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# Monitoring AWS Resources
> [Introduced](https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/12621) in GitLab 9.4
GitLab has support for automatically detecting and monitoring AWS resources, starting with the [Elastic Load Balancer](https://aws.amazon.com/elasticloadbalancing/). This is provided by leveraging the official [Cloudwatch exporter](https://github.com/prometheus/cloudwatch_exporter), which translates [Cloudwatch metrics](https://aws.amazon.com/cloudwatch/) into a Prometheus readable form.
## Requirements
The [Prometheus service](../prometheus.md) must be enabled.
## Metrics supported
| Name | Query |
| ---- | ----- |
| Throughput (req/sec) | sum(aws_elb_request_count_sum{%{environment_filter}}) / 60 |
| Latency (ms) | avg(aws_elb_latency_average{%{environment_filter}}) * 1000 |
| HTTP Error Rate (%) | sum(aws_elb_httpcode_backend_5_xx_sum{%{environment_filter}}) / sum(aws_elb_request_count_sum{%{environment_filter}}) |
## Configuring Prometheus to monitor for Cloudwatch metrics
To get started with Cloudwatch monitoring, you should install and configure the [Cloudwatch exporter](https://github.com/prometheus/cloudwatch_exporter) which retrieves and parses the specified Cloudwatch metrics and translates them into a Prometheus monitoring endpoint.
Right now, the only AWS resource supported is the Elastic Load Balancer, whose Cloudwatch metrics can be found [here](http://docs.aws.amazon.com/elasticloadbalancing/latest/classic/elb-cloudwatch-metrics.html).
A sample Cloudwatch Exporter configuration file, configured for basic AWS ELB monitoring, is [available for download](../samples/cloudwatch.yml).
## Specifying the Environment label
In order to isolate and only display relevant metrics for a given environment
however, GitLab needs a method to detect which labels are associated. To do this, GitLab will [look for an `environment` label](index.md#identifying-environments).
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