From 1677edc60cbde3ff34fc2412bf05bb48df7515ee Mon Sep 17 00:00:00 2001
From: Omer Aplatony <omerap12@gmail.com>
Date: Wed, 4 Dec 2024 12:37:50 +0200
Subject: [PATCH] balancer: fixed lint issues and add linter to CI

Signed-off-by: Omer Aplatony <omerap12@gmail.com>
---
 .github/workflows/ci.yaml                  |  9 +++++++++
 balancer/main.go                           | 11 +++++++++--
 balancer/pkg/controller/controller_test.go |  9 +++++----
 balancer/pkg/controller/core.go            |  6 +++---
 balancer/pkg/pods/summary.go               |  2 --
 5 files changed, 26 insertions(+), 11 deletions(-)

diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 19e3aedca9cf..edfeb394b14a 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -9,6 +9,8 @@ env:
 
 permissions:
   contents: read
+  checks: write
+  pull-requests: read
 
 jobs:
   test-and-verify:
@@ -37,6 +39,13 @@ jobs:
         run: hack/verify-all.sh -v
         env:
           GO111MODULE: auto
+      
+      - name: golangci-lint - balancer
+        uses: golangci/golangci-lint-action@v6
+        with:
+          args: --timeout=30m
+          working-directory: ${{ env.GOPATH }}/src/k8s.io/autoscaler/balancer
+          version: v1.60
 
       - name: Test
         working-directory: ${{ env.GOPATH }}/src/k8s.io/autoscaler
diff --git a/balancer/main.go b/balancer/main.go
index 38530e528781..d77a7e7afc61 100644
--- a/balancer/main.go
+++ b/balancer/main.go
@@ -19,9 +19,10 @@ package main
 import (
 	"context"
 	"flag"
-	"k8s.io/klog/v2"
 	"time"
 
+	"k8s.io/klog/v2"
+
 	"k8s.io/apimachinery/pkg/util/wait"
 	balancerclientset "k8s.io/autoscaler/balancer/pkg/client/clientset/versioned"
 	balancerinformers "k8s.io/autoscaler/balancer/pkg/client/informers/externalversions"
@@ -91,6 +92,9 @@ func main() {
 
 	scaleKindResolver := scaleclient.NewDiscoveryScaleKindResolver(kubeClient.Discovery())
 	scaleClient, err := scaleclient.NewForConfig(cfg, restMapper, dynamic.LegacyAPIPathResolverFunc, scaleKindResolver)
+	if err != nil {
+		klog.Fatalf("Error creaing ScalesGetter: %s", err.Error())
+	}
 
 	podInformer := kubeInformerFactory.Core().V1().Pods()
 	core := controller.NewCore(controller.NewScaleClient(context.TODO(), scaleClient, restMapper), podInformer)
@@ -105,5 +109,8 @@ func main() {
 	kubeInformerFactory.Start(stopCh)
 	balancerInformerFactory.Start(stopCh)
 
-	controller.Run(concurrency, stopCh)
+	err = controller.Run(concurrency, stopCh)
+	if err != nil {
+		klog.Fatalf("Error: ", err.Error())
+	}
 }
diff --git a/balancer/pkg/controller/controller_test.go b/balancer/pkg/controller/controller_test.go
index 5ee03247c90a..31885b5645af 100644
--- a/balancer/pkg/controller/controller_test.go
+++ b/balancer/pkg/controller/controller_test.go
@@ -37,10 +37,10 @@ import (
 )
 
 type testContext struct {
-	statusInfo      *BalancerStatusInfo
-	balancerError   *BalancerError
-	input           []balancerapi.Balancer
-	core            *fakeCore
+	statusInfo    *BalancerStatusInfo
+	balancerError *BalancerError
+	input         []balancerapi.Balancer
+	// core            *fakeCore
 	controller      *Controller
 	stop            chan struct{}
 	balancerUpdates chan balancerapi.Balancer
@@ -211,6 +211,7 @@ func TestController(t *testing.T) {
 				tc.err,
 				!tc.updateFailed,
 			)
+			//nolint:errcheck
 			go testContext.controller.Run(1, testContext.stop)
 
 			if !tc.updateFailed {
diff --git a/balancer/pkg/controller/core.go b/balancer/pkg/controller/core.go
index 25f1e16c292a..a7003310f356 100644
--- a/balancer/pkg/controller/core.go
+++ b/balancer/pkg/controller/core.go
@@ -49,9 +49,9 @@ type BalancerStatusInfo struct {
 	updated          bool
 }
 
-func newBalancerStatusInfo(replicas int32, updated bool) BalancerStatusInfo {
-	return BalancerStatusInfo{replicasObserved: replicas, updated: updated}
-}
+// func newBalancerStatusInfo(replicas int32, updated bool) BalancerStatusInfo {
+// 	return BalancerStatusInfo{replicasObserved: replicas, updated: updated}
+// }
 
 // core is CoreInferface implementation.
 type core struct {
diff --git a/balancer/pkg/pods/summary.go b/balancer/pkg/pods/summary.go
index 557a680a6d04..79fead2a7fdf 100644
--- a/balancer/pkg/pods/summary.go
+++ b/balancer/pkg/pods/summary.go
@@ -46,13 +46,11 @@ func CalculateSummary(podList []*v1.Pod, now time.Time, startupTimeout time.Dura
 		case v1.PodRunning:
 			result.Total++
 			result.Running++
-			break
 		case v1.PodPending:
 			result.Total++
 			if p.CreationTimestamp.Add(startupTimeout).Before(now) {
 				result.NotStartedWithinDeadline++
 			}
-			break
 		}
 	}
 	return result