From 319dca3e82a78721c85187b783ec735e45e9f826 Mon Sep 17 00:00:00 2001
From: Brad Davidson <brad.davidson@rancher.com>
Date: Wed, 13 Dec 2023 00:28:26 +0000
Subject: [PATCH] Fix nil map in full snapshot configmap reconcile

If a full reconcile wins the race against sync of an individual snapshot resource, or someone intentionally deletes the configmap, the data map could be nil and cause a crash.

Signed-off-by: Brad Davidson <brad.davidson@rancher.com>
---
 pkg/etcd/snapshot_controller.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pkg/etcd/snapshot_controller.go b/pkg/etcd/snapshot_controller.go
index b5e3be3225..295f0117e4 100644
--- a/pkg/etcd/snapshot_controller.go
+++ b/pkg/etcd/snapshot_controller.go
@@ -252,6 +252,10 @@ func (e *etcdSnapshotHandler) reconcile() error {
 		}
 	}
 
+	if len(snapshots) > 0 && snapshotConfigMap.Data == nil {
+		snapshotConfigMap.Data = map[string]string{}
+	}
+
 	// Ensure keys for existing snapshots
 	for sfKey, esf := range snapshots {
 		sf := snapshotFile{}