create backups from schedules using velero create backup (#1734)

* add --from-schedule to `velero backup create` to create backups from schedules

Signed-off-by: Adnan Abdulhussein <aadnan@vmware.com>

pkg/builder/backup_builder.go

@@ -73,6 +73,19 @@ func (b *BackupBuilder) ObjectMeta(opts ...ObjectMetaOpt) *BackupBuilder {
 	return b
 }
 
+// FromSchedule sets the Backup's spec and labels from the Schedule template
+func (b *BackupBuilder) FromSchedule(schedule *velerov1api.Schedule) *BackupBuilder {
+	labels := schedule.Labels
+	if labels == nil {
+		labels = make(map[string]string)
+	}
+	labels[velerov1api.ScheduleNameLabel] = schedule.Name
+
+	b.object.Spec = schedule.Spec.Template
+	b.ObjectMeta(WithLabelsMap(labels))
+	return b
+}
+
 // IncludedNamespaces sets the Backup's included namespaces.
 func (b *BackupBuilder) IncludedNamespaces(namespaces ...string) *BackupBuilder {
 	b.object.Spec.IncludedNamespaces = namespaces
@@ -151,12 +164,6 @@ func (b *BackupBuilder) StartTimestamp(val time.Time) *BackupBuilder {
 	return b
 }
 
-// NoTypeMeta removes the type meta from the Backup.
-func (b *BackupBuilder) NoTypeMeta() *BackupBuilder {
-	b.object.TypeMeta = metav1.TypeMeta{}
-	return b
-}
-
 // Hooks sets the Backup's hooks.
 func (b *BackupBuilder) Hooks(hooks velerov1api.BackupHooks) *BackupBuilder {
 	b.object.Spec.Hooks = hooks

pkg/builder/object_meta.go

@@ -42,6 +42,24 @@ func WithLabels(vals ...string) func(obj metav1.Object) {
 	}
 }
 
+// WithLabelsMap is a functional option that applies the specified labels map to
+// an object.
+func WithLabelsMap(labels map[string]string) func(obj metav1.Object) {
+	return func(obj metav1.Object) {
+		objLabels := obj.GetLabels()
+		if objLabels == nil {
+			objLabels = make(map[string]string)
+		}
+
+		// If the label already exists in the object, it will be overwritten
+		for k, v := range labels {
+			objLabels[k] = v
+		}
+
+		obj.SetLabels(objLabels)
+	}
+}
+
 // WithAnnotations is a functional option that applies the specified
 // annotation keys/values to an object.
 func WithAnnotations(vals ...string) func(obj metav1.Object) {
@@ -66,6 +84,7 @@ func setMapEntries(m map[string]string, vals ...string) map[string]string {
 		key := vals[i]
 		val := vals[i+1]
 
+		// If the label already exists in the object, it will be overwritten
 		m[key] = val
 	}