.\" Title: onnode .\" Author: [FIXME: author] [see http://docbook.sf.net/el/author] .\" Generator: DocBook XSL Stylesheets v1.74.0 .\" Date: 07/10/2008 .\" Manual: [FIXME: manual] .\" Source: [FIXME: source] .\" Language: English .\" .TH "ONNODE" "1" "07/10/2008" "[FIXME: source]" "[FIXME: manual]" .\" ----------------------------------------------------------------- .\" * (re)Define some macros .\" ----------------------------------------------------------------- .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .\" toupper - uppercase a string (locale-aware) .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .de toupper .tr aAbBcCdDeEfFgGhHiIjJkKlLmMnNoOpPqQrRsStTuUvVwWxXyYzZ \\$* .tr aabbccddeeffgghhiijjkkllmmnnooppqqrrssttuuvvwwxxyyzz .. .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .\" SH-xref - format a cross-reference to an SH section .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .de SH-xref .ie n \{\ .\} .toupper \\$* .el \{\ \\$* .\} .. .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .\" SH - level-one heading that works better for non-TTY output .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .de1 SH .\" put an extra blank line of space above the head in non-TTY output .if t \{\ .sp 1 .\} .sp \\n[PD]u .nr an-level 1 .set-an-margin .nr an-prevailing-indent \\n[IN] .fi .in \\n[an-margin]u .ti 0 .HTML-TAG ".NH \\n[an-level]" .it 1 an-trap .nr an-no-space-flag 1 .nr an-break-flag 1 \." make the size of the head bigger .ps +3 .ft B .ne (2v + 1u) .ie n \{\ .\" if n (TTY output), use uppercase .toupper \\$* .\} .el \{\ .nr an-break-flag 0 .\" if not n (not TTY), use normal case (not uppercase) \\$1 .in \\n[an-margin]u .ti 0 .\" if not n (not TTY), put a border/line under subheading .sp -.6 \l'\n(.lu' .\} .. .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .\" SS - level-two heading that works better for non-TTY output .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .de1 SS .sp \\n[PD]u .nr an-level 1 .set-an-margin .nr an-prevailing-indent \\n[IN] .fi .in \\n[IN]u .ti \\n[SN]u .it 1 an-trap .nr an-no-space-flag 1 .nr an-break-flag 1 .ps \\n[PS-SS]u \." make the size of the head bigger .ps +2 .ft B .ne (2v + 1u) .if \\n[.$] \&\\$* .. .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .\" BB/BE - put background/screen (filled box) around block of text .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .de BB .if t \{\ .sp -.5 .br .in +2n .ll -2n .gcolor red .di BX .\} .. .de EB .if t \{\ .if "\\$2"adjust-for-leading-newline" \{\ .sp -1 .\} .br .di .in .ll .gcolor .nr BW \\n(.lu-\\n(.i .nr BH \\n(dn+.5v .ne \\n(BHu+.5v .ie "\\$2"adjust-for-leading-newline" \{\ \M[\\$1]\h'1n'\v'+.5v'\D'P \\n(BWu 0 0 \\n(BHu -\\n(BWu 0 0 -\\n(BHu'\M[] .\} .el \{\ \M[\\$1]\h'1n'\v'-.5v'\D'P \\n(BWu 0 0 \\n(BHu -\\n(BWu 0 0 -\\n(BHu'\M[] .\} .in 0 .sp -.5v .nf .BX .in .sp .5v .fi .\} .. .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .\" BM/EM - put colored marker in margin next to block of text .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .de BM .if t \{\ .br .ll -2n .gcolor red .di BX .\} .. .de EM .if t \{\ .br .di .ll .gcolor .nr BH \\n(dn .ne \\n(BHu \M[\\$1]\D'P -.75n 0 0 \\n(BHu -(\\n[.i]u - \\n(INu - .75n) 0 0 -\\n(BHu'\M[] .in 0 .nf .BX .in .fi .\} .. .\" ----------------------------------------------------------------- .\" * set default formatting .\" ----------------------------------------------------------------- .\" disable hyphenation .nh .\" disable justification (adjust text to left margin only) .ad l .\" ----------------------------------------------------------------- .\" * MAIN CONTENT STARTS HERE * .\" ----------------------------------------------------------------- .SH "Name" onnode \- run commands on ctdb nodes .SH "Synopsis" .fam C .HP \w'\fBonnode\ [OPTION]\ \&.\&.\&.\ NODES\ COMMAND\ \&.\&.\&.\fR\ 'u \fBonnode [OPTION] \&.\&.\&. NODES COMMAND \&.\&.\&.\fR .fam .SH "DESCRIPTION" .PP onnode is a utility to run commands on a specific node of a CTDB cluster, or on all nodes\&. .PP The NODES 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\'\&. 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\&. .PP The COMMAND can be any shell command\&. The onnode utility uses ssh or rsh to connect to the remote nodes and run the command\&. .SH "OPTIONS" .PP \-c .RS 4 Execute COMMAND in the current working directory on each node\&. .RE .PP \-p .RS 4 Run commands in parallel on the specified nodes\&. In this mode .RE .PP \-q .RS 4 Do not print node addresses\&. Normally, onnode prints informational node addresses if more than one node is specified\&. This overrides \-v\&. .RE .PP \-v .RS 4 Print a node addresses even if only one node is specified\&. Normally, onnode prints informational node addresses when more than one node is specified\&. .RE .PP \-h, \-\-help .RS 4 Show a short usage guide\&. .RE .SH "EXAMPLES" .PP The following command would show the process ID of ctdb on all nodes .sp .if n \{\ .RS 4 .\} .fam C .ps -1 .nf .if t \{\ .sp -1 .\} .BB lightgray adjust-for-leading-newline .sp -1 onnode all pidof ctdbd .EB lightgray adjust-for-leading-newline .if t \{\ .sp 1 .\} .fi .fam .ps +1 .if n \{\ .RE .\} .PP The following command would show the last 5 lines of log on each node, preceded by the node\'s hostname .sp .if n \{\ .RS 4 .\} .fam C .ps -1 .nf .if t \{\ .sp -1 .\} .BB lightgray adjust-for-leading-newline .sp -1 onnode all "hostname; tail \-5 /var/log/log\&.ctdb" .EB lightgray adjust-for-leading-newline .if t \{\ .sp 1 .\} .fi .fam .ps +1 .if n \{\ .RE .\} .PP The following command would restart the ctdb service on all nodes\&. .sp .if n \{\ .RS 4 .\} .fam C .ps -1 .nf .if t \{\ .sp -1 .\} .BB lightgray adjust-for-leading-newline .sp -1 onnode all service ctdb restart .EB lightgray adjust-for-leading-newline .if t \{\ .sp 1 .\} .fi .fam .ps +1 .if n \{\ .RE .\} .PP The following command would run \&./foo in the current working directory, in parallel, on nodes 0, 2, 3 and 4\&. .sp .if n \{\ .RS 4 .\} .fam C .ps -1 .nf .if t \{\ .sp -1 .\} .BB lightgray adjust-for-leading-newline .sp -1 onnode \-c \-p 0,2\-4 \&./foo .EB lightgray adjust-for-leading-newline .if t \{\ .sp 1 .\} .fi .fam .ps +1 .if n \{\ .RE .\} .SH "FILES" .PP /etc/ctdb/nodes .RS 4 Contains a list of each node\'s IP address or hostname\&. .RE .PP /etc/ctdb/onnode\&.conf .RS 4 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\&. .RE .SH "SEE ALSO" .PP ctdbd(1), ctdb(1), \m[blue]\fB\%http://ctdb.samba.org/\fR\m[] .SH "COPYRIGHT/LICENSE" .sp .if n \{\ .RS 4 .\} .fam C .ps -1 .nf .if t \{\ .sp -1 .\} .BB lightgray adjust-for-leading-newline .sp -1 Copyright (C) Andrew Tridgell 2007 Copyright (C) Ronnie sahlberg 2007 Copyright (C) Martin Schwenke 2008 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/\&. .EB lightgray adjust-for-leading-newline .if t \{\ .sp 1 .\} .fi .fam .ps +1 .if n \{\ .RE .\}