Export / Import
Export a container’s filesystem as a tar archive.
将容器的文件系统导出为tar存档文件
只导出当前容器的信息
## # Usage： # docker export [OPTIONS] CONTAINER # Options： # --output , -o Write to a file, instead of STDOUT $ docker export red_panda > latest.tar $ docker export --output="latest.tar" red_panda
Import the contents from a tarball to create a filesystem image
从tarball中导入内容以创建文件系统镜像
是将当前容器 变成一个新的镜像
## # Usage： # docker import [OPTIONS] file|URL|- [REPOSITORY[:TAG]] # Options： # --change , -c Apply Dockerfile instruction to the created image # --message , -m Set commit message for imported image $ docker import exampleimage.tgz --message "New image imported from tarball" - exampleimagelocal:new
Save/Load
Save one or more images to a tar archive (streamed to STDOUT by default)
将一个或多个镜像保存到tar存档
保存镜像所有的信息-包含历史
## # Usage： # docker save [OPTIONS] IMAGE [IMAGE...] # Options： # --output , -o Write to a file, instead of STDOUT $ docker save busybox > busybox.tar $ docker save --output busybox.tar busybox
## # You can even cherry-pick particular tags of an image repository. $ docker save -o ubuntu.tar ubuntu:lucid ubuntu:saucy
## # [root@ec-k8s-m1 ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE spark v2.3.2 9c672c188d7e 23 hours ago [root@ec-k8s-m1 spark]# docker save -o spark-v2.3.2.tar spark:v2.3.2 spark:v2.3.2 [root@ec-k8s-m1 spark]# ll -h total 334M -rw------- 1 root root 334M Oct 31 15:32 spark-2.3.2.tar
Load an image from a tar archive or STDIN
从tar存档或STDIN加载镜像
## # Usage： # docker load [OPTIONS] # Options： # --input , -i Read from tar archive file, instead of STDIN # --quiet , -q Suppress the load output $ docker image ls REPOSITORY TAG IMAGE ID CREATED SIZE $ docker load < busybox.tar.gz Loaded image: busybox:latest $ docker images REPOSITORY TAG IMAGE ID CREATED SIZE busybox latest 769b9341d937 7 weeks ago 2.489 MB $ docker load --input fedora.tar Loaded image: fedora:rawhide Loaded image: fedora:20 $ docker images REPOSITORY TAG IMAGE ID CREATED SIZE busybox latest 769b9341d937 7 weeks ago 2.489 MB fedora rawhide 0d20aec6529d 7 weeks ago 387 MB
## # 导入 spark-v2.3.2.tar 镜像 [root@ec-k8s-n1 spark]# docker load < spark-v2.3.2.tar 0c3170905795: Loading layer [==================================================>] 3.584kB/3.584kB ed6f0bd39121: Loading layer [==================================================>] 99.1MB/99.1MB a659c7f40c43: Loading layer [==================================================>] 5.844MB/5.844MB 59983af52084: Loading layer [==================================================>] 234.9MB/234.9MB a6a614c9dc62: Loading layer [==================================================>] 70.66kB/70.66kB aebd98385dbf: Loading layer [==================================================>] 58.37kB/58.37kB ed15fd2fc4f8: Loading layer [==================================================>] 26.11kB/26.11kB 0adf64250f69: Loading layer [==================================================>] 5.12kB/5.12kB c14134bcf8d2: Loading layer [==================================================>] 3.96MB/3.96MB 11630c7ac125: Loading layer [==================================================>] 784.9kB/784.9kB Loaded image: spark:v2.3.2 [root@ec-k8s-n1 spark]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE spark v2.3.2 9c672c188d7e 24 hours ago 346MB ......
参考资料：
https://docs.docker.com/engine/reference/commandline/
