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<h1 class="topictitle1">Set up a cluster using clustering CL commands for HTTP Server</h1>
<div><p>This topic provides information about how to set up a cluster using
a 5250 session.</p>
<div class="important"><span class="importanttitle">Important:</span> Information
for this topic supports the latest PTF levels for HTTP Server for i5/OS .
It is recommended that you install the latest PTFs to upgrade to the latest
level of the HTTP Server for i5/OS. Some of the topics documented here are
not available prior to this update. See <a href="http://www-03.ibm.com/servers/eserver/iseries/software/http/services/service.html" target="_blank">http://www.ibm.com/servers/eserver/iseries/software/http/services/service.htm</a> <img src="www.gif" alt="Link outside Information Center" /> for more information. </div>
<p>Set up your highly available HTTP Server instance using the clustering
CL commands. Before using the following commands, see <a href="../rzaig/rzaigicclust.htm">Clusters</a> for
more information. </p>
<p>The following is a subset of the Clustering CL commands that can be used
to perform clustering operations. See <a href="rzaieclcommands.htm">CL commands for HTTP Server</a> for
more information. </p>
<p>To create a cluster, use the following CL command: </p>
<dl class="block"><dt class="dlterm"><a href="../cl/crtclu.htm">CRTCLU</a></dt>
<dd><strong>Create Cluster</strong> creates a new cluster for one or more nodes. </dd>
</dl>
<p>To add nodes to an existing cluster, use the following CL command:</p>
<dl class="block"><dt class="dlterm"><a href="../cl/addclunode.htm">ADDCLUNODE</a> </dt>
<dd><strong>Add Cluster Node Entry</strong> adds a node to the membership list of an
existing cluster. </dd>
</dl>
<p>To start a node in the cluster, use the following CL command: </p>
<dl class="block"><dt class="dlterm"><a href="../cl/strclunod.htm">STRCLUNOD </a></dt>
<dd><strong>Start Cluster Node</strong> starts Clusters Resource Services on a node
in the cluster.<div class="note"><span class="notetitle">Note:</span> It is suggested that you start a new cluster node from
a node that is already active. </div>
</dd>
</dl>
<p>To determine the status of a node in a the cluster, use the following CL
command: </p>
<dl class="block"><dt class="dlterm"><a href="../cl/dspcluinf.htm">DSPCLUINF </a></dt>
<dd><strong>Display Cluster</strong> Information displays the status of a node in a
cluster. All nodes should be in the <em>Active</em> state.</dd>
</dl>
<p>To perform a swtichover in the case of a Primary/Backup configuration,
use the following CL command: </p>
<dl class="block"><dt class="dlterm"><a href="../cl/chgcrgpri.htm">CHGCRGPRI</a> </dt>
<dd><strong>Change Cluster Resource Group Primary</strong> performs an administrative
switchover of the cluster resource group by changing the current roles of
nodes in the recovery domain. </dd>
</dl>
<p>To remove a node from a cluster, use the following CL command: </p>
<dl class="block"><dt class="dlterm"><a href="../cl/rmvclunode.htm">RMVCLUNODE</a> </dt>
<dd><strong>Remove Cluster Node Entry</strong> removes a node from a cluster. </dd>
</dl>
<p>For more information on Clusters, see Clustering troubleshooting.</p>
<p> For instructions on how to set up a highly available Web
server, see <a href="rzaieconfigha.htm">Set up and administration of a highly available Web server cluster on HTTP Server (powered by Apache)</a>.</p>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="rzaieparhttp.htm" title="This topic provides step-by-step tasks for HTTP Server.">HTTP Server tasks</a></div>
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