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diff --git a/ctdb/doc/onnode.1.xml b/ctdb/doc/onnode.1.xml new file mode 100644 index 0000000..f7da04a --- /dev/null +++ b/ctdb/doc/onnode.1.xml @@ -0,0 +1,315 @@ +<?xml version="1.0" encoding="iso-8859-1"?> +<!DOCTYPE refentry + PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" + "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"> +<refentry id="onnode.1"> + + <refmeta> + <refentrytitle>onnode</refentrytitle> + <manvolnum>1</manvolnum> + <refmiscinfo class="source">ctdb</refmiscinfo> + <refmiscinfo class="manual">CTDB - clustered TDB database</refmiscinfo> + </refmeta> + + <refnamediv> + <refname>onnode</refname> + <refpurpose>run commands on CTDB cluster nodes</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <cmdsynopsis> + <command>onnode</command> + <arg rep="repeat"><replaceable>OPTION</replaceable></arg> + <arg choice="req"><replaceable>NODES</replaceable></arg> + <arg choice="req"><replaceable>COMMAND</replaceable></arg> + </cmdsynopsis> + </refsynopsisdiv> + + <refsect1> + <title>DESCRIPTION</title> + <para> + onnode is a utility to run commands on a specific node of a CTDB + cluster, or on all nodes. + </para> + <para> + <replaceable>NODES</replaceable> specifies which node(s) to run + a command on. See section <citetitle>NODES + SPECIFICATION</citetitle> for details. + </para> + <para> + <replaceable>COMMAND</replaceable> can be any shell command. The + onnode utility uses ssh or rsh to connect to the remote nodes + and run the command. + </para> + </refsect1> + + <refsect1> + <title>OPTIONS</title> + + <variablelist> + <varlistentry><term>-c</term> + <listitem> + <para> + Execute COMMAND in the current working directory on the + specified nodes. + </para> + </listitem> + </varlistentry> + + <varlistentry><term>-f <parameter>FILENAME</parameter></term> + <listitem> + <para> + Specify an alternative nodes FILENAME to use instead of + the default. See the discussion of + <filename>/usr/local/etc/ctdb/nodes</filename> in the + FILES section for more details. + </para> + </listitem> + </varlistentry> + + <varlistentry><term>-i</term> + <listitem> + <para> + Keep standard input open, allowing data to be piped to + onnode. Normally onnode closes stdin to avoid surprises + when scripting. Note that this option is ignored when + using <option>-p</option> or if <envar>ONNODE_SSH</envar> + is set to anything other than "ssh". + </para> + </listitem> + </varlistentry> + + <varlistentry><term>-n</term> + <listitem> + <para> + 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>-f /dev/null</code>. + </para> + </listitem> + </varlistentry> + + <varlistentry><term>-p</term> + <listitem> + <para> + Run COMMAND in parallel on the specified nodes. The + default is to run COMMAND sequentially on each node. + </para> + </listitem> + </varlistentry> + + <varlistentry><term>-P</term> + <listitem> + <para> + Push files to nodes. Names of files to push are specified + rather than the usual command. Quoting is fragile/broken + - filenames with whitespace in them are not supported. + </para> + </listitem> + </varlistentry> + + <varlistentry><term>-q</term> + <listitem> + <para> + Do not print node addresses. Normally, onnode prints + informational node addresses if more than one node is + specified. This overrides -v. + </para> + </listitem> + </varlistentry> + + <varlistentry><term>-v</term> + <listitem> + <para> + Print node addresses even if only one node is specified. + Normally, onnode prints informational node addresses when + more than one node is specified. + </para> + </listitem> + </varlistentry> + + <varlistentry><term>-h, --help</term> + <listitem> + <para> + Show a short usage guide. + </para> + </listitem> + </varlistentry> + </variablelist> + </refsect1> + + <refsect1> + <title>NODES SPECIFICATION</title> + + <para> + Nodes can be specified via numeric node numbers (from 0 to N-1) + or mnemonics. Multiple nodes are specified using 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. + </para> + + <para> + The following mnemonics are available: + </para> + + <variablelist> + <varlistentry><term>all</term> + <listitem> + <para> + All nodes. + </para> + </listitem> + </varlistentry> + <varlistentry><term>any</term> + <listitem> + <para> + A node where ctdbd is running. This semi-random but + there is a bias towards choosing a low numbered node. + </para> + </listitem> + </varlistentry> + <varlistentry><term>ok | healthy</term> + <listitem> + <para> + All nodes that are not disconnected, banned, disabled or + unhealthy. + </para> + </listitem> + </varlistentry> + <varlistentry><term>con | connected</term> + <listitem> + <para> + All nodes that are not disconnected. + </para> + </listitem> + </varlistentry> + </variablelist> + </refsect1> + + <refsect1> + <title>EXAMPLES</title> + + <para> + The following command would show the process ID of ctdbd on all nodes + </para> + <screen format="linespecific"> + onnode all ctdb getpid + </screen> + + <para> + The following command would show the last 5 lines of log on each + node, preceded by the node's hostname + </para> + <screen format="linespecific"> + onnode all "hostname; tail -5 /usr/local/var/log/log.ctdb" + </screen> + + <para> + The following command would restart the ctdb service on all + nodes, in parallel. + </para> + <screen format="linespecific"> + onnode -p all service ctdb restart + </screen> + + <para> + The following command would run ./foo in the current working + directory, in parallel, on nodes 0, 2, 3 and 4. + </para> + <screen format="linespecific"> + onnode -c -p 0,2-4 ./foo + </screen> + </refsect1> + + <refsect1> + <title>FILES</title> + + <variablelist> + <varlistentry><term><filename>/usr/local/etc/ctdb/nodes</filename></term> + <listitem> + <para> + Default file containing a list of each node's IP address + or hostname. + </para> + <para> + As above, a file specified via the <option>-f</option> + is given precedence. If a + relative path is specified and no corresponding file + exists relative to the current directory then the file is + also searched for in the CTDB configuration directory. + </para> + <para> + Otherwise the default is + <filename>/usr/local/etc/ctdb/nodes</filename>. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><filename>/usr/local/etc/ctdb/onnode.conf</filename></term> + <listitem> + <para> + If this file exists it is sourced by onnode. The main + purpose is to allow the administrator to set + <envar>ONNODE_SSH</envar> to something other than "ssh". + In this case the -t option is ignored. + </para> + </listitem> + </varlistentry> + </variablelist> + </refsect1> + + <refsect1> + <title>SEE ALSO</title> + + <para> + <citerefentry><refentrytitle>ctdb</refentrytitle> + <manvolnum>7</manvolnum></citerefentry>, + + <ulink url="http://ctdb.samba.org/"/> + </para> + </refsect1> + + <refentryinfo> + <author> + <contrib> + This documentation was written by + Andrew Tridgell, + Martin Schwenke + </contrib> + </author> + + <copyright> + <year>2007</year> + <holder>Andrew Tridgell</holder> + <holder>Ronnie Sahlberg</holder> + </copyright> + <copyright> + <year>2008</year> + <holder>Martin Schwenke</holder> + </copyright> + <legalnotice> + <para> + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License as + published by the Free Software Foundation; either version 3 of + the License, or (at your option) any later version. + </para> + <para> + This program is distributed in the hope that it will be + useful, but WITHOUT ANY WARRANTY; without even the implied + warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + PURPOSE. See the GNU General Public License for more details. + </para> + <para> + You should have received a copy of the GNU General Public + License along with this program; if not, see + <ulink url="http://www.gnu.org/licenses"/>. + </para> + </legalnotice> + </refentryinfo> + +</refentry> |