Andreas/docker-cheat-sheet
1
0
Fork 0
mirror of https://github.com/wsargent/docker-cheat-sheet.git synced 2025-09-22 05:40:50 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

Merge pull request #103 from amirbawab/patch-1

Browse source 
Added section load save and import export
This commit is contained in:
Will Sargent 2016-07-04 19:14:14 -07:00 • committed by GitHub
commit 487ebbc878
1 changed files with 29 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

29
README.md
View file

@ -167,6 +167,35 @@ Images are just [templates for docker containers](https://docs.docker.com/engine
While you can use the `docker rmi` command to remove specific images, there's a tool called [docker-gc](https://github.com/spotify/docker-gc) that will clean up images that are no longer used by any containers in a safe manner.
### Load/Save image
Load an image from file:
```
docker load < my_image.tar.gz
```
Save an existing image:
```
docker save my_image:my_tag > my_image.tar.gz
```
### Import/Export container
Import a container as an image from file:
```
cat my_container.tar.gz | docker import - my_image:my_tag
```
Export an existing container:
```
docker export my_container > my_container.tar.gz
```
### Difference between loading a saved image and importing an exported container as an image ?
Loading an image using the `load` command creates a new image including its history.
Importing a container as an image using the `import` command creates an new image excluding the history which results in a smaller image size compared to loading an image.
## Networks
Docker has a [networks](https://docs.docker.com/engine/userguide/networking/dockernetworks/) feature. Not much is known about it, so this is a good place to expand the cheat sheet. There is a note saying that it's a good way to configure docker containers to talk to each other without using ports. See [working with networks](https://docs.docker.com/engine/userguide/networking/work-with-networks/) for more details.