keps/127: Support User Namespaces#3
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alban
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Sep 28, 2020
Co-authored-by: Alban Crequy <alban@kinvolk.io>
Co-authored-by: Alban Crequy <alban@kinvolk.io>
Co-authored-by: Alban Crequy <alban@kinvolk.io>
Co-authored-by: Alban Crequy <alban@kinvolk.io>
Co-authored-by: Alban Crequy <alban@kinvolk.io>
Co-authored-by: Alban Crequy <alban@kinvolk.io>
alban
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Co-authored-by: Alban Crequy <alban@kinvolk.io>
Co-authored-by: Alban Crequy <alban@kinvolk.io>
…ernetes-enhancements into mauricio/userns_proposal_new
rata
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Sep 28, 2020
Co-authored-by: rata <rata@users.noreply.github.com>
Co-authored-by: rata <rata@users.noreply.github.com>
Co-authored-by: rata <rata@users.noreply.github.com>
Co-authored-by: rata <rata@users.noreply.github.com>
rhatdan
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Oct 8, 2020
| Some runtimes, like cri-o, mitigate these problems by using the `metacopy` | ||
| option of overlayfs. This option avoids copying the whole file content when an | ||
| operation updating only the metadata, like `chown` or `chmod`, is performed. | ||
| This solution could be adopted by other runtimes until a more sophisticated |
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Metadata only copy up
--------------------
When metadata only copy up feature is enabled, overlayfs will only copy
up metadata (as opposed to whole file), when a metadata specific operation
like chown/chmod is performed. Full file will be copied up later when
file is opened for WRITE operation.
Container/storage used by CRI-O mounts an overlay file system with the metacopy=on flag set, it then chowns all of the lower files in the image to match the user namespace to which the container will run. This operation is very quick compared to standard chowning, since none of the files data has to be copied up. If a second container runs on the same image with the same user namespace, then the chowned image is shared, eliminating the need to chown again.
mrunalp
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Oct 15, 2020
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mrunalp
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margamanterola
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Oct 15, 2021
Additional updates to PRR docs
margamanterola
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Oct 15, 2021
Ensure Implementation stategy captured in the KEP matches latest implementation
rata
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Aug 9, 2022
chore: rename to `key_id` and use bytes for metadata
rata
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Aug 7, 2023
…ategy (kubernetes#3661) * Initial KEP for improving pruning in kubectl apply * Add design details Co-authored-by: Katrina Verey <katrina.verey@shopify.com> * Add another open question * Links, clarifications, ownerRef and GKNN explanations * Follow-on to initial feedback, address some unresolved blocks * Fix lint errors * Add more detail about reference implementation (#2) * Apply prune jan25 (#3) * More clearly delineate specification vs kubectl details * Move design details of spec to Design Details section * Updates from synchronous conversation * Remove leftover paragraph (#5) Not an alternative rejected any more, given applyset.k8s.io/inventory * Justin has always been coauthor * KEP-3659: production readiness etc (#4) Fill in the testing/ PRR sections. * Fix test failures * Prune: document confused deputy attack and mitigations Likely pushes us to GKNN-derived IDs. * Constrain applyset id We just choose the constrained applyset id to prevent "applyset ID impersonation". * Update KEP and PRR metadata * Enhance testing description * ID vs name fixes * Fixes from soltysh's review --------- Co-authored-by: Justin Santa Barbara <justinsb@google.com>
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