-<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>onnode</title><meta name="generator" content="DocBook XSL Stylesheets V1.7
2.0"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="refentry" lang="en"><a name="onnode.1"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>onnode — run commands on ctdb nodes</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="cmdsynopsis"><p><code class="command">onnode NODE COMMAND ...</code> </p></div></div><div class="refsect1" lang="en"><a name="id2490458"></a><h2>DESCRIPTION</h2><p>
+<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>onnode</title><meta name="generator" content="DocBook XSL Stylesheets V1.7
5.2"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="refentry" title="onnode"><a name="onnode.1"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>onnode — run commands on ctdb nodes</p></div><div class="refsynopsisdiv" title="Synopsis"><h2>Synopsis</h2><div class="cmdsynopsis"><p><code class="command">onnode [OPTION] ... NODES COMMAND ...</code> </p></div></div><div class="refsect1" title="DESCRIPTION"><a name="id2602518"></a><h2>DESCRIPTION</h2><p>
onnode is a utility to run commands on a specific node of a CTDB
cluster, or on all nodes.
</p><p>
- The NODE option specifies which node to run a command on. You
- can specify a numeric node number (from 0 to N-1) or the special
- node 'all'.
+ The NODES option specifies which node to run a command on. You
+ can specify a numeric node number (from 0 to N-1) or a
+ descriptive node specification (see DESCRIPTIVE NODE
+ SPECIFICATIONS below). You can also specify lists of nodes,
+ separated by commas, and ranges of numeric node numbers,
+ separated by dashes. If nodes are specified multiple times then
+ the command will be executed multiple times on those nodes. The
+ order of nodes is significant.
</p><p>
The COMMAND can be any shell command. The onnode utility uses
ssh or rsh to connect to the remote nodes and run the command.
- </p><p>
- If the COMMAND starts with a /, then the command is run via the
- 'at' service. Otherwise the command is run in the foreground.
- </p></div><div class="refsect1" lang="en"><a name="id2487794"></a><h2>EXAMPLES</h2><p>
+ </p></div><div class="refsect1" title="DESCRIPTIVE NODE SPECIFICATIONS"><a name="id2602547"></a><h2>DESCRIPTIVE NODE SPECIFICATIONS</h2><p>
+ The following descriptive node specification can be used in
+ place of numeric node numbers:
+ </p><div class="variablelist"><dl><dt><span class="term">all</span></dt><dd><p>
+ All nodes.
+ </p></dd><dt><span class="term">any</span></dt><dd><p>
+ A node where ctdbd is running. This semi-random but
+ there is a bias towards choosing a low numbered node.
+ </p></dd><dt><span class="term">ok | healthy</span></dt><dd><p>
+ All nodes that are not disconnected, banned, disabled or
+ unhealthy.
+ </p></dd><dt><span class="term">con | connected</span></dt><dd><p>
+ All nodes that are not disconnected.
+ </p></dd><dt><span class="term">lvs | lvsmaster</span></dt><dd><p>
+ The current LVS master.
+ </p></dd><dt><span class="term">natgw | natgwlist</span></dt><dd><p>
+ The current NAT gateway.
+ </p></dd><dt><span class="term">rm | recmaster</span></dt><dd><p>
+ The current recovery master.
+ </p></dd></dl></div></div><div class="refsect1" title="OPTIONS"><a name="id2600718"></a><h2>OPTIONS</h2><div class="variablelist"><dl><dt><span class="term">-c</span></dt><dd><p>
+ Execute COMMAND in the current working directory on the
+ specified nodes.
+ </p></dd><dt><span class="term">-o <prefix></span></dt><dd><p>
+ Causes standard output from each node to be saved into a
+ file with name <prefix>.<ip>.
+ </p></dd><dt><span class="term">-p</span></dt><dd><p>
+ Run COMMAND in parallel on the specified nodes. The
+ default is to run COMMAND sequentially on each node.
+ </p></dd><dt><span class="term">-q</span></dt><dd><p>
+ Do not print node addresses. Normally, onnode prints
+ informational node addresses if more than one node is
+ specified. This overrides -v.
+ </p></dd><dt><span class="term">-n</span></dt><dd><p>
+ Allow nodes to be specified by name rather than node
+ numbers. These nodes don't need to be listed in the nodes
+ file. You can avoid the nodes file entirely by combining
+ this with <code class="code">-f /dev/null</code>.
+ </p></dd><dt><span class="term">-f <file></span></dt><dd><p>
+ Specify an alternative nodes file to use instead of the
+ default. This option overrides the CTDB_NODES_FILE
+ environment variable. See the discussion of
+ <code class="filename">/etc/ctdb/nodes</code> in the FILES section
+ for more details.
+ </p></dd><dt><span class="term">-v</span></dt><dd><p>
+ Print a node addresses even if only one node is specified.
+ Normally, onnode prints informational node addresses when
+ more than one node is specified.
+ </p></dd><dt><span class="term">-h, --help</span></dt><dd><p>
+ Show a short usage guide.
+ </p></dd></dl></div></div><div class="refsect1" title="EXAMPLES"><a name="id2600855"></a><h2>EXAMPLES</h2><p>
The following command would show the process ID of ctdb on all nodes
-
</p><pre class="screen">
-onnode all pidof ctdbd
+ </p><pre class="screen">
+ onnode all pidof ctdbd
+ </pre><p>
The following command would show the last 5 lines of log on each
- node, preceded by the nodes hostname
-
</p><pre class="screen">
-onnode all "hostname; tail -5 /var/log/log.ctdb"
+ node, preceded by the node's hostname
+ </p><pre class="screen">
+ onnode all "hostname; tail -5 /var/log/log.ctdb"
+ </pre><p>
The following command would restart the ctdb service on all nodes.
- </p><pre class="screen">
-onnode all service ctdb restart
- </pre></div><div class="refsect1" lang="en"><a name="id2488692"></a><h2>SEE ALSO</h2><p>
- ctdbd(1), ctdb(1), <a href="http://ctdb.samba.org/" target="_top">http://ctdb.samba.org/</a>
- </p></div><div class="refsect1" lang="en"><a name="id2488704"></a><h2>COPYRIGHT/LICENSE</h2><div class="literallayout"><p><br>
+ </p><pre class="screen">
+ onnode all service ctdb restart
+ </pre><p>
+ The following command would run ./foo in the current working
+ directory, in parallel, on nodes 0, 2, 3 and 4.
+ </p><pre class="screen">
+ onnode -c -p 0,2-4 ./foo
+ </pre></div><div class="refsect1" title="ENVIRONMENT"><a name="id2600905"></a><h2>ENVIRONMENT</h2><div class="variablelist"><dl><dt><span class="term"><code class="envar">CTDB_NODES_FILE</code></span></dt><dd><p>
+ Name of alternative nodes file to use instead of the
+ default. See the discussion of
+ <code class="filename">/etc/ctdb/nodes</code> in the FILES section
+ for more details.
+ </p></dd></dl></div></div><div class="refsect1" title="FILES"><a name="id2652169"></a><h2>FILES</h2><div class="variablelist"><dl><dt><span class="term"><code class="filename">/etc/ctdb/nodes</code></span></dt><dd><p>
+ Default file containing a list of each node's IP address
+ or hostname.
+ </p><p>
+ Actually, the default is
+ <code class="filename">$<code class="envar">CTDB_BASE</code>/nodes</code>,
+ where <code class="envar">$CTDB_BASE</code> defaults to
+ <code class="filename">/etc/ctdb</code>. If a relative path is
+ given (via the -f option or <code class="envar">$CTDB_BASE</code>) and
+ no corresponding file exists relative to the current
+ directory then the file is also searched for in the
+ <code class="filename">$<code class="envar">CTDB_BASE</code></code> directory.
+ </p></dd><dt><span class="term"><code class="filename">/etc/ctdb/onnode.conf</code></span></dt><dd><p>
+ If this file exists it is sourced by onnode. The main
+ purpose is to allow the administrator to set $SSH to
+ something other than "ssh". In this case the -t option is
+ ignored. For example, the administrator may choose to use
+ use rsh instead of ssh.
+ </p></dd></dl></div></div><div class="refsect1" title="SEE ALSO"><a name="id2652258"></a><h2>SEE ALSO</h2><p>
+ ctdbd(1), ctdb(1), <a class="ulink" href="http://ctdb.samba.org/" target="_top">http://ctdb.samba.org/</a>
+ </p></div><div class="refsect1" title="COPYRIGHT/LICENSE"><a name="id2652271"></a><h2>COPYRIGHT/LICENSE</h2><div class="literallayout"><p><br>
Copyright (C) Andrew Tridgell 2007<br>
Copyright (C) Ronnie sahlberg 2007<br>
+Copyright (C) Martin Schwenke 2008<br>
<br>
This program is free software; you can redistribute it and/or modify<br>
it under the terms of the GNU General Public License as published by<br>
-the Free Software Foundation; either version 2 of the License, or (at<br>
+the Free Software Foundation; either version 3 of the License, or (at<br>
your option) any later version.<br>
<br>
This program is distributed in the hope that it will be useful, but<br>
General Public License for more details.<br>
<br>
You should have received a copy of the GNU General Public License<br>
-along with this program; if not, write to the Free Software<br>
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.<br>
+along with this program; if not, see http://www.gnu.org/licenses/.<br>
</p></div></div></div></body></html>
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