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/*
* Copyright 2019-present Ciena Corporation
*
* 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 commands
import (
"encoding/json"
"errors"
"fmt"
"github.com/Shopify/sarama"
"github.com/golang/protobuf/jsonpb"
"github.com/golang/protobuf/proto"
"github.com/golang/protobuf/ptypes"
"github.com/golang/protobuf/ptypes/timestamp"
flags "github.com/jessevdk/go-flags"
"github.com/opencord/voltctl/pkg/filter"
"github.com/opencord/voltctl/pkg/format"
"github.com/opencord/voltha-protos/v4/go/voltha"
"log"
"os"
"os/signal"
"strings"
"time"
)
const (
DEFAULT_EVENT_FORMAT = "table{{.Category}}\t{{.SubCategory}}\t{{.Type}}\t{{.Timestamp}}\t{{.Device_ids}}\t{{.Titles}}"
)
type EventListenOpts struct {
Format string `long:"format" value-name:"FORMAT" default:"" description:"Format to use to output structured data"`
// nolint: staticcheck
OutputAs string `short:"o" long:"outputas" default:"table" choice:"table" choice:"json" choice:"yaml" description:"Type of output to generate"`
Filter string `short:"f" long:"filter" default:"" value-name:"FILTER" description:"Only display results that match filter"`
Follow bool `short:"F" long:"follow" description:"Continue to consume until CTRL-C is pressed"`
ShowBody bool `short:"b" long:"show-body" description:"Show body of events rather than only a header summary"`
Count int `short:"c" long:"count" default:"-1" value-name:"LIMIT" description:"Limit the count of messages that will be printed"`
Now bool `short:"n" long:"now" description:"Stop printing events when current time is reached"`
Timeout int `short:"t" long:"idle" default:"900" value-name:"SECONDS" description:"Timeout if no message received within specified seconds"`
Since string `short:"s" long:"since" default:"" value-name:"TIMESTAMP" description:"Do not show entries before timestamp"`
}
type EventOpts struct {
EventListen EventListenOpts `command:"listen"`
}
var eventOpts = EventOpts{}
type EventHeader struct {
Category string `json:"category"`
SubCategory string `json:"sub_category"`
Type string `json:"type"`
Raised_ts time.Time `json:"raised_ts"`
Reported_ts time.Time `json:"reported_ts"`
Device_ids []string `json:"device_ids"` // Opportunistically collected list of device_ids
Titles []string `json:"titles"` // Opportunistically collected list of titles
Timestamp time.Time `json:"timestamp"` // Timestamp from Kafka
}
type EventHeaderWidths struct {
Category int
SubCategory int
Type int
Raised_ts int
Reported_ts int
Device_ids int
Titles int
Timestamp int
}
var DefaultWidths EventHeaderWidths = EventHeaderWidths{
Category: 13,
SubCategory: 3,
Type: 12,
Raised_ts: 10,
Reported_ts: 10,
Device_ids: 40,
Titles: 40,
Timestamp: 10,
}
func RegisterEventCommands(parent *flags.Parser) {
_, err := parent.AddCommand("event", "event commands", "Commands for observing events", &eventOpts)
if err != nil {
Error.Fatalf("Unable to register event commands with voltctl command parser: %s", err.Error())
}
}
func ParseSince(s string) (*time.Time, error) {
if strings.EqualFold(s, "now") {
since := time.Now()
return &since, nil
}
rfc3339Time, err := time.Parse(time.RFC3339, s)
if err == nil {
return &rfc3339Time, nil
}
duration, err := time.ParseDuration(s)
if err == nil {
since := time.Now().Add(-duration)
return &since, nil
}
return nil, fmt.Errorf("Unable to parse time specification `%s`. Please use either `now`, a duration, or an RFC3339-compliant string", s)
}
// Convert a timestamp field in an event to a time.Time
func DecodeTimestamp(tsIntf interface{}) (time.Time, error) {
ts, okay := tsIntf.(*timestamp.Timestamp)
if okay {
// Voltha-Protos 3.2.3 and above
result, err := ptypes.Timestamp(ts)
return result, err
}
tsFloat, okay := tsIntf.(float32)
if okay {
// Voltha-Protos 3.2.2 and below
return time.Unix(int64(tsFloat), 0), nil
}
tsInt64, okay := tsIntf.(int64)
if okay {
if tsInt64 > 10000000000000 {
// sometimes it's in nanoseconds
return time.Unix(tsInt64/1000000000, tsInt64%1000000000), nil
} else {
// sometimes it's in seconds
return time.Unix(tsInt64/1000, 0), nil
}
}
return time.Time{}, errors.New("Failed to decode timestamp")
}
// Extract the header, as well as a few other items that might be of interest
func DecodeHeader(b []byte, ts time.Time) (*EventHeader, error) {
m := &voltha.Event{}
if err := proto.Unmarshal(b, m); err != nil {
return nil, err
}
header := m.Header
cat := voltha.EventCategory_Types_name[int32(header.Category)]
subCat := voltha.EventSubCategory_Types_name[int32(header.SubCategory)]
evType := voltha.EventType_Types_name[int32(header.Type)]
raised, err := DecodeTimestamp(header.RaisedTs)
if err != nil {
return nil, err
}
reported, err := DecodeTimestamp(header.ReportedTs)
if err != nil {
return nil, err
}
// Opportunistically try to extract the device_id and title from a kpi_event2
// note that there might actually be multiple_slice data, so there could
// be multiple device_id, multiple title, etc.
device_ids := make(map[string]interface{})
titles := make(map[string]interface{})
kpi := m.GetKpiEvent2()
if kpi != nil {
sliceList := kpi.SliceData
if len(sliceList) > 0 {
slice := sliceList[0]
if slice != nil {
metadata := slice.Metadata
deviceId := metadata.DeviceId
device_ids[deviceId] = slice
title := metadata.Title
titles[title] = slice
}
}
}
// Opportunistically try to pull a resource_id and title from a DeviceEvent
// There can only be one resource_id and title from a DeviceEvent, so it's easier
// than dealing with KPI_EVENT2.
deviceEvent := m.GetDeviceEvent()
if deviceEvent != nil {
titles[deviceEvent.DeviceEventName] = deviceEvent
device_ids[deviceEvent.ResourceId] = deviceEvent
}
device_id_keys := make([]string, len(device_ids))
i := 0
for k := range device_ids {
device_id_keys[i] = k
i++
}
title_keys := make([]string, len(titles))
i = 0
for k := range titles {
title_keys[i] = k
i++
}
evHeader := EventHeader{Category: cat,
SubCategory: subCat,
Type: evType,
Raised_ts: raised,
Reported_ts: reported,
Device_ids: device_id_keys,
Timestamp: ts,
Titles: title_keys}
return &evHeader, nil
}
// Print the full message, either in JSON or in GRPCURL-human-readable format,
// depending on which grpcurl formatter is passed in.
func PrintMessage(outputAs string, b []byte) error {
ms := &voltha.Event{}
if err := proto.Unmarshal(b, ms); err != nil {
return err
}
if outputAs == "json" {
marshaler := jsonpb.Marshaler{EmitDefaults: true, AnyResolver: &VolthaAnyResolver{}}
asJson, err := marshaler.MarshalToString(ms)
if err != nil {
return fmt.Errorf("Failed to marshal the json: %s", err)
}
fmt.Println(asJson)
} else {
// print in golang native format
fmt.Printf("%v\n", ms)
}
return nil
}
// Print just the enriched EventHeader. This is either in JSON format, or in
// table format.
func PrintEventHeader(outputAs string, outputFormat string, hdr *EventHeader) error {
if outputAs == "json" {
asJson, err := json.Marshal(hdr)
if err != nil {
return fmt.Errorf("Error marshalling JSON: %v", err)
} else {
fmt.Printf("%s\n", asJson)
}
} else {
f := format.Format(outputFormat)
output, err := f.ExecuteFixedWidth(DefaultWidths, false, *hdr)
if err != nil {
return err
}
fmt.Printf("%s\n", output)
}
return nil
}
// Start output, print any column headers or other start characters
func (options *EventListenOpts) StartOutput(outputFormat string) error {
if options.OutputAs == "json" {
fmt.Println("[")
} else if (options.OutputAs == "table") && !options.ShowBody {
f := format.Format(outputFormat)
output, err := f.ExecuteFixedWidth(DefaultWidths, true, nil)
if err != nil {
return err
}
fmt.Println(output)
}
return nil
}
// Finish output, print any column footers or other end characters
func (options *EventListenOpts) FinishOutput() {
if options.OutputAs == "json" {
fmt.Println("]")
}
}
func (options *EventListenOpts) Execute(args []string) error {
ProcessGlobalOptions()
if GlobalConfig.Kafka == "" {
return errors.New("Kafka address is not specified")
}
config := sarama.NewConfig()
config.ClientID = "go-kafka-consumer"
config.Consumer.Return.Errors = true
config.Version = sarama.V1_0_0_0
brokers := []string{GlobalConfig.Kafka}
client, err := sarama.NewClient(brokers, config)
if err != nil {
return err
}
defer func() {
if err := client.Close(); err != nil {
panic(err)
}
}()
consumer, consumerErrors, highwaterMarks, err := startConsumer([]string{"voltha.events"}, client)
if err != nil {
return err
}
highwater := highwaterMarks["voltha.events"]
signals := make(chan os.Signal, 1)
signal.Notify(signals, os.Interrupt)
// Count how many message processed
consumeCount := 0
// Count how many messages were printed
count := 0
var headerFilter *filter.Filter
if options.Filter != "" {
headerFilterVal, err := filter.Parse(options.Filter)
if err != nil {
return fmt.Errorf("Failed to parse filter: %v", err)
}
headerFilter = &headerFilterVal
}
outputFormat := CharReplacer.Replace(options.Format)
if outputFormat == "" {
outputFormat = GetCommandOptionWithDefault("events-listen", "format", DEFAULT_EVENT_FORMAT)
}
err = options.StartOutput(outputFormat)
if err != nil {
return err
}
var since *time.Time
if options.Since != "" {
since, err = ParseSince(options.Since)
if err != nil {
return err
}
}
// Get signnal for finish
doneCh := make(chan struct{})
go func() {
tStart := time.Now()
Loop:
for {
// Initialize the idle timeout timer
timeoutTimer := time.NewTimer(time.Duration(options.Timeout) * time.Second)
select {
case msg := <-consumer:
consumeCount++
hdr, err := DecodeHeader(msg.Value, msg.Timestamp)
if err != nil {
log.Printf("Error decoding header %v\n", err)
continue
}
match := false
if headerFilter != nil {
var err error
if match, err = headerFilter.Evaluate(*hdr); err != nil {
log.Printf("%v\n", err)
}
} else {
match = true
}
if !match {
// skip printing message
} else if since != nil && hdr.Timestamp.Before(*since) {
// it's too old
} else {
// comma separated between this message and predecessor
if count > 0 {
if options.OutputAs == "json" {
fmt.Println(",")
}
}
// Print it
if options.ShowBody {
if err := PrintMessage(options.OutputAs, msg.Value); err != nil {
log.Printf("%v\n", err)
}
} else {
if err := PrintEventHeader(options.OutputAs, outputFormat, hdr); err != nil {
log.Printf("%v\n", err)
}
}
// Check to see if we've hit the "count" threshold the user specified
count++
if (options.Count > 0) && (count >= options.Count) {
log.Println("Count reached")
doneCh <- struct{}{}
break Loop
}
// Check to see if we've hit the "now" threshold the user specified
if (options.Now) && (!hdr.Timestamp.Before(tStart)) {
log.Println("Now timestamp reached")
doneCh <- struct{}{}
break Loop
}
}
// If we're not in follow mode, see if we hit the highwater mark
if !options.Follow && !options.Now && (msg.Offset >= highwater) {
log.Println("High water reached")
doneCh <- struct{}{}
break Loop
}
// Reset the timeout timer
if !timeoutTimer.Stop() {
<-timeoutTimer.C
}
case consumerError := <-consumerErrors:
log.Printf("Received consumerError topic=%v, partition=%v, err=%v\n", string(consumerError.Topic), string(consumerError.Partition), consumerError.Err)
doneCh <- struct{}{}
case <-signals:
doneCh <- struct{}{}
case <-timeoutTimer.C:
log.Printf("Idle timeout\n")
doneCh <- struct{}{}
}
}
}()
<-doneCh
options.FinishOutput()
log.Printf("Consumed %d messages. Printed %d messages", consumeCount, count)
return nil
}
// Consume message from Sarama and send them out on a channel.
// Supports multiple topics.
// Taken from Sarama example consumer.
func startConsumer(topics []string, client sarama.Client) (chan *sarama.ConsumerMessage, chan *sarama.ConsumerError, map[string]int64, error) {
master, err := sarama.NewConsumerFromClient(client)
if err != nil {
return nil, nil, nil, err
}
consumers := make(chan *sarama.ConsumerMessage)
errors := make(chan *sarama.ConsumerError)
highwater := make(map[string]int64)
for _, topic := range topics {
if strings.Contains(topic, "__consumer_offsets") {
continue
}
partitions, _ := master.Partitions(topic)
// TODO: Add support for multiple partitions
if len(partitions) > 1 {
log.Printf("WARNING: %d partitions on topic %s but we only listen to the first one\n", len(partitions), topic)
}
hw, err := client.GetOffset("voltha.events", partitions[0], sarama.OffsetNewest)
if err != nil {
return nil, nil, nil, fmt.Errorf("Error in consume() getting highwater: Topic %v Partitions: %v", topic, partitions)
}
highwater[topic] = hw
consumer, err := master.ConsumePartition(topic, partitions[0], sarama.OffsetOldest)
if nil != err {
return nil, nil, nil, fmt.Errorf("Error in consume(): Topic %v Partitions: %v", topic, partitions)
}
log.Println(" Start consuming topic ", topic)
go func(topic string, consumer sarama.PartitionConsumer) {
for {
select {
case consumerError := <-consumer.Errors():
errors <- consumerError
case msg := <-consumer.Messages():
consumers <- msg
}
}
}(topic, consumer)
}
return consumers, errors, highwater, nil
}