minideb

What is Minideb

A minimalist Debian-based image built specifically to be used as a base image for containers.

Use Minideb

You can use the image directly, e.g.

$ docker run --rm -it bitnami/minideb:latest

There are tags for the different Debian releases.

$ docker run --rm -it bitnami/minideb:stretch

The images are built daily and have the security release enabled, so will contain any security updates released more than 24 hours ago.

You can also use the images as a base for your own Dockerfile:

FROM bitnami/minideb:stretch

Why use Minideb

This image aims to strike a good balance between having small images, and having many quality packages available for easy integration.
The image is based on glibc for wide compatibility, and has apt for access to a large number of packages. In order to reduce size of the image, some things that aren't required in containers are removed:
- Packages that aren't often used in containers (hardware related, init systems etc.)
- Some files that aren't usually required (docs, man pages, locales, caches)
These images also include an install_packages command that you can use instead of apt. This takes care of some things for you:
- Install the named packages, skipping prompts etc.
- Clean up the apt metadata afterwards to keep the image small.
- Retrying if apt fails. Sometimes a package will fail to download due to a network issue, and this may fix that, which is particularly useful in an automated build pipeline.
For example:
```
$ install_packages apache2 memcached
```

Adoption of Minideb

The minideb container image is the base image for many Bitnami-maintained language runtimes including php, nodejs, ruby and infrastructure components including mariadb, redis, nginx and mongodb.

Compatibility

The image points to the Debian archive, so you are free to install packages from there that you need. However because some Essential packages have been removed they may not always install or work correctly.

In those cases you can figure out which package is needed and manually specify to install it along with your desired packages. Please feel free to submit an issue request so that we can reach out and help you quickly.

Security

Minideb is based on Debian and relies on their security updates. The images are built daily and have the security release enabled, so will contain any security updates released more than 24 hours ago.

Note that Debian does not fix every CVE that affects their packages, which means that CVE scanners may detect unfixed vulnerabilities in Minideb images. In those cases, you can check the Debian security tracker to see whether Debian intends to release an update to fix it.

In order to keep compatibility with Debian, we will not patch any vulnerabilities in Minideb directly. If Debian does not fix the CVE then it will also remain in Minideb. If you find a vulnerability that is fixed in Debian but not in the latest images of Minideb then please file an issue as that is not intentional.

On this page, you can find more information about the Bitnami policy regarding CVEs. In the same way, if you find a security issue with how the Minideb images are built or published then please report it to us.

Building Minideb

We provide a Makefile to help you build Minideb locally. It should be run on a Debian based machine and requires sudo privileges.

$ sudo make

To build an individual release (stretch, buster or unstable)

$ sudo make stretch

To test the resulting image:

$ sudo make test-stretch

Building Minideb for foreign architecture

Make commands shown above will build an image for the architecture you are currently working on.
To build an image for a foreign architecture (for example to build a multiarch image), we provide a simple script which run a QEMU instance for the target architecture and build the image inside it.

To build and test a buster image for arm64:

$ ./qemu_build buster arm64

The image will be then imported locally through the docker cli with $distribution-$architecture tag (example: bitnami/minideb:buster-arm64)

Current limitations of qemu_build script:

Can be run only on debian-based distributions
Support AMD64 and ARM64 target architectures only

Contributing

We'd love for you to contribute to this image. You can request new features by creating an issue, or submit a pull request with your contribution.

License

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

next-stack / minideb