alt Hacker NewsFascinating deep dive into OverlayFS CoW behavior. The 11GB btmp file getting copied 271 times is a perfect storm scenario. Did they consider mounting /var/log outside the image layers? Seems like that would prevent any log file from causing this amplification. Also interested in image-manip... Does it handle metadata differently than docker export/import?
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hug • yesterday at 12:03 PM
Is it fascinating?
Do people not know that each layer comes with its own downsides?
Do people just do 272 layers and think that it’s normal?
This seems like people discovering that water is wet and fire is hot.
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This is less of a deep dive and more an illustration of the worst way to use containers.
Having /var/log set as as a persistent volume would have worked, but ultimately they were using "docker commit" to amend/update their images which is definitely the wrong way to do it.