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

Inherits:
Middleware
  • Object
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

Instance Method Details

#call(manifest) ⇒ Object 



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# File 'lib/kube/cluster/middleware/annotations.rb', line 20

def call(manifest)
  annotations = @opts.transform_keys(&:to_sym).transform_values(&:to_s)

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