| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 xds |
| |
| import ( |
| "encoding/json" |
| "strconv" |
| ) |
| |
| import ( |
| xdsModel "github.com/dubbo-go-pixiu/pixiu-api/pkg/xds/model" |
| "gopkg.in/yaml.v2" |
| ) |
| |
| import ( |
| "github.com/apache/dubbo-go-pixiu/pkg/config/xds/apiclient" |
| "github.com/apache/dubbo-go-pixiu/pkg/logger" |
| "github.com/apache/dubbo-go-pixiu/pkg/model" |
| "github.com/apache/dubbo-go-pixiu/pkg/server/controls" |
| ) |
| |
| type LdsManager struct { |
| DiscoverApi |
| listenerMg controls.ListenerManager |
| } |
| |
| // Fetch overwrite DiscoverApi.Fetch. |
| func (l *LdsManager) Fetch() error { |
| r, err := l.DiscoverApi.Fetch("") //todo use local version |
| if err != nil { |
| return err |
| } |
| listeners := make([]*xdsModel.Listener, 0, len(r)) |
| for _, one := range r { |
| listener := &xdsModel.PixiuExtensionListeners{} |
| if err := one.To(listener); err != nil { |
| logger.Errorf("unknown resource of %s, expect Listener", one.GetName()) |
| continue |
| } |
| logger.Infof("listener xds server %v", listener) |
| listeners = append(listeners, listener.Listeners...) |
| } |
| l.setupListeners(listeners) |
| return nil |
| } |
| |
| func (l *LdsManager) Delta() error { |
| readCh, err := l.DiscoverApi.Delta() |
| if err != nil { |
| return err |
| } |
| go l.asyncHandler(readCh) |
| return nil |
| } |
| |
| func (l *LdsManager) asyncHandler(read chan *apiclient.DeltaResources) { |
| for delta := range read { |
| listeners := make([]*xdsModel.Listener, 0, len(delta.NewResources)) |
| for _, one := range delta.NewResources { |
| listener := &xdsModel.PixiuExtensionListeners{} |
| if err := one.To(listener); err != nil { |
| logger.Errorf("unknown resource of %s, expect Listener", one.GetName()) |
| continue |
| } |
| logger.Infof("listener xds server %v", listener) |
| listeners = append(listeners, listener.Listeners...) |
| } |
| |
| l.setupListeners(listeners) |
| } |
| } |
| |
| func (l *LdsManager) makeSocketAddress(address *xdsModel.SocketAddress) model.SocketAddress { |
| if address == nil { |
| return model.SocketAddress{} |
| } |
| return model.SocketAddress{ |
| Address: address.Address, |
| Port: int(address.Port), |
| ResolverName: address.ResolverName, |
| //Domains: _l.Address.do, todo add the domains |
| //CertsDir: _l.Address.SocketAddress"", //todo add the domains |
| } |
| } |
| |
| func (l *LdsManager) removeListeners(toRemoveHash map[string]struct{}) { |
| names := make([]string, 0, len(toRemoveHash)) |
| for name := range toRemoveHash { |
| names = append(names, name) |
| } |
| l.listenerMg.RemoveListener(names) |
| } |
| |
| // setupListeners setup listeners accord to dynamic resource |
| func (l *LdsManager) setupListeners(listeners []*xdsModel.Listener) { |
| //Make sure each one has a unique name like "host-port-protocol" |
| for _, v := range listeners { |
| v.Name = resolveListenerName(v.Address.SocketAddress.Address, int(v.Address.SocketAddress.Port), v.Protocol.String()) |
| } |
| |
| laterApplies := make([]func() error, 0, len(listeners)) |
| toRemoveHash := make(map[string]struct{}, len(listeners)) |
| |
| lm := l.listenerMg |
| activeListeners, err := lm.CloneXdsControlListener() |
| if err != nil { |
| logger.Errorf("Clone Xds Control Listener fail: %s", err) |
| return |
| } |
| //put all current listeners to $toRemoveHash |
| for _, v := range activeListeners { |
| //Make sure each one has a unique name like "host-port-protocol" |
| v.Name = resolveListenerName(v.Address.SocketAddress.Address, v.Address.SocketAddress.Port, v.ProtocolStr) |
| toRemoveHash[v.Name] = struct{}{} |
| } |
| |
| for _, listener := range listeners { |
| delete(toRemoveHash, listener.Name) |
| |
| modelListener := l.makeListener(listener) |
| // add or update later after removes |
| switch { |
| case lm.HasListener(modelListener.Name): |
| laterApplies = append(laterApplies, func() error { |
| return lm.UpdateListener(&modelListener) |
| }) |
| default: |
| laterApplies = append(laterApplies, func() error { |
| return lm.AddListener(&modelListener) |
| }) |
| } |
| } |
| // remove the listeners first to prevent tcp port conflict |
| l.removeListeners(toRemoveHash) |
| //do update and add new cluster. |
| for _, fn := range laterApplies { |
| if err := fn(); err != nil { |
| logger.Errorf("can not modify listener", err) |
| } |
| } |
| } |
| |
| func resolveListenerName(host string, port int, protocol string) string { |
| return host + "-" + strconv.Itoa(port) + "-" + protocol |
| } |
| |
| func (l *LdsManager) makeListener(listener *xdsModel.Listener) model.Listener { |
| return model.Listener{ |
| Name: listener.Name, |
| ProtocolStr: listener.Protocol.String(), |
| Protocol: model.ProtocolType(model.ProtocolTypeValue[listener.Protocol.String()]), |
| Address: l.makeAddress(listener.Address), |
| FilterChain: l.makeFilterChain(listener.FilterChain), |
| Config: nil, // todo set the additional config |
| } |
| } |
| |
| func (l *LdsManager) makeFilterChain(fChain *xdsModel.FilterChain) model.FilterChain { |
| return model.FilterChain{ |
| Filters: l.makeFilters(fChain.Filters), |
| } |
| } |
| |
| func (l *LdsManager) makeFilters(filters []*xdsModel.NetworkFilter) []model.NetworkFilter { |
| result := make([]model.NetworkFilter, 0, len(filters)) |
| for _, filter := range filters { |
| result = append(result, model.NetworkFilter{ |
| Name: filter.Name, |
| //Config: filter., todo define the config of filter |
| Config: l.makeConfig(filter), |
| }) |
| } |
| return result |
| } |
| |
| func (l *LdsManager) makeConfig(filter *xdsModel.NetworkFilter) (m map[string]interface{}) { |
| switch cfg := filter.Config.(type) { |
| case *xdsModel.NetworkFilter_Yaml: |
| if err := yaml.Unmarshal([]byte(cfg.Yaml.Content), &m); err != nil { |
| logger.Errorf("can not make yaml from filter.Config: %s", cfg.Yaml.Content, err) |
| } |
| case *xdsModel.NetworkFilter_Json: |
| if err := json.Unmarshal([]byte(cfg.Json.Content), &m); err != nil { |
| logger.Errorf("can not make json from filter.Config: %s", cfg.Json.Content, err) |
| } |
| case *xdsModel.NetworkFilter_Struct: |
| m = cfg.Struct.AsMap() |
| default: |
| logger.Errorf("can not get filter config of %s", filter.Name) |
| } |
| return |
| } |
| |
| func (l *LdsManager) makeAddress(addr *xdsModel.Address) model.Address { |
| if addr == nil { |
| return model.Address{} |
| } |
| return model.Address{ |
| SocketAddress: l.makeSocketAddress(addr.SocketAddress), |
| Name: addr.Name, |
| } |
| } |