python connect_cloudwatch不同的区域

Question

I am trying to connect and dynamically get ALL metrics for ALL services available in AWS CloudWatch in a particular AWS Region:

try:
    print "Connecting to region %s" % (args.region)
    conn = boto.connect_cloudwatch()
    #conn = boto.ec2.cloudwatch.connect_to_region(args.region)
    print "Retrieving all CloudWatch metrics"
    metrics = conn.list_metrics()
    print "Collected %d metrics" % (len(metrics))
except boto.exception.BotoServerError, error:
    print "Failed to connect to AWS\n  ->%s" % (error)
    sys.exit(1)

Unfortunately boto.ec2.cloudwatch.connect_to_region(args.region) give me only EC2 metrics from a region, and I couldn't figure out from the documentation how to specify a region to conn = boto.connect_cloudwatch() . Please help!

Answer 1

You can choose the Cloudwatch region in the .boto config file. For example:

[Credentials]
aws_access_key_id = <your aws access key>
aws_secret_access_key = <your aws secret access key>

[Boto]
cloudwatch_region_name = us-west-2
cloudwatch_region_endpoint = monitoring.us-west-2.amazonaws.com

The above will connect you to us-west-2 when you run:

import boto

conn = boto.connect_cloudwatch()

Hope it helps.

Answer 2

The code you show above looks fine. The list_metrics method will return all of the metrics which actually have data associated with them in the current account. If you are only seeing EC2 metrics then that means that your account only has EC2 data collected in CloudWatch for that region.

Answer 3

boto.connect_cloudwatch() will do exactly the same as boto.ec2.cloudwatch.connect_region('eu-west-1') but without asking for the region. The region is used from the configuration in ~/.boto . The common way to specify the region is to use connect_region('myregion') or just set it in the configuration if you do not work across multiple regions.

So if you don't find your metrics in the connection object created by boto.ec2.cloudwatch.connect_region('eu-west-1') you won't find it in the other one. Both cases creates a boto.ec2.cloudwatch.CloudWatchConnection object. ( Boto documentation )

As far as I understand the documentation boto currently does not support other metrics than EC2-metrics.