From 5a9661960cd09b721361d68fea1fae7bb257c10e Mon Sep 17 00:00:00 2001
From: Prajjwal Yadav <prajjwalyd@gmail.com>
Date: Thu, 4 Jul 2024 21:07:38 +0530
Subject: [PATCH] Add Kubernetes Version Check to Installation Script (#8025)

* added k8s min version check

* Refactor k8s version check and fix script path

* fix goimports
---
 hack/install.sh                         |  6 ++++
 test/version_check/check_k8s_version.go | 45 +++++++++++++++++++++++++
 2 files changed, 51 insertions(+)
 create mode 100644 test/version_check/check_k8s_version.go

diff --git a/hack/install.sh b/hack/install.sh
index 8f51665c994..5f5e547984a 100755
--- a/hack/install.sh
+++ b/hack/install.sh
@@ -21,6 +21,12 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
+go run "$(dirname "$0")/../test/version_check/check_k8s_version.go"
+if [[ $? -ne 0 ]]; then
+    echo "Kubernetes version check failed. Exiting."
+    exit 1
+fi
+
 export SCALE_CHAOSDUCK_TO_ZERO=1
 export REPLICAS=1
 
diff --git a/test/version_check/check_k8s_version.go b/test/version_check/check_k8s_version.go
new file mode 100644
index 00000000000..09ed2e683d8
--- /dev/null
+++ b/test/version_check/check_k8s_version.go
@@ -0,0 +1,45 @@
+/*
+Copyright 2024 The Knative Authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+	http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package main
+
+import (
+	"fmt"
+	"log"
+
+	"k8s.io/client-go/kubernetes"
+	"knative.dev/pkg/test"
+	"knative.dev/pkg/version"
+)
+
+func main() {
+	config, err := test.Flags.GetRESTConfig()
+	if err != nil {
+		log.Fatalf("Failed to create REST config: %v\n", err)
+	}
+
+	kubeClient, err := kubernetes.NewForConfig(config)
+	if err != nil {
+		log.Fatalf("Failed to create Kubernetes client: %v\n", err)
+	}
+
+	err = version.CheckMinimumVersion(kubeClient.Discovery())
+	if err != nil {
+		log.Fatalf("Error: %v", err)
+	}
+
+	fmt.Println("Kubernetes version is compatible.")
+}