Class: Kube::Cluster::Manifest::Middleware::ServiceForDeployment

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

Overview

Generates a Service for every pod-bearing resource that has containers with named ports.

The generated Service uses spec.selector.matchLabels from the source resource and maps each named container port.

Labels and namespace are copied from the source resource, so subsequent middleware (Labels, Namespace, etc.) will also apply to the generated Service.

stack do
  use Middleware::ServiceForDeployment
end

Constant Summary

Constants inherited from Kube::Cluster::Manifest::Middleware

CLUSTER_SCOPED_KINDS, POD_BEARING_KINDS

Instance Method Summary collapse

Methods inherited from Kube::Cluster::Manifest::Middleware

#initialize

Constructor Details

This class inherits a constructor from Kube::Cluster::Manifest::Middleware

Instance Method Details

#call(resource) ⇒ Object 



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# File 'lib/kube/cluster/manifest/middleware/service_for_deployment.rb', line 22

def call(resource)
  return resource unless pod_bearing?(resource)

  h = resource.to_h
  ports = extract_ports(h)
  return resource if ports.empty?

  match_labels = h.dig(:spec, :selector, :matchLabels)
  return resource unless match_labels && !match_labels.empty?

  service = Kube::Schema["Service"].new {
    metadata.name      = h.dig(:metadata, :name)
    metadata.namespace = h.dig(:metadata, :namespace) if h.dig(:metadata, :namespace)
    metadata.labels    = h.dig(:metadata, :labels) || {}

    spec.selector = match_labels
    spec.ports = ports.map { |p|
      {
        name:       p[:name],
        port:       p[:containerPort],
        targetPort: p[:name],
        protocol:   p.fetch(:protocol, "TCP"),
      }
    }
  }

  [resource, service]
end