Showing posts from May, 2016

Ubuntu on Dell Latitude E6420 with NVidia and Broadcom

My company sold old laptops to employees and I decided to use the chance to get an affordable and legally licensed Windows 10 system - a Dell Latitude E6420. Unfortunately the system has a Broadcom Wifi card and also ships with an NVidia graphics card which require extra work on Ubuntu 16.04 Xenial Xerus.

After some manual configuration the system works quite well with a power consumption of about 10-15W while writing this blog article. Switching between the Intel and the NVidia graphics card is simple (with a GUI program and requires a logout-login), for most use cases I don't need the NVidia card in any case.

Windows 10 also works well, although it does not support all devices. However, the combined NVidia / Intel graphics systems works better on Windows than on Linux.

In detail, I took the following steps to install an Ubuntu 16.04 and Windows 10 dual boot system.
Step-by-Step Installation RequirementsEither a wired network connection or a USB wifi dongle that works in Ubuntu …

Lifting the Curse of Static Credentials

Summary: Use digital identities, trust relationship and access control lists instead of passwords. In the cloud, this is really easy.
I strongly believe that static credentials are one of the biggest hazards in modern IT environments. Most information security incidents are somehow related to lost or leaked or guessed static credentials, Instagram's Million Dollar Bug is just one very nice example. Static credentials
can be used by anyone who has them - friend or foeare typically very short and can even be brute forced or guessedfor machine or service users have to be stored in configuration files from where they can be leakedare hard to remember for humans so that they will write them down somewhere or store them in filestypically stay the same over a long period of timedon't include any information about the identity of the bearer or userare hard to rotate on a regular base because the change has to happen in several places at the same time All those problems disappear if we …

CoreOS Fest 2016 - Container are production ready!

The CoreOS Fest 2016 in Berlin impressed me very much: A small Open Source company organizes a 2 day conference around their Open Source tools and even flies in a lot of their employees from San Francisco. A win both for Open Source and for Berlin. And CoreOS also announced that they got new funding of $28M:
More interesting for IT people everywhere is the message one can learn here: Container technologies are ready for production. There is a healthy environment of

Open Source solutions: Kubernetes, MesosphereDC/OS, containerd, even OpenStack and others.Commercial editions with vendor support like Tectonic (CoreOS), Mesosphere Enterprise or Hashicorp Atlas3rd party tools solving common problems like persistent storage: StorageOS and Quobyte In fact, choosing the "right" platform starts to become the main problem for those who still run on traditional Virtualization platforms. On the other hand, IT companies who don't evaluate containers in 2016 will be missing out big tim…

OSDC 2016 - Hybrid Cloud

The Open Source Data Center Conference 2016 is a good measure for how the industry changes. Compared to 2014 Cloud topics take more and more space. Both how to build your own on-premise cloud with Mesos, CoreOS or Kubernetes but also how to use the public Cloud.

Maybe not surprising, I used the conference to present my own findings from 2 years of Cloud migration at ImmobilienScout24:

After we first tried to find  way to quickly migrate our data centers into the Cloud we now see that a hybrid approach works better. Data center and cloud are both valued platforms and we will optimize the costs between them.
Hybrid Cloud - A Cloud Migration Strategy Do you use Cloud? Why? What about the 15 year legacy of your data center? How many Enterprise vendors tried to sell you their "Hybrid Cloud" solution? What actually is a Hybrid Cloud?

Cloud computing is not just a new way of running servers or Docker containers. The interesting part of any Cloud offering are managed services that p…