Minimum IAM policy required by AWS for Packer to do its thing.https://github.com/mitchellh/packer Permissions are broken out by API functionality and a resource array has been defined with a wild card for each group. For tighter security resource level permissions can be applied per this documentation: http://aws.typepad.com/aws/2013/07/resource…

PackerPolicy.json

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "PackerSecurityGroupAccess",
            "Action": [
                "ec2:CreateSecurityGroup",
                "ec2:DeleteSecurityGroup",
                "ec2:DescribeSecurityGroups",
                "ec2:AuthorizeSecurityGroupIngress",
                "ec2:RevokeSecurityGroupIngress",
                "ec2:AttachVolume",
                "ec2:CreateVolume",
                "ec2:DeleteVolume",
                "ec2:CreateKeypair",
                "ec2:DeleteKeypair",
                "ec2:DescribeSubnets",
                "ec2:CopyImage",
                "ec2:DescribeVolumes",
                "ec2:DetachVolume",
                "ec2:ModifyImageAttribute"
            ],
            "Effect": "Allow",
            "Resource": [
                "*"
            ]
        },
        {
            "Sid": "PackerAMIAccess",
            "Action": [
                "ec2:CreateImage",
                "ec2:RegisterImage",
                "ec2:DeregisterImage",
                "ec2:DescribeImages"
            ],
            "Effect": "Allow",
            "Resource": [
                "*"
            ]
        },
        {
            "Sid": "PackerSnapshotAccess",
            "Action": [
                "ec2:CreateSnapshot",
                "ec2:DeleteSnapshot",
                "ec2:DescribeSnapshots"
            ],
            "Effect": "Allow",
            "Resource": [
                "*"
            ]
        },
        {
            "Sid": "PackerInstanceAccess",
            "Action": [
                "ec2:RunInstances",
                "ec2:StartInstances",
                "ec2:StopInstances",
                "ec2:RebootInstances",
                "ec2:TerminateInstances",
                "ec2:DescribeInstances",
                "ec2:CreateTags"
            ],
            "Effect": "Allow",
            "Resource": [
                "*"
            ]
        },
        {
            "Sid": "PackerKeyPairAccess",
            "Action": [
                "ec2:CreateKeyPair",
                "ec2:DeleteKeyPair",
                "ec2:DescribeKeyPairs"
            ],
            "Effect": "Allow",
            "Resource": [
                "*"
            ]
        },
        {
            "Sid": "PackerS3Access",
            "Action": [
                "s3:Get*",
                "s3:List*",
                "s3:PutObject*",
                "s3:DeleteObject*"
            ],
            "Effect": "Allow",
            "Resource": [
                "*"
            ]
        },
        {
            "Sid": "PackerS3BucketAccess",
            "Action": [
                "s3:ListAllMyBuckets",
                "s3:CreateBucket"
            ],
            "Effect": "Allow",
            "Resource": [
                "*"
            ]
        }
    ]
}