[OSDOCS-5261] TP - External load balancers in place of default for ShiftStack IPI

[maxwelldb]

Version(s): 4.13

Issue: OSDOCS-5261

Link to docs preview:

• https://57520--docspreview.netlify.app/openshift-enterprise/latest/installing/installing_openstack/installing-openstack-installer-custom.html#installation-load-balancing-user-infra_installing-openstack-installer-custom
• https://57520--docspreview.netlify.app/openshift-enterprise/latest/installing/installing_openstack/installing-openstack-installer-custom.html#installation-configuration-parameters-additional-osp_installing-openstack-installer-custom
• https://57520--docspreview.netlify.app/openshift-enterprise/latest/installing/installing_openstack/installing-openstack-installer-custom.html#install-osp-external-lb-config_installing-openstack-installer-custom

Similar sections appear in https://57520--docspreview.netlify.app/openshift-enterprise/latest/installing/installing_openstack/installing-openstack-installer-kuryr.html.

QE review:

• QE has approved this change.

Additional information:

[ocpdocs-previewbot]

🤖 Updated build preview is available at:
https://57520--docspreview.netlify.app

Build log: https://circleci.com/gh/ocpdocs-previewbot/openshift-docs/15291

[maxwelldb]

@EmilienM Starting to put this together. Is this sort of thing essentially what you had in mind?

Additionally, do you think it's worth it to include and validate the Ansible content from your openshift/installer docs?

[EmilienM]

Very good start.

[EmilienM]

@EmilienM Starting to put this together. Is this sort of thing essentially what you had in mind?

Very good. I wonder if we are going to document it for all platforms where this feature works or just OSP?
It also works on BM, nutanix, ovirt (not sure it's supported), and vsphere.

Additionally, do you think it's worth it to include and validate the Ansible content from your openshift/installer docs?

No, my stuff is purely for PoC/dev/CI.

[maxwelldb]

@EmilienM Updated with generic language for on-prem platforms.

modules/installation-load-balancing-user-infra.adoc is used in--I think--all of those platforms, so I can swap in that language in the rendered docs by changing contexts in that file.

[EmilienM]

/lgtm

[openshift-ci]

New changes are detected. LGTM label has been removed.

[maxwelldb]

/cherry-pick enterprise-4.13

[openshift-cherrypick-robot]

@maxwelldb: #57520 failed to apply on top of branch "enterprise-4.13":

Applying: Add install-config example
Applying: rename mod
Applying: Trying out placement
Applying: fixup! Add install-config example
Applying: Add TP snippet
Applying: Structure change and snippet addition to generic mod
Applying: Relocation and param addition
Applying: Attempt to bypass conditional + snippet failure
Applying: Apply gimme suggestions from code review
Applying: More changes from review
Applying: Make usermanaged lb content generic
Applying: ifeval tweak
Applying: Add to Kuryr IPI assembly
Applying: Update language in LB mod to handle u-m LBs
Applying: Add LI for feature in Understanding feature gates
.git/rebase-apply/patch:13: trailing whitespace.
// ** User-managed load balancers for clusters that run on {rh-openstack-first}. Enables user-managed load balancers at deployment. (`REPLACE_ME`) 
warning: 1 line adds whitespace errors.
Using index info to reconstruct a base tree...
M	modules/nodes-cluster-enabling-features-about.adoc
Falling back to patching base and 3-way merge...
Auto-merging modules/nodes-cluster-enabling-features-about.adoc
CONFLICT (content): Merge conflict in modules/nodes-cluster-enabling-features-about.adoc
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
Patch failed at 0015 Add LI for feature in Understanding feature gates
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".

Details

In response to this:

/cherry-pick enterprise-4.13

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