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<!--Delete sections as needed --> https://docs.docker.com/engine/security/rootless/ was too lengthy and giving a false sense that Rootless mode was quite clunky and hard to use, although actually it can be just set up in a single command: ``` dockerd-rootless-setuptool.sh install ``` ## Description <!-- Tell us what you did and why --> ### Commit 1: `engine/security/rootless: split to multiple pages` This commit only splits the page. The content will be updated in subsequent commits. ### Commit 2: `engine/security/rootless: remove outdated/duplicated info` Setup: - `dockerd-rootless-setuptool.sh` has been improved to show help when the prerequisites are not satisfied. Users no longer need to read the **lengthy** "prerequisites" documentation unless they encounter issues. - The document had duplicated descriptions about dbus, uidmap, and machinectl stuffs in several places. Graph drivers: - Rootless OverlayFS has been merged into the upstream since kernel 5.11: torvalds/linux@459c7c565a . Ubuntu no longer patches the kernel. - FUSE-OverlayFS is typically no longer needed on the current supported distros, except EL 8. SELinux: - Remove a workaround for an issue that was already fixed in Docker Engine v20.10.8. CLI: - `docker context use rootless` no longer needs to be executed manually, since Docker v23. (moby/moby#43061) ## Related issues or tickets <!-- Related issues, pull requests, or Jira tickets --> ## Reviews <!-- Notes for reviewers here --> <!-- List applicable reviews (optionally @tag reviewers) --> - [X] Technical review - [X] Editorial review - [ ] Product review ## Preview https://deploy-preview-23302--docsdocker.netlify.app/engine/security/rootless/ --------- Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp> Co-authored-by: Paweł Gronowski <me@woland.xyz> Co-authored-by: Allie Sadler <102604716+aevesdocker@users.noreply.github.com>