Added dns_check support

DataDog · miketheman · May 4, 2016 · Apr 15, 2016 · May 2, 2016 · 5c2c69cd81a99b6c5dbf88e22a336a9fc7f49d2f
commit 5c2c69cd81a99b6c5dbf88e22a336a9fc7f49d2f
diff --git a/recipes/dns_check.rb b/recipes/dns_check.rb
@@ -0,0 +1,33 @@
+include_recipe 'datadog::dd-agent'
+
+# Monitor dns
+#
+# Create one attribute entry for each combination of hostname that
+# you want to monitor + DNS server that you want to monitor it on.
+#
+# node['datadog']['dns_check']['instances'] = [
+#   {
+#     'hostname' => 'foo.example.com',
+#     'nameserver' => 'prod-ns.example.com',
+#     'timeout' => 1
+#   },
+#   {
+#     'hostname' => 'baz.example.com',
+#     'nameserver' => 'prod-ns.example.com',
+#     'timeout' => 1
+#   },
+#   {
+#     'hostname' => 'foo.example.com',
+#     'nameserver' => 'test-ns.example.com',
+#     'timeout' => 3
+#   },
+#   {
+#     'hostname' => 'quux.example.com',
+#     'nameserver' => 'test-ns.example.com',
+#     'timeout' => 3
+#   },
+# ]
+
+datadog_monitor 'dns_check' do
+  instances node['datadog']['dns_check']['instances']
+end
diff --git a/spec/integrations/dns_check_spec.rb b/spec/integrations/dns_check_spec.rb
@@ -0,0 +1,58 @@
+describe 'datadog::dns_check' do
+  expected_yaml = <<-EOF
+  init_config:
+    default_timeout: 4
+
+  instances:
+    - hostname: foo.example.com
+      nameserver: prod-ns.example.com
+      timeout: 1
+    - hostname: bar.example.com
+      nameserver: prod-ns.example.com
+    - hostname: staging.example.com
+      nameserver: test-ns.example.com
+      timeout: 2
+  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',
+        'dns_check' => {
+          'instances' => [
+            {
+              'hostname' => 'foo.example.com',
+              'nameserver' => 'prod-ns.example.com',
+              'timeout' => 1
+            },
+            {
+              'hostname' => 'bar.example.com',
+              'nameserver' => 'prod-ns.example.com'
+            },
+            {
+              'hostname' => 'staging.example.com',
+              'nameserver' => 'test-ns.example.com',
+              'timeout' => 2
+            }
+          ]
+        }
+      }
+    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('dns_check') }
+
+  it 'renders expected YAML config file' do
+    expect(chef_run).to render_file('/etc/dd-agent/conf.d/dns_check.yaml').with_content { |content|
+      expect(YAML.load(content).to_json).to be_json_eql(YAML.load(expected_yaml).to_json)
+    }
+  end
+end
diff --git a/templates/default/dns_check.yaml.erb b/templates/default/dns_check.yaml.erb
@@ -0,0 +1,11 @@
+instances:
+  <% @instances.each do |i| -%>
+  - hostname: <%= i["hostname"] %>
+    nameserver: <%= i["nameserver"] || '127.0.0.1' %>
+    <% unless i["timeout"].nil? %>
+    timeout: <%= i["timeout"] %>
+    <% end %>
+  <% end %>
+
+init_config:
+  default_timeout: 4