1. 鏡像轉(zhuǎn)存需求

因K8S鏡像在不開代理的情況下，拉取超時、下載緩慢，導(dǎo)致鏡像拉取不下來?，F(xiàn)在通過在線交互學(xué)習(xí)平臺，進(jìn)行拉取，后轉(zhuǎn)存到docker私有倉庫，再進(jìn)行拉取，可以解決鏡像拉取、下載失敗等問題。

2. 注冊并登陸 killercoda URL

注冊URL：Killercoda Interactive Environments

• 選擇登陸方式

• 輸入郵箱地址

• 前往郵件后臺，查收郵件。

• 點擊click here to login。

• 授權(quán)等待中…

• 注冊登陸完成。

3. 打開playground

4. 在線拉取K8S鏡像并打上標(biāo)簽

controlplane $ docker pull k8s.gcr.io/autoscaling/vpa-admission-controller:0.13.0
0.13.0: Pulling from autoscaling/vpa-admission-controller
fc251a6e7981: Pull complete 
da7e855a5a9b: Pull complete 
Digest: sha256:c857dcbfc071bcdd25bd9835955eda2c05e8846f638d0556475e4b40f2fbd294
Status: Downloaded newer image for k8s.gcr.io/autoscaling/vpa-admission-controller:0.13.0
k8s.gcr.io/autoscaling/vpa-admission-controller:0.13.0controlplane $ docker images
REPOSITORY                                        TAG       IMAGE ID       CREATED         SIZE
k8s.gcr.io/autoscaling/vpa-admission-controller   0.13.0    b285911b0ebb   13 months ago   53.9MB
xybdiy/vpa-admission-controller                   0.12.0    f4325d883003   18 months ago   53.9MB
k8s.gcr.io/autoscaling/vpa-admission-controller   0.12.0    f4325d883003   18 months ago   53.9MBcontrolplane $ docker tag k8s.gcr.io/autoscaling/vpa-admission-controller:0.13.0 xybdiy/vpa-admission-controller:0.13.0
controlplane $ controlplane $ docker images
REPOSITORY                                        TAG       IMAGE ID       CREATED         SIZE
xybdiy/vpa-admission-controller                   0.13.0    b285911b0ebb   13 months ago   53.9MB
k8s.gcr.io/autoscaling/vpa-admission-controller   0.13.0    b285911b0ebb   13 months ago   53.9MB
k8s.gcr.io/autoscaling/vpa-admission-controller   0.12.0    f4325d883003   18 months ago   53.9MB
xybdiy/vpa-admission-controller                   0.12.0    f4325d883003   18 months ago   53.9MB
controlplane $ 

5. 推送K8S鏡像到Docker私有倉庫

controlplane $ docker login
Authenticating with existing credentials...
WARNING! Your password will be stored unencrypted in /root/.docker/config.json.
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-storeLogin Succeeded
controlplane $ docker push xybdiy/vpa-admission-controller:0.13.0
The push refers to repository [docker.io/xybdiy/vpa-admission-controller]
3fe018b48e98: Pushed 
cb60fb9b862c: Pushed 
0.13.0: digest: sha256:28b0ca918c58debf94334c56404223490c475daa2abb2d91bdfc15533ca8df5e size: 739

6. 登陸Docker私有倉庫查看

URL：https://hub.docker.com/