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Document "scratch" mountpoint #223
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This is a tough one to document.
/scratchis made available for every container so it applies to everything in a pipeline. I'm going to pin this issue for now to help people discover it. I'm open to any suggestions people have for which page this info should live on.- pinned this issue
on Aug 11, 2025
Hey,
In concourse/concourse#1045, there was the initial work to have
/scratch, a mountpoint that allows one to bypass overlay and have a direct mount to the underlying filesystem (that overlay sits on top of).While that detail is leveraged by resources like
docker-image-resource, that is not documented inci.concourse-ci.org.Having this mount point documented under our docs could then allow folks to more easily discover this future and work around problems that
overlaymight cause once we migrate frombtrfsas a default preference indetecttooverlay(see concourse/concourse#4071).Thanks!