AWS Amazon EC2 Sg Attachment
This page shows how to write Terraform and CloudFormation for Amazon EC2 Sg Attachment and write them securely.
aws_network_interface_sg_attachment (Terraform)
The Sg Attachment in Amazon EC2 can be configured in Terraform with the resource name aws_network_interface_sg_attachment. The following sections describe 1 example of how to use the resource and its parameters.
Example Usage from GitHub
resource "aws_network_interface_sg_attachment" "db_sg_attachment" {
security_group_id = aws_security_group.db_sg.id
network_interface_id = aws_db_instance.dbserver.primary_network_interface_id
}
resource "aws_instance" "webserver" {
ami = "ami-06ce3edf0cff21f07"
Parameters
-
idoptional computed - string -
network_interface_idrequired - string -
security_group_idrequired - string
Explanation in Terraform Registry
This resource attaches a security group to an Elastic Network Interface (ENI). It can be used to attach a security group to any existing ENI, be it a secondary ENI or one attached as the primary interface on an instance.
NOTE on instances, interfaces, and security groups: Terraform currently provides the capability to assign security groups via the [
aws_instance][1] and the [aws_network_interface][2] resources. Using this resource in conjunction with security groups provided in-line in those resources will cause conflicts, and will lead to spurious diffs and undefined behavior - please use one or the other. [1]: https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/instance > [2]: https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/network_interface
Tips: Best Practices for The Other AWS Amazon EC2 Resources
In addition to the aws_default_vpc, AWS Amazon EC2 has the other resources that should be configured for security reasons. Please check some examples of those resources and precautions.
aws_default_vpc
Ensure to avoid using default VPC
It is better to define the own VPC and use it.
aws_network_acl_rule
Ensure your network ACL rule blocks unwanted inbound traffic
It is better to block unwanted inbound traffic.
aws_ebs_volume
Ensure to use a customer-managed key for EBS volume encryption
It is better to use a customer-managed key for EBS volume encryption. It can be gain more control over the encryption by using customer-managed keys (CMK).
aws_instance
Ensure to avoid storing AWS access keys in user data
It is better to avoid storing AWS access keys in user data. `aws_iam_instance_profile` could be used instead.
aws_security_group
Ensure your security group blocks unwanted inbound traffic
It is better to block unwanted inbound traffic.
AWS::EC2::NetworkInterfaceAttachment (CloudFormation)
The NetworkInterfaceAttachment in EC2 can be configured in CloudFormation with the resource name AWS::EC2::NetworkInterfaceAttachment. The following sections describe 10 examples of how to use the resource and its parameters.
Example Usage from GitHub
Type: AWS::EC2::NetworkInterfaceAttachment
Properties:
InstanceId:
Ref: MyEC2Instance
NetworkInterfaceId:
Ref: Eth1
Type: AWS::EC2::NetworkInterfaceAttachment
Properties:
DeviceIndex: 1
InstanceId: !Ref VM01
NetworkInterfaceId: !FindInMap [ prd, ServerName, NetworkInterfaceMgrId ]
################################
Type: AWS::EC2::NetworkInterfaceAttachment
Properties:
InstanceId: !Ref PANec2Instance
NetworkInterfaceId: !Ref PublicENI
DeviceIndex: 1
Type: AWS::EC2::NetworkInterfaceAttachment
Properties:
InstanceId:
Ref: EC2Instance1
NetworkInterfaceId:
Ref: Instance1ENI1
Type: AWS::EC2::NetworkInterfaceAttachment
Properties:
DeviceIndex: 1
InstanceId: !Ref HelloInstance
NetworkInterfaceId: !Ref HelloEni
"Type": "AWS::EC2::NetworkInterfaceAttachment",
"Properties": {
"DeviceIndex": "3",
"NetworkInterfaceId": {
"Ref": "AWSNetworkInterfacePaloAlto3"
},
"Type": "AWS::EC2::NetworkInterfaceAttachment",
"Properties": {
"DeviceIndex": "3",
"NetworkInterfaceId": {
"Ref": "AWSNetworkInterfacePaloAlto3"
},
"Type": "AWS::EC2::NetworkInterfaceAttachment",
"Properties": {
"InstanceId": {
"Ref": "Ec2Instance"
},
"NetworkInterfaceId": {
"Type": "AWS::EC2::NetworkInterfaceAttachment",
"Properties": {
"InstanceId": {
"Ref": "Ec2Instance"
},
"NetworkInterfaceId": {
"Type" : "AWS::EC2::NetworkInterfaceAttachment",
"Condition": "SBCSeparateServer",
"Properties" : {
"DeleteOnTermination" : "true",
"DeviceIndex" : "1",
"InstanceId" : {"Ref" : "EMSInstance"},
Parameters
-
DeleteOnTerminationoptional - Boolean -
DeviceIndexrequired - String -
InstanceIdrequired - String -
NetworkInterfaceIdrequired - String
Explanation in CloudFormation Registry
Attaches an elastic network interface (ENI) to an Amazon EC2 instance. You can use this resource type to attach additional network interfaces to an instance without interruption.
Frequently asked questions
What is AWS Amazon EC2 Sg Attachment?
AWS Amazon EC2 Sg Attachment is a resource for Amazon EC2 of Amazon Web Service. Settings can be wrote in Terraform and CloudFormation.
Where can I find the example code for the AWS Amazon EC2 Sg Attachment?
For Terraform, the mattcharlton/kpmg source code example is useful. See the Terraform Example section for further details.
For CloudFormation, the libert-xyz/cloudformation-templates, m-oka-system/aws-cloudformation and wpacket/pan-aws-cf source code examples are useful. See the CloudFormation Example section for further details.
