CloudTrail shows events, similar to the following example:
{
"eventVersion": "1.05",
"userIdentity": {
"accountId": "123456789012",
"invokedBy": "AWS Internal"
},
"eventTime": "2020-03-12T20:22:12Z",
"eventSource": "ecr.amazonaws.com",
"eventName": "PolicyExecutionEvent",
"awsRegion": "us-west-2",
"sourceIPAddress": "AWS Internal",
"userAgent": "AWS Internal",
"requestParameters": null,
"responseElements": null,
"eventID": "9354dd7f-9aac-4e9d-956d-12561a4923aa",
"readOnly": true,
"resources": [{
"ARN": "arn:aws:ecr:us-west-2:123456789012:repository/testrepo",
"accountId": "123456789012",
"type": "AWS::ECR::Repository"
}],
"eventType": "AwsServiceEvent",
"recipientAccountId": "123456789012",
"serviceEventDetails": {
"repositoryName": "testrepo",
"lifecycleEventPolicy": {
"lifecycleEventRules": [{
"rulePriority": 1,
"description": "remove all images > 2",
"lifecycleEventSelection": {
"tagStatus": "Any",
"tagPrefixList": [],
"countType": "Image count more than",
"countNumber": 2
},
"action": "expire"
}],
"lastEvaluatedAt": 0,
"policyVersion": 1,
"policyId": "ceb86829-58e7-9498-920c-aa042e33037b"
},
"lifecycleEventImageActions": [{
"lifecycleEventImage": {
"digest": "sha256:ddba4d27a7ffc3f86dd6c2f92041af252a1f23a8e742c90e6e1297bfa1bc0c45",
"tagStatus": "Tagged",
"tagList": ["alpine"],
"pushedAt": 1584042813000
},
"rulePriority": 1
}, {
"lifecycleEventImage": {
"digest": "sha256:6ab380c5a5acf71c1b6660d645d2cd79cc8ce91b38e0352cbf9561e050427baf",
"tagStatus": "Tagged",
"tagList": ["centos"],
"pushedAt": 1584042842000
},
"rulePriority": 1
}]
}
}