232 lines
14 KiB
HTML
232 lines
14 KiB
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<meta name="copyright" content="(C) Copyright IBM Corporation 2005" />
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<meta name="DC.Title" content="Shutting down Linux servers" />
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<meta name="abstract" content="This topic discusses the multiple methods to shut down integrated Linux servers." />
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<meta name="description" content="This topic discusses the multiple methods to shut down integrated Linux servers." />
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<title>Shutting down Linux servers</title>
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</head>
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<body id="rzau9shutdownlinux"><a name="rzau9shutdownlinux"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Shutting down Linux servers</h1>
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<div><p>This topic discusses the multiple methods to shut down integrated Linux<sup>®</sup> servers.</p>
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<div class="section"><p>Just as starting Linux servers can be accomplished in multiple
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ways, so can stopping Linux servers. In this section we cover ways to shut
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down Linux servers,
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and unique situations that arise in an integrated environment.</p>
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<p>You must
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shut down your Linux servers before performing <span class="keyword">i5/OS™</span> system
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tasks such as:</p>
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<ul><li>Backing up statically linked storage spaces. Statically linked storage
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spaces can only be backed up when Linux servers are shut down.</li>
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<li>Putting an <span class="keyword">i5/OS</span> partition
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into restricted state. When you end <span class="keyword">i5/OS</span> to
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restricted state, the iSeries™ can only be accessed through the console.
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If you put your iSeries into
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restricted state by ending all subsystems immediately, your integrated Linux servers
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are not automatically shut down. Because you normally put <span class="keyword">i5/OS</span> into
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restricted state to perform a backup, you need to shut down the Linux servers
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in order to back up their components. If a server is running, components such
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as storage spaces are locked, and excluded from the back up. Therefore, you
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should shut down your integrated servers in a controlled manner before putting <span class="keyword">i5/OS</span> into restricted state.</li>
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<li>Performing a complete system backup. Performing a complete system save
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using option 21 on the Save menu is an easy way to ensure that you have a
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complete backup of your iSeries system, including your integrated Linux servers.
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Option 21 on the Save menu has an option that allows you to automatically
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shut down integrated servers before starting a backup. To set this option:<ol><li>Type go save on the <span class="keyword">i5/OS</span> command
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line. Press <span class="uicontrol">Enter</span>.</li>
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<li>Type <kbd class="userinput">21</kbd>, press <span class="uicontrol">Enter</span>.</li>
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<li>You see the Save the Entire System display. Press <span class="uicontrol">Enter</span>.</li>
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<li>On the Specify Command Defaults display there is an option called “Vary
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off network servers”. This option defaults to <var class="varname">*NONE</var>, which
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does not shut down integrated servers. To ensure that integrated Linux servers
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are shut down before the backup starts, specify <kbd class="userinput">*ALL</kbd>.</li>
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<li>Fill out the other options. Press <span class="uicontrol">Enter</span> to start
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the backup.</li>
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</ol>
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</li>
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<li>Powering down the iSeries. It is strongly recommend that you shut down
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your servers in a controlled manner before powering down the iSeries using
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the Power Down System (PWRDWNSYS) command. </li>
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</ul>
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<div class="important"><span class="importanttitle">Important:</span> Always shut down your integrated Linux servers
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before you put <span class="keyword">i5/OS</span> into
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restricted state, and prior to powering down the iSeries. Otherwise you might lose data
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or corrupt the Linux operating system.</div>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzau9400op.htm" title="This topic introduces i5/OS operations.">i5/OS operations</a></div>
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</div>
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</div><div class="nested1" xml:lang="en-us" id="rzau9shutdownlinuxinav"><a name="rzau9shutdownlinuxinav"><!-- --></a><h2 class="topictitle2">Shut down a single Linux server using iSeries Navigator</h2>
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<div><div class="section">To shut down a single Linux server using iSeries Navigator:</div>
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<ol><li><span>Click <span class="uicontrol">Servers</span> under <strong>Integrated Server
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Administration</strong>.</span></li>
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<li><span>Right-click the server you wish to shut down.</span></li>
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<li><span>Select <span class="uicontrol">Shut Down</span> or <span class="uicontrol">Shut Down
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and Restart</span>.</span></li>
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<li><span>You see a shut down confirmation window. Click <span class="uicontrol">Shut
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Down</span>.</span></li>
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</ol>
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<div class="section">After a few moments you should see the server status change to <tt class="msgph">Shutting
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down</tt>. The status automatically changes to <tt class="msgph">Shut down</tt> when
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the server is completely shut down. You do not need to refresh the window.</div>
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</div>
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</div>
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<div class="nested1" xml:lang="en-us" id="rzau9shutdownlinuxinavmult"><a name="rzau9shutdownlinuxinavmult"><!-- --></a><h2 class="topictitle2">Shut down multiple Linux servers using iSeries Navigator</h2>
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<div><div class="section"><p>To shut down all integrated servers simultaneously select one
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of the following methods:</p>
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<ul><li>Right-click Servers in the left pane and select <span class="uicontrol">Shut down all</span>.</li>
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<li>Click <span class="uicontrol">Shut down all integrated servers</span> in the Taskpad
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pane.</li>
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</ul>
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<p>To shut down selected servers simultaneously, hold down the control
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key (Ctrl) and click each of the servers you want shut down. Then right-click
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one of the selected servers and click <span class="uicontrol">Shut down</span>. </p>
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<p>Because
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of interdependencies between servers, you might wish to shut down the servers
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in a specific order. If you want to do this automatically, see <a href="#rzau9shutdownlinuxcl">Shut down a single Linux servers using CL commands</a>.</p>
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</div>
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</div>
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</div>
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<div class="nested1" xml:lang="en-us" id="rzau9shutdownlinuxcl"><a name="rzau9shutdownlinuxcl"><!-- --></a><h2 class="topictitle2">Shut down a single Linux servers using CL commands</h2>
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<div><div class="section"><p>To shut down a single Linux server from an <span class="keyword">i5/OS</span> command
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line, select one of the following CL commands.</p>
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<dl><dt class="dlterm">WRKCFGSTS</dt>
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<dd><ol><li>1. Type <kbd class="userinput">WRKCFGSTS *NWS</kbd>. Press <span class="uicontrol">Enter</span>.</li>
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<li>Type <kbd class="userinput">2</kbd> in the Opt column next to the network server
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description (NWSD) that you want to vary off. Press <span class="uicontrol">Enter</span>.</li>
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</ol>
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<p>To shut down multiple Linux servers using the WRKCFGSTS command,
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simply type <kbd class="userinput">2</kbd> in the Opt column next to all the network
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server descriptions (NWSDs) that you want to vary off. Press <span class="uicontrol">Enter</span>.</p>
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</dd>
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</dl>
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<dl><dt class="dlterm">VRYCFG</dt>
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<dd><ol><li>Type <kbd class="userinput">VRYCFG</kbd>. Press <span class="uicontrol">F4</span>.</li>
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<li>Enter the following parameters:<ul><li>The NWSD that you want to vary off.</li>
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<li>The status: <kbd class="userinput">*OFF</kbd>. </li>
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</ul>
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</li>
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<li>Press <span class="uicontrol">Enter</span>.</li>
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</ol>
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<p>Here is an example:</p>
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<pre>VRYCFG CFGOBJ(nwsd-name) CFGTYPE(*NWS) STATUS(*OFF)</pre>
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<p>To
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shut down multiple Linux servers using the VRYCFG command, simply list
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all the network server descriptions (NWSDs) that you want to vary off in the
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CFGOBJ parameter. Press <span class="uicontrol">Enter</span>. For example:</p>
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<pre>VRYCFG CFGOBJ(nwsd-name1 nwsd-name2 nwsd-name3) CFGTYPE(*NWS) STATUS(*OFF)</pre>
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</dd>
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</dl>
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</div>
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</div>
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</div>
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<div class="nested1" xml:lang="en-us" id="rzau9shuddownlinuxcon"><a name="rzau9shuddownlinuxcon"><!-- --></a><h2 class="topictitle2">Shut down Linux servers from the Linux console</h2>
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<div><div class="section"><p>Every Linux server can be shut down from the Linux console
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by entering the command <strong>shutdown -h now</strong>. The Linux operating
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system shuts down but the NWSD is still considered to be varied on.</p>
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<p>The
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WRKCFGSTS command shows the NWSD with a status of SHUTDOWN, and the status
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of the communications objects under it are FAILED. This is normal for servers
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that are shut down from the console. On the WRKCFGSTS *NWS display you can
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enter a <kbd class="userinput">2</kbd> next to the NWSD to complete the vary off. </p>
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<p>You
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can also shut down and restart an integrated Linux server from the console by entering
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the appropriate command. You often need to restart the server after installing
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new software or reconfiguring the operating system. In this case you do not
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need to restart Linux from the <span class="keyword">i5/OS</span> side.</p>
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</div>
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</div>
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</div>
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<div class="nested1" xml:lang="en-us" id="rzau9shutdownxservercon"><a name="rzau9shutdownxservercon"><!-- --></a><h2 class="topictitle2">Shut down xSeries servers from the Linux console</h2>
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<div><div class="section"><p>Shutting down a Linux server that is running on an Integrated xSeries<sup>®</sup> Adapter-attached xSeries from
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the Linux console
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is a special case. In this case you should not shut Linux down through
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the Linux console.
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The reason for this is that when you shut down an integrated Linux server
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in this way, the xSeries server is turned off completely. This causes
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the Integrated xSeries Adapter
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to lose power and stop communicating over the HSL loop. The System Licensed
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Internal Code (SLIC) on the iSeries interprets this as one of its towers (the
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Integrated xSeries Adapter-attached xSeries in
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this case) having been turned off, and removed from the HSL loop. The iSeries goes
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into HSL recovery. The other iSeries towers in the loop should remain unaffected
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because data flows both ways around the loop, and the other towers still have
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a connection to the iSeries system unit. But if multiple Integrated xSeries Adapter-based
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integrated servers are shut down from the Linux console, towers that are cabled
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between the shut down servers on the HSL loop become isolated and no longer
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have a connection to the iSeries system unit. If the isolated towers contain
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disk units, the iSeries terminates
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abnormally. Also, if the loop contains a migration tower, shutting down a
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single Integrated xSeries Adapter-based server from the console can
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also bring down the iSeries because data can only flow one way around
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the HSL loop to a migration tower. </p>
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<p>For integrated Linux servers
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running on Integrated xSeries Adapter-attached xSeries machines, the correct way to
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shut down is from iSeries Navigator or the <span class="keyword">i5/OS</span> command
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line. </p>
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<p>For more information on HSL configuration, search for redp-3652
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at the following Web site: </p>
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<p><a href="http://www.redbooks.ibm.com/" target="_blank">http://www.redbooks.ibm.com/</a> <img src="www.gif" alt="Link outside information center" /></p>
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</div>
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</div>
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</div>
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<div class="nested1" xml:lang="en-us" id="rzau9shutdownforce"><a name="rzau9shutdownforce"><!-- --></a><h2 class="topictitle2">Shut down Linux servers by forcing a shut down</h2>
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<div><div class="section"><p>When you issue a shut down command to an integrated Linux server
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from iSeries Navigator
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or an <span class="keyword">i5/OS</span> command line,
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the shut down command is passed to the server to enable it to shut itself
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down cleanly. By default, <span class="keyword">i5/OS</span> waits
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15 minutes (900 seconds) before it performs a forced shut down of an integrated Linux server
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if the server has not already shut itself down. If you want to change this
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default value, do the following steps:</p>
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</div>
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<ol><li><span>Shut down the Linux server.</span></li>
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<li><span>On an <span class="keyword">i5/OS</span> command
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line enter the Change Network Server Description (CHGNWSD) command and press <span class="uicontrol">F4</span>.</span></li>
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<li><span>Scroll down to the Shutdown time-out (SHUTDTIMO) parameter and
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enter the new default value. Press <span class="uicontrol">Enter</span>.</span></li>
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<li><span>Restart the server.</span></li>
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</ol>
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</div>
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</div>
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<div class="nested1" xml:lang="en-us" id="rzau9shutdownpower"><a name="rzau9shutdownpower"><!-- --></a><h2 class="topictitle2">Shut down Linux servers by powering down the iSeries</h2>
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<div><div class="section"><p>It is strongly recommended that you do not power down your <span class="keyword">i5/OS</span> partition when Linux servers
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are active. When the Power Down System (PWRDWNSYS) *IMMED command is issued, <span class="keyword">i5/OS</span> does not try to shut down
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any active integrated Linux servers. When the iSeries powers down it cuts power to
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the Linux servers.
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There is a possibility of data corruption if the servers suffer a forced shut
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down in this way. Always shut down your Linux servers cleanly prior to issuing
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the PWRDWNSYS command.</p>
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<div class="note"><span class="notetitle">Note:</span> The Power Down System (PWRDWNSYS)
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*CNTRLD command will attempt to vary off any active servers prior to powering
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down the system.</div>
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<div class="important"><span class="importanttitle">Important:</span> Never issue a PWRDWNSYS *IMMED
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command without having your integrated Linux servers in shutdown status.</div>
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</div>
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</div>
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</div>
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