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predicate.go
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predicate.go
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// Copyright (c) 2019 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// 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 worker
import (
machinev1alpha1 "github.com/gardener/machine-controller-manager/pkg/apis/machine/v1alpha1"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/event"
"sigs.k8s.io/controller-runtime/pkg/predicate"
)
// MachineStatusHasChanged is a predicate deciding whether the status of a Machine has been changed.
func MachineStatusHasChanged() predicate.Predicate {
statusHasChanged := func(oldObj client.Object, newObj client.Object) bool {
oldMachine, ok := oldObj.(*machinev1alpha1.Machine)
if !ok {
return false
}
newMachine, ok := newObj.(*machinev1alpha1.Machine)
if !ok {
return false
}
return oldMachine.Spec.ProviderID != newMachine.Spec.ProviderID ||
oldMachine.Status.Node != newMachine.Status.Node
}
return predicate.Funcs{
CreateFunc: func(event event.CreateEvent) bool {
return true
},
UpdateFunc: func(event event.UpdateEvent) bool {
return statusHasChanged(event.ObjectOld, event.ObjectNew)
},
GenericFunc: func(event event.GenericEvent) bool {
return false
},
DeleteFunc: func(event event.DeleteEvent) bool {
return true
},
}
}