Class: Kube::Cluster::Manifest

Inherits:
Schema::Manifest
  • Object
show all
Defined in:
lib/kube/cluster/manifest.rb

Overview

A flat, ordered collection of Kubernetes resources.

Manifest is a pure resource collection. Middleware is applied separately via Kube::Cluster::Middleware::Stack.

manifest = Kube::Cluster::Manifest.new
manifest << Kube::Cluster["Deployment"].new { ... }

stack = Kube::Cluster::Middleware::Stack.new do
  use Middleware::Namespace, "production"
  use Middleware::Labels, app: "web-app"
end

stack.call(manifest)
manifest.to_yaml

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#resources ⇒ Object (readonly)

Returns the value of attribute resources.



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# File 'lib/kube/cluster/manifest.rb', line 25

def resources
  @resources
end

Instance Method Details

#<<(item) ⇒ Object

Override << to automatically upgrade Kube::Schema::Resource instances into Kube::Cluster::Resource instances. This ensures resources parsed via Kube::Schema::Manifest (e.g. from Helm charts or downloaded YAML) gain cluster-level methods like cluster_scoped?, pod_bearing?, and rebuild when composed into a cluster manifest.



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# File 'lib/kube/cluster/manifest.rb', line 33

def <<(item)
  case item
  when Kube::Cluster::Resource
    @resources << item
  when Kube::Schema::Resource
    @resources << Kube::Cluster[item.kind].new(item.to_h)
  when Kube::Schema::Manifest
    item.each { |r| self << r }
  when Array
    item.each { |r| self << r }
  else
    raise ArgumentError,
      "Expected a Kube::Schema::Resource or Manifest, got #{item.class}. " \
      "Use Kube::Schema.parse(hash) to convert hashes."
  end

  self
end