使用方式如下 :
1. 先下載並執行一個centos docker image
# docker run -it centos /bin/bash
2. 進入container之後,進行任何想要的變更,並退出container
3. 查看執行狀態 (記下CONTAINER ID)
# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED
0ae760c48e30 centos "/bin/bash" About a minute ago
3. export docker image
4. import docker image
# cat centos.tar | docker import - centos:v1.1
sha256:e5d5c21610200d3f06f189b56bca111a54e85da0ce0ce296dbe19482738ad896
# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
centos v1.1 e5d5c2161020 7 seconds ago 192.5 MB
請注意:
所以,如果要把完整的image做export,建議使用docker save and docker load