MGMT-12662: Add API document for discovery kernel arguments

[ori-amizur]

List all the issues related to this PR

• New Feature
• Enhancement
• Bug fix
• Tests
• Documentation
• CI/CD

What environments does this code impact?

• Automation (CI, tools, etc)
• Cloud
• Operator Managed Deployments
• None

How was this code tested?

• assisted-test-infra environment
• dev-scripts environment
• Reviewer's test appreciated
• Waiting for CI to do a full test run
• Manual (Elaborate on how it was tested)
• No tests needed

Checklist

• Title and description added to both, commit and PR.
• Relevant issues have been associated (see CONTRIBUTING guide)
• This change does not require a documentation update (docstring, docs, README, etc)
• Does this change include unit-tests (note that code changes require unit-tests)

Reviewers Checklist

• Are the title and description (in both PR and commit) meaningful and clear?
• Is there a bug required (and linked) for this change?
• Should this PR be backported?

/cc @filanov

[ori-amizur]

/approve

[filanov]

/assign @avishayt
cc: @romfreiman

[avishayt]

Small changes, otherwise looks great

[avishayt]

Suggested change

	# Discovery Kernel Arguments API
	The way to update discovery kernel arguments is by updating InfraEnv. Currently, only **append** (additional argument) operation is supported.
	# Modifying Kernel Arguments for the Live ISO
	Update the InfraEnv resource to modify the kernel arguments used in the live ISO (during the host discovery phase) . Currently, only the **append** (additional argument) operation is supported.

I suggest also modifying the name of the file, people probably won't guess what "discovery kernel arguments" means.

[avishayt]

Suggested change

	## Kube API
	With Kube API, the kernel arguments are set in the InfraEnv spec section:
	## Kubernetes API
	When using the Kubernetes API, the kernel arguments are set in the InfraEnv spec section:

[romfreiman]

wont it make more sense to add it here:
https://github.com/openshift/assisted-service/blob/master/docs/user-guide/install-customization.md ?

[avishayt]

wont it make more sense to add it here: https://github.com/openshift/assisted-service/blob/master/docs/user-guide/install-customization.md ?

Yes, great point

[openshift-ci]

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This pull-request has been approved by: avishayt, ori-amizur

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