75 lines
2.8 KiB
Go
75 lines
2.8 KiB
Go
/*
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Copyright 2021 Intel Corporation
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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 rdt
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import (
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"fmt"
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"github.com/intel/goresctrl/pkg/kubernetes"
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)
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const (
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// RdtContainerAnnotation is the CRI level container annotation for setting
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// the RDT class (CLOS) of a container
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RdtContainerAnnotation = "io.kubernetes.cri.rdt-class"
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// RdtPodAnnotation is a Pod annotation for setting the RDT class (CLOS) of
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// all containers of the pod
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RdtPodAnnotation = "rdt.resources.beta.kubernetes.io/pod"
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// RdtPodAnnotationContainerPrefix is prefix for per-container Pod annotation
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// for setting the RDT class (CLOS) of one container of the pod
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RdtPodAnnotationContainerPrefix = "rdt.resources.beta.kubernetes.io/container."
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)
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// ContainerClassFromAnnotations determines the effective RDT class of a
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// container from the Pod annotations and CRI level container annotations of a
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// container. Verifies that the class exists in goresctrl configuration and that
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// it is allowed to be used.
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func ContainerClassFromAnnotations(containerName string, containerAnnotations, podAnnotations map[string]string) (string, error) {
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clsName, clsOrigin := kubernetes.ContainerClassFromAnnotations(
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RdtContainerAnnotation, RdtPodAnnotation, RdtPodAnnotationContainerPrefix,
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containerName, containerAnnotations, podAnnotations)
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if clsOrigin != kubernetes.ClassOriginNotFound {
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if rdt == nil {
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return "", fmt.Errorf("RDT not initialized, class %q not available", clsName)
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}
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// Verify validity of class name
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if !IsQualifiedClassName(clsName) {
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return "", fmt.Errorf("unqualified RDT class name %q", clsName)
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}
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// If RDT has been initialized we check that the class exists
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if _, ok := rdt.getClass(clsName); !ok {
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return "", fmt.Errorf("RDT class %q does not exist in configuration", clsName)
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}
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// If classes have been configured by goresctrl
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if clsConf, ok := rdt.conf.Classes[unaliasClassName(clsName)]; ok {
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// Check that the class is allowed
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if clsOrigin == kubernetes.ClassOriginPodAnnotation && clsConf.Kubernetes.DenyPodAnnotation {
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return "", fmt.Errorf("RDT class %q not allowed from Pod annotations", clsName)
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} else if clsOrigin == kubernetes.ClassOriginContainerAnnotation && clsConf.Kubernetes.DenyContainerAnnotation {
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return "", fmt.Errorf("RDT class %q not allowed from Container annotation", clsName)
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}
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}
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}
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return clsName, nil
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}
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