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+---
+menu:
+    main:
+        parent: "Exporting Metrics (Surfacers)"
+        weight: 30
+title: "Cloudwatch (AWS Cloud Monitoring)"
+date: 2021-04-04T19:37:00+01:00
+---
+Cloudprober can natively export metrics to AWS Cloudwatch using the cloudwatch [surfacer](/surfacers/overview). Adding the cloudwatch surfacer to cloudprover is as simple as adding the following stanza to the config:
+
+```
+surfacer {
+  type: CLOUDWATCH
+}
+```
+
+## Authentication
+
+The cloudwatch surfacer uses the AWS Go SDK, and supports the [default credential chain](https://docs.aws.amazon.com/sdk-for-go/v2/developer-guide/configuring-sdk.html):
+
+1. Environment variables.
+2. Shared credentials file.
+3. If your application uses an ECS task definition or RunTask API operation, IAM role for tasks.
+4. If your application is running on an Amazon EC2 instance, IAM role for Amazon EC2.
+
+## Authorization
+
+In order to permit cloudprober to publish metric data to cloudwatch, ensure the profile being used for authentication has the following permissions, where the "cloudwatch:namespace" is the [metric namespace](#metric-namespace) used by cloudprober.
+
+If the default metric namespace is changed, also change the condition in the IAM policy below to match the same value.
+
+```
+{
+    "Version": "2012-10-17",
+    "Statement": [
+        {
+            "Condition": {
+                "StringEqualsIgnoreCase": {
+                    "cloudwatch:namespace": "cloudprober"
+                }
+            },
+            "Action": [
+                "cloudwatch:PutMetricData"
+            ],
+            "Resource": [
+                "*"
+            ],
+            "Effect": "Allow",
+            "Sid": "PutMetrics"
+        }
+    ]
+}
+```
+
+## [Metric Namespace](https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/cloudwatch_concepts.html#Namespace)
+
+The metric namespace used to publish metrics to by default is set to `cloudprober`. This can be changed by expanding the surfacer configuration:
+
+```
+surfacer {
+  type: CLOUDWATCH
+
+  cloudwatch_surfacer {
+    namespace: "/cloudprober/website/probes"
+  }
+}
+```
+
+Note: If the namespace is modified, also modify the [IAM policy condition](#authorization) for the namespace PutMetricData call.
+
+## Configuration Options
+
+The full list of configuration options for the cloudwatch surfacer is:
+
+```protobuf
+  // The cloudwatch metric namespace
+  optional string namespace = 1 [default = "cloudprober"];
+
+  // The cloudwatch resolution value, lowering this below 60 will incur
+  // additional charges as the metrics will be charged at a high resolution rate.
+  optional int64 resolution = 2 [default=60];
+
+  // If allowed_metrics_regex is specified, only metrics matching the given
+  // regular expression will be exported to cloudwatch. This will be evaluated
+  // against both the probe type and probe name.
+  // Example:
+  // allowed_metrics_regex: "(http|ping)"
+  optional string allowed_metrics_regex = 3;
+```
+
+(Source: https://github.com/google/cloudprober/blob/master/surfacers/cloudwatch/proto/config.proto)
+
+## Calculating the metric delta with Cloudwatch Metric Maths
+
+The metrics produced by cloudprober are cumulative. Most services producing metrics into cloudwatch produce snapshot data whereby the metrics are recorded for a specific point in time.
+
+In order to achieve a similar effect here, the [Cloudwatch Metric Maths](https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/using-metric-math.html) RATE and PERIOD functions can be used to determine the delta values.
+
+```
+RATE(m1) * PERIOD(m1)
+```
+
+Whereby m1 is the metric id for the cloudprober metrics, for example:
+
+```
+namespace: cloudprober
+metric name: latency
+dst: google.com
+ptype: http
+probe: probe name
+```