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virtualmachinesnapshotpolicy_controller.go
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/
virtualmachinesnapshotpolicy_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"
"time"
"github.com/robfig/cron/v3"
"k8s.io/apimachinery/pkg/api/errors"
"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/log"
"sigs.k8s.io/controller-runtime/pkg/predicate"
proxmoxv1alpha1 "github.com/alperencelik/kubemox/api/proxmox/v1alpha1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
// VirtualMachineSnapshotPolicyReconciler reconciles a VirtualMachineSnapshotPolicy object
type VirtualMachineSnapshotPolicyReconciler struct {
client.Client
Scheme *runtime.Scheme
}
const (
// Controller settings
VMSnapshotPolicyreconcilationPeriod = 10
VMSnapshotPolicymaxConcurrentReconciles = 3
)
//+kubebuilder:rbac:groups=proxmox.alperen.cloud,resources=virtualmachinesnapshotpolicies,verbs=get;list;watch;create;update;patch;delete
//+kubebuilder:rbac:groups=proxmox.alperen.cloud,resources=virtualmachinesnapshotpolicies/status,verbs=get;update;patch
//+kubebuilder:rbac:groups=proxmox.alperen.cloud,resources=virtualmachinesnapshotpolicies/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 VirtualMachineSnapshotPolicy 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@v0.15.0/pkg/reconcile
func (r *VirtualMachineSnapshotPolicyReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
logger := log.FromContext(ctx)
// TODO(user): your logic here
vmSnapshotPolicy := &proxmoxv1alpha1.VirtualMachineSnapshotPolicy{}
err := r.Get(ctx, req.NamespacedName, vmSnapshotPolicy)
if err != nil {
return ctrl.Result{}, r.handleResourceNotFound(ctx, err)
}
// TODO: Add deletion logic for snapshots
// Start snapshot cron jobs
if err := r.StartSnapshotCronJobs(ctx, vmSnapshotPolicy); err != nil {
logger.Error(err, "unable to start snapshot cron jobs")
return ctrl.Result{}, err
}
return ctrl.Result{}, nil
}
// SetupWithManager sets up the controller with the Manager.
func (r *VirtualMachineSnapshotPolicyReconciler) SetupWithManager(mgr ctrl.Manager) error {
return ctrl.NewControllerManagedBy(mgr).
For(&proxmoxv1alpha1.VirtualMachineSnapshotPolicy{}).
WithEventFilter(predicate.GenerationChangedPredicate{}).
WithOptions(controller.Options{MaxConcurrentReconciles: VMSnapshotPolicymaxConcurrentReconciles}).
Complete(r)
}
func GetMatchingVirtualMachines(vmSnapshotPolicy *proxmoxv1alpha1.VirtualMachineSnapshotPolicy,
r *VirtualMachineSnapshotPolicyReconciler, ctx context.Context) []proxmoxv1alpha1.VirtualMachine {
matchingNamepaces := vmSnapshotPolicy.Spec.NamespaceSelector
matchingLabels := vmSnapshotPolicy.Spec.LabelSelector.MatchLabels
// Find matching VirtualMachines on matching namespaces
var MatchingVirtualMachines []proxmoxv1alpha1.VirtualMachine
for _, namespace := range matchingNamepaces.Namespaces {
// Append to vmList
virtualMachineList := &proxmoxv1alpha1.VirtualMachineList{}
if err := r.List(ctx, virtualMachineList, client.InNamespace(namespace), client.MatchingLabels(matchingLabels)); err != nil {
log.Log.Error(err, "unable to list VirtualMachines")
}
MatchingVirtualMachines = append(MatchingVirtualMachines, virtualMachineList.Items...)
}
return MatchingVirtualMachines
}
func VMSnapshotCR(vmName, snapshotName, namespace string) *proxmoxv1alpha1.VirtualMachineSnapshot {
return &proxmoxv1alpha1.VirtualMachineSnapshot{
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf("%s-%s", vmName, time.Now().Format("2006-01-2t15-040-5z07-00")),
Namespace: namespace,
},
Spec: proxmoxv1alpha1.VirtualMachineSnapshotSpec{
VirtualMachineName: vmName,
SnapshotName: snapshotName,
},
}
}
func (r *VirtualMachineSnapshotPolicyReconciler) StartSnapshotCronJobs(ctx context.Context,
vmSnapshotPolicy *proxmoxv1alpha1.VirtualMachineSnapshotPolicy) error {
logger := log.FromContext(ctx)
cronSpec := vmSnapshotPolicy.Spec.SnapshotSchedule
// Get matching VirtualMachines
MatchingVirtualMachines := GetMatchingVirtualMachines(vmSnapshotPolicy, r, ctx)
// Iterate over matching VirtualMachines to create snapshot
c := cron.New()
if _, err := c.AddFunc(cronSpec, func() {
for i := range MatchingVirtualMachines {
vm := &MatchingVirtualMachines[i]
// Create snapshot
vmName := vm.Spec.Name
snapshotName := fmt.Sprintf("snapshot_%s", time.Now().Format("2006_01_02T15_04_05"))
namespace := vm.Namespace
// Create VirtualMachineSnapshot object
vmSnapshot := VMSnapshotCR(vmName, snapshotName, namespace)
// Get VirtualMachineSnapshot object and if it does not exist, create it
// If it exists, do nothing
foundvmSnapshot := &proxmoxv1alpha1.VirtualMachineSnapshot{}
err := r.Get(ctx, client.ObjectKey{Namespace: namespace, Name: vmSnapshot.Name}, foundvmSnapshot)
if err != nil {
if errors.IsNotFound(err) {
// Create the VirtualMachineSnapshot
logger.Info("Creating a new VirtualMachineSnapshot", "VirtualMachineSnapshot.Namespace",
vmSnapshot.Namespace, "VirtualMachineSnapshot.Name", vmSnapshot.Name)
if err := r.Create(ctx, vmSnapshot); err != nil {
logger.Error(err, "unable to create VirtualMachineSnapshot")
return
}
}
}
}
}); err != nil {
log.Log.Error(err, "unable to add cronjob")
return err
}
c.Start()
return nil
}
func (r *VirtualMachineSnapshotPolicyReconciler) handleResourceNotFound(ctx context.Context, err error) error {
logger := log.FromContext(ctx)
if errors.IsNotFound(err) {
logger.Info("VirtualMachineSnapshotPolicy resource not found. Ignoring since object must be deleted")
return nil
}
logger.Error(err, "Failed to get VirtualMachineSnapshotPolicy")
return err
}