Aleksa Sarai

Senior Software Engineer @ SUSE

Aleksa Sarai is a core developer and maintainer of runc and umoci, contributor to the Open Container Initiative specifications. In addition, he's contributed to the Linux kernel as part of his work on containers. He works on the Kubernetes core team at SUSE, maintaining various core parts of the lower levels of the Kubernetes stack and related software for both SUSE Linux Enterprise and openSUSE; he is also committed to working in the open, and is astrong proponent of Free Software.

talkContainer Images Considered Harmful

Effectively all modern container image formats are based on tar, and many proposed improvements to formats are only surface-level changes. In an attempt to make their images smaller, a lot of users end up patching over the underlying issue by using smaller distribution images and stunting their container images. In this talk, we will discuss the many drawbacks of using tar and outline how image formats should be redesigned to be much more efficient. In addition, an overview about the deficiencies in most current methods of building images will be given with some example solutions.

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