mirror of
https://github.com/cozystack/cozystack.git
synced 2026-11-09 14:02:56 +09:00
Aleksei Sviridkin
612ff85079
The class status controller, the admission webhooks and the API server's budget check all need the same answers: which units of a class are free on a node, which classes clash on a resource name, how a budget key is spelled, and whether a namespace is entitled to vGPU. Kept in one package of pure functions, each rule has a single implementation that every component calls, tested without a cluster. Free units come from Node allocatable and pod requests alone, so no inventory kind or node agent is needed. A node counts only while it is Ready, not cordoned and carries no NoSchedule or NoExecute taint the class does not tolerate, except the three taints Kubernetes sets for a cordon or a node that is not Ready, which the first two rules already decide. Budget keys follow DRA's class-scoped form, so a key never collides with a resource name a device plugin advertises, the key without a class prefix needs no reserved class name, and any key in the domain is recognised as a budget even when it is malformed. When two classes share a resource name, the older one keeps it and the newer one is in conflict, so a mistyped new class cannot take an offer tenants already run on out of service. Assisted-by: LLM Signed-off-by: Aleksei Sviridkin <f@lex.la>
88 lines
2.5 KiB
Go
88 lines
2.5 KiB
Go
/*
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Copyright 2026 The Cozystack 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 model
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import (
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"slices"
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"strings"
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corev1 "k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/util/sets"
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cozyv1alpha1 "github.com/cozystack/cozystack/api/v1alpha1"
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)
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// Class is the part of a GPUClass that capacity and admission read.
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type Class struct {
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Name string
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Created metav1.Time
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Mode cozyv1alpha1.GPUMode
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ResourceName corev1.ResourceName
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Tolerations []corev1.Toleration
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}
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// ClassFrom projects a GPUClass.
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func ClassFrom(c *cozyv1alpha1.GPUClass) Class {
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out := Class{Name: c.Name, Created: c.CreationTimestamp, Mode: c.Spec.Mode}
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for _, t := range c.Spec.Tolerations {
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out.Tolerations = append(out.Tolerations, t.Toleration())
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}
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if dp := c.Spec.Source.DevicePlugin; dp != nil {
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out.ResourceName = corev1.ResourceName(dp.ResourceName)
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}
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return out
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}
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// EffectiveMaxCount returns how many GPUs of the class one VM may take,
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// and false when nothing beyond one node's GPUs limits it.
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func EffectiveMaxCount(spec *cozyv1alpha1.GPUClassSpec) (int32, bool) {
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if spec.MaxCount != nil {
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return *spec.MaxCount, true
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}
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if spec.Mode == cozyv1alpha1.GPUModeVGPU {
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return 1, true
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}
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return 0, false
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}
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// Conflicts returns the classes whose resource name an older class
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// already has, so a new class with a mistyped name cannot take an offer
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// tenants run on out of service. Age is the creation time, the name
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// breaking a tie.
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func Conflicts(classes []Class) sets.Set[string] {
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byName := map[corev1.ResourceName][]Class{}
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for _, c := range classes {
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if c.ResourceName != "" {
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byName[c.ResourceName] = append(byName[c.ResourceName], c)
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}
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}
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out := sets.New[string]()
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for _, group := range byName {
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slices.SortFunc(group, func(a, b Class) int {
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if c := a.Created.Compare(b.Created.Time); c != 0 {
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return c
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}
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return strings.Compare(a.Name, b.Name)
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})
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for _, c := range group[1:] {
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out.Insert(c.Name)
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}
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}
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return out
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}
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