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storagedownloadurl_controller.go
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/
storagedownloadurl_controller.go
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/*
Copyright 2023.
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 proxmox
import (
"context"
"fmt"
"reflect"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/api/meta"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller"
"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
"sigs.k8s.io/controller-runtime/pkg/event"
"sigs.k8s.io/controller-runtime/pkg/log"
"sigs.k8s.io/controller-runtime/pkg/predicate"
proxmoxv1alpha1 "github.com/alperencelik/kubemox/api/proxmox/v1alpha1"
"github.com/alperencelik/kubemox/pkg/proxmox"
)
// StorageDownloadURLReconciler reconciles a StorageDownloadURL object
type StorageDownloadURLReconciler struct {
client.Client
Scheme *runtime.Scheme
}
const (
storageDownloadURLFinalizerName = "storagedownloadurl.proxmox.alperen.cloud/finalizer"
// Controller settings
SDUreconcilationPeriod = 10
SDUmaxConcurrentReconciles = 3
storageDownloadURLTimesNum = 5
storageDownloadURLSteps = 12
// Status conditions
typeAvailableStorageDownloadURL = "Available"
typeCreatingStorageDownloadURL = "Creating"
typeDeletingStorageDownloadURL = "Deleting"
typeErrorStorageDownloadURL = "Error"
)
//+kubebuilder:rbac:groups=proxmox.alperen.cloud,resources=storagedownloadurls,verbs=get;list;watch;create;update;patch;delete
//+kubebuilder:rbac:groups=proxmox.alperen.cloud,resources=storagedownloadurls/status,verbs=get;update;patch
//+kubebuilder:rbac:groups=proxmox.alperen.cloud,resources=storagedownloadurls/finalizers,verbs=update
// Reconcile is part of the main kubernetes reconciliation loop which aims to
// move the current state of the cluster closer to the desired state.
// TODO(user): Modify the Reconcile function to compare the state specified by
// the StorageDownloadURL object against the actual cluster state, and then
// perform operations to make the cluster state reflect the state specified by
// the user.
//
// For more details, check Reconcile and its Result here:
// - https://pkg.go.dev/sigs.k8s.io/controller-runtime@v0.16.3/pkg/reconcile
func (r *StorageDownloadURLReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
logger := log.FromContext(ctx)
// Fetch the StorageDownloadURL resource
storageDownloadURL := &proxmoxv1alpha1.StorageDownloadURL{}
err := r.Get(ctx, req.NamespacedName, storageDownloadURL)
if err != nil {
return ctrl.Result{}, r.handleResourceNotFound(ctx, err)
}
logger.Info(fmt.Sprintf("Reconciling StorageDownloadURL %s", storageDownloadURL.Name))
// Get fields from the spec
node := storageDownloadURL.Spec.Node
storage := storageDownloadURL.Spec.Storage
if storageDownloadURL.ObjectMeta.DeletionTimestamp.IsZero() {
if !controllerutil.ContainsFinalizer(storageDownloadURL, storageDownloadURLFinalizerName) {
controllerutil.AddFinalizer(storageDownloadURL, storageDownloadURLFinalizerName)
if err = r.Update(ctx, storageDownloadURL); err != nil {
logger.Error(err, "unable to update StorageDownloadURL")
return ctrl.Result{}, client.IgnoreNotFound(err)
}
}
} else {
if controllerutil.ContainsFinalizer(storageDownloadURL, storageDownloadURLFinalizerName) {
if !meta.IsStatusConditionPresentAndEqual(storageDownloadURL.Status.Conditions, typeDeletingStorageDownloadURL, metav1.ConditionTrue) {
meta.SetStatusCondition(&storageDownloadURL.Status.Conditions, metav1.Condition{
Type: typeDeletingStorageDownloadURL,
Status: metav1.ConditionTrue,
Reason: "Deleting",
Message: "Deleting StorageDownloadURL",
})
if err = r.Status().Update(ctx, storageDownloadURL); err != nil {
logger.Error(err, "unable to update StorageDownloadURL status")
return ctrl.Result{Requeue: true}, client.IgnoreNotFound(err)
}
}
}
// Delete the file from the storage
err = proxmox.DeleteStorageContent(storage, &storageDownloadURL.Spec)
if err != nil {
logger.Error(err, "unable to delete the file")
return ctrl.Result{}, client.IgnoreNotFound(err)
}
controllerutil.RemoveFinalizer(storageDownloadURL, storageDownloadURLFinalizerName)
if err = r.Update(ctx, storageDownloadURL); err != nil {
logger.Error(err, "unable to update StorageDownloadURL")
return ctrl.Result{}, client.IgnoreNotFound(err)
}
// Stop reconciliation as the object is being deleted
return ctrl.Result{}, nil
}
// Check if the filename exists in the storage
storageContent, err := proxmox.GetStorageContent(node, storage)
if err != nil {
logger.Error(err, "unable to get storage content")
return ctrl.Result{}, err
}
// Check if the filename exists in the storage
if !proxmox.HasFile(storageContent, &storageDownloadURL.Spec) {
logger.Info("File does not exist in the storage, so downloading it")
err = r.handleDownloadURL(ctx, storageDownloadURL)
if err != nil {
logger.Error(err, "unable to download the file")
return ctrl.Result{}, err
}
} else {
logger.Info("File exists in the storage")
}
return ctrl.Result{}, nil
}
// SetupWithManager sets up the controller with the Manager.
func (r *StorageDownloadURLReconciler) SetupWithManager(mgr ctrl.Manager) error {
return ctrl.NewControllerManagedBy(mgr).
For(&proxmoxv1alpha1.StorageDownloadURL{}).
WithEventFilter(predicate.Funcs{
UpdateFunc: func(e event.UpdateEvent) bool {
oldStorageDownloadURL := e.ObjectOld.(*proxmoxv1alpha1.StorageDownloadURL)
newStorageDownloadURL := e.ObjectNew.(*proxmoxv1alpha1.StorageDownloadURL)
condition1 := !reflect.DeepEqual(oldStorageDownloadURL.Spec, newStorageDownloadURL.Spec)
condition2 := newStorageDownloadURL.ObjectMeta.GetDeletionTimestamp().IsZero()
return condition1 || !condition2
},
}).
Owns(&proxmoxv1alpha1.StorageDownloadURL{}).
WithOptions(controller.Options{MaxConcurrentReconciles: SDUmaxConcurrentReconciles}).
Complete(r)
}
func (r *StorageDownloadURLReconciler) handleResourceNotFound(ctx context.Context, err error) error {
logger := log.FromContext(ctx)
if errors.IsNotFound(err) {
logger.Info("StorageDownloadURL resource not found. Ignoring since object must be deleted")
return nil
}
logger.Error(err, "Failed to get StorageDownloadURL")
return err
}
func (r *StorageDownloadURLReconciler) handleDownloadURL(ctx context.Context,
storageDownloadURL *proxmoxv1alpha1.StorageDownloadURL) error {
// Download the file
logger := log.FromContext(ctx)
taskUPID, taskErr := proxmox.StorageDownloadURL(storageDownloadURL.Spec.Node, &storageDownloadURL.Spec)
if taskErr != nil {
logger.Error(taskErr, "unable to download the file")
return taskErr
}
// Get the task
task := proxmox.GetTask(taskUPID)
var logChannel <-chan string
logChannel, err := task.Watch(ctx, 5)
if err != nil {
logger.Error(err, "unable to watch the task")
return err
}
for logEntry := range logChannel {
logger.Info(fmt.Sprintf("Download task for %s: %s", storageDownloadURL.Spec.Filename, logEntry))
}
_, taskCompleted, taskErr := task.WaitForCompleteStatus(ctx, storageDownloadURLTimesNum, storageDownloadURLSteps)
if taskErr != nil {
logger.Error(taskErr, "unable to get the task status")
return taskErr
}
switch {
case !taskCompleted:
logger.Error(taskErr, "Download task did not complete")
case taskCompleted:
logger.Info("Download task completed")
default:
logger.Info("Download task did not complete yet")
}
return nil
}