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util.go
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util.go
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// Copyright 2019 The Kubeflow 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 common
import (
"fmt"
"sort"
"strings"
apiv1 "github.com/kubeflow/common/pkg/apis/common/v1"
log "github.com/sirupsen/logrus"
v1 "k8s.io/api/core/v1"
"k8s.io/api/scheduling/v1beta1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
// ReplicasPriority is a slice of ReplicaPriority.
type ReplicasPriority []ReplicaPriority
type ReplicaPriority struct {
priority int32
apiv1.ReplicaSpec
}
func (p ReplicasPriority) Len() int {
return len(p)
}
func (p ReplicasPriority) Less(i, j int) bool {
return p[i].priority > p[j].priority
}
func (p ReplicasPriority) Swap(i, j int) {
p[i], p[j] = p[j], p[i]
}
func GenGeneralName(jobName string, rtype string, index string) string {
n := jobName + "-" + strings.ToLower(rtype) + "-" + index
return strings.Replace(n, "/", "-", -1)
}
// RecheckDeletionTimestamp returns a CanAdopt() function to recheck deletion.
//
// The CanAdopt() function calls getObject() to fetch the latest value,
// and denies adoption attempts if that object has a non-nil DeletionTimestamp.
func RecheckDeletionTimestamp(getObject func() (metav1.Object, error)) func() error {
return func() error {
obj, err := getObject()
if err != nil {
return fmt.Errorf("can't recheck DeletionTimestamp: %v", err)
}
if obj.GetDeletionTimestamp() != nil {
return fmt.Errorf("%v/%v has just been deleted at %v", obj.GetNamespace(), obj.GetName(), obj.GetDeletionTimestamp())
}
return nil
}
}
func MaxInt(x, y int) int {
if x < y {
return y
}
return x
}
func AddResourceList(list, req, limit v1.ResourceList) {
for name, quantity := range req {
if value, ok := list[name]; !ok {
list[name] = quantity.DeepCopy()
} else {
value.Add(quantity)
list[name] = value
}
}
if req != nil {
return
}
// If Requests is omitted for a container,
// it defaults to Limits if that is explicitly specified.
for name, quantity := range limit {
if value, ok := list[name]; !ok {
list[name] = quantity.DeepCopy()
} else {
value.Add(quantity)
list[name] = value
}
}
}
type PriorityClassGetFunc func(string) (*v1beta1.PriorityClass, error)
func CalcPGMinResources(minMember int32, replicas map[apiv1.ReplicaType]*apiv1.ReplicaSpec, pcGetFunc PriorityClassGetFunc) *v1.ResourceList {
var replicasPriority ReplicasPriority
for t, replica := range replicas {
rp := ReplicaPriority{0, *replica}
pc := replica.Template.Spec.PriorityClassName
priorityClass, err := pcGetFunc(pc)
if err != nil || priorityClass == nil {
log.Warnf("Ignore task %s priority class %s: %v", t, pc, err)
} else {
rp.priority = priorityClass.Value
}
replicasPriority = append(replicasPriority, rp)
}
sort.Sort(replicasPriority)
minAvailableTasksRes := v1.ResourceList{}
podCnt := int32(0)
for _, task := range replicasPriority {
if task.Replicas == nil {
continue
}
for i := int32(0); i < *task.Replicas; i++ {
if podCnt >= minMember {
break
}
podCnt++
for _, c := range task.Template.Spec.Containers {
AddResourceList(minAvailableTasksRes, c.Resources.Requests, c.Resources.Limits)
}
}
}
return &minAvailableTasksRes
}