blob: a31b520ec982d4ef7ca97322ccc84eaf50191e01 [file] [log] [blame]
/*
* 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 invokes the application
package main
import (
"context"
"errors"
"fmt"
"os"
"os/signal"
"strconv"
"syscall"
"time"
"github.com/opencord/voltha-lib-go/v3/pkg/adapters/adapterif"
"github.com/opencord/voltha-lib-go/v3/pkg/adapters"
com "github.com/opencord/voltha-lib-go/v3/pkg/adapters/common"
conf "github.com/opencord/voltha-lib-go/v3/pkg/config"
"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"
"github.com/opencord/voltha-openolt-adapter/internal/pkg/config"
ac "github.com/opencord/voltha-openolt-adapter/internal/pkg/core"
ic "github.com/opencord/voltha-protos/v3/go/inter_container"
"github.com/opencord/voltha-protos/v3/go/voltha"
)
type adapter struct {
instanceID string
config *config.AdapterFlags
iAdapter adapters.IAdapter
kafkaClient kafka.Client
kvClient kvstore.Client
kip kafka.InterContainerProxy
coreProxy adapterif.CoreProxy
adapterProxy adapterif.AdapterProxy
eventProxy adapterif.EventProxy
halted bool
exitChannel chan int
receiverChannels []<-chan *ic.InterContainerMessage
}
func newAdapter(cf *config.AdapterFlags) *adapter {
var a adapter
a.instanceID = cf.InstanceID
a.config = cf
a.halted = false
a.exitChannel = make(chan int, 1)
a.receiverChannels = make([]<-chan *ic.InterContainerMessage, 0)
return &a
}
func (a *adapter) start(ctx context.Context) {
logger.Info("Starting Core Adapter components")
var err error
var p *probe.Probe
if value := ctx.Value(probe.ProbeContextKey); value != nil {
if _, ok := value.(*probe.Probe); ok {
p = value.(*probe.Probe)
p.RegisterService(
"message-bus",
"kv-store",
"container-proxy",
"core-request-handler",
"register-with-core",
)
}
}
// Setup KV Client
logger.Debugw("create-kv-client", log.Fields{"kvstore": a.config.KVStoreType})
if err = a.setKVClient(); err != nil {
logger.Fatalw("error-setting-kv-client", log.Fields{"error": err})
}
if p != nil {
p.UpdateStatus("kv-store", probe.ServiceStatusRunning)
}
// Setup Log Config
cm := conf.NewConfigManager(a.kvClient, a.config.KVStoreType, a.config.KVStoreHost, a.config.KVStorePort, a.config.KVStoreTimeout)
go conf.StartLogLevelConfigProcessing(cm, ctx)
// Setup Kafka Client
if a.kafkaClient, err = newKafkaClient("sarama", a.config.KafkaAdapterHost, a.config.KafkaAdapterPort); err != nil {
logger.Fatalw("Unsupported-common-client", log.Fields{"error": err})
}
if p != nil {
p.UpdateStatus("message-bus", probe.ServiceStatusRunning)
}
// Start the common InterContainer Proxy - retries indefinitely
if a.kip, err = a.startInterContainerProxy(ctx, -1); err != nil {
logger.Fatal("error-starting-inter-container-proxy")
}
// Create the core proxy to handle requests to the Core
a.coreProxy = com.NewCoreProxy(a.kip, a.config.Topic, a.config.CoreTopic)
// Create the adaptor proxy to handle request between olt and onu
a.adapterProxy = com.NewAdapterProxy(a.kip, "brcm_openomci_onu", a.config.CoreTopic)
// Create the event proxy to post events to KAFKA
a.eventProxy = com.NewEventProxy(com.MsgClient(a.kafkaClient), com.MsgTopic(kafka.Topic{Name: a.config.EventTopic}))
// Create the open OLT adapter
if a.iAdapter, err = a.startOpenOLT(ctx, a.kip, a.coreProxy, a.adapterProxy, a.eventProxy, a.config); err != nil {
logger.Fatalw("error-starting-openolt", log.Fields{"error": err})
}
// Register the core request handler
if err = a.setupRequestHandler(ctx, a.instanceID, a.iAdapter); err != nil {
logger.Fatalw("error-setting-core-request-handler", log.Fields{"error": err})
}
// Register this adapter to the Core - retries indefinitely
if err = a.registerWithCore(ctx, -1); err != nil {
logger.Fatal("error-registering-with-core")
}
// check the readiness and liveliness and update the probe status
a.checkServicesReadiness(ctx)
}
/**
This function checks the liveliness and readiness of the kakfa and kv-client services
and update the status in the probe.
*/
func (a *adapter) checkServicesReadiness(ctx context.Context) {
// checks the kafka readiness
go a.checkKafkaReadiness(ctx)
// checks the kv-store readiness
go a.checkKvStoreReadiness(ctx)
}
/**
This function checks the liveliness and readiness of the kv-store service
and update the status in the probe.
*/
func (a *adapter) checkKvStoreReadiness(ctx context.Context) {
// dividing the live probe interval by 2 to get updated status every 30s
timeout := a.config.LiveProbeInterval / 2
kvStoreChannel := make(chan bool, 1)
// Default false to check the liveliness.
kvStoreChannel <- false
for {
timeoutTimer := time.NewTimer(timeout)
select {
case liveliness := <-kvStoreChannel:
if !liveliness {
// kv-store not reachable or down, updating the status to not ready state
probe.UpdateStatusFromContext(ctx, "kv-store", probe.ServiceStatusNotReady)
timeout = a.config.NotLiveProbeInterval
} else {
// kv-store is reachable , updating the status to running state
probe.UpdateStatusFromContext(ctx, "kv-store", probe.ServiceStatusRunning)
timeout = a.config.LiveProbeInterval / 2
}
// Check if the timer has expired or not
if !timeoutTimer.Stop() {
<-timeoutTimer.C
}
case <-timeoutTimer.C:
// Check the status of the kv-store. Use timeout of 2 seconds to avoid forever blocking
logger.Info("kv-store liveliness-recheck")
timeoutCtx, cancelFunc := context.WithTimeout(ctx, 2*time.Second)
kvStoreChannel <- a.kvClient.IsConnectionUp(timeoutCtx)
// Cleanup cancel func resources
cancelFunc()
}
}
}
/**
This function checks the liveliness and readiness of the kafka service
and update the status in the probe.
*/
func (a *adapter) checkKafkaReadiness(ctx context.Context) {
livelinessChannel := a.kafkaClient.EnableLivenessChannel(true)
healthinessChannel := a.kafkaClient.EnableHealthinessChannel(true)
timeout := a.config.LiveProbeInterval
failed := false
for {
timeoutTimer := time.NewTimer(timeout)
select {
case healthiness := <-healthinessChannel:
if !healthiness {
// This will eventually cause K8s to restart the container, and will do
// so in a way that allows cleanup to continue, rather than an immediate
// panic and exit here.
probe.UpdateStatusFromContext(ctx, "message-bus", probe.ServiceStatusFailed)
failed = true
}
// Check if the timer has expired or not
if !timeoutTimer.Stop() {
<-timeoutTimer.C
}
case liveliness := <-livelinessChannel:
if failed {
// Failures of the message bus are permanent and can't ever be recovered from,
// so make sure we never inadvertently reset a failed state back to unready.
} else if !liveliness {
// kafka not reachable or down, updating the status to not ready state
probe.UpdateStatusFromContext(ctx, "message-bus", probe.ServiceStatusNotReady)
timeout = a.config.NotLiveProbeInterval
} else {
// kafka is reachable , updating the status to running state
probe.UpdateStatusFromContext(ctx, "message-bus", probe.ServiceStatusRunning)
timeout = a.config.LiveProbeInterval
}
// Check if the timer has expired or not
if !timeoutTimer.Stop() {
<-timeoutTimer.C
}
case <-timeoutTimer.C:
logger.Info("kafka-proxy-liveness-recheck")
// send the liveness probe in a goroutine; we don't want to deadlock ourselves as
// the liveness probe may wait (and block) writing to our channel.
err := a.kafkaClient.SendLiveness()
if err != nil {
// Catch possible error case if sending liveness after Sarama has been stopped.
logger.Warnw("error-kafka-send-liveness", log.Fields{"error": err})
}
}
}
}
func (a *adapter) stop(ctx context.Context) {
// Stop leadership tracking
a.halted = true
// send exit signal
a.exitChannel <- 0
// Cleanup - applies only if we had a kvClient
if a.kvClient != nil {
// Release all reservations
if err := a.kvClient.ReleaseAllReservations(ctx); err != nil {
logger.Infow("fail-to-release-all-reservations", log.Fields{"error": err})
}
// Close the DB connection
a.kvClient.Close()
}
if a.kip != nil {
a.kip.Stop()
}
// TODO: More cleanup
}
func newKVClient(storeType, address string, timeout int) (kvstore.Client, error) {
logger.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, host string, port int) (kafka.Client, error) {
logger.Infow("common-client-type", log.Fields{"client": clientType})
switch clientType {
case "sarama":
return kafka.NewSaramaClient(
kafka.Host(host),
kafka.Port(port),
kafka.ProducerReturnOnErrors(true),
kafka.ProducerReturnOnSuccess(true),
kafka.ProducerMaxRetries(6),
kafka.ProducerRetryBackoff(time.Millisecond*30),
kafka.MetadatMaxRetries(15)), nil
}
return nil, errors.New("unsupported-client-type")
}
func (a *adapter) setKVClient() error {
addr := a.config.KVStoreHost + ":" + strconv.Itoa(a.config.KVStorePort)
client, err := newKVClient(a.config.KVStoreType, addr, a.config.KVStoreTimeout)
if err != nil {
a.kvClient = nil
return err
}
a.kvClient = client
return nil
}
func (a *adapter) startInterContainerProxy(ctx context.Context, retries int) (kafka.InterContainerProxy, error) {
logger.Infow("starting-intercontainer-messaging-proxy", log.Fields{"host": a.config.KafkaAdapterHost,
"port": a.config.KafkaAdapterPort, "topic": a.config.Topic})
var err error
kip := kafka.NewInterContainerProxy(
kafka.InterContainerHost(a.config.KafkaAdapterHost),
kafka.InterContainerPort(a.config.KafkaAdapterPort),
kafka.MsgClient(a.kafkaClient),
kafka.DefaultTopic(&kafka.Topic{Name: a.config.Topic}))
count := 0
for {
if err = kip.Start(); err != nil {
logger.Warnw("error-starting-messaging-proxy", log.Fields{"error": err})
if retries == count {
return nil, err
}
count = +1
// Take a nap before retrying
time.Sleep(2 * time.Second)
} else {
break
}
}
probe.UpdateStatusFromContext(ctx, "container-proxy", probe.ServiceStatusRunning)
logger.Info("common-messaging-proxy-created")
return kip, nil
}
func (a *adapter) startOpenOLT(ctx context.Context, kip kafka.InterContainerProxy,
cp adapterif.CoreProxy, ap adapterif.AdapterProxy, ep adapterif.EventProxy,
cfg *config.AdapterFlags) (*ac.OpenOLT, error) {
logger.Info("starting-open-olt")
var err error
sOLT := ac.NewOpenOLT(ctx, a.kip, cp, ap, ep, cfg)
if err = sOLT.Start(ctx); err != nil {
return nil, err
}
logger.Info("open-olt-started")
return sOLT, nil
}
func (a *adapter) setupRequestHandler(ctx context.Context, coreInstanceID string, iadapter adapters.IAdapter) error {
logger.Info("setting-request-handler")
requestProxy := com.NewRequestHandlerProxy(coreInstanceID, iadapter, a.coreProxy)
if err := a.kip.SubscribeWithRequestHandlerInterface(kafka.Topic{Name: a.config.Topic}, requestProxy); err != nil {
return err
}
probe.UpdateStatusFromContext(ctx, "core-request-handler", probe.ServiceStatusRunning)
logger.Info("request-handler-setup-done")
return nil
}
func (a *adapter) registerWithCore(ctx context.Context, retries int) error {
logger.Info("registering-with-core")
adapterDescription := &voltha.Adapter{Id: "openolt", // Unique name for the device type
Vendor: "VOLTHA OpenOLT",
Version: version.VersionInfo.Version}
types := []*voltha.DeviceType{{Id: "openolt",
Adapter: "openolt", // Name of the adapter that handles device type
AcceptsBulkFlowUpdate: false, // Currently openolt adapter does not support bulk flow handling
AcceptsAddRemoveFlowUpdates: true}}
deviceTypes := &voltha.DeviceTypes{Items: types}
count := 0
for {
if err := a.coreProxy.RegisterAdapter(context.TODO(), adapterDescription, deviceTypes); err != nil {
logger.Warnw("registering-with-core-failed", log.Fields{"error": err})
if retries == count {
return err
}
count++
// Take a nap before retrying
time.Sleep(2 * time.Second)
} else {
break
}
}
probe.UpdateStatusFromContext(ctx, "register-with-core", probe.ServiceStatusRunning)
logger.Info("registered-with-core")
return nil
}
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:
logger.Infow("closing-signal-received", log.Fields{"signal": s})
exitChannel <- 0
default:
logger.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(` | |__| | |_) | __/ | | || |__| | |____| | `)
fmt.Println(` \____/| .__/ \___|_| |_| \____/|______|_| `)
fmt.Println(` | | `)
fmt.Println(` |_| `)
fmt.Println(` `)
}
func printVersion() {
fmt.Println("VOLTHA OpenOLT Adapter")
fmt.Println(version.VersionInfo.String(" "))
}
func main() {
start := time.Now()
cf := config.NewAdapterFlags()
cf.ParseCommandArguments()
// Setup logging
logLevel, err := log.StringToLogLevel(cf.LogLevel)
if err != nil {
logger.Fatalf("Cannot setup logging, %s", err)
}
// Setup default logger - applies for packages that do not have specific logger set
if _, err := log.SetDefaultLogger(log.JSON, logLevel, log.Fields{"instanceId": cf.InstanceID}); err != nil {
log.With(log.Fields{"error": err}).Fatal("Cannot setup logging")
}
// Update all loggers (provisionned via init) with a common field
if err := log.UpdateAllLoggers(log.Fields{"instanceId": cf.InstanceID}); err != nil {
log.With(log.Fields{"error": err}).Fatal("Cannot setup logging")
}
log.SetAllLogLevel(logLevel)
realMain()
defer log.CleanUp()
// Print version / build information and exit
if cf.DisplayVersionOnly {
printVersion()
return
}
// Print banner if specified
if cf.Banner {
printBanner()
}
logger.Infow("config", log.Fields{"config": *cf})
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
ad := newAdapter(cf)
p := &probe.Probe{}
go p.ListenAndServe(fmt.Sprintf("%s:%d", ad.config.ProbeHost, ad.config.ProbePort))
probeCtx := context.WithValue(ctx, probe.ProbeContextKey, p)
go ad.start(probeCtx)
code := waitForExit()
logger.Infow("received-a-closing-signal", log.Fields{"code": code})
// Cleanup before leaving
ad.stop(ctx)
elapsed := time.Since(start)
logger.Infow("run-time", log.Fields{"instanceId": ad.config.InstanceID, "time": elapsed / time.Second})
}