117 lines
4.5 KiB
Go
117 lines
4.5 KiB
Go
/*
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Copyright 2016 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 images
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import (
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"fmt"
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"k8s.io/klog/v2"
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kubeadmapi "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm"
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kubeadmapiv1beta3 "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm/v1beta3"
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"k8s.io/kubernetes/cmd/kubeadm/app/constants"
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kubeadmutil "k8s.io/kubernetes/cmd/kubeadm/app/util"
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)
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// GetGenericImage generates and returns a platform agnostic image (backed by manifest list)
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func GetGenericImage(prefix, image, tag string) string {
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return fmt.Sprintf("%s/%s:%s", prefix, image, tag)
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}
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// GetKubernetesImage generates and returns the image for the components managed in the Kubernetes main repository,
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// including the control-plane components and kube-proxy.
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func GetKubernetesImage(image string, cfg *kubeadmapi.ClusterConfiguration) string {
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repoPrefix := cfg.GetControlPlaneImageRepository()
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kubernetesImageTag := kubeadmutil.KubernetesVersionToImageTag(cfg.KubernetesVersion)
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return GetGenericImage(repoPrefix, image, kubernetesImageTag)
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}
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// GetDNSImage generates and returns the image for CoreDNS.
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func GetDNSImage(cfg *kubeadmapi.ClusterConfiguration) string {
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// DNS uses default image repository by default
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dnsImageRepository := cfg.ImageRepository
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// unless an override is specified
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if cfg.DNS.ImageRepository != "" {
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dnsImageRepository = cfg.DNS.ImageRepository
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}
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// Handle the renaming of the official image from "registry.k8s.io/coredns" to "registry.k8s.io/coredns/coredns
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if dnsImageRepository == kubeadmapiv1beta3.DefaultImageRepository {
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dnsImageRepository = fmt.Sprintf("%s/coredns", dnsImageRepository)
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}
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// DNS uses an imageTag that corresponds to the DNS version matching the Kubernetes version
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dnsImageTag := constants.CoreDNSVersion
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// unless an override is specified
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if cfg.DNS.ImageTag != "" {
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dnsImageTag = cfg.DNS.ImageTag
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}
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return GetGenericImage(dnsImageRepository, constants.CoreDNSImageName, dnsImageTag)
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}
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// GetEtcdImage generates and returns the image for etcd
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func GetEtcdImage(cfg *kubeadmapi.ClusterConfiguration) string {
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// Etcd uses default image repository by default
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etcdImageRepository := cfg.ImageRepository
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// unless an override is specified
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if cfg.Etcd.Local != nil && cfg.Etcd.Local.ImageRepository != "" {
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etcdImageRepository = cfg.Etcd.Local.ImageRepository
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}
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// Etcd uses an imageTag that corresponds to the etcd version matching the Kubernetes version
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etcdImageTag := constants.DefaultEtcdVersion
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etcdVersion, warning, err := constants.EtcdSupportedVersion(constants.SupportedEtcdVersion, cfg.KubernetesVersion)
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if err == nil {
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etcdImageTag = etcdVersion.String()
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}
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if warning != nil {
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klog.Warningln(warning)
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}
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// unless an override is specified
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if cfg.Etcd.Local != nil && cfg.Etcd.Local.ImageTag != "" {
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etcdImageTag = cfg.Etcd.Local.ImageTag
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}
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return GetGenericImage(etcdImageRepository, constants.Etcd, etcdImageTag)
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}
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// GetControlPlaneImages returns a list of container images kubeadm expects to use on a control plane node
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func GetControlPlaneImages(cfg *kubeadmapi.ClusterConfiguration) []string {
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images := make([]string, 0)
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// start with core kubernetes images
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images = append(images, GetKubernetesImage(constants.KubeAPIServer, cfg))
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images = append(images, GetKubernetesImage(constants.KubeControllerManager, cfg))
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images = append(images, GetKubernetesImage(constants.KubeScheduler, cfg))
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images = append(images, GetKubernetesImage(constants.KubeProxy, cfg))
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// pause is not available on the ci image repository so use the default image repository.
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images = append(images, GetPauseImage(cfg))
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// if etcd is not external then add the image as it will be required
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if cfg.Etcd.Local != nil {
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images = append(images, GetEtcdImage(cfg))
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}
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// Append the appropriate DNS images
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images = append(images, GetDNSImage(cfg))
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return images
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}
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// GetPauseImage returns the image for the "pause" container
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func GetPauseImage(cfg *kubeadmapi.ClusterConfiguration) string {
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return GetGenericImage(cfg.ImageRepository, "pause", constants.PauseVersion)
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}
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