0001-Delete-annotated-machines-first-when-scaling-down.patch

From 63c900811bf02ddaeea04fffe9cbf2e3471788d1 Mon Sep 17 00:00:00 2001
From: Jan Chaloupka <jchaloup@redhat.com>
Date: Fri, 21 Dec 2018 16:02:17 +0100
Subject: [PATCH] Delete annotated machines first when scaling down

---
 .../cluster-api/pkg/controller/machineset/delete_policy.go          | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/vendor/sigs.k8s.io/cluster-api/pkg/controller/machineset/delete_policy.go b/vendor/sigs.k8s.io/cluster-api/pkg/controller/machineset/delete_policy.go
index 2c2a101..9f5e519 100644
--- a/vendor/sigs.k8s.io/cluster-api/pkg/controller/machineset/delete_policy.go
+++ b/vendor/sigs.k8s.io/cluster-api/pkg/controller/machineset/delete_policy.go
@@ -31,10 +31,16 @@ const (
 
 type deletePriorityFunc func(machine *v1alpha1.Machine) deletePriority
 
+// machineDeleteAnnotationKey annotates machines to be delete among first ones
+var machineDeleteAnnotationKey = "sigs.k8s.io/cluster-api-delete-machine"
+
 func simpleDeletePriority(machine *v1alpha1.Machine) deletePriority {
 	if machine.DeletionTimestamp != nil && !machine.DeletionTimestamp.IsZero() {
 		return mustDelete
 	}
+	if _, exists := machine.Annotations[machineDeleteAnnotationKey]; exists {
+		return mustDelete
+	}
 	if machine.Status.ErrorReason != nil || machine.Status.ErrorMessage != nil {
 		return betterDelete
 	}
-- 
2.7.5