Detailed exercice protocol

Doc/Sdi/surveillance.xml

@@ -7,7 +7,7 @@
          xmlns:m="http://www.w3.org/1998/Math/MathML"
          xmlns:html="http://www.w3.org/1999/xhtml"
          xmlns:db="http://docbook.org/ns/docbook">
-  <title> Systems surveillance</title>
+  <title>Systems surveillance</title>
 
   <section xml:id="sdiSectNagios">
     <title>Working with <productname>Nagios</productname></title>
@@ -46,7 +46,8 @@
         <para>Configure your first VM as a host to be monitored according to
         <link
         xlink:href="http://nagios.sourceforge.net/docs/nagioscore/3/en/objectdefinitions.html#host">Host
-        Definition</link>.</para>
+        Definition</link>. Start with <quote>host is alive</quote> not yet
+        requiring any service definition.</para>
 
         <para>You may want to choose low values for
         <option>check_interval</option>, <option>retry_interval</option>, and
@@ -58,25 +59,76 @@
         <para>Configure a service testing for <xref linkend="glo_HTTP"/>
         reachability. Then shut down your Apache Process and consult your
         <quote>tactical overview</quote>.</para>
+
+        <orderedlist>
+          <listitem>
+            <para>Configure a service testing for <xref linkend="glo_HTTP"/>
+            reachability.</para>
+          </listitem>
+
+          <listitem>
+            <para>consult your <quote>tactical overview</quote>. Your new
+            check should transition from <quote>pending</quote> state to
+            <quote>O.K</quote>.</para>
+          </listitem>
+
+          <listitem>
+            <para>Shut down the apache 2 service on your remote host and watch
+            the state transition from <quote>O.K</quote> to .</para>
+          </listitem>
+        </orderedlist>
+
+        <tip>
+          <itemizedlist>
+            <listitem>
+              <para><filename>/usr/share/nagios-plugins/templates-basic/http.cfg</filename>
+              belonging to the package <package>nagios-plugins-basic</package>
+              defines a suitable <command>check_http</command> command.</para>
+            </listitem>
+
+            <listitem>
+              <para>The current and subsequent service definitions may be
+              added to the host configuration file.</para>
+            </listitem>
+          </itemizedlist>
+        </tip>
       </listitem>
 
       <listitem>
-        <para>Configure service testing for <xref linkend="glo_LDAP"/> based
-        authenticated <code>https</code> access. </para>
+        <para>Check the remote machine's internal parameters (disk usage,
+        system load,..) using the <productname
+        xlink:href="http://nagios.sourceforge.net/docs/nagioscore/3/en/addons.html#nrpe">Nrpe</productname>
+        plugin. This essential means defining your
+        <productname>Nagios</productname> server's <code>localhost</code>
+        checks for your remote machine as well.</para>
       </listitem>
 
       <listitem>
-        <para>Check the remote <xref linkend="glo_HTTP"/> service by using a
-        <productname
-        xlink:href="http://nagios.sourceforge.net/docs/nagioscore/3/en/addons.html#nrpe">Nrpe</productname>
-        plugin.</para>
+        <para>Configure service testing for (<xref linkend="glo_LDAP"/> based)
+        authenticated <code>https</code> access.</para>
+
+        <tip>
+          <para><command>/usr/lib/nagios/plugins/check_http</command>
+          <option>--help</option> will show you <option>-a</option> /
+          <option>--authorization</option> option requiring appropriate
+          parameters. This is being used in the
+          <command>check_https_auth</command> definition being part of
+          <filename>/usr/share/nagios-plugins/templates-basic/http.cfg</filename>.
+          </para>
+        </tip>
+      </listitem>
+
+      <listitem>
+        <para>Check the remote machine's internally accessible <xref
+        linkend="glo_LDAP"/> Server using <productname
+        xlink:href="http://nagios.sourceforge.net/docs/nagioscore/3/en/addons.html#nrpe">Nrpe</productname>.</para>
       </listitem>
 
       <listitem>
         <para>Authentication will not work when the host's <xref
-        linkend="glo_LDAP"/> server is down. So checking for authentication
-        should be deferred if <xref linkend="glo_LDAP"/> is not available.
-        Configure an appropriate <link
+        linkend="glo_LDAP"/> server is down. So authentication related
+        warnings should be deferred until <xref linkend="glo_LDAP"/> becomes
+        available. Configure an appropriate <link
         xlink:href="http://nagios.sourceforge.net/docs/nagioscore/3/en/dependencies.html"><productname>Nagios</productname>
         dependency</link>.</para>
       </listitem>