Overload Detection for Services Running in Containers

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Dr. Maliosz Markosz
Department of Telecommunications and Media Informatics

The topic of my thesis is overload detection in services running in containers. I give an overview about cloud computing, OS-level virtualization techniques and the Kubernetes technology. OS-level virtualization allows applications to run in isolated environments. Kubernetes is a portable and extensible container management platform, which makes configuration and automation easy. It simplifies handling containerized applications and makes it possible for users to deploy, manage and scale multi-container applications.

The goal of this thesis is to communicate with an nginx webserver deployed on Kubernetes as the examined service, analyse the round-trip-time of requests and adjust the workload according to the results, so the outcome is the biggest possible request rate without overloading the server.

I ran a web server in a Kubernetes pod and created workload from another pod using an HTTP load generator application. Based on the statistics of the answers I tried to detect web server overload as accurately as possible and adjusted the request rate to optimize performance.


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