From 4bd66022ce8270ef9211d77df12e5aa341283e8c Mon Sep 17 00:00:00 2001
From: David Mays <david.mays@digital.cabinet-office.gov.uk>
Date: Wed, 10 Apr 2024 15:53:41 +0100
Subject: [PATCH] Add Taint restriction to ARM Nodes

...also fix lint issues.
---
 terraform/deployments/cluster-infrastructure/main.tf | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/terraform/deployments/cluster-infrastructure/main.tf b/terraform/deployments/cluster-infrastructure/main.tf
index 5aca0463f..4470f5c1a 100644
--- a/terraform/deployments/cluster-infrastructure/main.tf
+++ b/terraform/deployments/cluster-infrastructure/main.tf
@@ -70,6 +70,13 @@ locals {
       instance_types        = var.arm_workers_instance_types
       update_config         = { max_unavailable = 1 }
       block_device_mappings = local.main_managed_node_group.main.block_device_mappings
+
+      taint = {
+        key    = "kubernetes.io/arch"
+        value  = "arm64"
+        effect = "NO_SCHEDULE"
+      }
+
       additional_tags = {
         "k8s.io/cluster-autoscaler/enabled"             = "true"
         "k8s.io/cluster-autoscaler/${var.cluster_name}" = "owned"