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87 lines
2.6 KiB
Go
87 lines
2.6 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 e2e_node
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import (
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"os/exec"
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"os/user"
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"time"
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"github.com/golang/glog"
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"k8s.io/apimachinery/pkg/util/sets"
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commontest "k8s.io/kubernetes/test/e2e/common"
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"k8s.io/kubernetes/test/e2e/framework"
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)
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const (
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// Number of attempts to pull an image.
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maxImagePullRetries = 5
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// Sleep duration between image pull retry attempts.
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imagePullRetryDelay = time.Second
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)
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// NodeImageWhiteList is a list of images used in node e2e test. These images will be prepulled
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// before test running so that the image pulling won't fail in actual test.
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var NodeImageWhiteList = sets.NewString(
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"google/cadvisor:latest",
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"gcr.io/google-containers/stress:v1",
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"gcr.io/google_containers/busybox:1.24",
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"gcr.io/google_containers/busybox@sha256:4bdd623e848417d96127e16037743f0cd8b528c026e9175e22a84f639eca58ff",
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"gcr.io/google_containers/nginx-slim:0.7",
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"gcr.io/google_containers/serve_hostname:v1.4",
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"gcr.io/google_containers/netexec:1.7",
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framework.GetPauseImageNameForHostArch(),
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)
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func init() {
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// Union NodeImageWhiteList and CommonImageWhiteList into the framework image white list.
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framework.ImageWhiteList = NodeImageWhiteList.Union(commontest.CommonImageWhiteList)
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}
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// Pre-fetch all images tests depend on so that we don't fail in an actual test.
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func PrePullAllImages() error {
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usr, err := user.Current()
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if err != nil {
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return err
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}
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images := framework.ImageWhiteList.List()
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glog.V(4).Infof("Pre-pulling images %+v", images)
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for _, image := range images {
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var (
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err error
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output []byte
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)
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for i := 0; i < maxImagePullRetries; i++ {
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if i > 0 {
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time.Sleep(imagePullRetryDelay)
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}
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// TODO(random-liu): Use docker client to get rid of docker binary dependency.
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if output, err = exec.Command("docker", "pull", image).CombinedOutput(); err == nil {
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break
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}
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glog.Warningf("Failed to pull %s as user %q, retrying in %s (%d of %d): %v",
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image, usr.Username, imagePullRetryDelay.String(), i+1, maxImagePullRetries, err)
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}
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if err != nil {
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glog.Warningf("Could not pre-pull image %s %v output: %s", image, err, output)
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return err
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}
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}
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return nil
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}
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