Fixed #339 - create gunicorn recipe

recipes/gunicorn.rb

@@ -0,0 +1,30 @@
+#
+# Cookbook Name:: datadog
+# Recipe:: gunicorn
+#
+
+# Monitor gunicorn
+#
+# NB: This check requires the python environment on which gunicorn runs to
+# have the `setproctitle` module installed:
+# (https://pypi.python.org/pypi/setproctitle/)
+#
+# Example gunicorn.yaml file:
+#
+# init_config:
+#
+#
+# instances:
+# The name of the gunicorn process. For the following gunicorn server ...
+#
+#    gunicorn --name my_web_app my_web_app_config.ini
+#
+#  ... we'd use the name `my_web_app`.
+#
+# - proc_name: my_web_app
+
+include_recipe 'datadog::dd-agent'
+
+datadog_monitor 'gunicorn' do
+  instances node['datadog']['gunicorn']['instances']
+end

spec/integrations/gunicorn_spec.rb

@@ -0,0 +1,39 @@
+describe 'datadog::gunicorn' do
+  expected_yaml = <<-EOF
+    init_config:
+
+    instances:
+    - proc_name: my_web_app
+  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',
+        gunicorn: {
+          instances: [
+            {
+              proc_name: 'my_web_app'
+            }
+          ]
+        }
+      }
+    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('gunicorn') }
+
+  it 'renders expected YAML config file' do
+    expect(chef_run).to render_file('/etc/dd-agent/conf.d/gunicorn.yaml').with_content { |content|
+      expect(YAML.load(content).to_json).to be_json_eql(YAML.load(expected_yaml).to_json)
+    }
+  end
+end

templates/default/gunicorn.yaml.erb

@@ -0,0 +1,13 @@
+instances:
+<% @instances.each do |i| -%>
+  - proc_name: <%= i['proc_name'] %>
+  <% if i.key?('tags') -%>
+    tags:
+    <% i['tags'].each do |t| -%>
+    - <%= t %>
+    <% end -%>
+  <% end -%>
+<% end -%>
+
+# Nothing to configure here
+init_config: