Add documentation for managing ECK file-based password length.

[naemono]

The following elastic/cloud-on-k8s#8817 is planned to be released with the ECK 3.2/Stack 9.2 release.

(replaces #3322 as it was based of the wrong branch)

[github-actions]

🔍 Preview links for changed docs

• deploy-manage/deploy/cloud-on-k8s/configure-eck.md
• deploy-manage/users-roles/cluster-or-deployment-auth/managed-credentials-eck.md

[eedugon]

LGTM!
I have suggested to place the applies_to right after the heading, and not after the initial note.

[shainaraskas]

looks really good. I think we want to consider relocating this chunk of info though because it's specific to the file realm. would you consider making it an H4 under the File realm heading?

https://docs-v3-preview.elastic.dev/elastic/docs-content/pull/3339/deploy-manage/users-roles/cluster-or-deployment-auth/managed-credentials-eck#file-realm

[shainaraskas]

(+ approving to unblock)

(oops, guess this tab was old and edu already got you)

[naemono]

looks really good. I think we want to consider relocating this chunk of info though because it's specific to the file realm. would you consider making it an H4 under the File realm heading?

https://docs-v3-preview.elastic.dev/elastic/docs-content/pull/3339/deploy-manage/users-roles/cluster-or-deployment-auth/managed-credentials-eck#file-realm

@shainaraskas , @pebrc and I spoke, and though moving all of this under file realm maybe wasn't the best approach being that the file realm section also explains to customers how to create their own users, which password-length doesn't really apply to. We instead thought creating a new ECK auto-generate credentials section with to sub-sections for 1) rotating and 2) controlling length made more sense. Let us know your thoughts. Thanks.

[shainaraskas]

thanks - this grouping now makes more sense to me. added some additional comments that could clarify things a little further (and I think you have the wrong version # in there)

[shainaraskas]

thanks - this grouping now makes more sense to me. added some additional comments that could clarify things a little further (and I think you have the wrong version # in there)

[shainaraskas]

nice!