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@ewdurbin
Last active September 18, 2018 20:59
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Little bit of magic to send your DataDog dogstatsd metrics to CloudWatch

DataDog + CloudWatch Custom Metrics

A little bit of python to take your custom dogstatsd metrics and ship them to CloudWatch :)

Just add the plugin code, configure it as a custom_emitter in DataDog's config then tag your metrics with cloudwatch:emit.

Edit: Also realized you need to add boto3 to dd-agent's venv:

  • sudo /opt/datadog-agent/embedded/bin/pip install boto3

Now your application-level metric can be used to trigger things like AutoScalingRules!

import datetime
import os
import boto3
REGION = os.environ.get('REGION', 'us-east-1')
cloudwatch = boto3.client('cloudwatch', region_name=REGION)
def parse_tags(tag_string):
tags = {}
for tag in filter(None, tag_string.split(', ')):
k, v = tag.replace('"', '').strip().partition(":")[::2]
if v == '':
tags['data_dog_tags'] = tags.get('data_dog_tags', []) + [k]
else:
tags[k] = v
return tags
def send_series_to_cloudwatch(namespace, series, tags):
metric_data = []
for point in series['points']:
data = {
'MetricName': series['metric'],
'Dimensions': [
{
'Name': 'AutoScalingGroupName',
'Value': tags['autoscaling_group']
},
],
'Timestamp': datetime.datetime.utcfromtimestamp(int(point[0])),
'Value': float(point[1])
}
metric_data.append(data)
data = {
'MetricName': series['metric'],
'Dimensions': [
{
'Name': 'InstanceId',
'Value': tags['instance_id']
},
{
'Name': 'AutoScalingGroupName',
'Value': tags['autoscaling_group']
},
],
'Timestamp': datetime.datetime.utcfromtimestamp(int(point[0])),
'Value': float(point[1])
}
metric_data.append(data)
cloudwatch.put_metric_data(
Namespace=namespace,
MetricData=metric_data
)
class CloudWatchEmitter(object):
def __call__(self, payload, logger, config):
agent_tags = parse_tags(config.get('tags', ''))
for series in payload.get('series', []):
series_tags = series.get('tags')
if series_tags is None:
series_tags = []
if 'cloudwatch:emit' in series_tags:
send_series_to_cloudwatch(agent_tags.get('app_name',
'datadog'),
series, agent_tags)
# Write this to /usr/share/datadog/cloudwatch_emitter.py Add a line like:
custom_emitters: /usr/share/datadog/cloudwatch_emitter.py:CloudWatchEmitter'
Simplified BSD License
Copyright (c) 2016-2017, Ernest W. Durbin III
Copyright (c) 2016-2017, The Groundwork LLC.
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