[pgbouncer] Add recipe and tests

Author: DorianZaccaria

.kitchen.yml

@@ -266,6 +266,22 @@ suites:
               my_consumer:
                 my_topic: [0, 1, 4, 12]
 
+- name: datadog_pgbouncer
+  run_list:
+    - recipe[datadog::pgbouncer]
+  attributes:
+    datadog:
+      <<: *DATADOG
+      pgbouncer:
+        instances:
+          - host: localhost
+            port: 6432
+            username: john
+            password: doe
+            tags:
+              - toto
+              - tata
+
 - name: datadog_process
   run_list:
     - recipe[datadog::process]

recipes/pgbouncer.rb

@@ -0,0 +1,38 @@
+#
+# Cookbook Name:: datadog
+# Recipe:: pgbouncer
+#
+# Copyright 2011-2015, Datadog
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+include_recipe 'datadog::dd-agent'
+
+# Build a data structure with configuration.
+# @example
+#   node.override['datadog']['pgbouncer']['instances'] = [
+#     {
+#       host: 'localhost',
+#       port: '15432',
+#       username: 'john',
+#       password: 'doe',
+#       tags: [
+#         'optional_tag1',
+#         'optional_tag2'
+#       ]
+#     }
+#   ]
+
+datadog_monitor 'pgbouncer' do
+  instances node['datadog']['pgbouncer']['instances']
+end

templates/default/pgbouncer.yaml.erb

@@ -0,0 +1,6 @@
+# Generated by Chef, local modifications will be overwritten
+
+<%= JSON.parse(({ 'instances' => @instances }).to_json).to_yaml %>
+
+init_config:
+# Nothing to configure here

test/integration/datadog_pgbouncer/serverspec/Gemfile

@@ -0,0 +1 @@
+../../helpers/serverspec/Gemfile

test/integration/datadog_pgbouncer/serverspec/pgbouncer_spec.rb

@@ -0,0 +1,36 @@
+# Encoding: utf-8
+require 'json_spec'
+require 'serverspec'
+require 'yaml'
+
+set :backend, :exec
+set :path, '/sbin:/usr/local/sbin:$PATH'
+
+AGENT_CONFIG = '/etc/dd-agent/conf.d/pgbouncer.yaml'
+
+describe service('datadog-agent') do
+  it { should be_running }
+end
+
+describe file(AGENT_CONFIG) do
+  it { should be_a_file }
+
+  it 'is valid yaml matching input values' do
+    generated = YAML.load_file(AGENT_CONFIG)
+
+    expected = {
+      instances: [
+        {
+          host: 'localhost',
+          port: 6432,
+          username: 'john',
+          password: 'doe',
+          tags: ['toto', 'tata']
+        }
+      ],
+      init_config: nil
+    }
+
+    expect(generated.to_json).to be_json_eql expected.to_json
+  end
+end