Associate VPC with an existing VPN gateway

[jeroenjacobs79]

When you create a new VPC in TerraForm, is there a way to associate it with an already existing VPN gateway?

Something similar to how "aws_route_table_association" can be used to associate an existing routing table to a subnet?

[stack72]

Hi @jeroenjacobs1205

there is currently no such resource for this. A simple aws_vpn_gateway_attachment resource could be added that effectively uses this call http://docs.aws.amazon.com/cli/latest/reference/ec2/attach-vpn-gateway.html

This isn't going to be high on the list right now, so if you feel you could open a PR for this, then it would be gratefully received :)

Paul

[kwilczynski]

To add.

API documentation for posterity:

https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_AttachVpnGateway.html
https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_DetachVpnGateway.html
https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_DescribeVpnGateways.html
https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_VpnGateway.html
https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_VpcAttachment.html

Errors:

http://docs.aws.amazon.com/AWSEC2/latest/APIReference/errors-overview.html

Go SDK:

https://docs.aws.amazon.com/sdk-for-go/api/service/ec2/

This should not be hard to add, I will have a look at it.

[dhait]

As per @stack72, we use a separate bash script to do the attachment, which is attached to a null_resource and triggered by the creation of the vpc.

Here's the idea:
https://gist.github.com/dhait/900852d794aa17140a148af03fc81b30

[kwilczynski]

To add.

The aws_vpn_gateway resource will be updated to make the VPC ID a computed attribute. Since upon the attachement it would refresh VPN Gateway state and then notice that it now is attached and the VPC ID was populated.

[kwilczynski]

I am working on this in #7870.

[stack72]

Closed via #7870

[ghost]

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