mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
synced 2025-11-03 19:58:17 +00:00
44 lines
1.9 KiB
Go
44 lines
1.9 KiB
Go
/*
|
|
Copyright 2014 The Kubernetes Authors All rights reserved.
|
|
|
|
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 client
|
|
|
|
import (
|
|
"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
|
|
"github.com/GoogleCloudPlatform/kubernetes/pkg/util/wait"
|
|
)
|
|
|
|
// ControllerHasDesiredReplicas returns a condition that will be true iff the desired replica count
|
|
// for a controller's ReplicaSelector equals the Replicas count.
|
|
func ControllerHasDesiredReplicas(c Interface, controller *api.ReplicationController) wait.ConditionFunc {
|
|
|
|
// If we're given a controller where the status lags the spec, it either means that the controller is stale,
|
|
// or that the rc manager hasn't noticed the update yet. Polling status.Replicas is not safe in the latter case.
|
|
desiredGeneration := controller.Generation
|
|
|
|
return func() (bool, error) {
|
|
ctrl, err := c.ReplicationControllers(controller.Namespace).Get(controller.Name)
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
// There's a chance a concurrent update modifies the Spec.Replicas causing this check to pass,
|
|
// or, after this check has passed, a modification causes the rc manager to create more pods.
|
|
// This will not be an issue once we've implemented graceful delete for rcs, but till then
|
|
// concurrent stop operations on the same rc might have unintended side effects.
|
|
return ctrl.Status.ObservedGeneration >= desiredGeneration && ctrl.Status.Replicas == ctrl.Spec.Replicas, nil
|
|
}
|
|
}
|