deploy-guide: document the seed container

[ideaship]

Summary

Documents the seed container (registry.osism.tech/osism/seed) in the deploy guide, which was previously undocumented — the guide only described installing packages on the seed node by hand.

• seed.md: presents the seed container as Option 1 (needs nothing but Docker/Podman on the seed node) and keeps the manual package installation as Option 2. Points to the maintained image location and notes that quay.io/osism/seed is no longer updated.
• manager.md: explains that run.sh automatically runs the playbooks inside the seed container when a container engine is present (SEED_CONTAINER=auto, the default), so every Manager step stays a plain ./run.sh <playbook>. Documents the two knobs a deployer actually chooses (SEED_CONTAINER, CONTAINER_ENGINE) plus SEED_CONTAINER_MOUNT_OPTS.

Related

• Seed container image this guide documents (per-release collection sets): Add multi-release seed container (runtime collection-set selection) container-images#935
• Manager run.sh SEED_CONTAINER path the guide describes: run.sh: run playbooks in the seed container generics#596

AI-assisted: Claude Code

[github-actions]

✅⚠️MegaLinter analysis: Success with warnings

Descriptor	Linter	Files	Fixed	Errors	Warnings	Elapsed time
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✅ JSON	prettier	4		0	0	0.37s
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⚠️ MARKDOWN	markdownlint	160		4	0	2.91s
⚠️ MARKDOWN	markdown-table-formatter	160		1	0	0.46s
✅ REPOSITORY	checkov	yes		no	no	19.87s
✅ REPOSITORY	git_diff	yes		no	no	0.07s
✅ REPOSITORY	secretlint	yes		no	no	1.72s
✅ REPOSITORY	trufflehog	yes		no	no	3.85s
✅ SPELL	codespell	169		0	0	0.69s
⚠️ SPELL	lychee	169		2	0	40.79s
✅ YAML	prettier	5		0	0	0.42s
✅ YAML	v8r	5		0	0	5.99s
✅ YAML	yamllint	5		0	0	0.58s

Detailed Issues

⚠️ SPELL / lychee - 2 errors

📝 Summary
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🔍 Total..........921
🔗 Unique.........745
✅ Successful.....845
⏳ Timeouts........13
🔀 Redirected......41
👻 Excluded........61
❓ Unknown..........0
🚫 Errors...........2
⛔ Unsupported......2

Errors in docs/guides/configuration-guide/openstack/ceilometer.md
[ERROR] https://docs.openstack.org/ceilometer/latest/admin/index.html (at 7:3) | Connection closed before response completed

Errors in docs/guides/configuration-guide/openstack/designate.md
[ERROR] https://docs.openstack.org/designate/latest/admin/config.html (at 9:3) | Connection closed before response completed

Errors in docs/guides/developer-guide/zuul.md
[TIMEOUT] https://zuul.services.osism.tech/t/osism/builds?project=osism%2Fcontainer-image-ceph-ansible&pipeline=periodic-daily&skip=0 (at 366:3) | Request timed out
[TIMEOUT] https://zuul.services.osism.tech/t/osism/builds?project=osism%2Fcontainer-image-kolla-ansible&pipeline=periodic-daily&skip=0 (at 367:3) | Request timed out
[TIMEOUT] https://zuul.services.osism.tech/t/osism/builds?project=osism%2Fcontainer-image-osism-ansible&pipeline=periodic-daily&skip=0 (at 368:3) | Request timed out
[TIMEOUT] https://zuul.services.osism.tech/t/osism/builds?project=osism%2Fcontainer-images-kolla&pipeline=periodic-midnight&skip=0 (at 369:3) | Request timed out
[TIMEOUT] https://zuul.services.osism.tech/t/osism/builds?project=osism%2Ftestbed&pipeline=periodic-daily&skip=0 (at 370:3) | Request timed out
[TIMEOUT] https://zuul.services.osism.tech/t/osism/buildsets?pipeline=label (at 26:26) | Request timed out
[TIMEOUT] https://zuul.services.osism.tech/t/osism/status (at 14:1) | Request timed out

Errors in docs/index.md
[TIMEOUT] https://tldp.org/ (at 62:1) | Request timed out

Errors in docs/testbed/appendix.mdx
[TIMEOUT] https://regio.digital/ (at 14:58) | Request timed out
[TIMEOUT] https://zuul.services.osism.tech/t/osism/builds?project=osism%2Ftestbed&skip=0 (at 164:21) | Request timed out

Errors in docs/testbed/index.md
[TIMEOUT] https://regio.digital/ (at 20:67) | Request timed out

Errors in docs/testbed/prerequisites.mdx
[TIMEOUT] https://regio.digital/ (at 36:41) | Request timed out

Errors in docs/testbed/usage.mdx
[TIMEOUT] https://regio.digital/ (at 23:20) | Request timed out

Hint: Followed 41 redirects. You might want to consider replacing redirecting URLs with the resolved URLs. Use verbose mode (`-v`/`-vv`) to see redirection details.

⚠️ MARKDOWN / markdown-table-formatter - 1 error

1 files contain markdown tables to format:
- docs/guides/developer-guide/retiring-openstack-releases.md

⚠️ MARKDOWN / markdownlint - 4 errors

docs/guides/developer-guide/retiring-openstack-releases.md:181:450 error MD060/table-column-style Table column style [Table pipe does not align with header for style "aligned"]
docs/guides/developer-guide/retiring-openstack-releases.md:181:535 error MD060/table-column-style Table column style [Table pipe does not align with header for style "aligned"]
docs/guides/developer-guide/retiring-openstack-releases.md:183:417 error MD060/table-column-style Table column style [Table pipe does not align with header for style "aligned"]
docs/guides/developer-guide/retiring-openstack-releases.md:183:502 error MD060/table-column-style Table column style [Table pipe does not align with header for style "aligned"]

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[jklare]

LGTM, but we should merge the direct dependencies on the script refactoring first i guess.