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docs(hck-cli): document image variants, preflight, and arbitrary UID (HCK-17257) - #34

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docs(hck-cli): document image variants, preflight, and arbitrary UID (HCK-17257)#34
bigorn0 wants to merge 1 commit into
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docker/HCK-17257-docs-image-variants

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@bigorn0

@bigorn0 bigorn0 commented Aug 19, 2026

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Summary

  • Add image-variants.md: Ubuntu 26.04 LTS (8.12.8) vs -hardened (Docker Hardened Debian), startup preflight, and arbitrary UID / group 0
  • compose.hardened.yml keeps group_add: ["0"] so overriding user: still matches OpenShift restricted-v2
  • Pin compose examples to hackolade/hck-cli:8.12.8
  • Distinguish the image tag -hardened from the runtime profile compose.hardened.yml

Test plan

  • README / getting-started / k8s / docker-cli-howto links to image-variants.md
  • compose.hardened.yml documents Ubuntu 26.04 LTS vs DHI and group_add: ["0"]
  • After merge: docker compose -f Studio/compose.hardened.yml run --rm --user 31337:31337 hck-cli still writes /data because of group_add

Companion: studio #6154 · hck-cli #42 · HCK-17257

…(HCK-17257)

Distinguish Ubuntu 26.04 LTS (8.12.8) from the -hardened DHI tag, document
startup preflight, and require group 0 (group_add / fsGroup) for a random UID.

Co-authored-by: Cursor <cursoragent@cursor.com>
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