From 46c56c99d9a86cdbb50646247e415d6a68dd144e Mon Sep 17 00:00:00 2001
From: nicolaferraro <ni.ferraro@gmail.com>
Date: Mon, 4 Apr 2022 12:36:35 +0200
Subject: [PATCH] operator: add feature gate for maintenance mode

---
 .../featuregates/centralized_configuration.go |  2 +-
 .../k8s/pkg/resources/featuregates/common.go  | 14 ++++++++
 .../featuregates/maintenance_mode.go          | 32 +++++++++++++++++++
 3 files changed, 47 insertions(+), 1 deletion(-)
 create mode 100644 src/go/k8s/pkg/resources/featuregates/common.go
 create mode 100644 src/go/k8s/pkg/resources/featuregates/maintenance_mode.go

diff --git a/src/go/k8s/pkg/resources/featuregates/centralized_configuration.go b/src/go/k8s/pkg/resources/featuregates/centralized_configuration.go
index 56a1b14c56d9..61193916edee 100644
--- a/src/go/k8s/pkg/resources/featuregates/centralized_configuration.go
+++ b/src/go/k8s/pkg/resources/featuregates/centralized_configuration.go
@@ -19,7 +19,7 @@ const (
 // CentralizedConfiguration feature gate should be removed when the operator
 // will no longer support 21.x or older versions
 func CentralizedConfiguration(version string) bool {
-	if version == "dev" {
+	if version == devVersion {
 		// development version contains this feature
 		return true
 	}
diff --git a/src/go/k8s/pkg/resources/featuregates/common.go b/src/go/k8s/pkg/resources/featuregates/common.go
new file mode 100644
index 000000000000..f763da157730
--- /dev/null
+++ b/src/go/k8s/pkg/resources/featuregates/common.go
@@ -0,0 +1,14 @@
+// Copyright 2022 Redpanda Data, Inc.
+//
+// Use of this software is governed by the Business Source License
+// included in the file licenses/BSL.md
+//
+// As of the Change Date specified in that file, in accordance with
+// the Business Source License, use of this software will be governed
+// by the Apache License, Version 2.0
+
+package featuregates
+
+const (
+	devVersion = "dev"
+)
diff --git a/src/go/k8s/pkg/resources/featuregates/maintenance_mode.go b/src/go/k8s/pkg/resources/featuregates/maintenance_mode.go
new file mode 100644
index 000000000000..f6f6fe93db3a
--- /dev/null
+++ b/src/go/k8s/pkg/resources/featuregates/maintenance_mode.go
@@ -0,0 +1,32 @@
+// Copyright 2022 Redpanda Data, Inc.
+//
+// Use of this software is governed by the Business Source License
+// included in the file licenses/BSL.md
+//
+// As of the Change Date specified in that file, in accordance with
+// the Business Source License, use of this software will be governed
+// by the Apache License, Version 2.0
+
+package featuregates
+
+import "github.com/Masterminds/semver/v3"
+
+const (
+	maintenanceModeMajor = uint64(22)
+	maintenanceModeMinor = uint64(1)
+)
+
+// MaintenanceMode feature gate should be removed when the operator
+// will no longer support 21.x or older versions
+func MaintenanceMode(version string) bool {
+	if version == devVersion {
+		// development version contains this feature
+		return true
+	}
+	v, err := semver.NewVersion(version)
+	if err != nil {
+		return false
+	}
+
+	return v.Major() == maintenanceModeMajor && v.Minor() >= maintenanceModeMinor || v.Major() > maintenanceModeMajor
+}