47daa9d5f0
All source should be prepared in a manner that reflects comments that VMware would be comfortable sharing with the public. Documentation only. No functional change. Update the license to MIT to be consistent with approved OSSTP product tracking ticket: https://osstp.vmware.com/oss/#/upstreamcontrib/project/1101391 Jira CNA-1117 Change-Id: I3fe31f10db954887481e3b21ccd20ec8e39c5996
348 lines
10 KiB
Go
348 lines
10 KiB
Go
/*
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* Copyright (c) 2018 VMware, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
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* associated documentation files (the "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is furnished to do
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* so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or substantial
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* portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
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* NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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// The implementation is derived from https://github.com/patrobinson/gokini
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//
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// Copyright 2018 Patrick robinson
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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package metrics
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import (
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"sync"
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"time"
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"github.com/aws/aws-sdk-go/aws"
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"github.com/aws/aws-sdk-go/aws/session"
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"github.com/aws/aws-sdk-go/service/cloudwatch"
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"github.com/aws/aws-sdk-go/service/cloudwatch/cloudwatchiface"
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log "github.com/sirupsen/logrus"
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)
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type CloudWatchMonitoringService struct {
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Namespace string
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KinesisStream string
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WorkerID string
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Region string
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// control how often to pusblish to CloudWatch
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MetricsBufferTimeMillis int
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MetricsMaxQueueSize int
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stop *chan struct{}
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waitGroup *sync.WaitGroup
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svc cloudwatchiface.CloudWatchAPI
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shardMetrics *sync.Map
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}
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type cloudWatchMetrics struct {
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processedRecords int64
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processedBytes int64
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behindLatestMillis []float64
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leasesHeld int64
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leaseRenewals int64
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getRecordsTime []float64
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processRecordsTime []float64
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sync.Mutex
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}
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func (cw *CloudWatchMonitoringService) Init() error {
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s := session.New(&aws.Config{Region: aws.String(cw.Region)})
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cw.svc = cloudwatch.New(s)
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cw.shardMetrics = new(sync.Map)
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stopChan := make(chan struct{})
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cw.stop = &stopChan
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wg := sync.WaitGroup{}
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cw.waitGroup = &wg
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return nil
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}
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func (cw *CloudWatchMonitoringService) Start() error {
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cw.waitGroup.Add(1)
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// entering eventloop for sending metrics to CloudWatch
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go cw.eventloop()
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return nil
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}
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func (cw *CloudWatchMonitoringService) Shutdown() {
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log.Info("Shutting down cloudwatch metrics system...")
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close(*cw.stop)
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cw.waitGroup.Wait()
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log.Info("Cloudwatch metrics system has been shutdown.")
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}
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// Start daemon to flush metrics periodically
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func (cw *CloudWatchMonitoringService) eventloop() {
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defer cw.waitGroup.Done()
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for {
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err := cw.flush()
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if err != nil {
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log.Errorf("Error sending metrics to CloudWatch. %+v", err)
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}
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select {
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case <-*cw.stop:
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log.Info("Shutting down monitoring system")
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cw.flush()
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return
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case <-time.After(time.Duration(cw.MetricsBufferTimeMillis) * time.Millisecond):
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}
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}
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}
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func (cw *CloudWatchMonitoringService) flushShard(shard string, metric *cloudWatchMetrics) bool {
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metric.Lock()
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defaultDimensions := []*cloudwatch.Dimension{
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{
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Name: aws.String("Shard"),
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Value: &shard,
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},
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{
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Name: aws.String("KinesisStreamName"),
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Value: &cw.KinesisStream,
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},
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}
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leaseDimensions := []*cloudwatch.Dimension{
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{
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Name: aws.String("Shard"),
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Value: &shard,
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},
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{
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Name: aws.String("KinesisStreamName"),
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Value: &cw.KinesisStream,
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},
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{
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Name: aws.String("WorkerID"),
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Value: &cw.WorkerID,
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},
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}
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metricTimestamp := time.Now()
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data := []*cloudwatch.MetricDatum{
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{
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Dimensions: defaultDimensions,
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MetricName: aws.String("RecordsProcessed"),
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Unit: aws.String("Count"),
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Timestamp: &metricTimestamp,
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Value: aws.Float64(float64(metric.processedRecords)),
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},
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{
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Dimensions: defaultDimensions,
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MetricName: aws.String("DataBytesProcessed"),
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Unit: aws.String("Bytes"),
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Timestamp: &metricTimestamp,
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Value: aws.Float64(float64(metric.processedBytes)),
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},
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{
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Dimensions: leaseDimensions,
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MetricName: aws.String("RenewLease.Success"),
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Unit: aws.String("Count"),
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Timestamp: &metricTimestamp,
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Value: aws.Float64(float64(metric.leaseRenewals)),
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},
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{
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Dimensions: leaseDimensions,
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MetricName: aws.String("CurrentLeases"),
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Unit: aws.String("Count"),
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Timestamp: &metricTimestamp,
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Value: aws.Float64(float64(metric.leasesHeld)),
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},
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}
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if len(metric.behindLatestMillis) > 0 {
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data = append(data, &cloudwatch.MetricDatum{
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Dimensions: defaultDimensions,
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MetricName: aws.String("MillisBehindLatest"),
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Unit: aws.String("Milliseconds"),
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Timestamp: &metricTimestamp,
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StatisticValues: &cloudwatch.StatisticSet{
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SampleCount: aws.Float64(float64(len(metric.behindLatestMillis))),
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Sum: sumFloat64(metric.behindLatestMillis),
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Maximum: maxFloat64(metric.behindLatestMillis),
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Minimum: minFloat64(metric.behindLatestMillis),
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}})
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}
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if len(metric.getRecordsTime) > 0 {
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data = append(data, &cloudwatch.MetricDatum{
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Dimensions: defaultDimensions,
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MetricName: aws.String("KinesisDataFetcher.getRecords.Time"),
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Unit: aws.String("Milliseconds"),
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Timestamp: &metricTimestamp,
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StatisticValues: &cloudwatch.StatisticSet{
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SampleCount: aws.Float64(float64(len(metric.getRecordsTime))),
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Sum: sumFloat64(metric.getRecordsTime),
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Maximum: maxFloat64(metric.getRecordsTime),
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Minimum: minFloat64(metric.getRecordsTime),
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}})
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}
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if len(metric.processRecordsTime) > 0 {
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data = append(data, &cloudwatch.MetricDatum{
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Dimensions: defaultDimensions,
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MetricName: aws.String("RecordProcessor.processRecords.Time"),
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Unit: aws.String("Milliseconds"),
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Timestamp: &metricTimestamp,
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StatisticValues: &cloudwatch.StatisticSet{
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SampleCount: aws.Float64(float64(len(metric.processRecordsTime))),
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Sum: sumFloat64(metric.processRecordsTime),
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Maximum: maxFloat64(metric.processRecordsTime),
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Minimum: minFloat64(metric.processRecordsTime),
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}})
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}
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// Publish metrics data to cloud watch
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_, err := cw.svc.PutMetricData(&cloudwatch.PutMetricDataInput{
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Namespace: aws.String(cw.Namespace),
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MetricData: data,
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})
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if err == nil {
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metric.processedRecords = 0
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metric.processedBytes = 0
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metric.behindLatestMillis = []float64{}
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metric.leaseRenewals = 0
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metric.getRecordsTime = []float64{}
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metric.processRecordsTime = []float64{}
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} else {
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log.Errorf("Error in publishing cloudwatch metrics. Error: %+v", err)
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}
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metric.Unlock()
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return true
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}
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func (cw *CloudWatchMonitoringService) flush() error {
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log.Debugf("Flushing metrics data. Stream: %s, Worker: %s", cw.KinesisStream, cw.WorkerID)
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// publish per shard metrics
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cw.shardMetrics.Range(func(k, v interface{}) bool {
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shard, metric := k.(string), v.(*cloudWatchMetrics)
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return cw.flushShard(shard, metric)
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})
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return nil
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}
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func (cw *CloudWatchMonitoringService) IncrRecordsProcessed(shard string, count int) {
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m := cw.getOrCreatePerShardMetrics(shard)
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m.Lock()
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defer m.Unlock()
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m.processedRecords += int64(count)
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}
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func (cw *CloudWatchMonitoringService) IncrBytesProcessed(shard string, count int64) {
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m := cw.getOrCreatePerShardMetrics(shard)
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m.Lock()
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defer m.Unlock()
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m.processedBytes += count
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}
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func (cw *CloudWatchMonitoringService) MillisBehindLatest(shard string, millSeconds float64) {
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m := cw.getOrCreatePerShardMetrics(shard)
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m.Lock()
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defer m.Unlock()
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m.behindLatestMillis = append(m.behindLatestMillis, millSeconds)
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}
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func (cw *CloudWatchMonitoringService) LeaseGained(shard string) {
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m := cw.getOrCreatePerShardMetrics(shard)
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m.Lock()
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defer m.Unlock()
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m.leasesHeld++
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}
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func (cw *CloudWatchMonitoringService) LeaseLost(shard string) {
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m := cw.getOrCreatePerShardMetrics(shard)
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m.Lock()
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defer m.Unlock()
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m.leasesHeld--
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}
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func (cw *CloudWatchMonitoringService) LeaseRenewed(shard string) {
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m := cw.getOrCreatePerShardMetrics(shard)
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m.Lock()
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defer m.Unlock()
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m.leaseRenewals++
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}
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func (cw *CloudWatchMonitoringService) RecordGetRecordsTime(shard string, time float64) {
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m := cw.getOrCreatePerShardMetrics(shard)
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m.Lock()
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defer m.Unlock()
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m.getRecordsTime = append(m.getRecordsTime, time)
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}
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func (cw *CloudWatchMonitoringService) RecordProcessRecordsTime(shard string, time float64) {
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m := cw.getOrCreatePerShardMetrics(shard)
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m.Lock()
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defer m.Unlock()
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m.processRecordsTime = append(m.processRecordsTime, time)
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}
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func (cw *CloudWatchMonitoringService) getOrCreatePerShardMetrics(shard string) *cloudWatchMetrics {
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var i interface{}
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var ok bool
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if i, ok = cw.shardMetrics.Load(shard); !ok {
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m := &cloudWatchMetrics{}
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cw.shardMetrics.Store(shard, m)
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return m
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}
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return i.(*cloudWatchMetrics)
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}
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func sumFloat64(slice []float64) *float64 {
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sum := float64(0)
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for _, num := range slice {
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sum += num
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}
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return &sum
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}
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func maxFloat64(slice []float64) *float64 {
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if len(slice) < 1 {
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return aws.Float64(0)
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}
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max := slice[0]
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for _, num := range slice {
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if num > max {
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max = num
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}
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}
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return &max
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}
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func minFloat64(slice []float64) *float64 {
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if len(slice) < 1 {
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return aws.Float64(0)
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}
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min := slice[0]
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for _, num := range slice {
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if num < min {
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min = num
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}
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}
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return &min
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}
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