Add gRPC support for APK

adapter/internal/oasparser/constants/constants.go

@@ -98,6 +98,7 @@ const (
  SOAP string = "SOAP"
  WS string = "WS"
  GRAPHQL string = "GraphQL"
+ GRPC string = "GRPC"
  WEBHOOK string = "WEBHOOK"
  SSE string = "SSE"
  Prototyped string = "prototyped"

adapter/internal/oasparser/envoyconf/routes_with_clusters.go

@@ -197,6 +197,74 @@ func CreateRoutesWithClusters(adapterInternalAPI *model.AdapterInternalAPI, inte
  }
  return routes, clusters, endpoints, nil
  }
+ if adapterInternalAPI.GetAPIType() == constants.GRPC {
+ basePath := strings.TrimSuffix(adapterInternalAPI.Endpoints.Endpoints[0].Basepath, "/")
+
+ clusterName := getClusterName(adapterInternalAPI.Endpoints.EndpointPrefix, organizationID, vHost,
+ adapterInternalAPI.GetTitle(), apiVersion, "")
+ adapterInternalAPI.Endpoints.HTTP2BackendEnabled = true
+ cluster, address, err := processEndpoints(clusterName, adapterInternalAPI.Endpoints, timeout, basePath)
+ if err != nil {
+ logger.LoggerOasparser.ErrorC(logging.PrintError(logging.Error2239, logging.MAJOR,
+ "Error while adding grpc endpoints for %s:%v. %v", apiTitle, apiVersion, err.Error()))
+ return nil, nil, nil, fmt.Errorf("error while adding grpc endpoints for %s:%v. %v", apiTitle, apiVersion,
+ err.Error())
+ }
+ clusters = append(clusters, cluster)
+ endpoints = append(endpoints, address...)
+
+ for _, resource := range adapterInternalAPI.GetResources() {
+ var clusterName string
+ resourcePath := resource.GetPath()
+ endpoint := resource.GetEndpoints()
+ endpoint.HTTP2BackendEnabled = true
+ basePath := strings.TrimSuffix(endpoint.Endpoints[0].Basepath, "/")
+ existingClusterName := getExistingClusterName(*endpoint, processedEndpoints)
+
+ if existingClusterName == "" {
+ clusterName = getClusterName(endpoint.EndpointPrefix, organizationID, vHost, adapterInternalAPI.GetTitle(), apiVersion, resource.GetID())
+ cluster, address, err := processEndpoints(clusterName, endpoint, timeout, basePath)
+ if err != nil {
+ logger.LoggerOasparser.ErrorC(logging.PrintError(logging.Error2239, logging.MAJOR, "Error while adding resource level endpoints for %s:%v-%v. %v", apiTitle, apiVersion, resourcePath, err.Error()))
+ } else {
+ clusters = append(clusters, cluster)
+ endpoints = append(endpoints, address...)
+ processedEndpoints[clusterName] = *endpoint
+ }
+ } else {
+ clusterName = existingClusterName
+ }
+ // Create resource level interceptor clusters if required
+ //TODO remove this if no interceptor needed for grpc (Dineth)
+ clustersI, endpointsI, operationalReqInterceptors, operationalRespInterceptorVal := createInterceptorResourceClusters(adapterInternalAPI,
+ interceptorCerts, vHost, organizationID, apiRequestInterceptor, apiResponseInterceptor, resource)
+ clusters = append(clusters, clustersI...)
+ endpoints = append(endpoints, endpointsI...)
+ routeParams := genRouteCreateParams(adapterInternalAPI, resource, vHost, basePath, clusterName, *operationalReqInterceptors, *operationalRespInterceptorVal, organizationID,
+ false, false)
+
+ routeP, err := createRoutes(routeParams)
+ if err != nil {
+ logger.LoggerXds.ErrorC(logging.PrintError(logging.Error2231, logging.MAJOR,
+ "Error while creating routes for GRPC API %s %s for path: %s Error: %s", adapterInternalAPI.GetTitle(),
+ adapterInternalAPI.GetVersion(), resource.GetPath(), err.Error()))
+ return nil, nil, nil, fmt.Errorf("error while creating routes. %v", err)
+ }
+ routes = append(routes, routeP...)
+ if adapterInternalAPI.IsDefaultVersion {
+ defaultRoutes, errDefaultPath := createRoutes(genRouteCreateParams(adapterInternalAPI, resource, vHost, basePath, clusterName, *operationalReqInterceptors, *operationalRespInterceptorVal, organizationID,
+ false, true))
+ if errDefaultPath != nil {
+ logger.LoggerXds.ErrorC(logging.PrintError(logging.Error2231, logging.MAJOR, "Error while creating routes for GRPC API %s %s for path: %s Error: %s", adapterInternalAPI.GetTitle(), adapterInternalAPI.GetVersion(), removeFirstOccurrence(resource.GetPath(), adapterInternalAPI.GetVersion()), errDefaultPath.Error()))
+ return nil, nil, nil, fmt.Errorf("error while creating routes. %v", errDefaultPath)
+ }
+ routes = append(routes, defaultRoutes...)
+ }
+
+ }
+
+ return routes, clusters, endpoints, nil
+ }
  for _, resource := range adapterInternalAPI.GetResources() {
  var clusterName string
  resourcePath := resource.GetPath()
@@ -860,8 +928,14 @@ func createRoutes(params *routeCreateParams) (routes []*routev3.Route, err error
  decorator *routev3.Decorator
  )
  if params.createDefaultPath {
- xWso2Basepath = removeFirstOccurrence(xWso2Basepath, "/"+version)
- resourcePath = removeFirstOccurrence(resource.GetPath(), "/"+version)
+ //check if basepath is separated from version by a . or /
+ if strings.Contains(basePath, "."+version) {
+ xWso2Basepath = removeFirstOccurrence(basePath, "."+version)
+ resourcePath = removeFirstOccurrence(resource.GetPath(), "."+version)
+ } else {
+ xWso2Basepath = removeFirstOccurrence(xWso2Basepath, "/"+version)
+ resourcePath = removeFirstOccurrence(resource.GetPath(), "/"+version)
+ }
  }
 
  if pathMatchType != gwapiv1.PathMatchExact {
@@ -1058,6 +1132,16 @@ func createRoutes(params *routeCreateParams) (routes []*routev3.Route, err error
  rewritePath := generateRoutePathForReWrite(basePath, resourcePath, pathMatchType)
  action.Route.RegexRewrite = generateRegexMatchAndSubstitute(rewritePath, resourcePath, pathMatchType)
 
+ if apiType == "GRPC" {
+ match.Headers = nil
+ newRoutePath := "/" + strings.TrimPrefix(resourcePath, basePath+".")
+ if newRoutePath == "/"+resourcePath {
+ temp := removeFirstOccurrence(basePath, "."+version)
+ newRoutePath = "/" + strings.TrimPrefix(resourcePath, temp+".")
+ }
+ action.Route.RegexRewrite = generateRegexMatchAndSubstitute(rewritePath, newRoutePath, pathMatchType)
+ }
+
  route := generateRouteConfig(xWso2Basepath, match, action, nil, decorator, perRouteFilterConfigs,
  nil, nil, nil, nil) // general headers to add and remove are included in this methods
  routes = append(routes, route)
@@ -1209,8 +1293,14 @@ func CreateAPIDefinitionEndpoint(adapterInternalAPI *model.AdapterInternalAPI, v
 
  matchPath := basePath + endpoint
  if isDefaultversion {
- basePathWithoutVersion := removeLastOccurrence(basePath, "/"+version)
- matchPath = basePathWithoutVersion + endpoint
+ if adapterInternalAPI.GetAPIType() == "GRPC" {
+ basePathWithoutVersion := removeLastOccurrence(basePath, "."+version)
+ matchPath = basePathWithoutVersion + "/" + vHost + endpoint
+ } else {
+ basePathWithoutVersion := removeLastOccurrence(basePath, "/"+version)
+ matchPath = basePathWithoutVersion + endpoint
+
+ }
  }
 
  matchPath = strings.Replace(matchPath, basePath, regexp.QuoteMeta(basePath), 1)

adapter/internal/oasparser/model/adapter_internal_api.go

@@ -21,6 +21,7 @@ import (
  "errors"
  "fmt"
  "net/url"
+ gwapiv1a2 "sigs.k8s.io/gateway-api/apis/v1alpha2"
  "strconv"
  "strings"
  "time"
@@ -940,6 +941,183 @@ func (adapterInternalAPI *AdapterInternalAPI) SetInfoGQLRouteCR(gqlRoute *dpv1al
  return nil
 }
 
+// SetInfoGRPCRouteCR populates resources and endpoints of adapterInternalAPI. httpRoute.Spec.Rules.Matches
+// are used to create resources and httpRoute.Spec.Rules.BackendRefs are used to create EndpointClusters.
+func (adapterInternalAPI *AdapterInternalAPI) SetInfoGRPCRouteCR(grpcRoute *gwapiv1a2.GRPCRoute, resourceParams ResourceParams) error {
+ var resources []*Resource
+ outputAuthScheme := utils.TieBreaker(utils.GetPtrSlice(maps.Values(resourceParams.AuthSchemes)))
+ outputAPIPolicy := utils.TieBreaker(utils.GetPtrSlice(maps.Values(resourceParams.APIPolicies)))
+ outputRatelimitPolicy := utils.TieBreaker(utils.GetPtrSlice(maps.Values(resourceParams.RateLimitPolicies)))
+
+ disableScopes := true
+ config := config.ReadConfigs()
+
+ var authScheme *dpv1alpha2.Authentication
+ if outputAuthScheme != nil {
+ authScheme = *outputAuthScheme
+ }
+ var apiPolicy *dpv1alpha2.APIPolicy
+ if outputAPIPolicy != nil {
+ apiPolicy = *outputAPIPolicy
+ }
+ var ratelimitPolicy *dpv1alpha1.RateLimitPolicy
+ if outputRatelimitPolicy != nil {
+ ratelimitPolicy = *outputRatelimitPolicy
+ }
+
+ //We are only supporting one backend for now
+ backend := grpcRoute.Spec.Rules[0].BackendRefs[0]
+ backendName := types.NamespacedName{
+ Name: string(backend.Name),
+ Namespace: utils.GetNamespace(backend.Namespace, grpcRoute.Namespace),
+ }
+ resolvedBackend, ok := resourceParams.BackendMapping[backendName.String()]
+ if ok {
+ endpointConfig := &EndpointConfig{}
+ if resolvedBackend.CircuitBreaker != nil {
+ endpointConfig.CircuitBreakers = &CircuitBreakers{
+ MaxConnections: int32(resolvedBackend.CircuitBreaker.MaxConnections),
+ MaxRequests: int32(resolvedBackend.CircuitBreaker.MaxRequests),
+ MaxPendingRequests: int32(resolvedBackend.CircuitBreaker.MaxPendingRequests),
+ MaxRetries: int32(resolvedBackend.CircuitBreaker.MaxRetries),
+ MaxConnectionPools: int32(resolvedBackend.CircuitBreaker.MaxConnectionPools),
+ }
+ }
+ if resolvedBackend.Timeout != nil {
+ endpointConfig.TimeoutInMillis = resolvedBackend.Timeout.UpstreamResponseTimeout * 1000
+ endpointConfig.IdleTimeoutInSeconds = resolvedBackend.Timeout.DownstreamRequestIdleTimeout
+ }
+ if resolvedBackend.Retry != nil {
+ statusCodes := config.Envoy.Upstream.Retry.StatusCodes
+ if len(resolvedBackend.Retry.StatusCodes) > 0 {
+ statusCodes = resolvedBackend.Retry.StatusCodes
+ }
+ endpointConfig.RetryConfig = &RetryConfig{
+ Count: int32(resolvedBackend.Retry.Count),
+ StatusCodes: statusCodes,
+ BaseIntervalInMillis: int32(resolvedBackend.Retry.BaseIntervalMillis),
+ }
+ }
+ adapterInternalAPI.Endpoints = &EndpointCluster{
+ Endpoints: GetEndpoints(backendName, resourceParams.BackendMapping),
+ Config: endpointConfig,
+ }
+ if resolvedBackend.HealthCheck != nil {
+ adapterInternalAPI.Endpoints.HealthCheck = &HealthCheck{
+ Interval: resolvedBackend.HealthCheck.Interval,
+ Timeout: resolvedBackend.HealthCheck.Timeout,
+ UnhealthyThreshold: resolvedBackend.HealthCheck.UnhealthyThreshold,
+ HealthyThreshold: resolvedBackend.HealthCheck.HealthyThreshold,
+ }
+ }
+
+ var securityConfig []EndpointSecurity
+ switch resolvedBackend.Security.Type {
+ case "Basic":
+ securityConfig = append(securityConfig, EndpointSecurity{
+ Password: string(resolvedBackend.Security.Basic.Password),
+ Username: string(resolvedBackend.Security.Basic.Username),
+ Type: string(resolvedBackend.Security.Type),
+ Enabled: true,
+ })
+ }
+ adapterInternalAPI.EndpointSecurity = utils.GetPtrSlice(securityConfig)
+ } else {
+ return fmt.Errorf("backend: %s has not been resolved", backendName)
+ }
+
+ for _, rule := range grpcRoute.Spec.Rules {
+ var policies = OperationPolicies{}
+ var endPoints []Endpoint
+ resourceAuthScheme := authScheme
+ resourceRatelimitPolicy := ratelimitPolicy
+ var scopes []string
+ for _, filter := range rule.Filters {
+ if filter.ExtensionRef != nil && filter.ExtensionRef.Kind == constants.KindAuthentication {
+ if ref, found := resourceParams.ResourceAuthSchemes[types.NamespacedName{
+ Name: string(filter.ExtensionRef.Name),
+ Namespace: grpcRoute.Namespace,
+ }.String()]; found {
+ resourceAuthScheme = concatAuthSchemes(authScheme, &ref)
+ } else {
+ return fmt.Errorf(`auth scheme: %s has not been resolved, spec.targetRef.kind should be 
+ 'Resource' in resource level Authentications`, filter.ExtensionRef.Name)
+ }
+ }
+ if filter.ExtensionRef != nil && filter.ExtensionRef.Kind == constants.KindScope {
+ if ref, found := resourceParams.ResourceScopes[types.NamespacedName{
+ Name: string(filter.ExtensionRef.Name),
+ Namespace: grpcRoute.Namespace,
+ }.String()]; found {
+ scopes = ref.Spec.Names
+ disableScopes = false
+ } else {
+ return fmt.Errorf("scope: %s has not been resolved in namespace %s", filter.ExtensionRef.Name, grpcRoute.Namespace)
+ }
+ }
+ if filter.ExtensionRef != nil && filter.ExtensionRef.Kind == constants.KindRateLimitPolicy {
+ if ref, found := resourceParams.ResourceRateLimitPolicies[types.NamespacedName{
+ Name: string(filter.ExtensionRef.Name),
+ Namespace: grpcRoute.Namespace,
+ }.String()]; found {
+ resourceRatelimitPolicy = concatRateLimitPolicies(ratelimitPolicy, &ref)
+ } else {
+ return fmt.Errorf(`ratelimitpolicy: %s has not been resolved, spec.targetRef.kind should be 
+ 'Resource' in resource level RateLimitPolicies`, filter.ExtensionRef.Name)
+ }
+ }
+ }
+ resourceAuthScheme = concatAuthSchemes(resourceAuthScheme, nil)
+ resourceRatelimitPolicy = concatRateLimitPolicies(resourceRatelimitPolicy, nil)
+
+ loggers.LoggerOasparser.Debugf("Calculating auths for API ..., API_UUID = %v", adapterInternalAPI.UUID)
+ apiAuth := getSecurity(resourceAuthScheme)
+
+ //TODO Add path match type (Dineth)
+ for _, match := range rule.Matches {
+ resourcePath := adapterInternalAPI.GetXWso2Basepath() + "." + *match.Method.Service + "/" + *match.Method.Method
+ endPoints = append(endPoints, GetEndpoints(backendName, resourceParams.BackendMapping)...)
+ resource := &Resource{path: resourcePath, pathMatchType: "Exact",
+ methods: []*Operation{{iD: uuid.New().String(), method: "post", policies: policies,
+ auth: apiAuth, rateLimitPolicy: parseRateLimitPolicyToInternal(resourceRatelimitPolicy), scopes: scopes}},
+ iD: uuid.New().String(),
+ }
+ endpoints := GetEndpoints(backendName, resourceParams.BackendMapping)
+ resource.endpoints = &EndpointCluster{
+ Endpoints: endpoints,
+ }
+ resources = append(resources, resource)
+ }
+ }
+
+ ratelimitPolicy = concatRateLimitPolicies(ratelimitPolicy, nil)
+ apiPolicy = concatAPIPolicies(apiPolicy, nil)
+ authScheme = concatAuthSchemes(authScheme, nil)
+
+ adapterInternalAPI.RateLimitPolicy = parseRateLimitPolicyToInternal(ratelimitPolicy)
+ adapterInternalAPI.resources = resources
+ adapterInternalAPI.xWso2Cors = getCorsConfigFromAPIPolicy(apiPolicy)
+ if authScheme.Spec.Override != nil && authScheme.Spec.Override.Disabled != nil {
+ adapterInternalAPI.disableAuthentications = *authScheme.Spec.Override.Disabled
+ }
+ authSpec := utils.SelectPolicy(&authScheme.Spec.Override, &authScheme.Spec.Default, nil, nil)
+ if authSpec != nil && authSpec.AuthTypes != nil && authSpec.AuthTypes.Oauth2.Required != "" {
+ adapterInternalAPI.SetXWSO2ApplicationSecurity(authSpec.AuthTypes.Oauth2.Required == "mandatory")
+ } else {
+ adapterInternalAPI.SetXWSO2ApplicationSecurity(true)
+ }
+ adapterInternalAPI.disableScopes = disableScopes
+ // Check whether the API has a backend JWT token
+ if apiPolicy != nil && apiPolicy.Spec.Override != nil && apiPolicy.Spec.Override.BackendJWTPolicy != nil {
+ backendJWTPolicy := resourceParams.BackendJWTMapping[types.NamespacedName{
+ Name: apiPolicy.Spec.Override.BackendJWTPolicy.Name,
+ Namespace: grpcRoute.Namespace,
+ }.String()].Spec
+ adapterInternalAPI.backendJWTTokenInfo = parseBackendJWTTokenToInternal(backendJWTPolicy)
+ }
+ return nil
+}
+
 func (endpoint *Endpoint) validateEndpoint() error {
  if endpoint.Port == 0 || endpoint.Port > 65535 {
  return errors.New("endpoint port value should be between 0 and 65535")

adapter/internal/oasparser/model/common.go

@@ -108,7 +108,7 @@ func getHostandBasepathandPort(apiType string, rawURL string) (*Endpoint, error)
  rawURL = strings.Trim(rawURL, " ")
 
  if !strings.Contains(rawURL, "://") {
- if apiType == constants.REST || apiType == constants.GRAPHQL {
+ if apiType == constants.REST || apiType == constants.GRAPHQL || apiType == constants.GRPC {
  rawURL = "http://" + rawURL
  } else if apiType == constants.WS {
  rawURL = "ws://" + rawURL

adapter/internal/operator/config/crd/bases/dp.wso2.com_apis.yaml

@@ -72,7 +72,7 @@ spec:
  type: array
  apiType:
  description: APIType denotes the type of the API. Possible values
- could be REST, GraphQL, Async
+ could be REST, GraphQL, GRPC Async
  enum:
  - REST
  type: string
@@ -244,10 +244,11 @@ spec:
  type: array
  apiType:
  description: APIType denotes the type of the API. Possible values
- could be REST, GraphQL, Async
+ could be REST, GraphQL, GRPC Async
  enum:
  - REST
  - GraphQL
+ - GRPC
  type: string
  apiVersion:
  description: APIVersion is the version number of the API.