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Slimming down Docker containers

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@ -413,6 +413,25 @@ docker rmi $(docker images -q)
docker images -viz | dot -Tpng -o docker.png docker images -viz | dot -Tpng -o docker.png
``` ```
### Slimming down Docker containers [Intercity Blog](http://bit.ly/1DycW5A)
- Cleaning APT
```
RUN apt-get clean
RUN rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
```
- Flatten an image
```
ID=$(docker run -d image-name /bin/bash)
docker export $ID | docker import – flat-image-name
```
- For backup
```
ID=$(docker run -d image-name /bin/bash)
(docker export $ID | gzip -c > image.tgz)
gzip -dc image.tgz | docker import - flat-image-name
```
## Tools ## Tools
* [Fig](https://github.com/wsargent/docker-cheat-sheet#fig) * [Fig](https://github.com/wsargent/docker-cheat-sheet#fig)