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97 lines
3.1 KiB
Go
97 lines
3.1 KiB
Go
/*
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Copyright 2017 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 pods
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import (
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"fmt"
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"k8s.io/apimachinery/pkg/util/validation/field"
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api "k8s.io/kubernetes/pkg/apis/core"
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"k8s.io/kubernetes/pkg/fieldpath"
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)
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// ContainerVisitorWithPath is called with each container and the field.Path to that container,
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// and returns true if visiting should continue.
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type ContainerVisitorWithPath func(container *api.Container, path *field.Path) bool
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// VisitContainersWithPath invokes the visitor function with a pointer to the spec
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// of every container in the given pod spec and the field.Path to that container.
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// If visitor returns false, visiting is short-circuited. VisitContainersWithPath returns true if visiting completes,
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// false if visiting was short-circuited.
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func VisitContainersWithPath(podSpec *api.PodSpec, specPath *field.Path, visitor ContainerVisitorWithPath) bool {
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fldPath := specPath.Child("initContainers")
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for i := range podSpec.InitContainers {
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if !visitor(&podSpec.InitContainers[i], fldPath.Index(i)) {
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return false
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}
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}
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fldPath = specPath.Child("containers")
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for i := range podSpec.Containers {
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if !visitor(&podSpec.Containers[i], fldPath.Index(i)) {
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return false
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}
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}
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fldPath = specPath.Child("ephemeralContainers")
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for i := range podSpec.EphemeralContainers {
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if !visitor((*api.Container)(&podSpec.EphemeralContainers[i].EphemeralContainerCommon), fldPath.Index(i)) {
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return false
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}
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}
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return true
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}
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// ConvertDownwardAPIFieldLabel converts the specified downward API field label
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// and its value in the pod of the specified version to the internal version,
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// and returns the converted label and value. This function returns an error if
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// the conversion fails.
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func ConvertDownwardAPIFieldLabel(version, label, value string) (string, string, error) {
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if version != "v1" {
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return "", "", fmt.Errorf("unsupported pod version: %s", version)
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}
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if path, _, ok := fieldpath.SplitMaybeSubscriptedPath(label); ok {
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switch path {
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case "metadata.annotations", "metadata.labels":
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return label, value, nil
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default:
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return "", "", fmt.Errorf("field label does not support subscript: %s", label)
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}
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}
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switch label {
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case "metadata.annotations",
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"metadata.labels",
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"metadata.name",
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"metadata.namespace",
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"metadata.uid",
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"spec.nodeName",
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"spec.restartPolicy",
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"spec.serviceAccountName",
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"spec.schedulerName",
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"status.phase",
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"status.hostIP",
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"status.podIP",
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"status.podIPs":
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return label, value, nil
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// This is for backwards compatibility with old v1 clients which send spec.host
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case "spec.host":
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return "spec.nodeName", value, nil
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default:
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return "", "", fmt.Errorf("field label not supported: %s", label)
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}
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}
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