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Open Telekom Cloud Image Factory - Introduction

Our Motivation

The Image Factory Project had the goal to provide automatically built Linux images to be used as public images for the Open Telekom Cloud.

In the first step we needed public images for the CeBIT launch in March 2016. So we collected a list of requirements, which had to be fulfilled for building images.

Common image requirements:

  • Images must be supportable and maintainable (security updates)
  • Security hardening of the Images
  • License compliancy
  • Tranparent process of Image creation
  • Reproducible, templated-based Image builds
  • Fully automated frequent builds

Cloud native image requirements:

  • Small images, fast to build, deploy, discard, and cheap to run
  • Generic images, customized and configured on boot-up (cloud-init)
  • Modern (latest stable community and enterprise Linux distros)

The Journey

So we started the Image Factory as a PoC. For the Image build the openSUSE tool KIWI is being used. Kiwi builds the Images based on a template file. Kiwi basically downloads the install packages from the repositories, installs them into a chroot environment, sets up configuration and bootloader and creates a raw disk image file.

For the build process automation we have set up some servers within a tenant on Open Telekom Cloud. Two Jump Servers to access the environment. Some build clients, which create and sign the images. A Fileserver for holding the GIT repository (templates) and saving the build images. And a webserver for publishing the results. Find out more.


We will start a series of blog posts in order to inform you about some more interesting topics from the Image Factory:

  • Hardening / changes to the images
  • Available images and planned roadmap
  • Private Image handling

For questions or feedback, please send us an email: otc-imagefactory(a)

Daniela Ebert Daniela Ebert spent many years as an AIX Engineer in the Solution Delivery department at T-Systems. Leading up to the launch of Open Telekom Could at CeBIT 2016, she developed the technical implementation of the platform. At the moment her work is concentrated on technical development, the evaluation of technical features, and architecture issues.

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