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fix(infra): look up the live office VPN gateway (PLAT-77) (#57)

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* fix(infra): look up the live office VPN gateway (PLAT-77)

The gateway tagged syslog-server-office is deleted, so the plan cannot find a route target for the office LANs.

* fix(infra): select the office VPN gateway by id (PLAT-77)

A state-and-VPC lookup is not unique once syslog recreates its deleted gateway. The workspace variable pins the gateway that is carrying office traffic.
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Adam Moussa 2026-09-29 22:49:31 +00:00 • committed by GitHub
parent 7c72159f31
commit 9f27827dcb
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3 changed files with 16 additions and 9 deletions
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2
README.md
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@ -89,7 +89,7 @@ Prod changes go through HCP Terraform workspace `file-share-prod` (manual apply
The management-account CDK workflow no longer runs on push. `workflow_dispatch` remains for an explicit rollback of that stack.
The instance has no public IP. Its route table sends `10.10.0.0/16` and `10.30.0.0/16` through the syslog VPN gateway and everything else through a NAT gateway in the syslog public subnet. `10.10.0.0/16` is the Ronkonkoma office LAN and `10.30.0.0/16` is the Locust office LAN, the same pair the syslog VPN already routes. `10.20.0.0/16` is the management VPC and is not routed here.
The instance has no public IP. Its route table sends `10.10.0.0/16` and `10.30.0.0/16` through the VPN gateway in workspace variable `vpn_gateway_id` and everything else through a NAT gateway in the syslog public subnet. `10.10.0.0/16` is the Ronkonkoma office LAN and `10.30.0.0/16` is the Locust office LAN, the same pair the syslog VPN already routes. `10.20.0.0/16` is the management VPC and is not routed here.
Clients use the private IP. Office routing must include `10.40.20.0/24` on the existing syslog IPsec before SMB from the office will work. A check from `10.10.70.0/24` on 2026-09-28 reached the gateway for `10.40.10.254` and got no hop-1 reply for `10.40.20.1`. The nightly DLM policy targets volumes tagged `file-share-backup=true`. Tag the copied volume with that key at cutover.

13
terraform/network.tf
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@ -12,13 +12,10 @@ data "aws_internet_gateway" "syslog" {
}
}
# syslog state still names a deleted gateway syslog-server-office.
# vpn_gateway_id selects the gateway that is actually carrying office traffic.
data "aws_vpn_gateway" "syslog" {
filter {
name = "tag:Name"
values = ["syslog-server-office"]
}
attached_vpc_id = data.aws_vpc.syslog.id
id = var.vpn_gateway_id
}
data "aws_subnet" "syslog_public" {
@ -86,8 +83,8 @@ resource "aws_subnet" "file_share" {
}
precondition {
condition = data.aws_vpn_gateway.syslog.attached_vpc_id == data.aws_vpc.syslog.id
error_message = "syslog VPN gateway is not attached to the syslog VPC."
condition = data.aws_vpn_gateway.syslog.state == "available" && data.aws_vpn_gateway.syslog.attached_vpc_id == data.aws_vpc.syslog.id
error_message = "vpn_gateway_id must be an available VPN gateway attached to the syslog VPC."
}
}
}

10
terraform/variables.tf
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@ -41,6 +41,16 @@ variable "filebrowser_password_secret_arn" {
}
}
variable "vpn_gateway_id" {
description = "VPN gateway that carries office traffic into the syslog VPC. Set as an HCP workspace variable. The gateway named syslog-server-office in syslog state is deleted."
type = string
validation {
condition = startswith(var.vpn_gateway_id, "vgw-")
error_message = "vpn_gateway_id must be a VPN gateway id."
}
}
variable "data_volume_id" {
description = "Imported data volume id. Empty until cutover. Terraform attaches this volume and must not create or delete it."
type = string