[terraform] Make Tunnelbroker deployments more future-proof
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Authored by bartek on Sep 17 2024, 4:37 AM.

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will
kamil

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rCOMMde4a5b45fcfb: [terraform] Make Tunnelbroker deployments more future-proof

Summary

Tunnelbroker deployments on prod sometimes failed due to The target group tunnelbroker-grpc-tg does not have an associated load balancer.
This was due to disabled LB listener for gRPC, so the target group had no listeners.
Detaching the ECS Service from adding Tunnelbroker to this blind target group resolved the issue.
Added appropriate comments

Test Plan

Terraform apply succeeded on prod after previously failing with the message. Opened AWS Console and made sure Tunnelbroker is not registered to the gRPC target group.

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Event Timeline

bartek created this revision.Sep 17 2024, 4:37 AM

bartek held this revision as a draft.

Herald added subscribers: tomek, ashoat. · View Herald TranscriptSep 17 2024, 4:37 AM

bartek published this revision for review.Sep 17 2024, 4:43 AM

Harbormaster completed remote builds in B31663: Diff 44266.Sep 17 2024, 4:54 AM

will added inline comments.Sep 17 2024, 8:00 AM

services/terraform/remote/service_tunnelbroker.tf
190	Just double checking my understanding. Because there won't be any listeners, essentially this `for_each` will result in no `load_balancer" blocks actually being deployed. Why do we still need this block in the first place? Testing purposes?

bartek added inline comments.Sep 17 2024, 11:57 PM

services/terraform/remote/service_tunnelbroker.tf
190	We want it for staging, and yes, for "testing purposes". Just double checking my understanding. Because there won't be any listeners, essentially this for_each will result in no `load_balancer" blocks actually being deployed. Yes, exactly. No `load_balancer` blocks on prod, and one on staging. In `resource "aws_lb_listener" "tunnelbroker_grpc"` at the bottom of this file, there's a `count = staging ? 1 : 0`.