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ccb51aabe5
In tools/onnode, remove reference to -t option in usage message. (This used to be ctdb commit f2e6b7e9d130eba9132eddda1a5e244a542a23ed)
192 lines
4.4 KiB
Bash
Executable File
192 lines
4.4 KiB
Bash
Executable File
#!/bin/sh
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# Run commands on CTDB nodes.
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# See http://ctdb.samba.org/ for more information about CTDB.
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# Copyright (C) Martin Schwenke 2008
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# Based on an earlier script by Andrew Tridgell and Ronnie Sahlberg.
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# Copyright (C) Andrew Tridgell 2007
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, see <http://www.gnu.org/licenses/>.
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prog=$(basename $0)
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usage ()
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{
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cat >&2 <<EOF
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Usage: onnode [OPTION] ... <NODES> <COMMAND> ...
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options:
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-c Run in current working directory on all nodes.
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-p Run command in parallel on specified nodes.
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-q Do not print node addresses (overrides -v).
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-v Print node address even for a single node.
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<NODES> "all" or a node number (0 base); or
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list (comma separated) of <NODES>; or
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range (hyphen separated) of node numbers.
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EOF
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exit 1
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}
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invalid_nodespec ()
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{
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echo "Invalid <nodespec>" >&2 ; echo >&2
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usage
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}
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# Defaults.
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current=false
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parallel=false
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verbose=false
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quiet=false
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parse_options ()
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{
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# $POSIXLY_CORRECT means that the command passed to onnode can
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# take options and getopt won't reorder things to make them
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# options ot onnode.
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temp=$(POSIXLY_CORRECT=1 getopt -n "$prog" -o "chpqv" -l help -- "$@")
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[ $? != 0 ] && usage
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eval set -- "$temp"
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while true ; do
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case "$1" in
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-c) current=true ; shift ;;
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-p) parallel=true ; shift ;;
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-q) quiet=true ; shift ;;
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-v) verbose=true ; shift ;;
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--) shift ; break ;;
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-h|--help|*) usage ;; # Shouldn't happen, so this is reasonable.
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esac
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done
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[ $# -lt 2 ] && usage
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nodespec="$1" ; shift
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command="$@"
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}
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# Can probably be avoided if we use bash?
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get_nth ()
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{
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n="$1" ; shift
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c=0
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for j ; do
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if [ $n -eq $c ] ; then
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echo $j
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break
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fi
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c=$(($c + 1))
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done
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}
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parse_nodespec ()
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{
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# Subshell avoids hacks to restore $IFS.
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(
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IFS=","
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for i in $1 ; do
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case "$i" in
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*-*) seq "${i%-*}" "${i#*-}" 2>/dev/null || invalid_nodespec ;;
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all) echo all ;;
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*)
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[ $i -gt -1 ] 2>/dev/null || invalid_nodespec
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echo $i
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esac
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done
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)
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}
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get_nodes ()
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{
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[ -f "$CTDB_NODES_FILE" ] || CTDB_NODES_FILE=/etc/ctdb/nodes
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all_nodes=$(egrep '^[[:alnum:]]' $CTDB_NODES_FILE)
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nodes=""
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for n in $(parse_nodespec "$1") ; do
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[ $? != 0 ] && exit 1 # Required to catch exit in above subshell.
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case "$n" in
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all) echo $all_nodes ;;
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*) node=$(get_nth $n $all_nodes)
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if [ -n "$node" ] ; then
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echo $node
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else
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echo "${prog}: \"node ${n}\" does not exist" >&2
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exit 1
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fi
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esac
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done
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}
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######################################################################
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parse_options "$@"
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$current && command="cd $PWD && $command"
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SSH_OPTS=
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# Could "2>/dev/null || true" but want to see errors from typos in file.
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[ -r /etc/ctdb/onnode.conf ] && . /etc/ctdb/onnode.conf
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[ -n "$SSH" ] || SSH=ssh
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if [ "$SSH" = "ssh" ] ; then
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ssh_opts="-n"
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else
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: # rsh? All bets are off!
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fi
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######################################################################
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nodes=$(get_nodes "$nodespec")
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[ $? != 0 ] && exit 1 # Required to catch exit in above subshell.
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if $quiet ; then
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verbose=false
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else
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# If $nodes contains a space or a newline then assume multiple nodes.
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nl="
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"
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[ "$nodes" != "${nodes%[ ${nl}]*}" ] && verbose=true
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fi
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pids=""
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trap 'kill -TERM $pids 2>/dev/null' INT TERM
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# There's a small race here where the kill can fail if no processes
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# have been added to $pids and the script is interrupted. However,
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# the part of the window where it matter is very small.
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for n in $nodes ; do
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if $parallel ; then
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if $verbose ; then
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($SSH $ssh_opts $EXTRA_SSH_OPTS $n "$command" 2>&1 | sed -e "s@^@[$n] @" )&
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else
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$SSH $ssh_opts $EXTRA_SSH_OPTS $n "$command" &
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fi
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pids="${pids} $!"
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else
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if $verbose ; then
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echo >&2 ; echo ">> NODE: $n <<" >&2
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fi
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$SSH $ssh_opts $EXTRA_SSH_OPTS $n "$command"
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fi
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done
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$parallel && wait
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