From d8adb1b5a85bb32332f4239e9270c6bcc48d6a88 Mon Sep 17 00:00:00 2001
From: Paco Xu <paco.xu@daocloud.io>
Date: Thu, 16 Jun 2022 17:07:14 +0800
Subject: [PATCH] fix #74: upgrade node if only one control plane as a
 workaround

---
 operations/upgrade.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/operations/upgrade.go b/operations/upgrade.go
index df45787..1ac24c8 100644
--- a/operations/upgrade.go
+++ b/operations/upgrade.go
@@ -156,7 +156,9 @@ func planNextUpgrade(operation *operatorv1.Operation, version string, c client.C
 		log.Info("failed to list nodes.", "error", err)
 		return items
 	}
-	if len(cpNodes.Items) > 1 {
+	// Workaround: if isServerCanSkip, the only server's kubelet may need to upgrade.
+	// TODO to make more accurate task, we may cut tasks into small ones, for instance, upgrade kubelet only.
+	if len(cpNodes.Items) > 1 || isServerCanSkip {
 
 		t2.Spec.Template.Spec.Commands = append(t2.Spec.Template.Spec.Commands,
 			operatorv1.CommandDescriptor{