Category Archives: DevOps

Using your Synology Diskstation as a SOHO git Server

Yes, you should use GitHub for your public and private repos (IMHO), but if you just need a small office solution with a few machines and / or users and already have a Diskstation (RAID config and backup recommended) why … Continue reading

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Kubernetes & Kops: Make Your Own Encrypted Debian AMI

Kops is the most popular solution to install Kubernetes on AWS in a highly-available way. Debian is the preferred Linux distro for kops, which is somewhat annoying if you see that CoreOS is the preferred container Linux. Moreover, the Debian … Continue reading

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Kubernetes: Make Pods Run on Your Master Nodes

Some pods you might want to run on your master nodes, too. This may be because they are exporting master node metrics or even to save resources: say you want many instances of a specific pod. In that case (and … Continue reading

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Kubernetes: How to Make Your Node a Master

Under some circumstances Kubernetes is forgetting its master nodes (kops, canal). If this happens, your masters will get scheduled full of pods. If this is the case the following command might help you: kubectl taint master1.compute.internal key=node-role.kubernetes.io/master:NoSchedule This command seems … Continue reading

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Kubernetes: How to Delete all Taints from a Node

kubectl patch node node1.compute.internal -p ‘{“spec”:{“taints”:[]}}’

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List of Application Dependencies

Docker and containers in general are revolutionising the way we think about application development and operations. As a new packaging technology I think it perfectly defines the interface between an application and the host it will be running on. In order … Continue reading

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Ops as a competitive differentiator?

Operational aspects of software systems are often treated as second class citizens. The point is that e.g. availability is expected to be a given. FRs (functional requirements) are a differentiator and NFRs (non-functional requirements) are not. So why should anyone … Continue reading

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