Added Kubernetes recipe

recipes/kubernetes.rb

@@ -0,0 +1,30 @@
+include_recipe 'datadog::dd-agent'
+
+# Monitor kubernetes
+#
+# Assuming you have a kubernetes instance on a given server, you will need to set
+# up the following attributes at some point in your Chef run, in either
+# a role or another cookbook.
+#
+# node['datadog']['kubernetes']['instances'] = [
+#   {
+#     'host'           => 'localhost',
+#     'port'           => 4194,
+#     'method'         => 'http',
+#     'kubelet_port'   => 10255,
+#     'namespace'      => 'default'
+#     'collect_events' => false,
+#     'use_histogram'  => false,
+#     'enabled_rates'  => [
+#       'cpu.*',
+#       'network.*'
+#     ],
+#     'enabled_gauges' => [
+#       'filesystem.*'
+#     ]
+#   }
+# ]
+
+datadog_monitor 'kubernetes' do
+  instances node['datadog']['kubernetes']['instances']
+end

spec/integrations/kubernetes_spec.rb

@@ -0,0 +1,49 @@
+describe 'datadog::kubernetes' do
+  expected_yaml = <<-EOF
+    instances:
+    - host: localhost
+      port: 4194
+      kubelet_port: 10255
+      enabled_rates:
+      - cpu.*
+      - network.*
+    init_config:
+  EOF
+
+  cached(:chef_run) do
+    ChefSpec::SoloRunner.new(step_into: ['datadog_monitor']) do |node|
+      node.automatic['languages'] = { python: { version: '2.7.2' } }
+
+      node.set['datadog'] = {
+        api_key: 'someapikey',
+        kubernetes: {
+          instances: [
+            {
+              host: 'localhost',
+              port: 4194,
+              kubelet_port: 10255,
+              enabled_rates: [
+                'cpu.*',
+                'network.*'
+              ]
+            }
+          ]
+        }
+      }
+    end.converge(described_recipe)
+  end
+
+  subject { chef_run }
+
+  it_behaves_like 'datadog-agent'
+
+  it { is_expected.to include_recipe('datadog::dd-agent') }
+
+  it { is_expected.to add_datadog_monitor('kubernetes') }
+
+  it 'renders expected YAML config file' do
+    expect(chef_run).to render_file('/etc/dd-agent/conf.d/kubernetes.yaml').with_content { |content|
+      expect(YAML.load(content).to_json).to be_json_eql(YAML.load(expected_yaml).to_json)
+    }
+  end
+end

templates/default/kubernetes.yaml.erb

@@ -0,0 +1,4 @@
+<%= JSON.parse(({ 'instances' => @instances }).to_json).to_yaml %>
+
+# Nothing to configure here
+init_config: