Add http, https and multiple port support

adapter/internal/data_holder/data-holder.go

@@ -0,0 +1,91 @@
+/*
+ *  Copyright (c) 2023, WSO2 LLC. (http://www.wso2.org) All Rights Reserved.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ */
+
+package data_holder
+
+import (
+	k8types "k8s.io/apimachinery/pkg/types"
+	gwapiv1b1 "sigs.k8s.io/gateway-api/apis/v1beta1"
+)
+
+// The following variables will be used to store the state of the apk.
+// This data should not be utilized by operator thread as its not designed for parallel access.
+var (
+	// This variable in the structure of gateway's namespaced name -> gateway
+	gatewayMap       map[string]gwapiv1b1.Gateway
+)
+
+func init() {
+	gatewayMap = make(map[string]gwapiv1b1.Gateway)
+}
+
+// GetGatewayMap returns list of cached gateways
+func GetGatewayMap() map[string]gwapiv1b1.Gateway {
+	return gatewayMap
+}
+
+// UpdateGateway caches the gateway
+func UpdateGateway(gateway gwapiv1b1.Gateway) {
+	gatewayMap[k8types.NamespacedName{Name: gateway.Name, Namespace: gateway.Namespace}.String()] = gateway
+}
+
+// RemoveGateway removes the gateway from the cache
+func RemoveGateway(gateway gwapiv1b1.Gateway) {
+	delete(gatewayMap, k8types.NamespacedName{Name: gateway.Name, Namespace: gateway.Namespace}.String())
+}
+
+// GetAllGatewayListeners return the list of all the listeners that stored in the gateway cache
+func GetAllGatewayListeners() []gwapiv1b1.Listener {
+	listeners := make([]gwapiv1b1.Listener, 0)
+	for _, gateway := range gatewayMap {
+		for _, listener := range gateway.Spec.Listeners {
+			listeners = append(listeners, listener)
+		}
+	}
+	return listeners
+}
+
+
+// GetListenersAsPortalPortMap returns a map that have a structure protocol -> port -> list of listeners for that port and protocol combination
+// Data is derived based on the current status of the gatwayMap cache
+func GetListenersAsPortalPortMap() map[string]map[uint32][]gwapiv1b1.Listener{
+	listenersAsPortalPortMap := make(map[string]map[uint32][]gwapiv1b1.Listener)
+	for _, gateway := range gatewayMap {
+		for _, listener := range gateway.Spec.Listeners {
+			protocol := string(listener.Protocol)
+			port := uint32(listener.Port)
+			if portMap, portFound := listenersAsPortalPortMap[protocol]; portFound {
+				if listenersList, listenerListFound := portMap[port]; listenerListFound {
+					if (listenersList == nil) {
+						listenersList = []gwapiv1b1.Listener{listener}
+					} else {
+						listenersList = append(listenersList, listener)
+					}
+					listenersAsPortalPortMap[protocol][port] = listenersList
+				} else {
+					listenerList := []gwapiv1b1.Listener{listener}
+					listenersAsPortalPortMap[protocol][port] = listenerList
+				}
+			} else {
+				listenersAsPortalPortMap[protocol] = make(map[uint32][]gwapiv1b1.Listener)
+				listenerList := []gwapiv1b1.Listener{listener}
+				listenersAsPortalPortMap[protocol][port] = listenerList
+			}
+		}
+	}
+	return listenersAsPortalPortMap
+}

adapter/internal/discovery/xds/common/utils.go

@@ -20,7 +20,9 @@ package common
 
 import (
 	"sync"
-
+	"fmt"
+	"regexp"
+	"strings"
 	discovery "github.com/envoyproxy/go-control-plane/envoy/service/discovery/v3"
 )
 
@@ -92,3 +94,40 @@ func GetNodeIdentifier(request *discovery.DiscoveryRequest) string {
 	}
 	return nodeIdentifier
 }
+
+// GetEnvoyListenerName prepares the envoy listener name based on the protocol and port
+func GetEnvoyListenerName(protocol string, port uint32) string {
+	return fmt.Sprintf("%s_%d_listener", protocol, port)
+}
+
+// GetEnvoyRouteConfigName prepares Envoy route config name based on Gateway spec's listener name and section name
+func GetEnvoyRouteConfigName(listenerName string, sectionName string) string {
+	return fmt.Sprintf("%s_%s", listenerName, sectionName)
+}
+
+// FindElement searches for an element in a slice based on a given predicate.
+// It returns the element and true if the element was found.
+func FindElement[T any](collection []T, predicate func(item T) bool) (T, bool) {
+	for _, item := range collection {
+		if predicate(item) {
+			return item, true
+		}
+	}
+	var dummy T
+	return dummy, false
+}
+
+// MatchesHostname check whether the domain matches the hostname pattern
+func MatchesHostname(domain, pattern string) bool {
+	// Escape special characters in the pattern and replace wildcard with regex pattern
+	pattern = strings.ReplaceAll(regexp.QuoteMeta(pattern), `\*`, `.*`)
+	// Append start and end of line anchors
+	pattern = "^" + pattern + "$"
+
+	matched, err := regexp.MatchString(pattern, domain)
+	if err != nil {
+		return false
+	}
+
+	return matched
+}

adapter/internal/discovery/xds/server.go

@@ -40,6 +40,7 @@ import (
 
 	envoy_resource "github.com/envoyproxy/go-control-plane/pkg/resource/v3"
 	"github.com/wso2/apk/adapter/config"
+	"github.com/wso2/apk/adapter/internal/discovery/xds/common"
 	logger "github.com/wso2/apk/adapter/internal/loggers"
 	logging "github.com/wso2/apk/adapter/internal/logging"
 	oasParser "github.com/wso2/apk/adapter/internal/oasparser"
@@ -53,6 +54,7 @@ import (
 	eventhubTypes "github.com/wso2/apk/adapter/pkg/eventhub/types"
 	"github.com/wso2/apk/adapter/pkg/utils/stringutils"
 	gwapiv1b1 "sigs.k8s.io/gateway-api/apis/v1beta1"
+	"github.com/wso2/apk/adapter/internal/data_holder"
 )
 
 // EnvoyInternalAPI struct use to hold envoy resources and adapter internal resources
@@ -67,8 +69,8 @@ type EnvoyInternalAPI struct {
 
 // EnvoyGatewayConfig struct use to hold envoy gateway resources
 type EnvoyGatewayConfig struct {
-	listener                *listenerv3.Listener
-	routeConfig             *routev3.RouteConfiguration
+	listeners               []*listenerv3.Listener
+	routeConfigs            []*routev3.RouteConfiguration
 	clusters                []*clusterv3.Cluster
 	endpoints               []*corev3.Address
 	customRateLimitPolicies []*model.CustomRateLimitPolicy
@@ -125,6 +127,10 @@ const (
 	apiController        string = "APIController"
 )
 
+type envoyRoutesWithSectionName struct {
+	routes []*routev3.Route
+}
+
 func maxRandomBigInt() *big.Int {
 	return big.NewInt(int64(maxRandomInt))
 }
@@ -399,23 +405,61 @@ func GenerateEnvoyResoucesForGateway(gatewayName string) ([]types.Resource,
 	}
 
 	envoyGatewayConfig, gwFound := gatewayLabelConfigMap[gatewayName]
-	listener := envoyGatewayConfig.listener
-	if !gwFound || listener == nil {
+	listeners := envoyGatewayConfig.listeners
+	if !gwFound || listeners == nil || len(listeners) == 0 {
 		return nil, nil, nil, nil, nil
 	}
-	routesFromListener := listenerToRouteArrayMap[listener.Name]
-	var vhostToRouteArrayFilteredMap = make(map[string][]*routev3.Route)
-	for vhost, routes := range vhostToRouteArrayMap {
-		if vhost == systemHost || checkRoutes(routes, routesFromListener) {
-			vhostToRouteArrayFilteredMap[vhost] = routes
+	routeConfigs := make([]*routev3.RouteConfiguration, 0)
+	for _, listener := range listeners {
+		for vhost, routes := range vhostToRouteArrayMap {
+			matchedListener, found := common.FindElement(data_holder.GetAllGatewayListeners(), func(listenerLocal gwapiv1b1.Listener) bool {
+				if (listenerLocal.Hostname != nil && common.MatchesHostname(vhost, string(*listenerLocal.Hostname))) {
+					if (listener.Name == common.GetEnvoyListenerName(string(listenerLocal.Protocol), uint32(listenerLocal.Port))) {
+						return true
+					}
+				}
+				return false
+			})
+			if found {
+				// Prepare the route config name based on the gateway listener section name.
+				routeConfigName := common.GetEnvoyRouteConfigName(listener.Name, string(matchedListener.Name));
+				routesConfig := oasParser.GetRouteConfigs(map[string][]*routev3.Route{vhost:routes}, routeConfigName, envoyGatewayConfig.customRateLimitPolicies)
+
+				routeConfigMatched, alreadyExistsInRouteConfigList := common.FindElement(routeConfigs, func(routeConf *routev3.RouteConfiguration) bool {
+					if (routeConf.Name == routesConfig.Name) {
+						return true
+					}
+					return false
+				})
+				if alreadyExistsInRouteConfigList {
+					logger.LoggerAPKOperator.Debugf("Route already exists. %+v", routesConfig.Name)
+					routeConfigMatched.VirtualHosts = append(routeConfigMatched.VirtualHosts, routesConfig.VirtualHosts...)
+				} else {
+					routeConfigs = append(routeConfigs, routesConfig)
+				}
+			} else {
+				logger.LoggerAPKOperator.Errorf("Failed to find a matching gateway listener for this vhost: %s", vhost)
+			}
+		}
+	}
+
+	// Find gateway listeners that has $systemHost as its hostname and add the system routeConfig referencing those listeners
+	gatewayListeners := data_holder.GetAllGatewayListeners()
+	for _, listener := range gatewayListeners {
+		if (systemHost == string(*listener.Hostname)) {
+			var vhostToRouteArrayFilteredMapForSystemEndpoints = make(map[string][]*routev3.Route)
+			vhostToRouteArrayFilteredMapForSystemEndpoints[systemHost] = vhostToRouteArrayMap[systemHost]
+			routeConfigName := common.GetEnvoyRouteConfigName(common.GetEnvoyListenerName(string(listener.Protocol), uint32(listener.Port)), string(listener.Name))
+			systemRoutesConfig := oasParser.GetRouteConfigs(vhostToRouteArrayFilteredMapForSystemEndpoints, routeConfigName, envoyGatewayConfig.customRateLimitPolicies)
+			routeConfigs = append(routeConfigs, systemRoutesConfig)
 		}
 	}
-	routesConfig := oasParser.GetRouteConfigs(vhostToRouteArrayFilteredMap, listener.Name, envoyGatewayConfig.customRateLimitPolicies)
-	envoyGatewayConfig.routeConfig = routesConfig
+
+	envoyGatewayConfig.routeConfigs = routeConfigs
 	clusterArray = append(clusterArray, envoyGatewayConfig.clusters...)
 	endpointArray = append(endpointArray, envoyGatewayConfig.endpoints...)
-	endpoints, clusters, listeners, routeConfigs := oasParser.GetCacheResources(endpointArray, clusterArray, listener, routesConfig)
-	return endpoints, clusters, listeners, routeConfigs, apis
+	listeners_, clusters, routeConfigs_, endpoints := oasParser.GetCacheResources(endpointArray, clusterArray, listeners, routeConfigs)
+	return listeners_, clusters, routeConfigs_, endpoints, apis
 }
 
 // function to check routes []*routev3.Route equlas routes []*routev3.Route
@@ -488,7 +532,6 @@ func updateXdsCache(label string, endpoints []types.Resource, clusters []types.R
 		logger.LoggerXds.ErrorC(logging.PrintError(logging.Error1414, logging.MAJOR, "Error while setting the snapshot : %v", errSetSnap.Error()))
 		return false
 	}
-	logger.LoggerXds.Infof("New Router cache updated for the label: " + label + " version: " + fmt.Sprint(version))
 	return true
 }
 
@@ -641,7 +684,7 @@ func RemoveAPIFromOrgAPIMap(uuid string, orgID string) {
 }
 
 // UpdateAPICache updates the xDS cache related to the API Lifecycle event.
-func UpdateAPICache(vHosts []string, newLabels []string, newlistenersForRoutes []string, adapterInternalAPI model.AdapterInternalAPI) error {
+func UpdateAPICache(vHosts []string, newLabels []string, listener string, sectionName string, adapterInternalAPI model.AdapterInternalAPI) error {
 	mutexForInternalMapUpdate.Lock()
 	defer mutexForInternalMapUpdate.Unlock()
 
@@ -671,6 +714,7 @@ func UpdateAPICache(vHosts []string, newLabels []string, newlistenersForRoutes [
 
 	// Create internal mappigs for new vHosts
 	for _, vHost := range vHosts {
+		logger.LoggerAPKOperator.Debugf("Creating internal mapping for vhost: %s", vHost)
 		apiUUID := adapterInternalAPI.UUID
 		apiIdentifier := GenerateIdentifierForAPIWithUUID(vHost, apiUUID)
 		var oldLabels []string
@@ -700,10 +744,15 @@ func UpdateAPICache(vHosts []string, newLabels []string, newlistenersForRoutes [
 			endpointAddresses:  endpoints,
 			enforcerAPI:        oasParser.GetEnforcerAPI(adapterInternalAPI, vHost),
 		}
-		if _, ok := listenerToRouteArrayMap[newlistenersForRoutes[0]]; ok {
-			listenerToRouteArrayMap[newlistenersForRoutes[0]] = append(listenerToRouteArrayMap[newlistenersForRoutes[0]], routes...)
+		if _, ok := listenerToRouteArrayMap[listener]; ok {
+			routesList := listenerToRouteArrayMap[listener]
+			if (routesList == nil) {
+				routesList = make([]*routev3.Route, 0)
+			}
+			routesList = append(routesList, routes...)
+			listenerToRouteArrayMap[listener] = routesList
 		} else {
-			listenerToRouteArrayMap[newlistenersForRoutes[0]] = routes
+			listenerToRouteArrayMap[listener] = routes
 		}
 
 		revisionStatus := updateXdsCacheOnAPIChange(oldLabels, newLabels)
@@ -715,8 +764,8 @@ func UpdateAPICache(vHosts []string, newLabels []string, newlistenersForRoutes [
 // UpdateGatewayCache updates the xDS cache related to the Gateway Lifecycle event.
 func UpdateGatewayCache(gateway *gwapiv1b1.Gateway, resolvedListenerCerts map[string]map[string][]byte,
 	gwLuaScript string, customRateLimitPolicies []*model.CustomRateLimitPolicy) error {
-	listener := oasParser.GetProductionListener(gateway, resolvedListenerCerts, gwLuaScript)
-	gatewayLabelConfigMap[gateway.Name].listener = listener
+	listeners := oasParser.GetProductionListener(gateway, resolvedListenerCerts, gwLuaScript)
+	gatewayLabelConfigMap[gateway.Name].listeners = listeners
 	conf := config.ReadConfigs()
 	if conf.Envoy.RateLimit.Enabled {
 		gatewayLabelConfigMap[gateway.Name].customRateLimitPolicies = customRateLimitPolicies

adapter/internal/discovery/xds/server_test.go

@@ -108,7 +108,7 @@ func TestUpdateAPICache(t *testing.T) {
 				for _, label := range test.labels {
 					SanitizeGateway(label, true)
 				}
-				UpdateAPICache(test.vHosts, test.labels, test.listeners, test.adapterInternalAPI)
+				UpdateAPICache(test.vHosts, test.labels, test.listeners[0], "httpslistener", test.adapterInternalAPI)
 				identifier := GetvHostsIdentifier(test.adapterInternalAPI.UUID, "prod")
 				actualvHosts, ok := orgIDAPIvHostsMap[test.adapterInternalAPI.OrganizationID][identifier]
 				if !ok {

adapter/internal/oasparser/config_generator.go

@@ -87,7 +87,7 @@ func GetGlobalClusters() ([]*clusterv3.Cluster, []*corev3.Address) {
 // The provided set of envoy routes will be assigned under the virtual host
 //
 // The RouteConfiguration is named as "default"
-func GetProductionListener(gateway *gwapiv1b1.Gateway, resolvedListenerCerts map[string]map[string][]byte, gwLuaScript string) *listenerv3.Listener {
+func GetProductionListener(gateway *gwapiv1b1.Gateway, resolvedListenerCerts map[string]map[string][]byte, gwLuaScript string) []*listenerv3.Listener {
 	listeners := envoy.CreateListenerByGateway(gateway, resolvedListenerCerts, gwLuaScript)
 	return listeners
 }
@@ -98,10 +98,10 @@ func GetProductionListener(gateway *gwapiv1b1.Gateway, resolvedListenerCerts map
 // The provided set of envoy routes will be assigned under the virtual host
 //
 // The RouteConfiguration is named as "default"
-func GetRouteConfigs(vhostToRouteArrayMap map[string][]*routev3.Route, httpListener string,
+func GetRouteConfigs(vhostToRouteArrayMap map[string][]*routev3.Route, routeConfigName string,
 	customRateLimitPolicies []*model.CustomRateLimitPolicy) *routev3.RouteConfiguration {
 	vHosts := envoy.CreateVirtualHosts(vhostToRouteArrayMap, customRateLimitPolicies)
-	routeConfig := envoy.CreateRoutesConfigForRds(vHosts, httpListener)
+	routeConfig := envoy.CreateRoutesConfigForRds(vHosts, routeConfigName)
 	return routeConfig
 }
 
@@ -110,7 +110,7 @@ func GetRouteConfigs(vhostToRouteArrayMap map[string][]*routev3.Route, httpListe
 //
 // The returned resources are listeners, clusters, routeConfigurations, endpoints
 func GetCacheResources(endpoints []*corev3.Address, clusters []*clusterv3.Cluster,
-	listeners *listenerv3.Listener, routeConfig *routev3.RouteConfiguration) (
+	listeners []*listenerv3.Listener, routeConfigs []*routev3.RouteConfiguration) (
 	listenerRes []types.Resource, clusterRes []types.Resource, routeConfigRes []types.Resource,
 	endpointRes []types.Resource) {
 
@@ -122,8 +122,14 @@ func GetCacheResources(endpoints []*corev3.Address, clusters []*clusterv3.Cluste
 	for _, endpoint := range endpoints {
 		endpointRes = append(endpointRes, endpoint)
 	}
-	listenerRes = []types.Resource{listeners}
-	routeConfigRes = []types.Resource{routeConfig}
+	listenerRes = []types.Resource{}
+	for _, listener := range listeners {
+		listenerRes = append(listenerRes, listener)
+	}
+	routeConfigRes = []types.Resource{}
+	for _, routeConfig := range routeConfigs {
+		routeConfigRes = append(routeConfigRes, routeConfig)
+	}
 	return listenerRes, clusterRes, routeConfigRes, endpointRes
 }
 

adapter/internal/oasparser/envoyconf/constants.go

@@ -41,10 +41,6 @@ const (
 	compressorFilterName       string = "envoy.filters.http.compressor"
 )
 
-const (
-	defaultHTTPSListenerName string = "httpslistener"
-)
-
 // cluster prefixes
 const (
 	requestInterceptClustersNamePrefix  string = "reqInterceptor"