| /* |
| * 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. |
| */ |
| |
| package main |
| |
| import ( |
| "context" |
| "errors" |
| "fmt" |
| "os" |
| "os/signal" |
| "strconv" |
| "syscall" |
| "time" |
| |
| "github.com/opencord/voltha-go/rw_core/config" |
| c "github.com/opencord/voltha-go/rw_core/core" |
| "github.com/opencord/voltha-go/rw_core/utils" |
| "github.com/opencord/voltha-lib-go/v3/pkg/db/kvstore" |
| "github.com/opencord/voltha-lib-go/v3/pkg/kafka" |
| "github.com/opencord/voltha-lib-go/v3/pkg/log" |
| "github.com/opencord/voltha-lib-go/v3/pkg/probe" |
| "github.com/opencord/voltha-lib-go/v3/pkg/version" |
| ic "github.com/opencord/voltha-protos/v3/go/inter_container" |
| ) |
| |
| type rwCore struct { |
| kvClient kvstore.Client |
| config *config.RWCoreFlags |
| halted bool |
| exitChannel chan int |
| //kmp *kafka.KafkaMessagingProxy |
| kafkaClient kafka.Client |
| core *c.Core |
| //For test |
| receiverChannels []<-chan *ic.InterContainerMessage |
| } |
| |
| func init() { |
| _, err := log.AddPackage(log.JSON, log.DebugLevel, nil) |
| if err != nil { |
| log.Errorw("unable-to-register-package-to-the-log-map", log.Fields{"error": err}) |
| } |
| } |
| |
| func newKVClient(storeType string, address string, timeout int) (kvstore.Client, error) { |
| |
| log.Infow("kv-store-type", log.Fields{"store": storeType}) |
| switch storeType { |
| case "consul": |
| return kvstore.NewConsulClient(address, timeout) |
| case "etcd": |
| return kvstore.NewEtcdClient(address, timeout) |
| } |
| return nil, errors.New("unsupported-kv-store") |
| } |
| |
| func newKafkaClient(clientType string, host string, port int, instanceID string, livenessChannelInterval time.Duration) (kafka.Client, error) { |
| |
| log.Infow("kafka-client-type", log.Fields{"client": clientType}) |
| switch clientType { |
| case "sarama": |
| return kafka.NewSaramaClient( |
| kafka.Host(host), |
| kafka.Port(port), |
| kafka.ConsumerType(kafka.GroupCustomer), |
| kafka.ProducerReturnOnErrors(true), |
| kafka.ProducerReturnOnSuccess(true), |
| kafka.ProducerMaxRetries(6), |
| kafka.NumPartitions(3), |
| kafka.ConsumerGroupName(instanceID), |
| kafka.ConsumerGroupPrefix(instanceID), |
| kafka.AutoCreateTopic(true), |
| kafka.ProducerFlushFrequency(5), |
| kafka.ProducerRetryBackoff(time.Millisecond*30), |
| kafka.LivenessChannelInterval(livenessChannelInterval), |
| ), nil |
| } |
| return nil, errors.New("unsupported-client-type") |
| } |
| |
| func newRWCore(cf *config.RWCoreFlags) *rwCore { |
| var rwCore rwCore |
| rwCore.config = cf |
| rwCore.halted = false |
| rwCore.exitChannel = make(chan int, 1) |
| rwCore.receiverChannels = make([]<-chan *ic.InterContainerMessage, 0) |
| return &rwCore |
| } |
| |
| func (rw *rwCore) start(ctx context.Context, instanceID string) { |
| log.Info("Starting RW Core components") |
| |
| // Setup KV Client |
| log.Debugw("create-kv-client", log.Fields{"kvstore": rw.config.KVStoreType}) |
| var err error |
| if rw.kvClient, err = newKVClient( |
| rw.config.KVStoreType, |
| rw.config.KVStoreHost+":"+strconv.Itoa(rw.config.KVStorePort), |
| rw.config.KVStoreTimeout); err != nil { |
| log.Fatal(err) |
| } |
| |
| // Setup KV transaction context |
| if err := c.SetTransactionContext(instanceID, |
| rw.config.KVStoreDataPrefix+"/transactions/", |
| rw.kvClient, |
| rw.config.KVStoreTimeout); err != nil { |
| log.Fatal("creating-transaction-context-failed") |
| } |
| |
| // Setup Kafka Client |
| if rw.kafkaClient, err = newKafkaClient("sarama", |
| rw.config.KafkaAdapterHost, |
| rw.config.KafkaAdapterPort, |
| instanceID, |
| rw.config.LiveProbeInterval/2); err != nil { |
| log.Fatal("Unsupported-kafka-client") |
| } |
| |
| // Create the core service |
| rw.core = c.NewCore(ctx, instanceID, rw.config, rw.kvClient, rw.kafkaClient) |
| |
| // start the core |
| err = rw.core.Start(ctx) |
| if err != nil { |
| log.Fatalf("failed-to-start-rwcore", log.Fields{"error": err}) |
| } |
| } |
| |
| func (rw *rwCore) stop(ctx context.Context) { |
| // Stop leadership tracking |
| rw.halted = true |
| |
| // send exit signal |
| rw.exitChannel <- 0 |
| |
| // Cleanup - applies only if we had a kvClient |
| if rw.kvClient != nil { |
| // Release all reservations |
| if err := rw.kvClient.ReleaseAllReservations(ctx); err != nil { |
| log.Infow("fail-to-release-all-reservations", log.Fields{"error": err}) |
| } |
| // Close the DB connection |
| rw.kvClient.Close() |
| } |
| |
| rw.core.Stop(ctx) |
| |
| //if rw.kafkaClient != nil { |
| // rw.kafkaClient.Stop() |
| //} |
| } |
| |
| func waitForExit() int { |
| signalChannel := make(chan os.Signal, 1) |
| signal.Notify(signalChannel, |
| syscall.SIGHUP, |
| syscall.SIGINT, |
| syscall.SIGTERM, |
| syscall.SIGQUIT) |
| |
| exitChannel := make(chan int) |
| |
| go func() { |
| s := <-signalChannel |
| switch s { |
| case syscall.SIGHUP, |
| syscall.SIGINT, |
| syscall.SIGTERM, |
| syscall.SIGQUIT: |
| log.Infow("closing-signal-received", log.Fields{"signal": s}) |
| exitChannel <- 0 |
| default: |
| log.Infow("unexpected-signal-received", log.Fields{"signal": s}) |
| exitChannel <- 1 |
| } |
| }() |
| |
| code := <-exitChannel |
| return code |
| } |
| |
| func printBanner() { |
| fmt.Println(" ") |
| fmt.Println(" ______ ______ ") |
| fmt.Println("| _ \\ \\ / / ___|___ _ __ ___ ") |
| fmt.Println("| |_) \\ \\ /\\ / / | / _ \\| '__/ _ \\ ") |
| fmt.Println("| _ < \\ V V /| |__| (_) | | | __/ ") |
| fmt.Println("|_| \\_\\ \\_/\\_/ \\____\\___/|_| \\___| ") |
| fmt.Println(" ") |
| } |
| |
| func printVersion() { |
| fmt.Println("VOLTHA Read-Write Core") |
| fmt.Println(version.VersionInfo.String(" ")) |
| } |
| |
| func main() { |
| start := time.Now() |
| |
| cf := config.NewRWCoreFlags() |
| cf.ParseCommandArguments() |
| |
| // Set the instance ID as the hostname |
| var instanceID string |
| hostName := utils.GetHostName() |
| if len(hostName) > 0 { |
| instanceID = hostName |
| } else { |
| log.Fatal("HOSTNAME not set") |
| } |
| realMain() |
| //Setup default logger - applies for packages that do not have specific logger set |
| if _, err := log.SetDefaultLogger(log.JSON, cf.LogLevel, log.Fields{"instanceId": instanceID}); err != nil { |
| log.With(log.Fields{"error": err}).Fatal("Cannot setup logging") |
| } |
| |
| // Update all loggers (provisioned via init) with a common field |
| if err := log.UpdateAllLoggers(log.Fields{"instanceId": instanceID}); err != nil { |
| log.With(log.Fields{"error": err}).Fatal("Cannot setup logging") |
| } |
| |
| // Update all loggers to log level specified as input parameter |
| log.SetAllLogLevel(cf.LogLevel) |
| |
| //log.SetPackageLogLevel("github.com/opencord/voltha-go/rw_core/core", log.DebugLevel) |
| |
| defer func() { |
| err := log.CleanUp() |
| if err != nil { |
| log.Errorw("unable-to-flush-any-buffered-log-entries", log.Fields{"error": err}) |
| } |
| }() |
| |
| // Print version / build information and exit |
| if cf.DisplayVersionOnly { |
| printVersion() |
| return |
| } |
| |
| // Print banner if specified |
| if cf.Banner { |
| printBanner() |
| } |
| |
| log.Infow("rw-core-config", log.Fields{"config": *cf}) |
| |
| // Create the core |
| rw := newRWCore(cf) |
| |
| // Create a context adding the status update channel |
| ctx, cancel := context.WithCancel(context.Background()) |
| defer cancel() |
| |
| /* |
| * Create and start the liveness and readiness container management probes. This |
| * is done in the main function so just in case the main starts multiple other |
| * objects there can be a single probe end point for the process. |
| */ |
| p := &probe.Probe{} |
| go p.ListenAndServe(fmt.Sprintf("%s:%d", rw.config.ProbeHost, rw.config.ProbePort)) |
| |
| // Add the probe to the context to pass to all the services started |
| probeCtx := context.WithValue(ctx, probe.ProbeContextKey, p) |
| |
| // Start the core |
| go rw.start(probeCtx, instanceID) |
| |
| code := waitForExit() |
| log.Infow("received-a-closing-signal", log.Fields{"code": code}) |
| |
| // Cleanup before leaving |
| rw.stop(probeCtx) |
| |
| elapsed := time.Since(start) |
| log.Infow("rw-core-run-time", log.Fields{"core": instanceID, "time": elapsed / time.Second}) |
| } |