264 lines
6.9 KiB
Go
264 lines
6.9 KiB
Go
package kinesis
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import (
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"log"
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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/service/kinesis"
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"github.com/gofrs/uuid"
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"github.com/influxdata/telegraf"
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internalaws "github.com/influxdata/telegraf/config/aws"
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"github.com/influxdata/telegraf/plugins/outputs"
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"github.com/influxdata/telegraf/plugins/serializers"
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)
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type (
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KinesisOutput struct {
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Region string `toml:"region"`
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AccessKey string `toml:"access_key"`
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SecretKey string `toml:"secret_key"`
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RoleARN string `toml:"role_arn"`
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Profile string `toml:"profile"`
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Filename string `toml:"shared_credential_file"`
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Token string `toml:"token"`
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EndpointURL string `toml:"endpoint_url"`
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StreamName string `toml:"streamname"`
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PartitionKey string `toml:"partitionkey"`
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RandomPartitionKey bool `toml:"use_random_partitionkey"`
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Partition *Partition `toml:"partition"`
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Debug bool `toml:"debug"`
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svc *kinesis.Kinesis
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serializer serializers.Serializer
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}
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Partition struct {
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Method string `toml:"method"`
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Key string `toml:"key"`
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Default string `toml:"default"`
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}
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)
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var sampleConfig = `
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## Amazon REGION of kinesis endpoint.
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region = "ap-southeast-2"
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## Amazon Credentials
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## Credentials are loaded in the following order
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## 1) Assumed credentials via STS if role_arn is specified
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## 2) explicit credentials from 'access_key' and 'secret_key'
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## 3) shared profile from 'profile'
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## 4) environment variables
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## 5) shared credentials file
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## 6) EC2 Instance Profile
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#access_key = ""
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#secret_key = ""
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#token = ""
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#role_arn = ""
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#profile = ""
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#shared_credential_file = ""
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## Endpoint to make request against, the correct endpoint is automatically
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## determined and this option should only be set if you wish to override the
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## default.
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## ex: endpoint_url = "http://localhost:8000"
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# endpoint_url = ""
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## Kinesis StreamName must exist prior to starting telegraf.
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streamname = "StreamName"
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## DEPRECATED: PartitionKey as used for sharding data.
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partitionkey = "PartitionKey"
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## DEPRECATED: If set the partitionKey will be a random UUID on every put.
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## This allows for scaling across multiple shards in a stream.
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## This will cause issues with ordering.
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use_random_partitionkey = false
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## The partition key can be calculated using one of several methods:
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##
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## Use a static value for all writes:
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# [outputs.kinesis.partition]
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# method = "static"
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# key = "howdy"
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#
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## Use a random partition key on each write:
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# [outputs.kinesis.partition]
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# method = "random"
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#
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## Use the measurement name as the partition key:
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# [outputs.kinesis.partition]
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# method = "measurement"
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#
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## Use the value of a tag for all writes, if the tag is not set the empty
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## default option will be used. When no default, defaults to "telegraf"
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# [outputs.kinesis.partition]
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# method = "tag"
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# key = "host"
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# default = "mykey"
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## Data format to output.
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## Each data format has its own unique set of configuration options, read
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## more about them here:
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## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_OUTPUT.md
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data_format = "influx"
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## debug will show upstream aws messages.
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debug = false
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`
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func (k *KinesisOutput) SampleConfig() string {
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return sampleConfig
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}
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func (k *KinesisOutput) Description() string {
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return "Configuration for the AWS Kinesis output."
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}
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func (k *KinesisOutput) Connect() error {
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if k.Partition == nil {
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log.Print("E! kinesis : Deprecated paritionkey configuration in use, please consider using outputs.kinesis.partition")
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}
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// We attempt first to create a session to Kinesis using an IAMS role, if that fails it will fall through to using
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// environment variables, and then Shared Credentials.
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if k.Debug {
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log.Printf("I! kinesis: Establishing a connection to Kinesis in %s", k.Region)
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}
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credentialConfig := &internalaws.CredentialConfig{
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Region: k.Region,
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AccessKey: k.AccessKey,
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SecretKey: k.SecretKey,
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RoleARN: k.RoleARN,
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Profile: k.Profile,
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Filename: k.Filename,
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Token: k.Token,
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EndpointURL: k.EndpointURL,
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}
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configProvider := credentialConfig.Credentials()
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svc := kinesis.New(configProvider)
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_, err := svc.DescribeStreamSummary(&kinesis.DescribeStreamSummaryInput{
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StreamName: aws.String(k.StreamName),
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})
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k.svc = svc
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return err
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}
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func (k *KinesisOutput) Close() error {
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return nil
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}
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func (k *KinesisOutput) SetSerializer(serializer serializers.Serializer) {
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k.serializer = serializer
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}
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func writekinesis(k *KinesisOutput, r []*kinesis.PutRecordsRequestEntry) time.Duration {
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start := time.Now()
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payload := &kinesis.PutRecordsInput{
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Records: r,
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StreamName: aws.String(k.StreamName),
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}
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if k.Debug {
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resp, err := k.svc.PutRecords(payload)
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if err != nil {
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log.Printf("E! kinesis: Unable to write to Kinesis : %s", err.Error())
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}
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log.Printf("I! Wrote: '%+v'", resp)
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} else {
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_, err := k.svc.PutRecords(payload)
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if err != nil {
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log.Printf("E! kinesis: Unable to write to Kinesis : %s", err.Error())
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}
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}
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return time.Since(start)
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}
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func (k *KinesisOutput) getPartitionKey(metric telegraf.Metric) string {
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if k.Partition != nil {
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switch k.Partition.Method {
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case "static":
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return k.Partition.Key
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case "random":
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u, err := uuid.NewV4()
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if err != nil {
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return k.Partition.Default
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}
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return u.String()
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case "measurement":
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return metric.Name()
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case "tag":
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if t, ok := metric.GetTag(k.Partition.Key); ok {
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return t
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} else if len(k.Partition.Default) > 0 {
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return k.Partition.Default
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}
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// Default partition name if default is not set
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return "telegraf"
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default:
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log.Printf("E! kinesis : You have configured a Partition method of '%s' which is not supported", k.Partition.Method)
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}
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}
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if k.RandomPartitionKey {
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u, err := uuid.NewV4()
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if err != nil {
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return k.Partition.Default
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}
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return u.String()
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}
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return k.PartitionKey
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}
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func (k *KinesisOutput) Write(metrics []telegraf.Metric) error {
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var sz uint32
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if len(metrics) == 0 {
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return nil
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}
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r := []*kinesis.PutRecordsRequestEntry{}
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for _, metric := range metrics {
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sz++
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values, err := k.serializer.Serialize(metric)
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if err != nil {
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log.Printf("D! [outputs.kinesis] Could not serialize metric: %v", err)
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continue
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}
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partitionKey := k.getPartitionKey(metric)
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d := kinesis.PutRecordsRequestEntry{
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Data: values,
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PartitionKey: aws.String(partitionKey),
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}
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r = append(r, &d)
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if sz == 500 {
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// Max Messages Per PutRecordRequest is 500
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elapsed := writekinesis(k, r)
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log.Printf("D! Wrote a %d point batch to Kinesis in %+v.", sz, elapsed)
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sz = 0
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r = nil
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}
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}
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if sz > 0 {
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elapsed := writekinesis(k, r)
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log.Printf("D! Wrote a %d point batch to Kinesis in %+v.", sz, elapsed)
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}
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return nil
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}
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func init() {
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outputs.Add("kinesis", func() telegraf.Output {
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return &KinesisOutput{}
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})
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}
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