[Docker](EN) How to save or load Docker image file
Update(2020.03.28): Add basic form example
Save and Load docker image files.
Environment and Prerequisite
- Linux base system
- Bash shell(/bin/bash)
- Docker
Save docker image to file
docker save
Basic Form
docker save [OPTIONS] IMAGE(by tag) [IMAGE...]
Basic Form Example
sudo docker save nginx:stable > nginx-stable-image.tar
sudo docker save nginx:stable -o nginx-stable-image.tar
Options
--output , -o: Specify output file name.
Examples
- docker images list
$ sudo docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
nginx stable ac44715da54a 3 weeks ago 109MB
centos centos7.5.1804 cf49811e3cdb 3 months ago 200MB
- centos image example by using redirection
$ sudo docker save centos:centos7.5.1804 > centos-centos7.5.1804-image.tar
$ ls -al centos-centos7.5.1804-image.tar
-rw-rw-r-- 1 twpower twpower 207841280 Jul 4 22:55 centos-centos7.5.1804-image.tar
- nginx image example by using
-ooption
$ sudo docker save nginx:stable -o nginx-stable-image.tar
$ ls -al nginx-stable-image.tar
-rw------- 1 root root 113060352 Jul 4 22:56 nginx-stable-image.tar
Load docker image from file
docker load
Basic Form
docker load [OPTIONS]
Basic Form Example
$ sudo docker load < nginx-stable-image.tar
$ sudo docker load -i nginx-stable-image.tar
Options
--input , -i: Specify image file name that will be loaded.
Examples
- centos image example by using redirection
$ ls -al centos-centos7.5.1804-image.tar
-rw-rw-r-- 1 twpower twpower 207841280 Jul 4 22:55 centos-centos7.5.1804-image.tar
$ sudo docker load < centos-centos7.5.1804-image.tar
4826cdadf1ef: Loading layer 207.8MB/207.8MB
Loaded image: centos:centos7.5.1804
$ sudo docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
centos centos7.5.1804 cf49811e3cdb 3 months ago 200MB
- nginx image example by using
-ioption
$ ls -al nginx-stable-image.tar
-rw------- 1 root root 113060352 Jul 4 22:56 nginx-stable-image.tar
$ sudo docker load -i nginx-stable-image.tar
da9fed87e1d3: Loading layer 54.59MB/54.59MB
0d1174230cc6: Loading layer 3.584kB/3.584kB
Loaded image: nginx:stable
$ sudo docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
nginx stable ac44715da54a 3 weeks ago 109MB
centos centos7.5.1804 cf49811e3cdb 3 months ago 200MB