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onnode

NAME

onnode - run commands on ctdb nodes

SYNOPSIS

onnode NODE COMMAND ...

DESCRIPTION

onnode is a utility to run commands on a specific node of a CTDB cluster, or on all nodes.

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 COMMAND can be any shell command. The onnode utility uses ssh or rsh to connect to the remote nodes and run the command.

If the COMMAND starts with a /, then the command is run via the 'at' service. Otherwise the command is run in the foreground.

EXAMPLES

The following command would show the process ID of ctdb on all nodes

 onnode all pidof ctdbd
       
 

The following command would show the last 5 lines of log on each node, preceded by the nodes hostname

 onnode all "hostname; tail -5 /var/log/log.ctdb"
       
 

The following command would restart the ctdb service on all nodes.

 onnode all service ctdb restart
       
 

SEE ALSO

ctdbd(1), ctdb(1), http://ctdb.samba.org/

COPYRIGHT/LICENSE

 Copyright (C) Andrew Tridgell 2007
 Copyright (C) Ronnie sahlberg 2007
 
 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.
 
 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.
 
 You should have received a copy of the GNU General Public License
 along with this program; if not, see http://www.gnu.org/licenses/.