feat: add check if knuu was initialized

pkg/k8s/k8s.go

@@ -48,6 +48,11 @@ func Initialize() error {
 	return nil
 }
 
+// IsInitialized checks if the Kubernetes clientset has been initialized.
+func IsInitialized() bool {
+	return clientset != nil
+}
+
 // Namespace returns the current namespace in use.
 func Namespace() string {
 	return namespace

pkg/k8s/k8s_pod.go

@@ -1,22 +1,22 @@
 package k8s
 
 import (
-	"bytes"
-	"context"
-	"fmt"
-	"io"
-	"k8s.io/client-go/tools/portforward"
-	"k8s.io/client-go/transport/spdy"
-	"net/http"
-	"k8s.io/apimachinery/pkg/api/resource"
-	"strings"
-	"time"
-
-	"github.com/sirupsen/logrus"
-	v1 "k8s.io/api/core/v1"
-	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
-	"k8s.io/client-go/kubernetes/scheme"
-	"k8s.io/client-go/tools/remotecommand"
+    "bytes"
+    "context"
+    "fmt"
+    "io"
+    "k8s.io/apimachinery/pkg/api/resource"
+    "k8s.io/client-go/tools/portforward"
+    "k8s.io/client-go/transport/spdy"
+    "net/http"
+    "strings"
+    "time"
+
+    "github.com/sirupsen/logrus"
+    v1 "k8s.io/api/core/v1"
+    metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+    "k8s.io/client-go/kubernetes/scheme"
+    "k8s.io/client-go/tools/remotecommand"
 )
 
 // getPod retrieves a pod from the given namespace and logs any errors.
@@ -25,6 +25,9 @@ func getPod(namespace, name string) (*v1.Pod, error) {
 	ctx, cancel := context.WithTimeout(context.Background(), 20*time.Second)
 	defer cancel()
 
+	if !IsInitialized() {
+		return nil, fmt.Errorf("knuu is not initialized")
+	}
 	pod, err := Clientset().CoreV1().Pods(namespace).Get(ctx, name, metav1.GetOptions{})
 	if err != nil {
 		return nil, fmt.Errorf("failed to get pod %s: %w", name, err)
@@ -45,6 +48,9 @@ func DeployPod(podConfig PodConfig, init bool) (*v1.Pod, error) {
 	defer cancel()
 
 	// Try to create the pod
+	if !IsInitialized() {
+		return nil, fmt.Errorf("knuu is not initialized")
+	}
 	createdPod, err := Clientset().CoreV1().Pods(podConfig.Namespace).Create(ctx, pod, metav1.CreateOptions{})
 	if err != nil {
 		return nil, fmt.Errorf("failed to create pod: %v", err)
@@ -126,6 +132,9 @@ func RunCommandInPod(namespace, podName, containerName string, cmd []string) (st
 	}
 
 	// Construct the request for executing the command in the specified container
+	if !IsInitialized() {
+		return "", fmt.Errorf("knuu is not initialized")
+	}
 	req := Clientset().CoreV1().RESTClient().Post().
 		Resource("pods").
 		Name(podName).
@@ -185,6 +194,9 @@ func DeletePod(namespace, name string) error {
 	defer cancel()
 
 	// Delete the pod using the Kubernetes client API
+	if !IsInitialized() {
+		return fmt.Errorf("knuu is not initialized")
+	}
 	if err := Clientset().CoreV1().Pods(namespace).Delete(ctx, name, metav1.DeleteOptions{}); err != nil {
 		return fmt.Errorf("failed to delete pod %s: %v", name, err)
 	}
@@ -408,6 +420,9 @@ func PortForwardPod(namespace string, podName string, localPort int, remotePort
 	}
 
 	// Setup the port forwarding
+	if !IsInitialized() {
+		return fmt.Errorf("knuu is not initialized")
+	}
 	url := Clientset().CoreV1().RESTClient().Post().
 		Resource("pods").
 		Namespace(namespace).

pkg/k8s/k8s_pvc.go

@@ -1,14 +1,14 @@
 package k8s
 
 import (
-	"context"
-	"fmt"
-	"time"
+    "context"
+    "fmt"
+    "time"
 
-	"github.com/sirupsen/logrus"
-	v1 "k8s.io/api/core/v1"
-	"k8s.io/apimachinery/pkg/api/resource"
-	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+    "github.com/sirupsen/logrus"
+    v1 "k8s.io/api/core/v1"
+    "k8s.io/apimachinery/pkg/api/resource"
+    metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 )
 
 // createPersistentVolumeClaim deploys a PersistentVolumeClaim if it does not exist.
@@ -32,6 +32,9 @@ func createPersistentVolumeClaim(namespace, name string, labels map[string]strin
 	ctx, cancel := context.WithTimeout(context.Background(), 20*time.Second)
 	defer cancel()
 
+	if !IsInitialized() {
+		return fmt.Errorf("knuu is not initialized")
+	}
 	if _, err := Clientset().CoreV1().PersistentVolumeClaims(namespace).Create(ctx, pvc, metav1.CreateOptions{}); err != nil {
 		return err
 	}
@@ -52,6 +55,9 @@ func deletePersistentVolumeClaim(namespace, name string) error {
 	ctx, cancel := context.WithTimeout(context.Background(), 20*time.Second)
 	defer cancel()
 
+	if !IsInitialized() {
+		return fmt.Errorf("knuu is not initialized")
+	}
 	if err := Clientset().CoreV1().PersistentVolumeClaims(namespace).Delete(ctx, name, metav1.DeleteOptions{}); err != nil {
 		return fmt.Errorf("error deleting PersistentVolumeClaim %s: %w", name, err)
 	}
@@ -66,6 +72,9 @@ func getPersistentVolumeClaim(namespace, name string) (*v1.PersistentVolumeClaim
 	ctx, cancel := context.WithTimeout(context.Background(), 20*time.Second)
 	defer cancel()
 
+	if !IsInitialized() {
+		return nil, fmt.Errorf("knuu is not initialized")
+	}
 	pv, err := Clientset().CoreV1().PersistentVolumeClaims(namespace).Get(ctx, name, metav1.GetOptions{})
 	if err != nil {
 		return nil, err

pkg/k8s/k8s_service.go

@@ -1,22 +1,25 @@
 package k8s
 
 import (
-	"context"
-	"errors"
-	"fmt"
-	"github.com/sirupsen/logrus"
-	"time"
-
-	v1 "k8s.io/api/core/v1"
-	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
-	"k8s.io/apimachinery/pkg/util/intstr"
+    "context"
+    "errors"
+    "fmt"
+    "github.com/sirupsen/logrus"
+    "time"
+
+    v1 "k8s.io/api/core/v1"
+    metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+    "k8s.io/apimachinery/pkg/util/intstr"
 )
 
 // GetService retrieves a service.
 func GetService(namespace, name string) (*v1.Service, error) {
 	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
 	defer cancel()
 
+	if !IsInitialized() {
+		return nil, fmt.Errorf("knuu is not initialized")
+	}
 	svc, err := Clientset().CoreV1().Services(namespace).Get(ctx, name, metav1.GetOptions{})
 	if err != nil {
 		return nil, fmt.Errorf("error getting service %s: %w", name, err)
@@ -35,6 +38,9 @@ func DeployService(namespace, name string, labels, selectorMap map[string]string
 	ctx, cancel := context.WithTimeout(context.Background(), 20*time.Second)
 	defer cancel()
 
+	if !IsInitialized() {
+		return nil, fmt.Errorf("knuu is not initialized")
+	}
 	serv, err := Clientset().CoreV1().Services(namespace).Create(ctx, svc, metav1.CreateOptions{})
 	if err != nil {
 		return nil, fmt.Errorf("error creating service %s: %w", name, err)
@@ -54,6 +60,9 @@ func PatchService(namespace, name string, labels, selectorMap map[string]string,
 	ctx, cancel := context.WithTimeout(context.Background(), 20*time.Second)
 	defer cancel()
 
+	if !IsInitialized() {
+		return fmt.Errorf("knuu is not initialized")
+	}
 	_, err = Clientset().CoreV1().Services(namespace).Update(ctx, svc, metav1.UpdateOptions{})
 	if err != nil {
 		return fmt.Errorf("error patching service %s: %w", name, err)
@@ -73,6 +82,9 @@ func DeleteService(namespace, name string) error {
 		return fmt.Errorf("error getting service %s: %w", name, err)
 	}
 
+	if !IsInitialized() {
+		return fmt.Errorf("knuu is not initialized")
+	}
 	err = Clientset().CoreV1().Services(namespace).Delete(ctx, name, metav1.DeleteOptions{})
 	if err != nil {
 		return fmt.Errorf("error deleting service %s: %w", name, err)

pkg/knuu/knuu.go

@@ -29,6 +29,9 @@ func Identifier() string {
 
 // InitializeWithIdentifier initializes knuu with a unique identifier
 func InitializeWithIdentifier(uniqueIdentifier string) error {
+	if uniqueIdentifier == "" {
+		return fmt.Errorf("cannot initialize knuu with empty identifier")
+	}
 	identifier = uniqueIdentifier
 
 	t := time.Now()
@@ -54,3 +57,8 @@ func InitializeWithIdentifier(uniqueIdentifier string) error {
 
 	return nil
 }
+
+// IsInitialized returns true if knuu is initialized, and false otherwise
+func IsInitialized() bool {
+	return k8s.IsInitialized()
+}