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<div id="preamble"><h1>Module Apache mod_heartbeat</h1>
<div class="toplang">
<p><span>Langues Disponibles: </span><a href="../en/mod/mod_heartbeat.html" hreflang="en" rel="alternate" title="English">&nbsp;en&nbsp;</a> |
<a href="../fr/mod/mod_heartbeat.html" title="Français">&nbsp;fr&nbsp;</a></p>
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<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Envoie des messages d'état au mandataire frontal</td></tr>
<tr><th><a href="module-dict.html#Status">Statut:</a></th><td>Expérimental</td></tr>
<tr><th><a href="module-dict.html#ModuleIdentifier">Identificateur de Module:</a></th><td>heartbeat_module</td></tr>
<tr><th><a href="module-dict.html#SourceFile">Fichier Source:</a></th><td>mod_heartbeat</td></tr>
<tr><th><a href="module-dict.html#Compatibility">Compatibilité:</a></th><td>Disponible à partir de la version 2.3
du serveur HTTP Apache</td></tr></table>
<h3>Sommaire</h3>

    <p><code class="module"><a href="../mod/mod_heartbeat.html">mod_heartbeat</a></code> envoie à un moniteur
    <code class="module"><a href="../mod/mod_heartmonitor.html">mod_heartmonitor</a></code> des messages multicast l'informant
    du nombre de connexions courantes. En général,
    <code class="module"><a href="../mod/mod_heartmonitor.html">mod_heartmonitor</a></code> est chargé sur un serveur
    mandataire où <code class="module"><a href="../mod/mod_lbmethod_heartbeat.html">mod_lbmethod_heartbeat</a></code> est chargé, ce
    qui permet d'utiliser la <em>lbmethod</em> "heartbeat" au sein des
    directives <code class="directive"><a href="../mod/mod_proxy.html#proxypass">ProxyPass</a></code>.</p>

    <p>
    Le module <code class="module"><a href="../mod/mod_heartbeat.html">mod_heartbeat</a></code> est chargé sur le
    serveur d'origine qui sert les requêtes via le
    serveur mandataire.
</p>

    <div class="warning">
        Pour utiliser <code class="module"><a href="../mod/mod_heartbeat.html">mod_heartbeat</a></code>,
	<code class="module"><a href="../mod/mod_status.html">mod_status</a></code> et <code class="module"><a href="../mod/mod_watchdog.html">mod_watchdog</a></code>
	doivent être soit des modules statiques, soit des modules
	dynamiques, et dans ce dernier cas, ils doivent être chargés
	avant <code class="module"><a href="../mod/mod_heartbeat.html">mod_heartbeat</a></code>.
    </div>

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<div id="quickview"><h3 class="directives">Directives</h3>
<ul id="toc">
<li><img alt="" src="../images/down.gif" /> <a href="#heartbeataddress">HeartbeatAddress</a></li>
</ul>
<h3>Sujets</h3>
<ul id="topics">
<li><img alt="" src="../images/down.gif" /> <a href="#consuming">Utilisation de la sortie de mod_heartbeat</a></li>
</ul><ul class="seealso"><li><a href="#comments_section">Commentaires</a></li></ul></div>
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<div class="section">
<h2><a name="consuming" id="consuming">Utilisation de la sortie de mod_heartbeat</a></h2>
    
  <p>
      Chaque seconde, ce module génère un paquet multicast UDP contenant
      le nombre de threads/processus occupés et en attente. Le paquet
      possède un format ASCII simple similaire aux paramètres de requête
      GET en HTTP.
  </p>

<div class="example"><h3>Exemple de paquet</h3><p><code>
v=1&amp;ready=75&amp;busy=0
</code></p></div>

  <p>
    Les utilisateurs disposeront dans le futur de nouvelles variables en
    plus de busy et ready, et toujours séparées par des '&amp;'.
  </p>

</div>
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<div class="directive-section"><h2><a name="HeartbeatAddress" id="HeartbeatAddress">HeartbeatAddress</a> <a name="heartbeataddress" id="heartbeataddress">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Adresse multicast à laquelle envoyer les requêtes
heartbeat</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntaxe:</a></th><td><code>HeartbeatAddress <var>addr:port</var></code></td></tr>
<tr><th><a href="directive-dict.html#Default">Défaut:</a></th><td><code>disabled</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Contexte:</a></th><td>configuration du serveur</td></tr>
<tr><th><a href="directive-dict.html#Status">Statut:</a></th><td>Expérimental</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_heartbeat</td></tr>
</table>
    <p>La directive <code class="directive">HeartbeatAddress</code> permet de
    spécifier l'adresse multicast à laquelle <code class="module"><a href="../mod/mod_heartbeat.html">mod_heartbeat</a></code> va
    envoyer ses informations. En général, cette adresse correspond à la
    valeur définie par la directive  <code class="directive"><a href="../mod/mod_heartmonitor.html#heartbeatlisten">HeartbeatListen</a></code> sur le serveur
    mandataire frontal.</p>
    <pre class="prettyprint lang-config">HeartbeatAddress 239.0.0.1:27999</pre>


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