Ensure Agent service is not running if experiment is running

Author: tbavelier

lib/facter/datadog_agent_exp_active.rb

@@ -0,0 +1,18 @@
+Facter.add(:datadog_agent_exp_active) do
+  confine kernel: 'Linux'
+  setcode do
+    active = false
+
+    # Determine via service manager when available
+    if Facter::Util::Resolution.which('systemctl')
+      active = system('systemctl is-active --quiet datadog-agent-exp')
+    elsif Facter::Util::Resolution.which('service')
+      active = system('service datadog-agent-exp status >/dev/null 2>&1')
+    elsif Facter::Util::Resolution.which('pgrep')
+      # Fallback: look for the experiment agent binary as the running command (exact path prefix)
+      active = system('pgrep -f "^/opt/datadog-packages/datadog-agent/experiment/bin/agent/agent( |$)" >/dev/null 2>&1')
+    end
+
+    active
+  end
+end

manifests/init.pp

@@ -507,9 +507,15 @@
   }
 
   # Declare service
+  if ($facts['os']['name'] != 'Windows' and $facts['datadog_agent_exp_active'] == true) {
+    $_service_ensure = 'stopped'
+  } else {
+    $_service_ensure = $service_ensure
+  }
+
   class { 'datadog_agent::service' :
     agent_flavor     => $agent_flavor,
-    service_ensure   => $service_ensure,
+    service_ensure   => $_service_ensure,
     service_enable   => $service_enable,
     service_provider => $service_provider,
   }