Class: HPAForDeploymentMiddlewareTest

Inherits:
Minitest::Test
  • Object
show all
Defined in:
lib/kube/cluster/middleware/hpa_for_deployment.rb

Constant Summary collapse

Middleware = 
Kube::Cluster::Middleware

Instance Method Summary collapse

Instance Method Details

#test_custom_cpu_and_memory_targets ⇒ Object 



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# File 'lib/kube/cluster/middleware/hpa_for_deployment.rb', line 166

def test_custom_cpu_and_memory_targets
  m = manifest(Kube::Cluster["Deployment"].new {
    metadata.name = "web"
    metadata.labels = { "app.kubernetes.io/autoscale": "1-3" }
    spec.selector.matchLabels = { app: "web" }
    spec.template.metadata.labels = { app: "web" }
    spec.template.spec.containers = [
      { name: "web", image: "nginx" },
    ]
  })

  Middleware::HPAForDeployment.new(cpu: 60, memory: 70).call(m)
  hpa = m.resources.last.to_h

  assert_equal 60, hpa.dig(:spec, :metrics, 0, :resource, :target, :averageUtilization)
  assert_equal 70, hpa.dig(:spec, :metrics, 1, :resource, :target, :averageUtilization)
end

#test_generates_hpa_from_deployment ⇒ Object 



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# File 'lib/kube/cluster/middleware/hpa_for_deployment.rb', line 124

def test_generates_hpa_from_deployment
  m = manifest(Kube::Cluster["Deployment"].new {
    metadata.name = "web"
    metadata.namespace = "production"
    metadata.labels = {
      "app.kubernetes.io/name": "web",
      "app.kubernetes.io/autoscale": "2-10",
    }
    spec.selector.matchLabels = { app: "web" }
    spec.template.metadata.labels = { app: "web" }
    spec.template.spec.containers = [
      { name: "web", image: "nginx" },
    ]
  })

  Middleware::HPAForDeployment.new.call(m)

  assert_equal 2, m.resources.size

  deploy, hpa = m.resources
  assert_equal "Deployment", deploy.to_h[:kind]
  assert_equal "HorizontalPodAutoscaler", hpa.to_h[:kind]

  hh = hpa.to_h
  assert_equal "web", hh.dig(:metadata, :name)
  assert_equal "production", hh.dig(:metadata, :namespace)
  assert_equal 2, hh.dig(:spec, :minReplicas)
  assert_equal 10, hh.dig(:spec, :maxReplicas)

  ref = hh.dig(:spec, :scaleTargetRef)
  assert_equal "apps/v1", ref[:apiVersion]
  assert_equal "Deployment", ref[:kind]
  assert_equal "web", ref[:name]

  metrics = hh.dig(:spec, :metrics)
  assert_equal 2, metrics.size
  assert_equal "cpu", metrics[0].dig(:resource, :name)
  assert_equal 75, metrics[0].dig(:resource, :target, :averageUtilization)
  assert_equal "memory", metrics[1].dig(:resource, :name)
  assert_equal 80, metrics[1].dig(:resource, :target, :averageUtilization)
end

#test_raises_on_invalid_range_format ⇒ Object 



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# File 'lib/kube/cluster/middleware/hpa_for_deployment.rb', line 231

def test_raises_on_invalid_range_format
  m = manifest(Kube::Cluster["Deployment"].new {
    metadata.name = "web"
    metadata.labels = { "app.kubernetes.io/autoscale": "bad" }
    spec.selector.matchLabels = { app: "web" }
    spec.template.metadata.labels = { app: "web" }
    spec.template.spec.containers = [
      { name: "web", image: "nginx" },
    ]
  })

  error = assert_raises(ArgumentError) do
    Middleware::HPAForDeployment.new.call(m)
  end

  assert_includes error.message, "Invalid autoscale label"
end

#test_raises_on_invalid_range_values ⇒ Object 



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# File 'lib/kube/cluster/middleware/hpa_for_deployment.rb', line 249

def test_raises_on_invalid_range_values
  m = manifest(Kube::Cluster["Deployment"].new {
    metadata.name = "web"
    metadata.labels = { "app.kubernetes.io/autoscale": "5-2" }
    spec.selector.matchLabels = { app: "web" }
    spec.template.metadata.labels = { app: "web" }
    spec.template.spec.containers = [
      { name: "web", image: "nginx" },
    ]
  })

  error = assert_raises(ArgumentError) do
    Middleware::HPAForDeployment.new.call(m)
  end

  assert_includes error.message, "Invalid autoscale range"
end

#test_skips_deployment_without_autoscale_label ⇒ Object 



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# File 'lib/kube/cluster/middleware/hpa_for_deployment.rb', line 205

def test_skips_deployment_without_autoscale_label
  m = manifest(Kube::Cluster["Deployment"].new {
    metadata.name = "web"
    spec.selector.matchLabels = { app: "web" }
    spec.template.metadata.labels = { app: "web" }
    spec.template.spec.containers = [
      { name: "web", image: "nginx" },
    ]
  })

  Middleware::HPAForDeployment.new.call(m)

  assert_equal 1, m.resources.size
end

#test_skips_non_pod_bearing_resources ⇒ Object 



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# File 'lib/kube/cluster/middleware/hpa_for_deployment.rb', line 220

def test_skips_non_pod_bearing_resources
  m = manifest(Kube::Cluster["ConfigMap"].new {
    metadata.name = "config"
    metadata.labels = { "app.kubernetes.io/autoscale": "1-5" }
  })

  Middleware::HPAForDeployment.new.call(m)

  assert_equal 1, m.resources.size
end

#test_strips_autoscale_label_from_hpa ⇒ Object 



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# File 'lib/kube/cluster/middleware/hpa_for_deployment.rb', line 184

def test_strips_autoscale_label_from_hpa
  m = manifest(Kube::Cluster["Deployment"].new {
    metadata.name = "web"
    metadata.labels = {
      "app.kubernetes.io/name": "web",
      "app.kubernetes.io/autoscale": "1-5",
    }
    spec.selector.matchLabels = { app: "web" }
    spec.template.metadata.labels = { app: "web" }
    spec.template.spec.containers = [
      { name: "web", image: "nginx" },
    ]
  })

  Middleware::HPAForDeployment.new.call(m)
  hpa_labels = m.resources.last.to_h.dig(:metadata, :labels)

  assert_nil hpa_labels[:"app.kubernetes.io/autoscale"]
  assert_equal "web", hpa_labels[:"app.kubernetes.io/name"]
end

#test_works_with_statefulset ⇒ Object 



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# File 'lib/kube/cluster/middleware/hpa_for_deployment.rb', line 267

def test_works_with_statefulset
  m = manifest(Kube::Cluster["StatefulSet"].new {
    metadata.name = "db"
    metadata.labels = { "app.kubernetes.io/autoscale": "1-3" }
    spec.selector.matchLabels = { app: "db" }
    spec.template.metadata.labels = { app: "db" }
    spec.template.spec.containers = [
      { name: "postgres", image: "postgres:16" },
    ]
  })

  Middleware::HPAForDeployment.new.call(m)

  assert_equal 2, m.resources.size
  hpa = m.resources.last.to_h
  assert_equal "StatefulSet", hpa.dig(:spec, :scaleTargetRef, :kind)
end