如何保存所有 Docker 镜像并复制到另一台机器 [英] How to save all Docker images and copy to another machine
问题描述
我的系统上有以下图像列表，我想将所有这些图像复制到远程机器上.
I have the below list of images present on my system and want to copy all these images to a remote machine.
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
u14_py269 latest 6a1ec0b508b3 4 days ago 885.9 MB
u12_py273 latest c2a804894851 4 days ago 686 MB
u12_core latest 0d61eba80df2 4 days ago 629.1 MB
c6_py266 latest cb1a94742d59 4 days ago 1.32 GB
c6_core latest 77c2ed19d87f 4 days ago 1.278 GB
c7_py275 latest bb1d3de68452 4 days ago 1.117 GB
c7_core latest ca14a76e9cca 4 days ago 1.081 GB
u14_py35 latest d110c7e4a1f5 5 days ago 914.5 MB
u14_py34 latest 085a37cb8614 5 days ago 830.7 MB
u14_py276 latest 8927c6167930 5 days ago 834.1 MB
u14_core latest 93ead5abc25b 5 days ago 776.9 MB
centos centos6 36877b5acebb 5 days ago 228.9 MB
ubuntu latest 36248ae4a9ac 5 days ago 188 MB
ubuntu 12.04 94a7cb19a65b 5 days ago 137.8 MB
edgester/gerrit latest ce4e3238052a 6 days ago 735.2 MB
u14_as374_py276 latest fa5fb7189d70 11 days ago 1.497 GB
c721_as373_py275 latest 03ccf6961d0c 11 days ago 844.3 MB
c721_as373_py35 latest b5fece3dd45b 11 days ago 1.127 GB
c171_con_core latest 8af0d24a38a0 2 weeks ago 377.2 MB
u14_as374_php55 latest 29df638e363a 3 weeks ago 1.073 GB
j_u14_as374_php55 latest 29df638e363a 3 weeks ago 1.073 GB
centos centos7 c8a648134623 8 weeks ago 196.6 MB
centos latest c8a648134623 8 weeks ago 196.6 MB
j_u14_as374_py276 latest 28f379d60882 10 weeks ago 871.5 MB
ubuntu 14.04 89d5d8e8bafb 10 weeks ago 187.9 MB
目前我正在使用 保存和加载 Docker 镜像，但我相信一定有更好的方法来处理所有镜像.
Currently I am using method suggested in save and load Docker images, but I believe there must be a better way to deal with all images.
推荐答案
如果你想一次性导出所有图片，创建一个大的 tar 文件:
If you want to export all images at once, create one big tar file:
docker save $(docker images -q) -o /path/to/save/mydockersimages.tar
如果您想在一个 .tar 文件中保存多个图像:
If you want to save multiples images in one .tar file:
IDS=$(docker images | awk '{if ($1 ~ /^(debian|centos)/) print $3}')
docker save $IDS -o /path/to/save/somedockersimages.tar
最后，如果你想导出多张图片，每个图片一个.tar文件(不是磁盘效率:公共层保存在每个.tar文件中):
Finally, if you want to export multiple many images, with one .tar file per images (not disk efficient: common layer are saved in each .tar file):
docker images | awk '{if ($1 ~ /^(openshift|centos)/) print $1 " " $2 " " $3 }' | tr -c "a-z A-Z0-9_.
-" "%" | while read REPOSITORY TAG IMAGE_ID
do
echo "== Saving $REPOSITORY $TAG $IMAGE_ID =="
docker save -o /path/to/save/$REPOSITORY-$TAG-$IMAGE_ID.tar $IMAGE_ID
done
您可能还想保存图像列表，以便可以标记恢复的图像:
You may also want to save the list of images so that the restored images can be tagged:
docker images | sed '1d' | awk '{print $1 " " $2 " " $3}' > mydockersimages.list
在远程机器上，您可以加载(导入)图像:
On the remote machine, you can load (import) the images:
docker load -i /path/to/save/mydockersimages.tar
并标记导入的图像:
while read REPOSITORY TAG IMAGE_ID
do
echo "== Tagging $REPOSITORY $TAG $IMAGE_ID =="
docker tag "$IMAGE_ID" "$REPOSITORY:$TAG"
done < mydockersimages.list
有关保存/加载的更多信息，请阅读:如何在不使用存储库的情况下将 Docker 镜像从一台主机复制到另一台主机
For more information about save/load, read: How to copy Docker images from one host to another without using a repository
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