| /* |
| * Copyright 2018-present Open Networking Foundation |
| |
| * 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. |
| */ |
| // gRPC affinity router with active/active backends |
| |
| package afrouter |
| |
| // Command line parameters and parsing |
| import ( |
| "os" |
| "fmt" |
| "flag" |
| "path" |
| "errors" |
| "io/ioutil" |
| "encoding/json" |
| "github.com/opencord/voltha-go/common/log" |
| ) |
| |
| func ParseCmd() (*Configuration, error) { |
| config := &Configuration{} |
| cmdParse := flag.NewFlagSet(path.Base(os.Args[0]), flag.ContinueOnError); |
| config.ConfigFile = cmdParse.String("config", "arouter.json", "The configuration file for the affinity router") |
| config.LogLevel = cmdParse.Int("logLevel", 0, "The log level for the affinity router") |
| config.GrpcLog = cmdParse.Bool("grpclog", false, "Enable GRPC logging") |
| |
| err := cmdParse.Parse(os.Args[1:]); |
| if err != nil { |
| //return err |
| return nil, errors.New("Error parsing the command line"); |
| } |
| //if(!cmdParse.Parsed()) { |
| //} |
| return config, nil |
| } |
| |
| // Configuration file loading and parsing |
| type Configuration struct { |
| ConfigFile * string |
| LogLevel * int |
| GrpcLog * bool |
| Servers []ServerConfig `json:"servers"` |
| Ports PortConfig `json:"ports"` |
| ServerCertificates ServerCertConfig `json:"serverCertificates"` |
| ClientCertificates ClientCertConfig `json:"clientCertificates"` |
| BackendClusters []BackendClusterConfig `json:"backend_clusters"` |
| Routers []RouterConfig `json:"routers"` |
| Api ApiConfig |
| } |
| |
| type RouterConfig struct { |
| Name string `json:"name"` |
| ProtoService string `json:"service"` |
| ProtoPackage string `json:"package"` |
| Routes []RouteConfig `json:"routes"` |
| } |
| |
| type RouteConfig struct { |
| Name string `json:"name"` |
| Type string `json:"type"` |
| ProtoFile string `json:"proto_descriptor"` |
| Association string `json:"association"` |
| RouteField string `json:"routing_field"` |
| Methods []string `json:"methods"` // The GRPC methods to route using the route field |
| NbBindingMethods []string `json:"nb_binding_methods"` |
| BackendCluster string `json:"backend_cluster"` |
| Binding BindingConfig `json:"binding"` |
| Overrides []OverrideConfig `json:"overrides"` |
| backendCluster *BackendClusterConfig |
| } |
| |
| type BindingConfig struct { |
| Type string `json:"type"` |
| Field string `json:"field"` |
| Method string `json:"method"` |
| Association string `json:"association"` |
| |
| } |
| |
| type OverrideConfig struct { |
| Methods []string `json:"methods"` |
| Method string `json:"method"` |
| RouteField string `json:"routing_field"` |
| } |
| |
| // Backend configuration |
| |
| type BackendClusterConfig struct { |
| Name string `json:"name"` |
| Backends []BackendConfig `json:"backends"` |
| } |
| |
| type BackendConfig struct { |
| Name string `json:"name"` |
| Type string `json:"type"` |
| Association AssociationConfig `json:"association"` |
| Connections []ConnectionConfig `json:"connections"` |
| } |
| |
| type AssociationConfig struct { |
| Strategy string `json:"strategy"` |
| Location string `json:"location"` |
| Field string `json:"field"` |
| Key string `json:"key"` |
| } |
| |
| type ConnectionConfig struct { |
| Name string `json:"name"` |
| Addr string `json:"addr"` |
| Port string `json:"port"` |
| } |
| |
| // Server configuration |
| |
| type ServerConfig struct { |
| Name string `json:"name"` |
| Port uint `json:"port"` |
| Addr string `json:"address"` |
| Type string `json:"type"` |
| Routers []RouterPackage `json:"routers"` |
| routers map[string]*RouterConfig |
| } |
| |
| type RouterPackage struct { |
| Router string `json:"router"` |
| Package string `json:"package"` |
| } |
| |
| // Port configuration |
| type PortConfig struct { |
| GrpcPort uint `json:"grpcPort"` |
| StreamingGrpcPort uint `json:"streamingGrpcPort"` |
| TlsGrpcPort uint `json:"tlsGrpcPort"` |
| TlsStreamingGrpcPort uint `json:"tlsStreamingGrpcPort"` |
| ControlPort uint `json:"controlPort"` |
| } |
| |
| // Server Certificate configuration |
| type ServerCertConfig struct { |
| GrpcCert string `json:"grpcCertificate"` // File path to the certificate file |
| GrpcKey string `json:"grpcKey"` // File path to the key file |
| GrpcCsr string `json:"grpcCsr"` // File path to the CSR file |
| } |
| |
| // Client Certificate configuration |
| type ClientCertConfig struct { |
| GrpcCert string `json:"grpcCertificate"` // File path to the certificate file |
| GrpcKey string `json:"grpcKey"` // File path to the key file |
| GrpcCsr string `json:"grpcCsr"` // File path to the CSR file |
| } |
| |
| // Api configuration |
| type ApiConfig struct { |
| Addr string `json:"address"` |
| Port uint `json:"port"` |
| } |
| |
| func (conf * Configuration) LoadConfig() error { |
| |
| configF, err := os.Open(*conf.ConfigFile); |
| log.Info("Loading configuration from: ", *conf.ConfigFile) |
| if err != nil { |
| log.Error(err) |
| return err |
| } |
| |
| defer configF.Close() |
| |
| configBytes, err := ioutil.ReadAll(configF) |
| if err != nil { |
| log.Error(err) |
| return err |
| } |
| |
| if err := json.Unmarshal(configBytes, conf); err != nil { |
| log.Errorf("Unmarshaling of the configuratino file failed: %v", err) |
| return err |
| } |
| |
| // Now resolve references to different config objects in the |
| // config file. Currently there are 2 possible references |
| // to resolve: referecnes to routers in the servers, and |
| // references to backend_cluster in the routers. |
| |
| // Resolve router references for the servers |
| log.Debug("Resolving references in the config file"); |
| for k,_ := range conf.Servers { |
| //s.routers =make(map[string]*RouterConfig) |
| conf.Servers[k].routers = make(map[string]*RouterConfig) |
| for _,rPkg := range conf.Servers[k].Routers { |
| var found bool = false |
| // Locate the router "r" in the top lever Routers array |
| log.Debugf("Resolving router reference to router '%s' from server '%s'",rPkg.Router, conf.Servers[k].Name) |
| for rk, _ := range conf.Routers { |
| if conf.Routers[rk].Name == rPkg.Router && !found { |
| log.Debugf("Reference to router '%s' found for package '%s'", rPkg.Router, rPkg.Package) |
| conf.Servers[k].routers[rPkg.Package] = &conf.Routers[rk] |
| found = true |
| } else if conf.Routers[rk].Name == rPkg.Router && found { |
| if _,ok := conf.Servers[k].routers[rPkg.Package]; !ok { |
| log.Debugf("Reference to router '%s' found for package '%s'", rPkg.Router, rPkg.Package) |
| conf.Servers[k].routers[rPkg.Package] = &conf.Routers[rk] |
| } else { |
| err := errors.New(fmt.Sprintf("Duplicate router '%s' defined for package '%s'",rPkg.Router, rPkg.Package)) |
| log.Error(err) |
| return err |
| } |
| } |
| } |
| if !found { |
| err := errors.New(fmt.Sprintf("Router %s for server %s not found in config", conf.Servers[k].Name, rPkg.Router)) |
| log.Error(err) |
| return err |
| } |
| } |
| } |
| |
| // Resolve backend references for the routers |
| for rk,rv := range conf.Routers { |
| for rtk,rtv := range rv.Routes { |
| var found bool = false |
| log.Debugf("Resolving backend reference to %s from router %s",rtv.BackendCluster, rv.Name) |
| for bek,bev := range conf.BackendClusters { |
| log.Debugf("Checking cluster %s", conf.BackendClusters[bek].Name) |
| if rtv.BackendCluster == bev.Name && !found { |
| conf.Routers[rk].Routes[rtk].backendCluster = &conf.BackendClusters[bek] |
| found = true |
| } else if rtv.BackendCluster == bev.Name && found { |
| err := errors.New(fmt.Sprintf("Duplicate backend defined, %s",conf.BackendClusters[bek].Name)) |
| log.Error(err) |
| return err |
| } |
| } |
| if !found { |
| err := errors.New(fmt.Sprintf("Backend %s for router %s not found in config", |
| rtv.BackendCluster, rv.Name)) |
| log.Error(err) |
| return err |
| } |
| } |
| } |
| |
| |
| return nil |
| } |