I have a custom metrics, and I can get data from bash:
aws cloudwatch get-metric-statistics --namespace System/Detail/Linux \
--metric-name LoadAverage1Min --start-time 2017-01-04T00:00:00 \
--end-time 2017-01-04T02:00:00 --period 60 --statistics Average \
--dimensions Name=InstanceId,Value=i-03d55dba88912f054
{
"Datapoints": [
{
"Timestamp": "2017-01-04T00:33:00Z",
"Average": 0.0,
"Unit": "Count"
},
{
"Timestamp": "2017-01-04T01:44:00Z",
"Average": 0.0,
... etc...
But it does not work for lambda. The question is: how to get data for custom metrics?
I'm trying to do the sane using lambda and boto3 (sorry, beginner in Python):
import boto3
import logging
from datetime import datetime
from datetime import timedelta
#setup simple logging for INFO
logger = logging.getLogger()
logger.setLevel(logging.INFO)
#define the connection
ec2 = boto3.resource('ec2')
cw = boto3.client('cloudwatch')
def lambda_handler(event, context):
# Use the filter() method of the instances collection to retrieve
# all running EC2 instances.
filters = [{
'Name': 'instance-state-name',
'Values': ['running']
}
]
#filter the instances
instances = ec2.instances.filter(Filters=filters)
#locate all running instances
RunningInstances = [instance.id for instance in instances]
dnow = datetime.now()
for instance in instances:
inst_name = [tag['Value'] for tag in instance.tags if tag['Key'] == 'Name'][0]
if inst_name != 'instances-name-i-need':
continue
response = cw.get_metric_statistics(
Namespace='System/Detail/Linux',
MetricName='LoadAverage1Min',
Dimensions=[
{
'Name': 'InstanceId',
'Value': 'instance.id'
},
],
StartTime=dnow+timedelta(hours=-15),
EndTime=dnow,
Period=300,
Statistics=['Average']
)
print response
But when I run the function via lambda test I receive empty responses only:
{u'Datapoints': [], 'ResponseMetadata': {'RetryAttempts': 0, 'HTTPStatusCode': 200, 'RequestId': '98ee...6ba', 'HTTPHeaders': {'x-amzn-requestid': '98ee...6ba', 'date': 'Thu, 05 Jan 2017 22:52:12 GMT', 'content-length': '338', 'content-type': 'text/xml'}}, u'Label': 'LoadAverage1Min'}
{u'Datapoints': [], 'ResponseMetadata': {'RetryAttempts': 0, 'HTTPStatusCode': 200, 'RequestId': '98f4...a01', 'HTTPHeaders': {'x-amzn-requestid': '98f4...a01', 'date': 'Thu, 05 Jan 2017 22:52:13 GMT', 'content-length': '338', 'content-type': 'text/xml'}}, u'Label': 'LoadAverage1Min'}
{u'Datapoints': [], 'ResponseMetadata': {'RetryAttempts': 0, 'HTTPStatusCode': 200, 'RequestId': '98f8...764', 'HTTPHeaders': {'x-amzn-requestid': '98f8...764', 'date': 'Thu, 05 Jan 2017 22:52:13 GMT', 'content-length': '338', 'content-type': 'text/xml'}}, u'Label': 'LoadAverage1Min'}
However I was able to get data from AWS namespace with
response = cw.get_metric_statistics(
Namespace='AWS/S3',MetricName='BucketSizeBytes',
StartTime=datetime.utcnow() - timedelta(days=2) ,
EndTime=datetime.utcnow(), Period=86400,
Statistics=['Average'], Unit='Bytes',
Dimensions=[
{'Name': 'BucketName', 'Value': 'bucket-name'},
{u'Name': 'StorageType', u'Value': 'StandardStorage'}
]
)
The data for the metrics does exist:
so, how can I get it?
