Add support to extra_config on process_config section

Author: p-lambert

spec/dd-agent_spec.rb

@@ -1001,6 +1001,67 @@ def set_env_var(name, value)
           end
         end
       end
+
+      context 'with extra_config params set' do
+        cached(:chef_run) do
+          ChefSpec::SoloRunner.new(
+            platform: 'ubuntu',
+            version: '14.04'
+          ) do |node|
+            node.name 'chef-nodename' # expected to be used as the hostname in `datadog.yaml`
+            node.normal['datadog'] = {
+              'api_key' => 'somethingnotnil',
+              'agent6' => true,
+              'extra_config' => {
+                'secret_backend_command' => '/sbin/local-secrets',
+                'process_config' => {
+                  'custom_param' => 'somethingnotnil'
+                }
+              }
+            }
+          end.converge described_recipe
+        end
+
+        it 'is created' do
+          expect(chef_run).to create_template('/etc/datadog-agent/datadog.yaml')
+        end
+
+        it 'contains expected YAML configuration' do
+          expected_yaml = <<-EOF
+            api_key: somethingnotnil
+            tags: []
+            use_dogstatsd: true
+            bind_host: localhost
+            additional_endpoints: {}
+            secret_backend_command: /sbin/local-secrets
+            histogram_aggregates:
+              - "max"
+              - "median"
+              - "avg"
+              - "count"
+            histogram_percentiles:
+              - "0.95"
+            hostname: "chef-nodename"
+            log_file: "/var/log/datadog/agent.log"
+            log_level: "INFO"
+            dogstatsd_non_local_traffic: false
+            apm_config:
+              apm_non_local_traffic: false
+            process_config:
+              enabled: "false"
+              blacklist_patterns: []
+              scrub_args: true
+              custom_sensitive_words: []
+              intervals: {}
+              process_dd_url: "https://process.datadoghq.com"
+              custom_param: somethingnotnil
+            EOF
+
+          expect(chef_run).to(render_file('/etc/datadog-agent/datadog.yaml').with_content { |content|
+            expect(YAML.safe_load(content).to_json).to be_json_eql(YAML.safe_load(expected_yaml).to_json)
+          })
+        end
+      end
     end
 
     describe 'agent version set' do

templates/default/datadog.yaml.erb

@@ -93,22 +93,6 @@ agent_config = @extra_config.merge({
 
   # log agent options
   logs_enabled: node['datadog']['enable_logs_agent'],
-
-  # process agent options
-  process_config: {
-    enabled: process_agent_enabled,
-    log_file: node['datadog']['process_agent']['log_file'],
-    intervals: {
-      container: node['datadog']['process_agent']['container_interval'],
-      container_realtime: node['datadog']['process_agent']['rtcontainer_interval'],
-      process: node['datadog']['process_agent']['rtcontainer_interval'],
-      process_realtime: node['datadog']['process_agent']['rtprocess_interval'],
-    },
-    blacklist_patterns: node['datadog']['process_agent']['blacklist'],
-    scrub_args: node['datadog']['process_agent']['scrub_args'],
-    custom_sensitive_words: node['datadog']['process_agent']['custom_sensitive_words'],
-    process_dd_url: node['datadog']['process_agent']['url']
-  }
 })
 
 if node['datadog']['statsd_forward_host']
@@ -142,6 +126,28 @@ if !http_proxy.nil?
   agent_config['proxy']['no_proxy'] = no_proxy if !no_proxy.nil?
 end
 
+## Process agent options ##
+process_config = {
+  enabled: process_agent_enabled,
+  log_file: node['datadog']['process_agent']['log_file'],
+  intervals: {
+    container: node['datadog']['process_agent']['container_interval'],
+    container_realtime: node['datadog']['process_agent']['rtcontainer_interval'],
+    process: node['datadog']['process_agent']['rtcontainer_interval'],
+    process_realtime: node['datadog']['process_agent']['rtprocess_interval'],
+  },
+  blacklist_patterns: node['datadog']['process_agent']['blacklist'],
+  scrub_args: node['datadog']['process_agent']['scrub_args'],
+  custom_sensitive_words: node['datadog']['process_agent']['custom_sensitive_words'],
+  process_dd_url: node['datadog']['process_agent']['url']
+}
+
+# Take into account options defined under ['extra_config']['process_config']
+process_config = @extra_config['process_config'].merge(process_config) unless @extra_config['process_config'].nil?
+agent_config[:process_config] = process_config
+agent_config[:process_config][:intervals].reject!{ |k,v| v.nil? }
+agent_config[:process_config].reject!{ |k,v| v.nil? }
+
 ## Trace agent options ##
 apm_config = {
   enabled: node['datadog']['enable_trace_agent'],
@@ -156,10 +162,7 @@ apm_config.reject!{ |k,v| v.nil? }
 apm_config = @extra_config['apm_config'].merge(apm_config) unless @extra_config['apm_config'].nil?
 agent_config[:apm_config] = apm_config
 
-
 # Remove nil values
-agent_config[:process_config][:intervals].reject!{ |k,v| v.nil? }
-agent_config[:process_config].reject!{ |k,v| v.nil? }
 agent_config.reject!{ |k,v| v.nil? }
 
 -%>