從公共注冊表將Docker映像映像導入OpenShift

Question

我試圖從部署Ubuntu的圖片在這里對OpenShift在線（下一代）。 這些是我遵循的步驟

$ oc new-project test
$ oc new-app jedisct1/phusion-baseimage-latest

I then deployed from the WebConsole

但是，在pod頁面上，部署失敗，錯誤狀態為“映像已撤回”。 我可能做錯了什么特別的事情？

以下是整個過程的日志。

root@home:~# oc new-project test
Now using project "test" on server "https://api.preview.openshift.com:443".

You can add applications to this project with the 'new-app' command. For example, try:

    $ oc new-app centos/ruby-22-centos7~https://github.com/openshift/ruby-hello-world.git

to build a new hello-world application in Ruby.

root@home:~# oc new-app jedisct1/phusion-baseimage-latest
--> Found Docker image 7ff0885 (14 hours old) from Docker Hub for "jedisct1/phusion-baseimage-latest"

    * An image stream will be created as "phusion-baseimage-latest:latest" that will track this image
    * This image will be deployed in deployment config "phusion-baseimage-latest"
    * The image does not expose any ports - if you want to load balance or send traffic to this component
      you will need to create a service with 'expose dc/phusion-baseimage-latest --port=[port]' later
    * WARNING: Image "phusion-baseimage-latest" runs as the 'root' user which may not be permitted by your cluster administrator

--> Creating resources with label app=phusion-baseimage-latest ...
    imagestream "phusion-baseimage-latest" created
    deploymentconfig "phusion-baseimage-latest" created
--> Success
    Run 'oc status' to view your app.

root@home:~# oc status
In project test on server https://api.preview.openshift.com:443

dc/phusion-baseimage-latest deploys istag/phusion-baseimage-latest:latest
  deployment #1 pending on image or update

1 warning identified, use 'oc status -v' to see details.

root@home:~# oc status -v
In project test on server https://api.preview.openshift.com:443

dc/phusion-baseimage-latest deploys istag/phusion-baseimage-latest:latest
  deployment #1 pending on image or update

Warnings:
  * dc/phusion-baseimage-latest has no readiness probe to verify pods are ready to accept traffic or ensure deployment is successful.
    try: oc set probe dc/phusion-baseimage-latest --readiness ...

View details with 'oc describe <resource>/<name>' or list everything with 'oc get all'.

root@home:~# oc status -v
In project test on server https://api.preview.openshift.com:443

dc/phusion-baseimage-latest deploys istag/phusion-baseimage-latest:latest
  deployment #2 running for 2 minutes - 1 pod

Answer 1

我也嘗試在Openshift中在線提取相同的圖像，但發現了“清單未知錯誤”。

正如Clayton在此答案中指出的那樣，這是DockerHub的兼容性問題。

API錯誤（500）：清單未知：清單未知

Answer 2

1. using Docker < 1.10 pull the image

2. tag it either as

     docker.io/<yourname>/imagename

     or

     ${INTERNAL_DOCKER_REGISTRY_IP}/openshift/imagename

3. push it using the same tag

4. deploy from that

使用docker <1.10，您可以確定推送的映像將是架構v1，可通過當前注冊表版本和docker 1.9導入。

提取映像沒有問題，因為Docker集線器會將其即時轉換為架構v1，該架構的摘要與集線器上的摘要不同。 因此，如果您嘗試使用此摘要進行提取，則將失敗，因為該摘要未存儲在集線器上。 因此，部署程序將失敗，因為docker無法提取給定的摘要。

基本上，只要使用docker <1.10，就可以將其推送到任何地方，這樣就可以確保生成的映像清單將是架構v1-這樣的清單可以被任何版本的OpenShift和docker安全地使用。

替代方法

您還可以使用所需的任何Docker版本將其推送到OpenShift Online。 因為OpenShift的注冊表僅存儲v1模式。 然后參考推送的映像，而不是Docker Hub上的原始源。