feat: multi-repo overlay architecture for addon values#628
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Add support for an optional overlay Git repository that provides value overrides for addons without modifying the source platform repo. Changes: - Terraform: 3 new variables (overlay_repo_url, revision, base_path) - Bootstrap addons.yaml: ref:values → ref:defaults + conditional ref:overlay - appset-chart: $values/ → $defaults/ + conditional $overlay/ paths - Fully backward-compatible: empty overlay_repo_url = no change in behavior
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The bootstrap Application loads gitops/bootstrap/ as a directory source,
which parses YAML before ArgoCD processes Go templates. The {{- if }}
conditionals broke YAML parsing.
Fix:
- Always include overlay source, using 'or' to fall back to the main
repo when overlay_repo_url is empty
- Add empty overlay annotations to seed secret so missingkey=error
doesn't fail on missing keys
- ignoreMissingValueFiles: true handles non-existent overlay files
allamand
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hmuthusamy and
punkwalker
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hmuthusamy
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@allamand We have folks testing with the current structure. once that is implemented, we will merge this as this will require changes to the other appset paths we are validating on. @punkwalker Please review this as well |
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Summary
Implements #574 — Multi-Repo Values Overlay Architecture.
Adds support for an optional overlay Git repository (GitLab, CodeCommit, or any Git source) that provides value overrides for addons without modifying the source platform repo.
Changes
platform/infra/terraform/common/variables.tfoverlay_repo_url,overlay_repo_revision,overlay_repo_base_pathplatform/infra/terraform/common/locals.tfgitops/bootstrap/addons.yamlref:values→ref:defaults+ conditionalref:overlaysourceplatform-charts/appset-chart/values.yamlplatform-charts/appset-chart/templates/application-set.yamlplatform-charts/appset-chart/templates/_application_set.tpl$values/→$defaults/+$overlay/paths in valueFiles helperHow to use
The overlay repo structure mirrors the platform repo:
Backward compatibility
overlay_repo_urlis empty (default) → no overlay source rendered → identical behavior to todayignoreMissingValueFiles: truealready in place → missing overlay files are silently skippedCloses #574