install-config-changes

Development

Rules for modifying the install-config format. Use when making any changes in the `pkg/types` package or its subpackages.

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Source SKILL.md: https://github.com/openshift/installer/blob/HEAD/pkg/types/.claude/skills/install-config-changes/SKILL.md

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Deprecating existing fields

NEVER remove fields from or rename fields in the install-config. When modifying an existing field, update the comment to note that it is deprecated. Change the name of the existing Golang struct field to prepend Deprecated, but do NOT change the json tag.

Convert data from deprecated fields in the pkg/types/conversion package.

Versioning

Do not update the install-config version.

Default values

If a new field has a default value, set it once in SetInstallConfigDefaults() (or one of the platform-specific functions it calls out to, if the field is platform-specific) rather than everywhere that the field is referenced.

Validation

Add validation code for any new field in pkg/types/validation (or pkg/types/<platform>/validation for platform-specific fields).

Consider the agent-based method

The agent-based installation method uses the same install-config format, but all of the data must be passed through assisted-service using the cluster-manifests defined in pkg/asset/agent/manifests. (assisted-service uses this data to internally generate another install-config.) New fields are not automatically passed through.

When adding a new field, you MUST ensure that it is correctly handled in agent-based installs. Use the following steps in order:

Check for a non-supported platform

If the new field is platform-specific, check the list of platforms in agent.IsSupportedPlatform(). If the platform is not supported for agent-based installations then no agent-specific changes are required.

Use an existing cluster-manifest field

The new field may already exist in one of the cluster-manifest types. Try fetching the latest version of the github.com/openshift/assisted-service/api module to see. If an equivalent field already exists, populate it using data from the install-config. Sometimes this requires type or string conversion.

Use an install-config override

Fields that do not have a first-class representation in the cluster-manifests can nonetheless be passed through to the install-config generated by assisted-service via the install-config overrides annotation on the AgentClusterInstall manifest.

For this to work though, the field must first exist in the assisted-service's local copy of the install-config struct.

Warn about ignored fields

At the absolute minimum, any fields that are ignored by the agent-based method MUST generate a warning in the validation of agent.OptionalInstallConfig iff they are set to a non-default value.

Regenerate the CRD

When any part of a struct (including comments!) is modified, you must regenerate the CRD (and the deepcopy methods) using the command:

go generate ./pkg/types/installconfig.go