A self-sufficient system is a system capable of healing and adaptation. Healing means that the cluster will always be in the designed state. As an example, if a replica of a service goes down, the system needs to bring it back up again. Adaptation, on the other hand, is about modifications of the desired state so that the system can deal with changed conditions. A simple example would be increased traffic. When it happens, services need to be scaled up. When healing and adaptation are automated, we get self-healing and self-adaptation. Together, they both a self-sufficient system that can operate without human intervention.
How does a self-sufficient system look? What are its principal parts? Who are the actors? Continue reading →
Any system that intends to be fully automated and self-sufficient must be capable of self-healing and self-adaptation. As a minimum, it needs to be able to monitor itself and perform certain actions both on service and infrastructure levels.
Two axes can represent the set of actions a system might execute. One group of actions be represented through the differences between infrastructure and services. The other axis can be explained by the type of activities, with self-healing on one end, and self-adaptation on the other. Continue reading →
The third installment in The DevOps Toolkit Series is public! Even though, while I’m writing this post, only 20% of The DevOps 2.2 Toolkit: Self-Healing Clusters is finished, I hope you’ll pick it up and send me your feedback. I need your help in setting the direction of the book. I need you to help me shape it into something great. I need you to help me make this book a community effort.
Jenkins is, by far, the most used CI/CD tool in the market. That comes as no surprise since it’s been around for a while, it has one of the biggest open source communities, it has enterprise version for those who need it, and it is straightforward to extend it to suit (almost) anyone’s needs.
Products that dominate the market for years tend to be stable and very feature rich. Jenkins is no exception. However, with age come some downsides as well. In the case of Jenkins, automation setup is one of the things that has a lot to be desired. If you need Jenkins to serve as an orchestrator of your automation and tasks, you’ll find it to be effortless to use. But, if you need to automate Jenkins itself, you’ll realize that it is not as smooth as you’d expect from modern tools. Never the less, Jenkins setup can be automated, and we’ll go through one possible solution. Continue reading →