diff --git a/doc/file.README.html b/doc/file.README.html
index 959bfe6..4c3e8f6 100644
--- a/doc/file.README.html
+++ b/doc/file.README.html
@@ -76,6 +76,8 @@
 </li><li>
 <p><a href="#directories-files-and-services">Directories, Files and Services</a></p>
 </li><li>
+<p><a href="#nagios-monitoring">Nagios monitoring</a></p>
+</li><li>
 <p><a href="#optional">Optional</a></p>
 </li><li>
 <p><a href="#r10k-service">R10k service</a></p>
@@ -147,6 +149,17 @@
 <p>start services as required</p>
 </li></ul>
 
+<h3 id="label-Nagios+monitoring">Nagios monitoring</h3>
+
+<p>When <code>$pt_manage_nagios</code> is <code>true</code>, the module exports a Puppet agent check on every node and a Puppet Server check on the Puppet Server node. The target Nagios installation must provide the NRPE command alias used by the export. The Puppet Server check can use the standard <code>check_procs</code> plugin:</p>
+
+<pre class="code ruby"><code class="ruby">command[check_puppet_server]=/usr/lib64/nagios/plugins/check_procs -c $ARG1$ -a $ARG2$
+</code></pre>
+
+<p>With the exported command, <code>check_puppet_server!1:!puppetserver</code> alerts when no running process has <code>puppetserver</code> in its full command line. It does not check whether the systemd service is enabled.</p>
+
+<p>The modules <code>confdroid_nagios</code> and <code>confdroid_nrpe</code> include the proper commands already.</p>
+
 <h3 id="label-Optional">Optional</h3>
 
 <h4 id="label-R10k+service">R10k service</h4>
diff --git a/doc/index.html b/doc/index.html
index d71ce2c..3f56da6 100644
--- a/doc/index.html
+++ b/doc/index.html
@@ -76,6 +76,8 @@
 </li><li>
 <p><a href="#directories-files-and-services">Directories, Files and Services</a></p>
 </li><li>
+<p><a href="#nagios-monitoring">Nagios monitoring</a></p>
+</li><li>
 <p><a href="#optional">Optional</a></p>
 </li><li>
 <p><a href="#r10k-service">R10k service</a></p>
@@ -147,6 +149,17 @@
 <p>start services as required</p>
 </li></ul>
 
+<h3 id="label-Nagios+monitoring">Nagios monitoring</h3>
+
+<p>When <code>$pt_manage_nagios</code> is <code>true</code>, the module exports a Puppet agent check on every node and a Puppet Server check on the Puppet Server node. The target Nagios installation must provide the NRPE command alias used by the export. The Puppet Server check can use the standard <code>check_procs</code> plugin:</p>
+
+<pre class="code ruby"><code class="ruby">command[check_puppet_server]=/usr/lib64/nagios/plugins/check_procs -c $ARG1$ -a $ARG2$
+</code></pre>
+
+<p>With the exported command, <code>check_puppet_server!1:!puppetserver</code> alerts when no running process has <code>puppetserver</code> in its full command line. It does not check whether the systemd service is enabled.</p>
+
+<p>The modules <code>confdroid_nagios</code> and <code>confdroid_nrpe</code> include the proper commands already.</p>
+
 <h3 id="label-Optional">Optional</h3>
 
 <h4 id="label-R10k+service">R10k service</h4>
diff --git a/doc/puppet_classes/confdroid_puppet_3A_3Amonitoring_3A_3Atarget.html b/doc/puppet_classes/confdroid_puppet_3A_3Amonitoring_3A_3Atarget.html
index 59ba328..ea055f1 100644
--- a/doc/puppet_classes/confdroid_puppet_3A_3Amonitoring_3A_3Atarget.html
+++ b/doc/puppet_classes/confdroid_puppet_3A_3Amonitoring_3A_3Atarget.html
@@ -118,7 +118,24 @@
 20
 21
 22
-23</pre>
+23
+24
+25
+26
+27
+28
+29
+30
+31
+32
+33
+34
+35
+36
+37
+38
+39
+40</pre>
       </td>
       <td>
         <pre class="code"><span class="info file"># File 'manifests/monitoring/target.pp', line 6</span>
@@ -127,6 +144,7 @@ class confdroid_puppet::monitoring::target (
 
 ) inherits confdroid_puppet::params {
   if $pt_manage_nagios == true {
+    # puppet agent service
     @@nagios_service { &quot;check_puppet_${fqdn}&quot;:
       check_command       =&gt; &quot;check_nrpe!check_puppet!${pt_procs_allowed}!puppet&quot;,
       use                 =&gt; &#39;generic-service&#39;,
@@ -139,6 +157,22 @@ class confdroid_puppet::monitoring::target (
       mode                =&gt; &#39;0640&#39;,
       contacts            =&gt; $pt_target_contacts,
     }
+
+    if $fqdn == $pt_pm_fqdn {
+      # puppet server service
+      @@nagios_service { &quot;check_puppet_server_${fqdn}&quot;:
+        check_command       =&gt; &quot;check_nrpe!check_puppet_server!${pt_procs_allowed}!puppet&quot;,
+        use                 =&gt; &#39;generic-service&#39;,
+        host_name           =&gt; $fqdn,
+        notification_period =&gt; &#39;24x7&#39;,
+        service_description =&gt; &quot;${fqdn}_check_puppet_server&quot;,
+        target              =&gt; $pt_target_service,
+        owner               =&gt; &#39;nagios&#39;,
+        group               =&gt; &#39;nagios&#39;,
+        mode                =&gt; &#39;0640&#39;,
+        contacts            =&gt; $pt_target_contacts,
+      }
+    }
   }
 }</pre>
       </td>