3 # Run commands on CTDB nodes.
5 # See http://ctdb.samba.org/ for more information about CTDB.
7 # Copyright (C) Martin Schwenke 2008
9 # Based on an earlier script by Andrew Tridgell and Ronnie Sahlberg.
11 # Copyright (C) Andrew Tridgell 2007
13 # This program is free software; you can redistribute it and/or modify
14 # it under the terms of the GNU General Public License as published by
15 # the Free Software Foundation; either version 3 of the License, or
16 # (at your option) any later version.
18 # This program is distributed in the hope that it will be useful,
19 # but WITHOUT ANY WARRANTY; without even the implied warranty of
20 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 # GNU General Public License for more details.
23 # You should have received a copy of the GNU General Public License
24 # along with this program; if not, see <http://www.gnu.org/licenses/>.
31 Usage: onnode [OPTION] ... <NODES> <COMMAND> ...
33 -c Run in current working directory on specified nodes.
34 -f Specify nodes file, overrides CTDB_NODES_FILE.
35 -i Keep standard input open - the default is to close it.
36 -n Allow nodes to be specified by name.
37 -o <prefix> Save standard output from each node to file <prefix>.<ip>
38 -p Run command in parallel on specified nodes.
39 -P Push given files to nodes instead of running commands.
40 -q Do not print node addresses (overrides -v).
41 -v Print node address even for a single node.
42 <NODES> "all", "any", "ok" (or "healthy"), "con" (or "connected") ; or
43 a node number (0 base); or
44 a hostname (if -n is specified); or
45 list (comma separated) of <NODES>; or
46 range (hyphen separated) of node numbers.
54 echo "Invalid <nodespec>" >&2 ; echo >&2
68 if [ -z "$CTDB_BASE" ] ; then
69 CTDB_BASE="/usr/local/etc/ctdb"
72 . "${CTDB_BASE}/functions"
77 # $POSIXLY_CORRECT means that the command passed to onnode can
78 # take options and getopt won't reorder things to make them
81 # Not on the previous line - local returns 0!
82 temp=$(POSIXLY_CORRECT=1 getopt -n "$prog" -o "cf:hno:pqvPi" -l help -- "$@")
90 -c) current=true ; shift ;;
91 -f) CTDB_NODES_FILE="$2" ; shift 2 ;;
92 -n) names_ok=true ; shift ;;
93 -o) prefix="$2" ; shift 2 ;;
94 -p) parallel=true ; shift ;;
95 -q) quiet=true ; shift ;;
96 -v) verbose=true ; shift ;;
97 -P) push=true ; shift ;;
98 -i) stdin=true ; shift ;;
100 -h|--help|*) usage ;; # Shouldn't happen, so this is reasonable.
104 [ $# -lt 2 ] && usage
106 nodespec="$1" ; shift
117 if [ -n "$node" -a "$node" != "#DEAD" ] ; then
120 echo "${prog}: \"node ${n}\" does not exist" >&2
127 # Subshell avoids hacks to restore $IFS.
132 *-*) seq "${i%-*}" "${i#*-}" 2>/dev/null || invalid_nodespec ;;
133 all|any|ok|healthy|con|connected) echo "$i" ;;
135 [ "$i" -gt -1 ] 2>/dev/null || $names_ok || invalid_nodespec
142 ctdb_status_output="" # cache
143 get_nodes_with_status ()
148 if [ -z "$ctdb_status_output" ] ; then
149 ctdb_status_output=$(ctdb -X status 2>&1)
150 if [ $? -ne 0 ] ; then
151 echo "${prog}: unable to get status of CTDB nodes" >&2
152 echo "$ctdb_status_output" >&2
157 ctdb_status_output="${ctdb_status_output#*${nl}}"
163 while IFS="" read i ; do
165 # Intentional word splitting
166 # shellcheck disable=SC2086
167 set -- $i # split line on colons
168 shift # line starts with : so 1st field is empty
169 local pnn="$1" ; shift
170 shift # ignore IP address but need status bits below
174 # If any bit is 1, don't match this address.
177 [ "$s" != "1" ] || continue 2
181 # If disconnected bit is not 0, don't match this address.
182 [ "$1" = "0" ] || continue
188 # Intentional multi-word expansion
189 # shellcheck disable=SC2086
190 echo_nth "$pnn" $all_nodes
191 done <<<"$ctdb_status_output"
195 get_any_available_node ()
199 # We do a recursive onnode to find which nodes are up and running.
201 out=$("$0" -pq all ctdb pnn 2>&1)
203 if [[ "$line" =~ ^[0-9]+$ ]] ; then
205 # Intentional multi-word expansion
206 # shellcheck disable=SC2086
207 echo_nth "$pnn" $all_nodes
210 # Else must be an error message from a down node.
219 if [ -n "$CTDB_NODES_SOCKETS" ] ; then
220 all_nodes="$CTDB_NODES_SOCKETS"
222 local f="${CTDB_BASE}/nodes"
223 if [ -n "$CTDB_NODES_FILE" ] ; then
225 if [ ! -e "$f" -a "${f#/}" = "$f" ] ; then
226 # $f is relative, try in $CTDB_BASE
227 f="${CTDB_BASE}/${f}"
229 elif [ -n "$CTDB_NODES" ] ; then
233 if [ ! -r "$f" ] ; then
234 echo "${prog}: unable to open nodes file \"${f}\"" >&2
238 all_nodes=$(sed -e 's@#.*@@g' -e 's@ *@@g' -e 's@^$@#DEAD@' "$f")
243 for n in $(parse_nodespec "$1") ; do
244 [ $? != 0 ] && exit 1 # Required to catch exit in above subshell.
247 echo "${all_nodes//#DEAD/}"
250 get_any_available_node "$all_nodes" || exit 1
253 get_nodes_with_status "$all_nodes" "healthy" || exit 1
256 get_nodes_with_status "$all_nodes" "connected" || exit 1
258 [0-9]|[0-9][0-9]|[0-9][0-9][0-9])
259 # Intentional multi-word expansion
260 # shellcheck disable=SC2086
261 echo_nth "$n" $all_nodes
264 $names_ok || invalid_nodespec
277 $verbose && echo "Pushing $f"
279 /*) rsync "$f" "[${host}]:${f}" ;;
280 *) rsync "${PWD}/${f}" "[${host}]:${PWD}/${f}" ;;
287 CTDB_SOCKET="$1" sh -c "$2" 3>/dev/null
292 if [ -n "$prefix" ] ; then
293 cat >"${prefix}.${n//\//_}"
294 elif $verbose && $parallel ; then
303 if $verbose && $parallel ; then
310 ######################################################################
319 $current && command="cd $PWD && $command"
321 if [ -n "$CTDB_NODES_SOCKETS" ] ; then
325 # Could "2>/dev/null || true" but want to see errors from typos in file.
326 [ -r "${CTDB_BASE}/onnode.conf" ] && . "${CTDB_BASE}/onnode.conf"
327 [ -n "$SSH" ] || SSH=ssh
328 if [ "$SSH" = "ssh" ] ; then
329 if $parallel || ! $stdin ; then
333 : # rsh? All bets are off!
338 ######################################################################
340 nodes=$(get_nodes "$nodespec")
341 [ $? != 0 ] && exit 1 # Required to catch exit in above subshell.
346 # If $nodes contains a space or a newline then assume multiple nodes.
349 [ "$nodes" != "${nodes%[ ${nl}]*}" ] && verbose=true
353 # Intentional multi-word expansion
354 # shellcheck disable=SC2086
355 trap 'kill -TERM $pids 2>/dev/null' INT TERM
356 # There's a small race here where the kill can fail if no processes
357 # have been added to $pids and the script is interrupted. However,
358 # the part of the window where it matter is very small.
361 set -o pipefail 2>/dev/null
363 # The following code applies stdout_filter and stderr_filter to
364 # the relevant streams. Both filters are at the end of pipes so
365 # they read from stdin and (by default) write to stdout. To allow
366 # the filters to operate independently, the output of
367 # stdout_filter is sent to a temporary file descriptor (3), which
368 # is redirected back to stdout at the outermost level.
373 $SSH $ssh_opts $EXTRA_SSH_OPTS "$n" "$command" |
375 } 2>&1 | stderr_filter
380 echo >&2 ; echo ">> NODE: $n <<" >&2
386 $SSH $ssh_opts $EXTRA_SSH_OPTS "$n" "$command" |
388 } 2>&1 | stderr_filter
390 [ $? = 0 ] || retcode=$?
397 [ $? = 0 ] || retcode=$?