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helper.go
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helper.go
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/*
Copyright 2022 The Katalyst 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 helper
import (
"context"
"fmt"
v1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
"github.com/kubewharf/katalyst-api/pkg/consts"
"github.com/kubewharf/katalyst-core/pkg/metaserver"
"github.com/kubewharf/katalyst-core/pkg/metaserver/spd"
"github.com/kubewharf/katalyst-core/pkg/util/general"
)
// PodEnableReclaim checks whether the pod can be reclaimed,
// if node does not enable reclaim, it will return false directly,
// if node enable reclaim, it will check whether the pod is degraded or baseline.
func PodEnableReclaim(ctx context.Context, metaServer *metaserver.MetaServer,
podUID string, nodeEnableReclaim bool,
) (bool, error) {
if !nodeEnableReclaim {
general.Infof("node reclaim disabled")
return false, nil
}
if metaServer == nil {
return false, fmt.Errorf("metaServer is nil")
}
pod, err := metaServer.GetPod(ctx, podUID)
if err != nil {
return false, err
}
// get current service performance level of the pod
pLevel, err := metaServer.ServiceBusinessPerformanceLevel(ctx, pod.ObjectMeta)
if err != nil && !errors.IsNotFound(err) {
return false, err
} else if err != nil {
return true, nil
} else if pLevel == spd.PerformanceLevelPoor {
// if performance level is poor, it can not be reclaimed
general.InfoS("performance level is poor, reclaim disabled", "podUID", podUID)
return false, nil
}
// check whether current pod is service baseline
baseline, err := metaServer.ServiceBaseline(ctx, pod.ObjectMeta)
if err != nil {
return false, err
} else if baseline {
// if pod is baseline, it can not be reclaimed
general.InfoS("pod is regarded as baseline, reclaim disabled", "podUID", podUID)
return false, nil
}
return true, nil
}
func PodPerformanceScore(ctx context.Context, metaServer *metaserver.MetaServer, podUID string) (float64, error) {
if metaServer == nil {
return 0, fmt.Errorf("metaServer is nil")
}
pod, err := metaServer.GetPod(ctx, podUID)
if err != nil {
return 0, err
}
return metaServer.ServiceBusinessPerformanceScore(ctx, pod.ObjectMeta)
}
func PodIsDaemonSet(pod *v1.Pod) bool {
if pod != nil && pod.OwnerReferences != nil {
for _, ownerReference := range pod.OwnerReferences {
if ownerReference.Kind == "DaemonSet" {
return true
}
}
}
return false
}
func IsValidQosLevel(qoslevel string) bool {
if qoslevel == string(consts.QoSLevelReclaimedCores) || qoslevel == string(consts.QoSLevelSharedCores) ||
qoslevel == string(consts.QoSLevelDedicatedCores) || qoslevel == string(consts.QoSLevelSystemCores) {
return true
}
return false
}