Cost Anomaly Detection in Cloudformation
I'm trying to set up a Cost Anomaly Detection monitor + subscription in Cloudformation.
Creating this via the AWS Console is very easy and user friendly.
I set up a monitor with Linked Account, with a subscription that has a threshold of $100 with daily alert frequency, sending alerts to an e-mail.
Trying to do the above was not as clear when following the documentation and examples at
https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ce-anomalymonitor.html
The documentation does not explain what "dimension" or "type" means in this context, and those terms are not used in the AWS Console.
```
Resources:
AnomalyMonitor100Dollars:
Type: AWS::CE::AnomalyMonitor
Properties:
MonitorName: AnomalyDetected_is_greater_than_100_dollars
MonitorType: CUSTOM
MonitorSpecification: !Sub '
{
"Dimensions" : {
"Key" : "LINKED_ACCOUNT",
"Values" : [ "${AWS::AccountId}" ]
}
}'
AnomalySubscription:
Type: AWS::CE::AnomalySubscription
Properties:
SubscriptionName: AnomalyDetected_is_greater_than_100_dollars
Threshold: 100
Frequency: DAILY
MonitorArnList:
- !Ref AnomalyMonitor100Dollars
Subscribers:
[
{
"Type": "EMAIL",
"Address": "xx@example.com"
}
]
```
Using the above, Cloudformation reports the error
> "Linked accounts can only create AWS Services monitor (Service: CostExplorer, Status Code: 400..."
Guessing wildly, adding `'MonitorDimension: SERVICE'` to the monitor gives the error
> "MonitorDimension must be null for Custom monitor (Service: CostExplorer, Status Code: 400..."
Guessing more wildly, trying to change to `'MonitorType: DIMENSIONAL'` gives the error
> "Expression must be null for Dimensional monitor (Service: CostExplorer, Status Code: 400..."
No idea what expression this refers to.
I'm sure this is logical once you know the implementation, but I have no idea how to do this the correct way.
What am I missing?
