81 lines
2.8 KiB
Go
81 lines
2.8 KiB
Go
/*
|
|
Copyright 2019 The Kubernetes Authors.
|
|
|
|
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 nodeunschedulable
|
|
|
|
import (
|
|
"context"
|
|
|
|
v1 "k8s.io/api/core/v1"
|
|
"k8s.io/apimachinery/pkg/runtime"
|
|
v1helper "k8s.io/component-helpers/scheduling/corev1"
|
|
"k8s.io/kubernetes/pkg/scheduler/framework"
|
|
"k8s.io/kubernetes/pkg/scheduler/framework/plugins/names"
|
|
)
|
|
|
|
// NodeUnschedulable plugin filters nodes that set node.Spec.Unschedulable=true unless
|
|
// the pod tolerates {key=node.kubernetes.io/unschedulable, effect:NoSchedule} taint.
|
|
type NodeUnschedulable struct {
|
|
}
|
|
|
|
var _ framework.FilterPlugin = &NodeUnschedulable{}
|
|
var _ framework.EnqueueExtensions = &NodeUnschedulable{}
|
|
|
|
// Name is the name of the plugin used in the plugin registry and configurations.
|
|
const Name = names.NodeUnschedulable
|
|
|
|
const (
|
|
// ErrReasonUnknownCondition is used for NodeUnknownCondition predicate error.
|
|
ErrReasonUnknownCondition = "node(s) had unknown conditions"
|
|
// ErrReasonUnschedulable is used for NodeUnschedulable predicate error.
|
|
ErrReasonUnschedulable = "node(s) were unschedulable"
|
|
)
|
|
|
|
// EventsToRegister returns the possible events that may make a Pod
|
|
// failed by this plugin schedulable.
|
|
func (pl *NodeUnschedulable) EventsToRegister() []framework.ClusterEvent {
|
|
return []framework.ClusterEvent{
|
|
{Resource: framework.Node, ActionType: framework.Add | framework.UpdateNodeTaint},
|
|
}
|
|
}
|
|
|
|
// Name returns name of the plugin. It is used in logs, etc.
|
|
func (pl *NodeUnschedulable) Name() string {
|
|
return Name
|
|
}
|
|
|
|
// Filter invoked at the filter extension point.
|
|
func (pl *NodeUnschedulable) Filter(ctx context.Context, _ *framework.CycleState, pod *v1.Pod, nodeInfo *framework.NodeInfo) *framework.Status {
|
|
node := nodeInfo.Node()
|
|
if node == nil {
|
|
return framework.NewStatus(framework.UnschedulableAndUnresolvable, ErrReasonUnknownCondition)
|
|
}
|
|
// If pod tolerate unschedulable taint, it's also tolerate `node.Spec.Unschedulable`.
|
|
podToleratesUnschedulable := v1helper.TolerationsTolerateTaint(pod.Spec.Tolerations, &v1.Taint{
|
|
Key: v1.TaintNodeUnschedulable,
|
|
Effect: v1.TaintEffectNoSchedule,
|
|
})
|
|
if node.Spec.Unschedulable && !podToleratesUnschedulable {
|
|
return framework.NewStatus(framework.UnschedulableAndUnresolvable, ErrReasonUnschedulable)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// New initializes a new plugin and returns it.
|
|
func New(_ runtime.Object, _ framework.Handle) (framework.Plugin, error) {
|
|
return &NodeUnschedulable{}, nil
|
|
}
|