Class: Kube::Cluster::Middleware::Annotations

Inherits:
Kube::Cluster::Middleware show all
Defined in:
lib/kube/cluster/middleware/annotations.rb

Overview

Merges annotations into metadata.annotations on every resource. Existing annotations are preserved; the supplied annotations act as defaults that can be overridden per-resource.

stack do
  use Middleware::Annotations,
    "prometheus.io/scrape": "true",
    "prometheus.io/port":   "9090"
end

Instance Method Summary collapse

Constructor Details

#initialize(**annotations) ⇒ Annotations

Returns a new instance of Annotations.



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# File 'lib/kube/cluster/middleware/annotations.rb', line 17

def initialize(**annotations)
  @annotations = annotations.transform_keys(&:to_sym).transform_values(&:to_s)
end

Instance Method Details

#call(manifest) ⇒ Object 



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# File 'lib/kube/cluster/middleware/annotations.rb', line 21

def call(manifest)
  manifest.resources.map! do |resource|
    h = resource.to_h
    h[:metadata] ||= {}
    h[:metadata][:annotations] = @annotations.merge(h[:metadata][:annotations] || {})
    resource.rebuild(h)
  end
end