Mocks for k8s client/node drainer

internal/k8s/kubernetes.go

@@ -1,3 +1,5 @@
+//go:generate mockgen -destination ./mock/kubernetes.go . Client
+
 package k8s
 
 import (
@@ -44,32 +46,49 @@ const (
 	DefaultMaxRetriesK8SOperation = 5
 )
 
+type Client interface {
+	PatchNode(ctx context.Context, node *v1.Node, changeFn func(*v1.Node)) error
+	PatchNodeStatus(ctx context.Context, name string, patch []byte) error
+	EvictPod(ctx context.Context, pod v1.Pod, podEvictRetryDelay time.Duration, version schema.GroupVersion) error
+	CordonNode(ctx context.Context, node *v1.Node) error
+	GetNodeByIDs(ctx context.Context, nodeName, nodeID, providerID string) (*v1.Node, error)
+	ExecuteBatchPodActions(
+		ctx context.Context,
+		pods []*v1.Pod,
+		action func(context.Context, v1.Pod) error,
+		actionName string,
+	) ([]*v1.Pod, []PodActionFailure)
+	DeletePod(ctx context.Context, options metav1.DeleteOptions, pod v1.Pod, podDeleteRetries int, podDeleteRetryDelay time.Duration) error
+	Clientset() kubernetes.Interface
+	Log() logrus.FieldLogger
+}
+
 // Client provides Kubernetes operations with common dependencies.
-type Client struct {
+type client struct {
 	clientset kubernetes.Interface
 	log       logrus.FieldLogger
 }
 
 // NewClient creates a new K8s client with the given dependencies.
-func NewClient(clientset kubernetes.Interface, log logrus.FieldLogger) *Client {
-	return &Client{
+func NewClient(clientset kubernetes.Interface, log logrus.FieldLogger) Client {
+	return &client{
 		clientset: clientset,
 		log:       log,
 	}
 }
 
 // Clientset returns the underlying kubernetes.Interface.
-func (c *Client) Clientset() kubernetes.Interface {
+func (c *client) Clientset() kubernetes.Interface {
 	return c.clientset
 }
 
 // Log returns the logger.
-func (c *Client) Log() logrus.FieldLogger {
+func (c *client) Log() logrus.FieldLogger {
 	return c.log
 }
 
 // PatchNode patches a node with the given change function.
-func (c *Client) PatchNode(ctx context.Context, node *v1.Node, changeFn func(*v1.Node)) error {
+func (c *client) PatchNode(ctx context.Context, node *v1.Node, changeFn func(*v1.Node)) error {
 	logger := logger.FromContext(ctx, c.log)
 	oldData, err := json.Marshal(node)
 	if err != nil {
@@ -108,7 +127,7 @@ func (c *Client) PatchNode(ctx context.Context, node *v1.Node, changeFn func(*v1
 }
 
 // PatchNodeStatus patches the status of a node.
-func (c *Client) PatchNodeStatus(ctx context.Context, name string, patch []byte) error {
+func (c *client) PatchNodeStatus(ctx context.Context, name string, patch []byte) error {
 	logger := logger.FromContext(ctx, c.log)
 
 	err := waitext.Retry(
@@ -134,7 +153,7 @@ func (c *Client) PatchNodeStatus(ctx context.Context, name string, patch []byte)
 	return nil
 }
 
-func (c *Client) CordonNode(ctx context.Context, node *v1.Node) error {
+func (c *client) CordonNode(ctx context.Context, node *v1.Node) error {
 	if node.Spec.Unschedulable {
 		return nil
 	}
@@ -149,7 +168,7 @@ func (c *Client) CordonNode(ctx context.Context, node *v1.Node) error {
 }
 
 // GetNodeByIDs retrieves a node by name and validates its ID and provider ID.
-func (c *Client) GetNodeByIDs(ctx context.Context, nodeName, nodeID, providerID string) (*v1.Node, error) {
+func (c *client) GetNodeByIDs(ctx context.Context, nodeName, nodeID, providerID string) (*v1.Node, error) {
 	if nodeID == "" && providerID == "" {
 		return nil, fmt.Errorf("node and provider IDs are empty %w", ErrAction)
 	}
@@ -178,7 +197,7 @@ func (c *Client) GetNodeByIDs(ctx context.Context, nodeName, nodeID, providerID
 // It does internal throttling to avoid spawning a goroutine-per-pod on large lists.
 // Returns two sets of pods - the ones that successfully executed the action and the ones that failed.
 // actionName might be used to distinguish what is the operation (for logs, debugging, etc.) but is optional.
-func (c *Client) ExecuteBatchPodActions(
+func (c *client) ExecuteBatchPodActions(
 	ctx context.Context,
 	pods []*v1.Pod,
 	action func(context.Context, v1.Pod) error,
@@ -250,7 +269,7 @@ func (c *Client) ExecuteBatchPodActions(
 
 // EvictPod evicts a pod from a k8s node. Error handling is based on eviction api documentation:
 // https://kubernetes.io/docs/tasks/administer-cluster/safely-drain-node/#the-eviction-api
-func (c *Client) EvictPod(ctx context.Context, pod v1.Pod, podEvictRetryDelay time.Duration, version schema.GroupVersion) error {
+func (c *client) EvictPod(ctx context.Context, pod v1.Pod, podEvictRetryDelay time.Duration, version schema.GroupVersion) error {
 	logger := logger.FromContext(ctx, c.log)
 
 	b := waitext.NewConstantBackoff(podEvictRetryDelay)
@@ -306,7 +325,7 @@ func (c *Client) EvictPod(ctx context.Context, pod v1.Pod, podEvictRetryDelay ti
 }
 
 // DeletePod deletes a pod from the cluster.
-func (c *Client) DeletePod(ctx context.Context, options metav1.DeleteOptions, pod v1.Pod, podDeleteRetries int, podDeleteRetryDelay time.Duration) error {
+func (c *client) DeletePod(ctx context.Context, options metav1.DeleteOptions, pod v1.Pod, podDeleteRetries int, podDeleteRetryDelay time.Duration) error {
 	logger := logger.FromContext(ctx, c.log)
 
 	b := waitext.NewConstantBackoff(podDeleteRetryDelay)