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97 lines
3.3 KiB
Go
97 lines
3.3 KiB
Go
/*
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Copyright 2014 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package predicates
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import (
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"fmt"
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v1 "k8s.io/api/core/v1"
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pluginhelper "k8s.io/kubernetes/pkg/scheduler/framework/plugins/helper"
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"k8s.io/kubernetes/pkg/scheduler/framework/plugins/nodeaffinity"
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"k8s.io/kubernetes/pkg/scheduler/framework/plugins/nodename"
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"k8s.io/kubernetes/pkg/scheduler/framework/plugins/nodeports"
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"k8s.io/kubernetes/pkg/scheduler/framework/plugins/noderesources"
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schedulernodeinfo "k8s.io/kubernetes/pkg/scheduler/nodeinfo"
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)
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// DEPRECATED: all the logic in this package exist only because kubelet uses it.
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// InsufficientResourceError is an error type that indicates what kind of resource limit is
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// hit and caused the unfitting failure.
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type InsufficientResourceError struct {
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noderesources.InsufficientResource
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}
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func (e *InsufficientResourceError) Error() string {
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return fmt.Sprintf("Node didn't have enough resource: %s, requested: %d, used: %d, capacity: %d",
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e.ResourceName, e.Requested, e.Used, e.Capacity)
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}
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// PredicateFailureReason interface represents the failure reason of a predicate.
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type PredicateFailureReason interface {
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GetReason() string
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}
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// GetReason returns the reason of the InsufficientResourceError.
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func (e *InsufficientResourceError) GetReason() string {
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return fmt.Sprintf("Insufficient %v", e.ResourceName)
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}
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// GetInsufficientAmount returns the amount of the insufficient resource of the error.
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func (e *InsufficientResourceError) GetInsufficientAmount() int64 {
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return e.Requested - (e.Capacity - e.Used)
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}
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// PredicateFailureError describes a failure error of predicate.
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type PredicateFailureError struct {
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PredicateName string
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PredicateDesc string
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}
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func (e *PredicateFailureError) Error() string {
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return fmt.Sprintf("Predicate %s failed", e.PredicateName)
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}
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// GetReason returns the reason of the PredicateFailureError.
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func (e *PredicateFailureError) GetReason() string {
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return e.PredicateDesc
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}
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// GeneralPredicates checks a group of predicates that the kubelet cares about.
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func GeneralPredicates(pod *v1.Pod, _ interface{}, nodeInfo *schedulernodeinfo.NodeInfo) (bool, []PredicateFailureReason, error) {
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if nodeInfo.Node() == nil {
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return false, nil, fmt.Errorf("node not found")
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}
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var reasons []PredicateFailureReason
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for _, r := range noderesources.Fits(pod, nodeInfo, nil) {
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reasons = append(reasons, &InsufficientResourceError{InsufficientResource: r})
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}
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if !pluginhelper.PodMatchesNodeSelectorAndAffinityTerms(pod, nodeInfo.Node()) {
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reasons = append(reasons, &PredicateFailureError{nodeaffinity.Name, nodeaffinity.ErrReason})
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}
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if !nodename.Fits(pod, nodeInfo) {
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reasons = append(reasons, &PredicateFailureError{nodename.Name, nodename.ErrReason})
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}
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if !nodeports.Fits(pod, nodeInfo) {
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reasons = append(reasons, &PredicateFailureError{nodeports.Name, nodeports.ErrReason})
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}
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return len(reasons) == 0, reasons, nil
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}
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