Add supervisord integration config files

manifests/integrations/supervisord.pp

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+# Class: datadog_agent::integrations::supervisord
+#
+# This class will install the necessary configuration for the supervisord integration
+#
+# Parameters:
+#   servername
+#   socket
+#       Optional. The socket on which supervisor listen for HTTP/XML-RPC requests. 
+#   hostname
+#       Optional. The host where supervisord server is running. 
+#   port
+#       Optional. The port number.
+#   username
+#   password
+#       If your service uses basic authentication, you can optionally
+#       specify a username and password that will be used in the check.
+#   proc_names
+#       Optional. The process to monitor within this supervisord instance.
+#       If not specified, the check will monitor all processes. 
+#   server_check
+#       Optional. Service check for connections to supervisord server.
+#
+#
+# Sample Usage:
+#
+# class { 'datadog_agent::integrations::supervisord':
+#   instances => [
+#     {
+#       servername => 'server0',
+#       socket     => 'unix:///var/run//supervisor.sock',
+#     },
+#     {
+#       servername => 'server1',
+#       hostname   => 'localhost',
+#       port       => '9001',
+#       proc_names => ['java', 'apache2'],
+#     },
+#   ],
+# }
+#
+#
+#
+
+class datadog_agent::integrations::supervisord (
+  $instances    = [{'servername' => 'server0', 'hostname' => 'localhost', 'port' => '9001'}],
+) inherits datadog_agent::params {
+  include datadog_agent
+
+  file { "${datadog_agent::params::conf_dir}/supervisord.yaml":
+    ensure  => file,
+    owner   => $datadog_agent::params::dd_user,
+    group   => $datadog_agent::params::dd_group,
+    mode    => '0600',
+    content => template('datadog_agent/agent-conf.d/supervisord.yaml.erb'),
+    require => Package[$datadog_agent::params::package_name],
+    notify  => Service[$datadog_agent::params::service_name]
+  }
+}

spec/classes/datadog_agent_integrations_supervisrd_spec.rb

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+require 'spec_helper'
+
+describe 'datadog_agent::integrations::supervisord' do
+  let(:facts) {{
+    operatingsystem: 'Ubuntu',
+  }}
+  let(:conf_dir) { '/etc/dd-agent/conf.d' }
+  let(:dd_user) { 'dd-agent' }
+  let(:dd_group) { 'root' }
+  let(:dd_package) { 'datadog-agent' }
+  let(:dd_service) { 'datadog-agent' }
+  let(:conf_file) { "#{conf_dir}/supervisord.yaml" }
+
+  it { should compile.with_all_deps }
+  it { should contain_file(conf_file).with(
+    owner: dd_user,
+    group: dd_group,
+    mode: '0600',
+  )}
+  it { should contain_file(conf_file).that_requires("Package[#{dd_package}]") }
+  it { should contain_file(conf_file).that_notifies("Service[#{dd_service}]") }
+
+  context 'with default parameters' do
+    it { should contain_file(conf_file).with_content(%r{name: server0\s+host: localhost\s+port: 9001}) }
+  end
+
+  context 'with one supervisord' do
+    context 'without processes' do
+      let(:params) {{
+        instances: [
+          {
+            'servername' => 'server0',
+            'socket'     => 'unix://var/run/supervisor.sock',
+          },
+        ]
+      }}
+      it { should contain_file(conf_file).with_content(%r{name: server0\s+socket: unix://var/run/supervisor.sock}) }
+    end
+    context 'with processes' do
+      let(:params) {{
+        instances: [
+          {
+            'servername' => 'server0',
+            'socket'     => 'unix://var/run/supervisor.sock',
+            'proc_names' => %w{ java apache2 },
+          },
+        ]
+      }}
+      it { should contain_file(conf_file).with_content(%r{name: server0\s+socket: unix://var/run/supervisor.sock\s+proc_names:\s+- java\s+- apache2}) }
+    end
+  end
+
+  context 'with multiple supervisord' do
+    context 'without processes parameter array' do
+      let(:params) {{
+        instances: [
+          {
+            'servername' => 'server0',
+            'socket'   => 'unix://var/run/supervisor.sock',
+          },
+          {
+            'servername' => 'server1',
+            'hostname'   => 'localhost',
+            'port'       => '9001',
+          },
+        ]
+      }}
+      it { should contain_file(conf_file).with_content(%r{name: server0\s+socket: unix://var/run/supervisor.sock}) }
+      it { should contain_file(conf_file).with_content(%r{name: server1\s+host: localhost\s+port: 9001}) }
+    end
+    context 'with processes parameter array' do
+      let(:params) {{
+        instances: [
+          {
+            'servername' => 'server0',
+            'socket'     => 'unix://var/run/supervisor.sock',
+            'proc_names' => %w{ webapp nginx },
+          },
+          {
+            'servername' => 'server1',
+            'hostname'   => 'localhost',
+            'port'       => '9001',
+            'proc_names' => %w{ java apache2 },
+          },
+        ]
+      }}
+      it { should contain_file(conf_file).with_content(%r{name: server0\s+socket: unix://var/run/supervisor.sock\s+proc_names:\s+- webapp\s+- nginx}) }
+      it { should contain_file(conf_file).with_content(%r{name: server1\s+host: localhost\s+port: 9001\s+proc_names:\s+- java\s+- apache2}) }
+    end
+  end
+end

templates/agent-conf.d/supervisord.yaml.erb

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+#
+#   There are two ways to get started with the supervisord check.
+#
+#   You can configure inet_http_server in /etc/supervisord.conf. Below is an
+#   example inet_http_server configuration:
+#
+#       [inet_http_server]
+#       port:localhost:9001
+#       username:user  # optional
+#       password:pass  # optional
+#
+#   OR, you can use supervisorctl socket to communicate with supervisor.
+#   If supervisor is running as root, make sure chmod property is set
+#   to a permission accessible to non-root users. See the example below:
+#
+#       [supervisorctl]
+#       serverurl=unix:///var/run//supervisor.sock
+#
+#       [unix_http_server]
+#       file=/var/run/supervisor.sock
+#       chmod=777
+#
+#  Reload supervisor, specify the inet or unix socket server information
+#  in this yaml file along with an optional list of the processes you want
+#  to monitor per instance, and you're good to go!
+#
+#  See http://supervisord.org/configuration.html for more information on
+#  configuring supervisord sockets and inet http servers.
+#
+
+#   - name: server0    # Required. An arbitrary name to identify the supervisord server
+#     host: localhost  # Optional. Defaults to localhost. The host where supervisord server is running
+#     port: 9001       # Optional. Defaults to 9001. The port number.
+#     user: user       # Optional. Required only if a username is configured.
+#     pass: pass       # Optional. Required only if a password is configured.
+#     proc_regex:      # Optional. Regex pattern[s] matching the names of processes to monitor
+#      - 'myprocess-\d\d$'
+#     proc_names:      # Optional. The process to monitor within this supervisord instance.
+#      - apache2       #           If not specified, the check will monitor all processes.
+#      - webapp
+#      - java
+#   - name: server1
+#     host: localhost
+#     port: 9002
+#   - name: server2
+#     socket: unix:///var/run//supervisor.sock
+#     host: http://127.0.0.1        # Optional. Defaults to http://127.0.0.1
+
+
+init_config:
+
+instances:
+<%- (Array(@instances)).each do |instance| -%>
+    -   name: <%= instance['servername'] %>
+<% if instance['socket'] -%>
+        socket: <%= instance['socket'] %>
+<% end -%>
+<% if instance['hostname'] -%>
+        host: <%= instance['hostname'] %>
+<% end -%>
+<% if instance['port'] -%>
+        port: <%= instance['port'] %>
+<% end -%>
+<% if instance['username'] -%>
+        user: <%= instance['username'] %>
+<% end -%>
+<% if instance['password'] -%>
+        pass: <%= instance['password'] %>
+<% end -%>
+<% if instance['proc_names'] and ! instance['proc_names'].empty? -%>
+        proc_names:
+  <%- Array(instance['proc_names']).each do |proc_name| -%>
+    <%- if proc_name != '' -%>
+         - <%= proc_name %>
+    <%- end -%>
+  <%- end -%>
+<% end -%>
+<% if instance['server_check'] -%>
+        server_check: <%= instance['server_check'] %>
+<% end -%>
+<% end -%>