnections,
+ MaxPendingRequests: resolvedMirrorBackend.CircuitBreaker.MaxPendingRequests,
+ MaxRequests: resolvedMirrorBackend.CircuitBreaker.MaxRequests,
+ MaxRetries: resolvedMirrorBackend.CircuitBreaker.MaxRetries,
+ MaxConnectionPools: resolvedMirrorBackend.CircuitBreaker.MaxConnectionPools,
+ }
+ }
+
+ if resolvedMirrorBackend.Timeout != nil {
+ isMirrorRouteTimeout = true
+ mirrorTimeoutInMillis = resolvedMirrorBackend.Timeout.UpstreamResponseTimeout * 1000
+ mirrorIdleTimeoutInSeconds = resolvedMirrorBackend.Timeout.DownstreamRequestIdleTimeout
+ }
+
+ if resolvedMirrorBackend.Retry != nil {
+ isMirrorRetryConfig = true
+ mirrorBackendRetryCount = resolvedMirrorBackend.Retry.Count
+ mirrorBaseIntervalInMillis = resolvedMirrorBackend.Retry.BaseIntervalMillis
+ if len(resolvedMirrorBackend.Retry.StatusCodes) > 0 {
+ mirrorStatusCodes = resolvedMirrorBackend.Retry.StatusCodes
+ }
+ }
+
+ if resolvedMirrorBackend.HealthCheck != nil {
+ mirrorHealthCheck = &dpv1alpha1.HealthCheck{
+ Interval: resolvedMirrorBackend.HealthCheck.Interval,
+ Timeout: resolvedMirrorBackend.HealthCheck.Timeout,
+ UnhealthyThreshold: resolvedMirrorBackend.HealthCheck.UnhealthyThreshold,
+ HealthyThreshold: resolvedMirrorBackend.HealthCheck.HealthyThreshold,
+ }
+ }
+ } else {
+ return fmt.Errorf("backend: %s has not been resolved", mirrorBackendName)
  }
- mirrorEndpoints := GetEndpoints(backendName, resourceParams.BackendMapping)
+
+ mirrorEndpoints := GetEndpoints(mirrorBackendName, resourceParams.BackendMapping)
  if len(mirrorEndpoints) > 0 {
- policyParameters["endpoints"] = mirrorEndpoints
+ mirrorEndpointCluster := &EndpointCluster{
+ Endpoints: mirrorEndpoints,
+ }
+ mirrorEndpointConfig := &EndpointConfig{}
+ if isMirrorRouteTimeout {
+ mirrorEndpointConfig.TimeoutInMillis = mirrorTimeoutInMillis
+ mirrorEndpointConfig.IdleTimeoutInSeconds = mirrorIdleTimeoutInSeconds
+ }
+ if mirrorCircuitBreaker != nil {
+ mirrorEndpointConfig.CircuitBreakers = &CircuitBreakers{
+ MaxConnections: int32(mirrorCircuitBreaker.MaxConnections),
+ MaxRequests: int32(mirrorCircuitBreaker.MaxRequests),
+ MaxPendingRequests: int32(mirrorCircuitBreaker.MaxPendingRequests),
+ MaxRetries: int32(mirrorCircuitBreaker.MaxRetries),
+ MaxConnectionPools: int32(mirrorCircuitBreaker.MaxConnectionPools),
+ }
+ }
+ if isMirrorRetryConfig {
+ mirrorEndpointConfig.RetryConfig = &RetryConfig{
+ Count: int32(mirrorBackendRetryCount),
+ StatusCodes: mirrorStatusCodes,
+ BaseIntervalInMillis: int32(mirrorBaseIntervalInMillis),
+ }
+ }
+ if mirrorHealthCheck != nil {
+ mirrorEndpointCluster.HealthCheck = &HealthCheck{
+ Interval: mirrorHealthCheck.Interval,
+ Timeout: mirrorHealthCheck.Timeout,
+ UnhealthyThreshold: mirrorHealthCheck.UnhealthyThreshold,
+ HealthyThreshold: mirrorHealthCheck.HealthyThreshold,
+ }
+ }
+ if isMirrorRouteTimeout || mirrorCircuitBreaker != nil || mirrorHealthCheck != nil || isMirrorRetryConfig {
+ mirrorEndpointCluster.Config = mirrorEndpointConfig
+ }
+ mirrorEndpointClusters = append(mirrorEndpointClusters, mirrorEndpointCluster)
  }
- mirrorEndpointsList = append(mirrorEndpointsList, mirrorEndpoints...)
  policies.Request = append(policies.Request, Policy{
  PolicyName: string(gwapiv1.HTTPRouteFilterRequestMirror),
  Action: constants.ActionMirrorRequest,
@@ -732,10 +813,6 @@ func (adapterInternalAPI *AdapterInternalAPI) SetInfoHTTPRouteCR(httpRoute *gwap
  loggers.LoggerOasparser.Debugf("Calculating auths for API ..., API_UUID = %v", adapterInternalAPI.UUID)
  apiAuth := getSecurity(resourceAuthScheme)
 
- if !hasRequestRedirectPolicy && len(rule.BackendRefs) < 1 {
- return fmt.Errorf("no backendref were provided")
- }
-
  for _, match := range rule.Matches {
  if hasURLRewritePolicy && hasRequestRedirectPolicy {
  return fmt.Errorf("cannot have URL Rewrite and Request Redirect under the same rule")
@@ -756,14 +833,9 @@ func (adapterInternalAPI *AdapterInternalAPI) SetInfoHTTPRouteCR(httpRoute *gwap
  })
  }
  resourcePath := adapterInternalAPI.xWso2Basepath + *match.Path.Value
- var mirrorEndpointCluster *EndpointCluster
- if len(mirrorEndpointsList) > 0 {
- mirrorEndpointCluster = &EndpointCluster{
- Endpoints: mirrorEndpointsList,
- }
- }
+
  operations := getAllowedOperations(match.Method, policies, apiAuth,
- parseRateLimitPolicyToInternal(resourceRatelimitPolicy), scopes, mirrorEndpointCluster)
+ parseRateLimitPolicyToInternal(resourceRatelimitPolicy), scopes, mirrorEndpointClusters)
  resource := &Resource{path: resourcePath,
  methods: operations,
  pathMatchType: *match.Path.Type,

adapter/internal/oasparser/model/api_operation.go

@@ -35,15 +35,15 @@ type Operation struct {
  iD string
  method string
  //security map of security scheme names -> list of scopes
- scopes []string
- auth *Authentication
- tier string
- disableSecurity bool
- vendorExtensions map[string]interface{}
- policies OperationPolicies
- mockedAPIConfig *api.MockedApiConfig
- rateLimitPolicy *RateLimitPolicy
- mirrorEndpoints *EndpointCluster
+ scopes  []string
+ auth  *Authentication
+ tier  string
+ disableSecurity  bool
+ vendorExtensions  map[string]interface{}
+ policies  OperationPolicies
+ mockedAPIConfig  *api.MockedApiConfig
+ rateLimitPolicy  *RateLimitPolicy
+ mirrorEndpointClusters []*EndpointCluster
 }
 
 // Authentication holds authentication related configurations
@@ -126,9 +126,9 @@ func (operation *Operation) GetID() string {
  return operation.iD
 }
 
-// GetMirrorEndpoints returns the endpoints if a mirror filter has been applied.
-func (operation *Operation) GetMirrorEndpoints() *EndpointCluster {
- return operation.mirrorEndpoints
+// GetMirrorEndpointClusters returns the endpoints if a mirror filter has been applied.
+func (operation *Operation) GetMirrorEndpointClusters() []*EndpointCluster {
+ return operation.mirrorEndpointClusters
 }
 
 // GetCallInterceptorService returns the interceptor configs for a given operation.

adapter/internal/oasparser/model/http_route.go

@@ -287,26 +287,25 @@ func getSecurity(authScheme *dpv1alpha2.Authentication) *Authentication {
 
 // getAllowedOperations retuns a list of allowed operatons, if httpMethod is not specified then all methods are allowed.
 func getAllowedOperations(httpMethod *gwapiv1.HTTPMethod, policies OperationPolicies, auth *Authentication,
- ratelimitPolicy *RateLimitPolicy, scopes []string, mirrorEndpoints *EndpointCluster) []*Operation {
+ ratelimitPolicy *RateLimitPolicy, scopes []string, mirrorEndpointClusters []*EndpointCluster) []*Operation {
  if httpMethod != nil {
  return []*Operation{{iD: uuid.New().String(), method: string(*httpMethod), policies: policies,
- auth: auth, rateLimitPolicy: ratelimitPolicy, scopes: scopes, mirrorEndpoints: mirrorEndpoints}}
-
+ auth: auth, rateLimitPolicy: ratelimitPolicy, scopes: scopes, mirrorEndpointClusters: mirrorEndpointClusters}}
  }
  return []*Operation{{iD: uuid.New().String(), method: string(gwapiv1.HTTPMethodGet), policies: policies,
  auth: auth, rateLimitPolicy: ratelimitPolicy, scopes: scopes},
  {iD: uuid.New().String(), method: string(gwapiv1.HTTPMethodPost), policies: policies,
- auth: auth, rateLimitPolicy: ratelimitPolicy, scopes: scopes, mirrorEndpoints: mirrorEndpoints},
+ auth: auth, rateLimitPolicy: ratelimitPolicy, scopes: scopes, mirrorEndpointClusters: mirrorEndpointClusters},
  {iD: uuid.New().String(), method: string(gwapiv1.HTTPMethodDelete), policies: policies,
- auth: auth, rateLimitPolicy: ratelimitPolicy, scopes: scopes, mirrorEndpoints: mirrorEndpoints},
+ auth: auth, rateLimitPolicy: ratelimitPolicy, scopes: scopes, mirrorEndpointClusters: mirrorEndpointClusters},
  {iD: uuid.New().String(), method: string(gwapiv1.HTTPMethodPatch), policies: policies,
- auth: auth, rateLimitPolicy: ratelimitPolicy, scopes: scopes, mirrorEndpoints: mirrorEndpoints},
+ auth: auth, rateLimitPolicy: ratelimitPolicy, scopes: scopes, mirrorEndpointClusters: mirrorEndpointClusters},
  {iD: uuid.New().String(), method: string(gwapiv1.HTTPMethodPut), policies: policies,
- auth: auth, rateLimitPolicy: ratelimitPolicy, scopes: scopes, mirrorEndpoints: mirrorEndpoints},
+ auth: auth, rateLimitPolicy: ratelimitPolicy, scopes: scopes, mirrorEndpointClusters: mirrorEndpointClusters},
  {iD: uuid.New().String(), method: string(gwapiv1.HTTPMethodHead), policies: policies,
- auth: auth, rateLimitPolicy: ratelimitPolicy, scopes: scopes, mirrorEndpoints: mirrorEndpoints},
+ auth: auth, rateLimitPolicy: ratelimitPolicy, scopes: scopes, mirrorEndpointClusters: mirrorEndpointClusters},
  {iD: uuid.New().String(), method: string(gwapiv1.HTTPMethodOptions), policies: policies,
- auth: auth, rateLimitPolicy: ratelimitPolicy, scopes: scopes, mirrorEndpoints: mirrorEndpoints}}
+ auth: auth, rateLimitPolicy: ratelimitPolicy, scopes: scopes, mirrorEndpointClusters: mirrorEndpointClusters}}
 }
 
 // SetInfoAPICR populates ID, ApiType, Version and XWso2BasePath of adapterInternalAPI.

adapter/internal/operator/controllers/dp/api_controller.go

@@ -851,21 +851,31 @@ func (apiReconciler *APIReconciler) getResolvedBackendsMapping(ctx context.Conte
  for _, filter := range rule.Filters {
  if filter.RequestMirror != nil {
  mirrorBackend := filter.RequestMirror.BackendRef
-
  mirrorBackendNamespacedName := types.NamespacedName{
  Name: string(mirrorBackend.Name),
  Namespace: utils.GetNamespace(mirrorBackend.Namespace, httpRoute.Namespace),
  }
- if _, exists := backendMapping[mirrorBackendNamespacedName.String()]; !exists {
- resolvedMirrorBackend := utils.GetResolvedBackend(ctx, apiReconciler.client, mirrorBackendNamespacedName, &api)
- if resolvedMirrorBackend != nil {
- backendMapping[mirrorBackendNamespacedName.String()] = resolvedMirrorBackend
- } else {
- return nil, fmt.Errorf("unable to find backend %s", mirrorBackendNamespacedName.String())
+ if string(*mirrorBackend.Kind) == constants.KindBackend {
+ if _, exists := backendMapping[mirrorBackendNamespacedName.String()]; !exists {
+ resolvedMirrorBackend := utils.GetResolvedBackend(ctx, apiReconciler.client, mirrorBackendNamespacedName, &api)
+ if resolvedMirrorBackend != nil {
+ backendMapping[mirrorBackendNamespacedName.String()] = resolvedMirrorBackend
+ } else {
+ return nil, fmt.Errorf("unable to find backend %s", mirrorBackendNamespacedName.String())
+ }
+ }
+ } else if string(*mirrorBackend.Kind) == constants.KindService {
+ var err error
+ service, err := utils.GetService(ctx, apiReconciler.client, utils.GetNamespace(mirrorBackend.Namespace, httpRoute.Namespace), string(mirrorBackend.Name))
+ if err != nil {
+ return nil, fmt.Errorf("unable to find service %s", mirrorBackendNamespacedName.String())
+ }
+ backendMapping[mirrorBackendNamespacedName.String()], err = utils.GetResolvedBackendFromService(service, int(*mirrorBackend.Port))
+ if err != nil {
+ return nil, fmt.Errorf("error in getting service information %s", service)
  }
  }
  }
-
  }
  }
 
@@ -1839,9 +1849,7 @@ func addIndexes(ctx context.Context, mgr manager.Manager) error {
  authentication := rawObj.(*dpv1alpha2.Authentication)
  var apis []string
  if authentication.Spec.TargetRef.Kind == constants.KindAPI {
-
  namespace, err := utils.ValidateAndRetrieveNamespace((*gwapiv1.Namespace)(authentication.Spec.TargetRef.Namespace), authentication.Namespace)
-
  if err != nil {
  loggers.LoggerAPKOperator.Errorf("Namespace mismatch. TargetRef %s needs to be in the same namespace as the Athentication %s. Expected: %s, Actual: %s",
  string(authentication.Spec.TargetRef.Name), authentication.Name, authentication.Namespace, string(*authentication.Spec.TargetRef.Namespace))
@@ -1956,7 +1964,7 @@ func addIndexes(ctx context.Context, mgr manager.Manager) error {
  return err
  }
 
- // ratelimite policy to API indexer
+ // ratelimit policy to API indexer
  if err := mgr.GetFieldIndexer().IndexField(ctx, &dpv1alpha1.RateLimitPolicy{}, apiRateLimitIndex,
  func(rawObj k8client.Object) []string {
  ratelimitPolicy := rawObj.(*dpv1alpha1.RateLimitPolicy)