Class: Kdep::ConfigmapOverlay

Inherits:
Object
  • Object
show all
Defined in:
lib/kdep/configmap_overlay.rb

Overview

Overlays rich configmap data from external files onto a helm-owned configmap. Runs after ‘helm upgrade –install` so the chart creates the configmap first; this module rewrites its data keys without touching helm-set labels or annotations.

Two merge strategies:

replace  — fetch live configmap, replace `data:` with only the listed
           keys, `kubectl apply` the full manifest back.
patch    — emit a JSON patch that adds/updates only the listed keys,
           leaving any other data helm wrote intact.

First-deploy safety: if the configmap does not yet exist (chart hasn’t run yet), the overlay is skipped with a warning; a re-run picks it up.

Defined Under Namespace

Classes: Error, Result

Instance Method Summary collapse

Constructor Details

#initialize(overlay, namespace:, path_resolver:, ui:, dry_run: false) ⇒ ConfigmapOverlay

Returns a new instance of ConfigmapOverlay.



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# File 'lib/kdep/configmap_overlay.rb', line 24

def initialize(overlay, namespace:, path_resolver:, ui:, dry_run: false)
  @overlay = overlay
  @namespace = namespace
  @resolver = path_resolver
  @ui = ui
  @dry_run = dry_run
end

Instance Method Details

#apply! ⇒ Object 



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# File 'lib/kdep/configmap_overlay.rb', line 40

def apply!
  case merge_strategy
  when "replace" then apply_replace!
  when "patch"   then apply_patch!
  else
    raise Error, "configmap_overlay #{name}: unknown merge strategy '#{merge_strategy}' (expected replace|patch)"
  end
end

#merge_strategy ⇒ Object 



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# File 'lib/kdep/configmap_overlay.rb', line 36

def merge_strategy
  (@overlay["merge"] || "replace").to_s
end

#name ⇒ Object 



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# File 'lib/kdep/configmap_overlay.rb', line 32

def name
  @overlay["name"]
end