# Prometheus.exporter.cloudwatch returning empty data **URL:** \ **Category:** Grafana Alloy\ **Tags:** promethues, cloudwatch\ **Created:** [March 31, 2025, 12:45pm UTC](https://community.grafana.com/t/prometheus-exporter-cloudwatch-returning-empty-data/147502 "2025-03-31T12:45:05Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![arnaubria](https://sea2.discourse-cdn.com/grafana/user_avatar/community.grafana.com/arnaubria/32/52885_2.png) [@arnaubria](https://community.grafana.com/u/arnaubria)\ **Post date:** [March 31, 2025, 12:45pm UTC](https://community.grafana.com/t/prometheus-exporter-cloudwatch-returning-empty-data/147502/1 "2025-03-31T12:45:05Z")
Dear all, I’d like to configure a static job for the [prometheus.export.cloudwatch](https://grafana.com/docs/alloy/latest/reference/components/prometheus/prometheus.exporter.cloudwatch/#static) to get S3 data. I’ve followed the documentation everything seems fine to me: 1.- alloy user has valid credentials 2.- prometheus conf for the static job looks ok My env: allow 1.2.0 on Centos9. I added to my alloy.conf something like: ```auto prometheus.exporter.cloudwatch "s3_data" { debug = true sts_region = "eu-west-1" static "compbiodata" { namespace = "AWS/S3" regions = ["eu-west-1"] dimensions = { "BucketName" = "bucket_name", "StorageType" = "StandardStorage", } metric { name = "BucketSizeBytes" statistics = ["Average"] period = "86400s" } } } ``` _bucket\_name_ is one existing bucketname from my account but, ideally, I’d like to get ALL buckets, so I also tried with ```auto dimensions = { BucketName="*" , StorageType="*", } ``` alloy starts succesfully bu no data is pushed to prometheus, in the logs I see something like: ```auto ----------------------------------------------------- 2025/03/31 14:36:35 arn:aws:iam::awsaccountid:user/custom.cloudwatch.integration AIDARXYZ awsaccountid 4ec4c575-431a-80cb-a2c3ddb3da09 2025/03/31 14:36:35 DEBUG: Request monitoring/GetMetricStatistics Details: ---[REQUEST POST-SIGN]----------------------------- POST / HTTP/1.1 Host: monitoring.eu-west-1.amazonaws.com User-Agent: aws-sdk-go/1.53.11 (go1.22.3; linux; amd64) Content-Length: 385 Authorization: AWS4-HMAC-SHA256 Credential=AKIARXYZ/20250331/eu-west-1/monitoring/aws4_request, SignedHeaders=content-length;content-type;host;x-amz-date, Signature=XYZ Content-Type: application/x-www-form-urlencoded; charset=utf-8 X-Amz-Date: 20250331T123635Z Accept-Encoding: gzip Action=GetMetricStatistics&Dimensions.member.1.Name=BucketName&Dimensions.member.1.Value=awsaccountid-terraform-state-bucket&Dimensions.member.2.Name=StorageType&Dimensions.member.2.Value=StandardStorage&EndTime=2025-03-31T12%3A36%3A35.302Z&MetricName=BucketSizeBytes&Namespace=AWS%2FS3&Period=86400&StartTime=2025-03-30T12%3A36%3A35.302Z&Statistics.member.1=Average&Version=2010-08-01 ----------------------------------------------------- 2025/03/31 14:36:35 DEBUG: Response monitoring/GetMetricStatistics Details: ---[RESPONSE]-------------------------------------- HTTP/1.1 200 OK Content-Length: 338 Content-Type: text/xml Date: Mon, 31 Mar 2025 12:36:35 GMT X-Amzn-Requestid: 73e90656-280b-4ad2-8e7c-77215c32b0aa ----------------------------------------------------- 2025/03/31 14:36:35 73e90656-280b-4ad2-8e7c-77215c32b0aa ``` I’m playing from the very same box with python SDK and I get data when I run something like: ```auto response = cloudwatch.get_metric_statistics( Namespace="AWS/S3", MetricName="BucketSizeBytes", Dimensions=[ { "Name": "BucketName", "Value": bucket_name }, { "Name": "StorageType", "Value": type } ], StartTime=datetime.datetime.now() - datetime.timedelta(days=2), EndTime=datetime.datetime.now(), Period=86400, Statistics=['Average'] ) ``` not sure if I’m overswwing something obvious in the conf or missing anything… but the debug flag is not providing enough infomration for me to understand where the problem is. ah, one more thing,I added a scrape section for this, but I guess this is yet unrelevant to my get metrics issue. ```auto prometheus.scrape "s3_data" { scrape_interval = "3m" targets = prometheus.exporter.cloudwatch.s3_data.targets forward_to = [prometheus.remote_write.prom.receiver] } ``` any help is appreciated. Best, ---
**Author:** ![arnaubria](https://sea2.discourse-cdn.com/grafana/user_avatar/community.grafana.com/arnaubria/32/52885_2.png) [@arnaubria](https://community.grafana.com/u/arnaubria)\ **Post date:** [April 1, 2025, 2:13pm UTC](https://community.grafana.com/t/prometheus-exporter-cloudwatch-returning-empty-data/147502/2 "2025-04-01T14:13:19Z")
So, couple of conceptual mistakes here: 1.- Teher were no datapoints becuase of the period/lenght combination, it was too short. You can play around with AWS command until you find a good balance: ```auto aws cloudwatch get-metric-statistics --metric-name BucketSizeBytes --dimensions Name=BucketName,Value=MYBUCKETNAME Name=StorageType,Value=StandardStorage --namespace AWS/S3 --statistics Average --period 3600 --start-time 2025-03-27T11:55:50+01:00 --end-time 2025-04-01T12:55:50+02:00 ``` 2.- In static mode, using wildcards in dimensions does not work. Then you need a discovery block.: ```auto prometheus.exporter.cloudwatch "s3_data" { debug = true sts_region = "eu-west-1" discovery { type = "AWS/S3" regions = ["eu-west-1"] metric { name = "BucketSizeBytes" statistics = ["Average"] period = "3600s" } } } prometheus.scrape "s3_data" { scrape_interval = "3m" targets = prometheus.exporter.cloudwatch.s3_data.targets forward_to = [prometheus.remote_write.prom.receiver] } ``` Now logs show some S3 information for the current account, so far cross acount not workin, btu this another story. So I answer my own question, hoping that this will be helpful for someone in the future.