fluent-plugin-cloudwatch, a plugin for Fluentd

Overview

AWS CloudWatch input plugin.

This plugin is simple. Get metrics from cloudwatch to fluentd.

Get metrics from AWS CloudWatch API.
- Interval is 300(default. config=interval) seconds
- Fetch datapoints in recent (interval * 10) seconds, and emit the latest datapoint to Fluentd data stream.

Configuration

<source>
  @type cloudwatch
  tag cloudwatch
  aws_key_id  YOUR_AWS_KEY_ID
  aws_sec_key YOUR_AWS_SECRET_KEY
  cw_endpoint ENDPOINT

  namespace        [namespace]
  statistics       [statistics] (default: Average)
  metric_name      [metric name]
  dimensions_name  [dimensions_name]
  dimensions_value [dimensions value]
  period           [period] (default: 300)
  interval         [interval] (default: 300)
  delayed_start    [bool] (default: false)
  emit_zero        [bool] (default: false)
</source>

GET RDS Metric

<source>
  @type cloudwatch
  tag  cloudwatch
  aws_key_id  YOUR_AWS_KEY_ID
  aws_sec_key YOUR_AWS_SECRET_KEY
  cw_endpoint monitoring.ap-northeast-1.amazonaws.com

  namespace AWS/RDS
  metric_name CPUUtilization,FreeStorageSpace,DiskQueueDepth,FreeableMemory,SwapUsage,ReadIOPS,ReadLatency,ReadThroughput,WriteIOPS,WriteLatency,WriteThroughput
  dimensions_name DBInstanceIdentifier
  dimensions_value rds01
</source>

<match cloudwatch>
  @type copy
 <store>
  @type file
  path /var/log/td-agent/test
 </store>
</match>

output data format

2013-02-24T13:40:00+09:00       cloudwatch      {"CPUUtilization":2.0}
2013-02-24T13:40:00+09:00       cloudwatch      {"FreeStorageSpace":104080723968.0}
2013-02-24T13:39:00+09:00       cloudwatch      {"DiskQueueDepth":0.002000233360558732}
2013-02-24T13:40:00+09:00       cloudwatch      {"FreeableMemory":6047948800.0}
2013-02-24T13:40:00+09:00       cloudwatch      {"SwapUsage":0.0}
2013-02-24T13:40:00+09:00       cloudwatch      {"ReadIOPS":0.4832769510223807}
2013-02-24T13:40:00+09:00       cloudwatch      {"ReadLatency":0.0}
2013-02-24T13:39:00+09:00       cloudwatch      {"ReadThroughput":0.0}
2013-02-24T13:40:00+09:00       cloudwatch      {"WriteIOPS":5.116069791857616}
2013-02-24T13:40:00+09:00       cloudwatch      {"WriteLatency":0.004106280193236715}
2013-02-24T13:39:00+09:00       cloudwatch      {"WriteThroughput":54074.40992132284}

GET ELB Metirc

<source>
  @type cloudwatch
  tag  cloudwatch
  aws_key_id  YOUR_AWS_KEY_ID
  aws_sec_key YOUR_AWS_SECRET_KEY
  cw_endpoint monitoring.ap-northeast-1.amazonaws.com

  namespace AWS/ELB
  metric_name HealthyHostCount,HTTPCode_Backend_2XX,HTTPCode_Backend_3XX,HTTPCode_Backend_4XX,HTTPCode_Backend_5XX,HTTPCode_ELB_4XX,Latency,RequestCount,UnHealthyHostCount
  dimensions_name LoadBalancerName
  dimensions_value YOUR_ELB_NAME
</source>

output data format

2013-03-21T14:08:00+09:00       cloudwatch      {"HealthyHostCount":2.0}
2013-03-21T14:08:00+09:00       cloudwatch      {"HTTPCode_Backend_2XX":1.0}
2013-03-21T14:08:00+09:00       cloudwatch      {"Latency":0.004025}
2013-03-21T14:08:00+09:00       cloudwatch      {"RequestCount":1.0}
2013-03-21T14:09:00+09:00       cloudwatch      {"UnHealthyHostCount":0.0}

GET EC2 Metirc

<source>
  @type cloudwatch
  tag  cloudwatch
  aws_key_id  YOUR_AWS_KEY_ID
  aws_sec_key YOUR_AWS_SECRET_KEY
  cw_endpoint monitoring.ap-northeast-1.amazonaws.com

  namespace AWS/EC2
  metric_name CPUUtilization,FreeStorageSpace,DiskQueueDepth,FreeableMemory,SwapUsage,ReadIOPS,ReadLatency,ReadThroughput,WriteIOPS,WriteLatency,WriteThroughput
  dimensions_name InstanceId
  dimensions_value YOUR_INSTANCE_ID
</source>

output data format

2013-02-25T00:44:00+09:00       cloudwatch      {"CPUUtilization":1.58}
2013-02-25T00:44:00+09:00       cloudwatch      {"DiskReadBytes":0.0}
2013-02-25T00:44:00+09:00       cloudwatch      {"DiskReadBytes":0.0}
2013-02-25T00:44:00+09:00       cloudwatch      {"DiskWriteBytes":0.0}
2013-02-25T00:44:00+09:00       cloudwatch      {"DiskWriteOps":0.0}
2013-02-25T00:44:00+09:00       cloudwatch      {"NetworkIn":95183.0}
2013-02-25T00:44:00+09:00       cloudwatch      {"NetworkOut":95645.0}

GET DynamoDB Metirc

  @type cloudwatch
  tag  cloudwatch
  aws_key_id  YOUR_AWS_KEY_ID
  aws_sec_key YOUR_AWS_SECRET_KEY
  cw_endpoint monitoring.ap-northeast-1.amazonaws.com

  namespace AWS/DynamoDB
  metric_name ConsumedReadCapacityUnits,ConsumedWriteCapacityUnits
  dimensions_name TableName
  dimensions_value some_dd_tablename
  statistics Sum 
  interval 300
  period 300

output data format

2013-04-11 15:13:00 +0900       cloudwatch      {"ConsumedReadCapacityUnits":8271.5}
2013-04-11 15:13:00 +0900       cloudwatch      {"ConsumedWriteCapacityUnits":2765.5}

GET Billing Metirc

Note: Billing requires the us-east-1 endpoint

  @type cloudwatch
  tag  cloudwatch
  aws_key_id  YOUR_AWS_KEY_ID
  aws_sec_key YOUR_AWS_SECRET_KEY
  cw_endpoint monitoring.us-east-1.amazonaws.com

  namespace AWS/Billing
  metric_name EstimatedCharges
  dimensions_name Currency
  dimensions_value USD
  statistics Average
  interval 7200
  period 21600

output data format

2013-06-10 02:03:00 +0900       cloudwatch      {"EstimatedCharges_in_USD":"543.175"}
2013-06-10 04:03:00 +0900       cloudwatch      {"EstimatedCharges_in_USD":"550.39"}

GET StorageGateway Metirc

  @type cloudwatch
  tag  cloudwatch
  aws_key_id  YOUR_AWS_KEY_ID
  aws_sec_key YOUR_AWS_SECRET_KEY
  cw_endpoint monitoring.us-east-1.amazonaws.com

  namespace AWS/StorageGateway
  metric_name CacheHitPercent,CachePercentUsed
  dimensions_name GatewayId,GatewayName
  dimensions_value sgw-XXXXXXXX,mygateway
  statistics Average

output data format

2014-01-20 20:12:00 +0900 cloudwatch: {"CacheHitPercent":0.0}
2014-01-20 20:12:00 +0900 cloudwatch: {"CachePercentUsed":95.15519175634687}

config: Complex metric_name

metric_name format is allowed as below.

MetricName
MetricName:Statstics

For example, this configuration fetches "Sum of RequestCount" and "Average of Latancy".

  metric_name RequestCount,Latency:Average
  statistics Sum

config: delayed_start

When config delayed_start is set true, plugin startup will be delayed in random seconds(0 ~ interval).

config: offset

unit: seconds.

flunet-plugin-cloudwatch gets metrics between now and period × 10 sec ago, and pick a latest value from that.

But the latest metric is insufficient for statistics Sum.

If offset is specified, fluent-plugin-cloudwatch gets metrics between offset sec ago and older.

config: emit_zero

If emit_zero is true and cloudwatch datapoint is empty, fluent-plugin-cloudwatch emits 0 instead of warn log "datapoint is empty".

Contributing

Fork it
Create your feature branch (git checkout -b my-new-feature)
Commit your changes (git commit -am 'Added some feature')
Push to the branch (git push origin my-new-feature)
Create new Pull Request