IAM policy for the Packer Builder

policy.json

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "NonResourceBasedReadOnlyPermissions",
            "Effect": "Allow",
            "Action": [
                "ec2:DescribeVolumes",
                "ec2:DescribeKeyPairs",
                "ec2:DescribeSecurityGroups",
                "ec2:DescribeSubnets",
                "ec2:DescribeSnapshots",
                "ec2:DescribeInstances",
                "ec2:DescribeImages"
            ],
            "Resource": "*"
        },
        {
            "Sid": "NonResourceBasedReadOnlyPermissionsForSpotInstanceUsage",
            "Effect": "Allow",
            "Action": [
                "ec2:DescribeSpotPriceHistory",
                "ec2:DescribeSpotInstanceRequests"
            ],
            "Resource": "*"
        },
        {
            "Sid": "NonResourceBasedWritePermissions",
            "Effect": "Allow",
            "Action": [
                "ec2:RegisterImage",
                "ec2:ModifyInstanceAttribute",
                "ec2:ModifyImageAttribute",
                "ec2:DeleteSnapshot",
                "ec2:DeleteKeyPair",
                "ec2:CreateVolume",
                "ec2:CreateTags",
                "ec2:CreateSnapshot",
                "ec2:CreateSecurityGroup",
                "ec2:CreateKeyPair",
                "ec2:CreateImage",
                "ec2:CopyImage"
            ],
            "Resource": "*"
        },
        {
            "Sid": "NonResourceBasedWritePermissionsForSpotInstanceUsage",
            "Effect": "Allow",
            "Action": [
                "ec2:RequestSpotInstances",
                "ec2:CancelSpotInstanceRequests"
            ],
            "Resource": "*"
        },
        {
            "Sid": "IAMPassroleToInstance",
            "Effect": "Allow",
            "Action": "iam:PassRole",
            "Resource": "arn:aws:iam::111111111111:role/PackerBuilder"
        },
        {
            "Sid": "AllowInstanceActions",
            "Effect": "Allow",
            "Action": [
                "ec2:TerminateInstances",
                "ec2:StopInstances",
                "ec2:DetachVolume",
                "ec2:AttachVolume"
            ],
            "Resource": "arn:aws:ec2:us-east-1:111111111111:instance/*",
            "Condition": {
                "StringEquals": {
                    "ec2:InstanceProfile": "arn:aws:iam::111111111111:instance-profile/packer_builder"
                }
            }
        },
        {
            "Sid": "EC2RunInstances",
            "Effect": "Allow",
            "Action": "ec2:RunInstances",
            "Resource": "arn:aws:ec2:us-east-1:111111111111:instance/*",
            "Condition": {
                "StringEquals": {
                    "ec2:InstanceProfile": "arn:aws:iam::111111111111:instance-profile/packer_builder"
                }
            }
        },
        {
            "Sid": "EC2RunInstancesSubnet",
            "Effect": "Allow",
            "Action": "ec2:RunInstances",
            "Resource": "arn:aws:ec2:us-east-1:111111111111:subnet/*",
            "Condition": {
                "StringEquals": {
                    "ec2:vpc": "arn:aws:ec2:us-east-1:111111111111:vpc/vpc-11111111"
                }
            }
        },
        {
            "Sid": "RemainingRunInstancePermissions",
            "Effect": "Allow",
            "Action": "ec2:RunInstances",
            "Resource": [
                "arn:aws:ec2:us-east-1::snapshot/*",
                "arn:aws:ec2:us-east-1::image/*",
                "arn:aws:ec2:us-east-1:111111111111:volume/*",
                "arn:aws:ec2:us-east-1:111111111111:subnet/*",
                "arn:aws:ec2:us-east-1:111111111111:security-group/*",
                "arn:aws:ec2:us-east-1:111111111111:network-interface/*",
                "arn:aws:ec2:us-east-1:111111111111:key-pair/*"
            ]
        },
        {
            "Sid": "EC2VpcNonresourceSpecificActions",
            "Effect": "Allow",
            "Action": [
                "ec2:DeleteSecurityGroup",
                "ec2:AuthorizeSecurityGroupIngress"
            ],
            "Resource": "*",
            "Condition": {
                "StringEquals": {
                    "ec2:vpc": "arn:aws:ec2:us-east-1:111111111111:vpc/vpc-11111111"
                }
            }
        }
    ]
}

This allows Packer to launch instances in a specific VPC with a specific instance profile, and only terminate those.