feat(lambda): added new property allowAllIpv6Outbound to FunctionOptions

[ashishdhingra]

Issue # (if applicable)

Closes #30994.

Reason for this change

SecurityGroupProps supports allowAllIpv6Outbound property. The existing Lambda FunctionOptions only supports allowAllOutbound, which is used in configureVpc() while creating a new SecurityGroup here.

Description of changes

Added new property allowAllIpv6Outbound to FunctionOptions.

Description of how you validated changes

Added unit and integration tests.

Checklist

• My code adheres to the CONTRIBUTING GUIDE and DESIGN GUIDELINES

---

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

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[pahud]

Just some minor nit

[pahud]

Question - what happens if allowAllOutbound: false with allowAllIpv6Outbound: true? Is it allowed?

Pull request has been modified.

[ashishdhingra]

Question - what happens if allowAllOutbound: false with allowAllIpv6Outbound: true? Is it allowed?

@pahud I will test it tomorrow with ec2.SecurityGroup. As per my understanding, it would not add outbound rule for IPv4.

[pahud]

generally LGTM except for some nit

[pahud]

we are not really deploying vpc in unit tests so I prefer to keep the code as simple as possible

Pull request has been modified.

[ashishdhingra]

Question - what happens if allowAllOutbound: false with allowAllIpv6Outbound: true? Is it allowed?

@pahud I will test it tomorrow with ec2.SecurityGroup. As per my understanding, it would not add outbound rule for IPv4.

@pahud Using the code new ec2.SecurityGroup(this, 'mySecurityGroup', { vpc, allowAllOutbound: false, allowAllIpv6Outbound: true}); results below in the CloudFormation template:

  mySecurityGroup6B1044D0:
    Type: AWS::EC2::SecurityGroup
    Properties:
      GroupDescription: CdktestStack/mySecurityGroup
      SecurityGroupEgress:
        - CidrIp: 255.255.255.255/32
          Description: Disallow all traffic
          FromPort: 252
          IpProtocol: icmp
          ToPort: 86
        - CidrIpv6: ::/0
          Description: Allow all outbound ipv6 traffic by default
          IpProtocol: "-1"
      VpcId:
        Ref: myVpc3CC7CF9E
    Metadata:
      aws:cdk:path: CdktestStack/mySecurityGroup/Resource

Below is deployed Security Group:

Thanks,
Ashish

[lpizzinidev]

Thanks 👍

[lpizzinidev]

Suggested change

	## Outbound traffic
	By default, when creating a Lambda function, it would add a security group outbound rule to allow sending all network traffic (except IPv6). This is controlled by `allowAllOutbound` in function properties, which has a default value of `true`.
	To allow outbound IPv6 traffic by default, explicitly set `allowAllIpv6Outbound` to `true` in function properties as shown below (the default value for `allowAllIpv6Outbound` is `false`):
	```ts
	## Outbound traffic
	By default, when creating a Lambda function, it would add a security group outbound rule to allow sending all network traffic (except IPv6).
	You can override the default behavior by setting the `allowAllOutbound` property to `false`.
	To allow outbound IPv6 traffic by default, explicitly set the `allowAllIpv6Outbound` property to `true`, as shown below.
	The default value for `allowAllIpv6Outbound` is `false`.
	```ts

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