DOCKER CONCEPT FOR DBA– PART 9 : How to use docker tar command in docker to re-instantiate new docker
1.Creating docker tar file from docker image.We can transfer that tar file and import to another docker instance.
root@deb-VirtualBox:~# docker image save mywebserver:v1>mywebserver.tar
root@deb-VirtualBox:~# ls -ltr mywebserver.tar
-rw-r–r– 1 root root 330399232 May 2 19:53 mywebserver.tar
2.Remove the existing docker image
root@deb-VirtualBox:~# docker rmi -f mywebserver:v1
Untagged: mywebserver:v1
3.Please note the image is deleted
root@deb-VirtualBox:~# docker images
4.Now we can re-import docker image from docker tar
root@deb-VirtualBox:~# docker import mywebserver.tar mywebserver:v1
sha256:d749c49988b578c7f3183eccdf135520f4b1e8778a3770c4ad9755f32d243b3f
root@deb-VirtualBox:~# docker import mywebserver.tar mywebserver:latest
sha256:1d666b38b200ec0c6c47399890b15ba856b3ae2811cd8c90080f1faa81ed9c56
5.I have 2 images of the mywebserver
root@deb-VirtualBox:~# docker images
About the Author
debasis maity
12+ years of rich experience on Database Administrations and on Infrastructure Solution Architect. AWS Certified Solution Architect and Senior Oracle DBA