Initial commit for the operator

shared/k8s.go

@@ -0,0 +1,142 @@
+package shared
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	appsv1 "k8s.io/api/apps/v1"
+	batchv1 "k8s.io/api/batch/v1"
+	corev1 "k8s.io/api/core/v1"
+	raczylocomv1 "raczylo.com/kubernetes-images-sync-operator/api/raczylo.com/v1"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+	"sigs.k8s.io/controller-runtime/pkg/manager"
+)
+
+type K8sResource interface {
+	GetPodSpec() *corev1.PodSpec
+}
+
+// Wrapper types
+type DeploymentWrapper appsv1.Deployment
+type JobWrapper batchv1.Job
+type DaemonSetWrapper appsv1.DaemonSet
+type CronJobWrapper batchv1.CronJob
+
+// Implement the K8sResource interface for wrapper types
+func (d *DeploymentWrapper) GetPodSpec() *corev1.PodSpec { return &d.Spec.Template.Spec }
+func (j *JobWrapper) GetPodSpec() *corev1.PodSpec        { return &j.Spec.Template.Spec }
+func (ds *DaemonSetWrapper) GetPodSpec() *corev1.PodSpec { return &ds.Spec.Template.Spec }
+func (cj *CronJobWrapper) GetPodSpec() *corev1.PodSpec {
+	return &cj.Spec.JobTemplate.Spec.Template.Spec
+}
+
+func processContainerName(containerName string) (Container, error) {
+	cnt := Container{}
+	parts := strings.Split(containerName, "@")
+	if len(parts) > 2 {
+		return cnt, fmt.Errorf("invalid container name format: %s", containerName)
+	}
+	imageAndTag := strings.Split(parts[0], ":")
+	cnt.Image = imageAndTag[0]
+	if len(imageAndTag) > 2 {
+		return cnt, fmt.Errorf("invalid image:tag format: %s", parts[0])
+	}
+	if len(imageAndTag) == 2 {
+		cnt.Tag = imageAndTag[1]
+	}
+	if len(parts) == 2 {
+		shaParts := strings.SplitN(parts[1], ":", 2)
+		if len(shaParts) != 2 || (shaParts[0] != "sha" && shaParts[0] != "sha256") {
+			return cnt, fmt.Errorf("invalid SHA format: %s", parts[1])
+		}
+		cnt.Sha = parts[1]
+	}
+	cnt.FullName = containerName
+	// if tag is empty and sha is empty - use tag 'latest'
+	if cnt.Sha == "" && cnt.Tag == "" {
+		cnt.Tag = "latest"
+	}
+
+	if cnt.Image == "" {
+		return cnt, fmt.Errorf("image name is required")
+	}
+	return cnt, nil
+}
+
+func processContainers[T K8sResource](resource T, containersList *ContainersList) error {
+	podSpec := resource.GetPodSpec()
+	if podSpec == nil {
+		return fmt.Errorf("nil PodSpec")
+	}
+
+	allContainers := append(podSpec.Containers, podSpec.InitContainers...)
+	for _, container := range allContainers {
+		if err := processContainer(container.Image, containersList); err != nil {
+			return err
+		}
+	}
+
+	for _, container := range podSpec.EphemeralContainers {
+		if err := processContainer(container.EphemeralContainerCommon.Image, containersList); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+// processContainer handles the processing of a single container image
+func processContainer(image string, containersList *ContainersList) error {
+	cnt, err := processContainerName(image)
+	if err != nil {
+		return fmt.Errorf("failed to process container name: %s - %w", image, err)
+	}
+	containersList.Containers = append(containersList.Containers, cnt)
+	return nil
+}
+
+// listAndProcessResources is a generic function to list and process K8s resources
+func ListAndProcessResources[T K8sResource, L client.ObjectList](ctx context.Context, r client.Client, list L, containersList *ContainersList) error {
+	if err := r.List(ctx, list, &client.ListOptions{}); err != nil {
+		return fmt.Errorf("failed to list resources: %w", err)
+	}
+
+	switch typedList := any(list).(type) {
+	case *appsv1.DeploymentList:
+		for i := range typedList.Items {
+			if err := processContainers((*DeploymentWrapper)(&typedList.Items[i]), containersList); err != nil {
+				return err
+			}
+		}
+	case *batchv1.JobList:
+		for i := range typedList.Items {
+			if err := processContainers((*JobWrapper)(&typedList.Items[i]), containersList); err != nil {
+				return err
+			}
+		}
+	case *appsv1.DaemonSetList:
+		for i := range typedList.Items {
+			if err := processContainers((*DaemonSetWrapper)(&typedList.Items[i]), containersList); err != nil {
+				return err
+			}
+		}
+	case *batchv1.CronJobList:
+		for i := range typedList.Items {
+			if err := processContainers((*CronJobWrapper)(&typedList.Items[i]), containersList); err != nil {
+				return err
+			}
+		}
+	default:
+		return fmt.Errorf("unsupported list type: %T", list)
+	}
+
+	return nil
+}
+
+func SetupIndexers(mgr manager.Manager) error {
+	return mgr.GetFieldIndexer().IndexField(context.Background(), &raczylocomv1.ClusterImage{}, "spec.exportName", func(rawObj client.Object) []string {
+		clusterImage := rawObj.(*raczylocomv1.ClusterImage)
+		return []string{clusterImage.Spec.ExportName}
+	})
+}