From ba3fa6e46d7e6f875f65ab4fc9260090417295c2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gon=C3=A7alo=20Rodrigues?= <guga@Goncalos-MacBook-Pro.local>
Date: Fri, 26 Jun 2026 22:28:33 +0100
Subject: [PATCH] fix(infra): switch MongoDB to 7 LTS (jemalloc, ARM64 stable)

MongoDB 8.x (both 8.0 and 8.2) uses tcmalloc-google which segfaults
(exit 139) on Hetzner ARM64 kernels with transparent hugepages disabled.
MongoDB 7 LTS uses jemalloc and runs cleanly on the same hardware.
PVC was already wiped so there is no FCV incompatibility.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
---
 infrastructure/terraform/mongodb.tf | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/infrastructure/terraform/mongodb.tf b/infrastructure/terraform/mongodb.tf
index 6cd6a75..96a7ddd 100644
--- a/infrastructure/terraform/mongodb.tf
+++ b/infrastructure/terraform/mongodb.tf
@@ -76,7 +76,7 @@ resource "kubernetes_stateful_set" "mongodb" {
       spec {
         container {
           name  = "mongodb"
-          image = "mongo:8.0"
+          image = "mongo:7"
 
           env {
             name  = "MONGO_INITDB_ROOT_USERNAME"