Amazon EC2 example two
In the following example, an IAM principal running an Amazon EC2 instance creates and mounts a data volume that is encrypted under a KMS key. This action generates multiple CloudTrail log records. For more information on Amazon EBS and encryption, see Requirements for Amazon EBS encryption.
When the volume is created, Amazon EC2, acting on behalf of the customer, gets an encrypted data
key from Amazon KMS (GenerateDataKeyWithoutPlaintext
). Then it creates a grant
(CreateGrant
) that allows it to decrypt the data key. When the volume is mounted,
Amazon EC2 calls Amazon KMS to decrypt the data key (Decrypt
).
The instanceId
of the Amazon EC2 instance, "i-81e2f56c"
, appears in the
RunInstances
event. The same instance ID qualifies the
granteePrincipal
of the grant that is created
("111122223333:aws:ec2-infrastructure:i-81e2f56c"
) and the assumed role
that is the principal in the Decrypt
call
("arn:aws:sts::111122223333:assumed-role/aws:ec2-infrastructure/i-81e2f56c"
).
The key ARN of the KMS key that protects the data
volume, arn:aws:kms:us-west-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab
, appears in all three Amazon KMS calls
(CreateGrant
, GenerateDataKeyWithoutPlaintext
, and
Decrypt
).
{ "Records": [ { "eventVersion": "1.02", "userIdentity": { "type": "IAMUser", "principalId": "EX_PRINCIPAL_ID", "arn": "arn:aws:iam::111122223333:user/Alice", "accountId": "111122223333", "accessKeyId": "EXAMPLE_KEY_ID", "userName": "Alice" }, "eventTime": "2014-11-05T21:35:27Z", "eventSource": "ec2.amazonaws.com", "eventName": "RunInstances", "awsRegion": "us-west-2", "sourceIPAddress": "192.0.2.0", "userAgent": "Amazon Internal", "requestParameters": { "instancesSet": { "items": [ { "imageId": "ami-b66ed3de", "minCount": 1, "maxCount": 1 } ] }, "groupSet": { "items": [ { "groupId": "sg-98b6e0f2" } ] }, "instanceType": "m3.medium", "blockDeviceMapping": { "items": [ { "deviceName": "/dev/xvda", "ebs": { "volumeSize": 8, "deleteOnTermination": true, "volumeType": "gp2" } }, { "deviceName": "/dev/sdb", "ebs": { "volumeSize": 8, "deleteOnTermination": false, "volumeType": "gp2", "encrypted": true } } ] }, "monitoring": { "enabled": false }, "disableApiTermination": false, "instanceInitiatedShutdownBehavior": "stop", "clientToken": "XdKUT141516171819", "ebsOptimized": false }, "responseElements": { "reservationId": "r-5ebc9f74", "ownerId": "111122223333", "groupSet": { "items": [ { "groupId": "sg-98b6e0f2", "groupName": "launch-wizard-2" } ] }, "instancesSet": { "items": [ { "instanceId": "i-81e2f56c", "imageId": "ami-b66ed3de", "instanceState": { "code": 0, "name": "pending" }, "amiLaunchIndex": 0, "productCodes": { }, "instanceType": "m3.medium", "launchTime": 1415223328000, "placement": { "availabilityZone": "us-east-1a", "tenancy": "default" }, "monitoring": { "state": "disabled" }, "stateReason": { "code": "pending", "message": "pending" }, "architecture": "x86_64", "rootDeviceType": "ebs", "rootDeviceName": "/dev/xvda", "blockDeviceMapping": { }, "virtualizationType": "hvm", "hypervisor": "xen", "clientToken": "XdKUT1415223327917", "groupSet": { "items": [ { "groupId": "sg-98b6e0f2", "groupName": "launch-wizard-2" } ] }, "networkInterfaceSet": { }, "ebsOptimized": false } ] } }, "requestID": "41c4b4f7-8bce-4773-bf0e-5ae3bb5cbce2", "eventID": "cd75a605-2fee-4fda-b847-9c3d330ebaae", "eventType": "AwsApiCall", "recipientAccountId": "111122223333" }, { "eventVersion": "1.02", "userIdentity": { "type": "IAMUser", "principalId": "EX_PRINCIPAL_ID", "arn": "arn:aws:iam::111122223333:user/Alice", "accountId": "111122223333", "accessKeyId": "EXAMPLE_KEY_ID", "userName": "Alice" }, "eventTime": "2014-11-05T21:35:35Z", "eventSource": "kms.amazonaws.com", "eventName": "CreateGrant", "awsRegion": "us-east-1", "sourceIPAddress": "192.0.2.0", "userAgent": "Amazon Internal", "requestParameters": { "constraints": { "encryptionContextSubset": { "aws:ebs:id": "vol-f67bafb2" } }, "granteePrincipal": "111122223333:aws:ec2-infrastructure:i-81e2f56c", "keyId": "arn:aws:kms:us-west-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab" }, "responseElements": { "grantId": "abcde1237f76e4ba7987489ac329fbfba6ad343d6f7075dbd1ef191f0120514a" }, "requestID": "41c4b4f7-8bce-4773-bf0e-5ae3bb5cbce2", "eventID": "c1ad79e3-0d3f-402a-b119-d5c31d7c6a6c", "readOnly": false, "resources": [ { "ARN": "arn:aws:kms:us-west-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab", "accountId": "111122223333" } ], "eventType": "AwsApiCall", "recipientAccountId": "111122223333" }, { "eventVersion": "1.02", "userIdentity": { "type": "IAMUser", "principalId": "EX_PRINCIPAL_ID", "arn": "arn:aws:iam::111122223333:user/Alice", "accountId": "111122223333", "accessKeyId": "EXAMPLE_KEY_ID", "userName": "Alice" }, "eventTime": "2014-11-05T21:35:32Z", "eventSource": "kms.amazonaws.com", "eventName": "GenerateDataKeyWithoutPlaintext", "awsRegion": "us-east-1", "sourceIPAddress": "192.0.2.0", "userAgent": "Amazon Internal", "requestParameters": { "encryptionContext": { "aws:ebs:id": "vol-f67bafb2" }, "numberOfBytes": 64, "keyId": "alias/aws/ebs" }, "responseElements": null, "requestID": "create-111122223333-758247346-1415223332", "eventID": "ac3cab10-ce93-4953-9d62-0b6e5cba651d", "readOnly": true, "resources": [ { "ARN": "arn:aws:kms:us-west-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab", "accountId": "111122223333" } ], "eventType": "AwsApiCall", "recipientAccountId": "111122223333" }, { "eventVersion": "1.02", "userIdentity": { "type": "AssumedRole", "principalId": "111122223333:aws:ec2-infrastructure:i-81e2f56c", "arn": "arn:aws:sts::111122223333:assumed-role/aws:ec2-infrastructure/i-81e2f56c", "accountId": "111122223333", "accessKeyId": "", "sessionContext": { "attributes": { "mfaAuthenticated": "false", "creationDate": "2014-11-05T21:35:38Z" }, "sessionIssuer": { "type": "Role", "principalId": "111122223333:aws:ec2-infrastructure", "arn": "arn:aws:iam::111122223333:role/aws:ec2-infrastructure", "accountId": "111122223333", "userName": "aws:ec2-infrastructure" } } }, "eventTime": "2014-11-05T21:35:47Z", "eventSource": "kms.amazonaws.com", "eventName": "Decrypt", "awsRegion": "us-east-1", "sourceIPAddress": "192.0.2.0", "requestParameters": { "encryptionContext": { "aws:ebs:id": "vol-f67bafb2" } }, "responseElements": null, "requestID": "b4b27883-6533-11e4-b4d9-751f1761e9e5", "eventID": "edb65380-0a3e-4123-bbc8-3d1b7cff49b0", "readOnly": true, "resources": [ { "ARN": "arn:aws:kms:us-west-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab", "accountId": "111122223333" } ], "eventType": "AwsApiCall", "recipientAccountId": "111122223333" } ] }