-#!/bin/bash
+#!/usr/bin/env bash
# Run commands on CTDB nodes.
# 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/>.
Usage: onnode [OPTION] ... <NODES> <COMMAND> ...
options:
-c Run in current working directory on specified nodes.
- -f Specify nodes file, overrides CTDB_NODES_FILE.
+ -f Specify nodes file, overriding default.
-i Keep standard input open - the default is to close it.
-n Allow nodes to be specified by name.
- -o <prefix> Save standard output from each node to file <prefix>.<ip>
-p Run command in parallel on specified nodes.
-P Push given files to nodes instead of running commands.
-q Do not print node addresses (overrides -v).
# Defaults.
current=false
+ctdb_nodes_file=""
parallel=false
verbose=false
quiet=false
-prefix=""
names_ok=false
push=false
stdin=false
CTDB_BASE="/usr/local/etc/ctdb"
fi
-. "${CTDB_BASE}/functions"
-loadconfig "ctdb"
-
parse_options ()
{
- # $POSIXLY_CORRECT means that the command passed to onnode can
- # take options and getopt won't reorder things to make them
- # options ot onnode.
- local temp
- # Not on the previous line - local returns 0!
- temp=$(POSIXLY_CORRECT=1 getopt -n "$prog" -o "cf:hno:pqvPi" -l help -- "$@")
-
- [ $? != 0 ] && usage
-
- eval set -- "$temp"
-
- while true ; do
- case "$1" in
- -c) current=true ; shift ;;
- -f) CTDB_NODES_FILE="$2" ; shift 2 ;;
- -n) names_ok=true ; shift ;;
- -o) prefix="$2" ; shift 2 ;;
- -p) parallel=true ; shift ;;
- -q) quiet=true ; shift ;;
- -v) verbose=true ; shift ;;
- -P) push=true ; shift ;;
- -i) stdin=true ; shift ;;
- --) shift ; break ;;
- -h|--help|*) usage ;; # Shouldn't happen, so this is reasonable.
- esac
- done
-
- [ $# -lt 2 ] && usage
-
- nodespec="$1" ; shift
- command="$*"
+ local opt
+
+ while getopts "cf:hnpqvPi?" opt ; do
+ case "$opt" in
+ c) current=true ;;
+ f) ctdb_nodes_file="$OPTARG" ;;
+ n) names_ok=true ;;
+ p) parallel=true ;;
+ q) quiet=true ;;
+ v) verbose=true ;;
+ P) push=true ;;
+ i) stdin=true ;;
+ \?|h) usage ;;
+ esac
+ done
+ shift $((OPTIND - 1))
+
+ if [ $# -lt 2 ] ; then
+ usage
+ fi
+
+ nodespec="$1" ; shift
+ command="$*"
}
echo_nth ()
{
local n="$1" ; shift
- shift "$n"
- local node="$1"
+ # Note that this is 0-based
+ local node=""
+ if [ "$n" -le $# ] ; then
+ shift "$n"
+ node="$1"
+ fi
- if [ -n "$node" -a "$node" != "#DEAD" ] ; then
+ if [ -n "$node" ] && [ "$node" != "#DEAD" ] ; then
echo "$node"
else
echo "${prog}: \"node ${n}\" does not exist" >&2
if [ -z "$ctdb_status_output" ] ; then
ctdb_status_output=$(ctdb -X status 2>&1)
+ # No! Checking the exit code afterwards is actually clearer...
+ # shellcheck disable=SC2181
if [ $? -ne 0 ] ; then
echo "${prog}: unable to get status of CTDB nodes" >&2
echo "$ctdb_status_output" >&2
fi
local nl="
"
- ctdb_status_output="${ctdb_status_output#*${nl}}"
+ ctdb_status_output="${ctdb_status_output#*"${nl}"}"
fi
(
local i
IFS="${IFS}|"
- while IFS="" read i ; do
+ while IFS="" read -r i ; do
# Intentional word splitting
# shellcheck disable=SC2086
# We do a recursive onnode to find which nodes are up and running.
local out line
out=$("$0" -pq all ctdb pnn 2>&1)
- while read line ; do
- local pnn="${line#PNN:}"
- if [ "$pnn" != "$line" ] ; then
+ while read -r line ; do
+ if [[ "$line" =~ ^[0-9]+$ ]] ; then
+ local pnn="$line"
# Intentional multi-word expansion
# shellcheck disable=SC2086
echo_nth "$pnn" $all_nodes
get_nodes ()
{
- local all_nodes
+ local all_nodes
- if [ -n "$CTDB_NODES_SOCKETS" ] ; then
- all_nodes="$CTDB_NODES_SOCKETS"
- else
local f="${CTDB_BASE}/nodes"
- if [ -n "$CTDB_NODES_FILE" ] ; then
- f="$CTDB_NODES_FILE"
- if [ ! -e "$f" -a "${f#/}" = "$f" ] ; then
- # $f is relative, try in $CTDB_BASE
- f="${CTDB_BASE}/${f}"
- fi
- elif [ -n "$CTDB_NODES" ] ; then
- f="$CTDB_NODES"
+ if [ -n "$ctdb_nodes_file" ] ; then
+ f="$ctdb_nodes_file"
+ if [ ! -e "$f" ] && [ "${f#/}" = "$f" ] ; then
+ # $f is relative, try in $CTDB_BASE
+ f="${CTDB_BASE}/${f}"
+ fi
fi
if [ ! -r "$f" ] ; then
- echo "${prog}: unable to open nodes file \"${f}\"" >&2
- exit 1
+ echo "${prog}: unable to open nodes file \"${f}\"" >&2
+ exit 1
fi
all_nodes=$(sed -e 's@#.*@@g' -e 's@ *@@g' -e 's@^$@#DEAD@' "$f")
- fi
-
- local nodes=""
- local n
- for n in $(parse_nodespec "$1") ; do
- [ $? != 0 ] && exit 1 # Required to catch exit in above subshell.
- case "$n" in
- all)
- echo "${all_nodes//#DEAD/}"
- ;;
- any)
- get_any_available_node "$all_nodes" || exit 1
- ;;
- ok|healthy)
- get_nodes_with_status "$all_nodes" "healthy" || exit 1
- ;;
- con|connected)
- get_nodes_with_status "$all_nodes" "connected" || exit 1
- ;;
- [0-9]|[0-9][0-9]|[0-9][0-9][0-9])
- # Intentional multi-word expansion
- # shellcheck disable=SC2086
- echo_nth "$n" $all_nodes
- ;;
- *)
- $names_ok || invalid_nodespec
- echo "$n"
- esac
- done
-}
-
-push()
-{
- local host="$1"
- local files="$2"
-
- local f
- for f in $files ; do
- $verbose && echo "Pushing $f"
- case "$f" in
- /*) rsync "$f" "[${host}]:${f}" ;;
- *) rsync "${PWD}/${f}" "[${host}]:${PWD}/${f}" ;;
- esac
- done
-}
-
-fakessh ()
-{
- CTDB_SOCKET="$1" sh -c "$2" 3>/dev/null
-}
-stdout_filter ()
-{
- if [ -n "$prefix" ] ; then
- cat >"${prefix}.${n//\//_}"
- elif $verbose && $parallel ; then
- sed -e "s@^@[$n] @"
- else
- cat
- fi
+ local n nodes
+ nodes=$(parse_nodespec "$1") || exit $?
+ for n in $nodes ; do
+ case "$n" in
+ all)
+ echo "${all_nodes//#DEAD/}"
+ ;;
+ any)
+ get_any_available_node "$all_nodes" || exit 1
+ ;;
+ ok|healthy)
+ get_nodes_with_status "$all_nodes" "healthy" || exit 1
+ ;;
+ con|connected)
+ get_nodes_with_status "$all_nodes" "connected" || exit 1
+ ;;
+ [0-9]|[0-9][0-9]|[0-9][0-9][0-9])
+ # Intentional multi-word expansion
+ # shellcheck disable=SC2086
+ echo_nth "$n" $all_nodes
+ ;;
+ *)
+ $names_ok || invalid_nodespec
+ echo "$n"
+ esac
+ done
}
-stderr_filter ()
+# shellcheck disable=SC2317
+# push() called indirectly via $ONNODE_SSH
+push ()
{
- if $verbose && $parallel ; then
- sed -e "s@^@[$n] @"
- else
- cat
- fi
+ local host="$1"
+ local files="$2"
+
+ local f
+ for f in $files ; do
+ $verbose && echo "Pushing $f"
+ case "$f" in
+ /*) rsync "$f" "[${host}]:${f}" ;;
+ *) rsync "${PWD}/${f}" "[${host}]:${PWD}/${f}" ;;
+ esac
+ done
}
######################################################################
ssh_opts=
if $push ; then
- SSH=push
- EXTRA_SSH_OPTS=""
+ if [ -n "$ONNODE_SSH" ] ; then
+ export RSYNC_RSH="$ONNODE_SSH"
+ fi
+ ONNODE_SSH=push
else
- $current && command="cd $PWD && $command"
+ $current && command="cd $PWD && $command"
- if [ -n "$CTDB_NODES_SOCKETS" ] ; then
- SSH=fakessh
- EXTRA_SSH_OPTS=""
- else
# Could "2>/dev/null || true" but want to see errors from typos in file.
[ -r "${CTDB_BASE}/onnode.conf" ] && . "${CTDB_BASE}/onnode.conf"
- [ -n "$SSH" ] || SSH=ssh
- if [ "$SSH" = "ssh" ] ; then
- if $parallel || ! $stdin ; then
+ [ -n "$ONNODE_SSH" ] || ONNODE_SSH=ssh
+ # $ONNODE_SSH must accept the -n option - it can be ignored!
+ if $parallel || ! $stdin ; then
ssh_opts="-n"
- fi
- else
- : # rsh? All bets are off!
fi
- fi
fi
######################################################################
-nodes=$(get_nodes "$nodespec")
-[ $? != 0 ] && exit 1 # Required to catch exit in above subshell.
+nodes=$(get_nodes "$nodespec") || exit $?
if $quiet ; then
verbose=false
# If $nodes contains a space or a newline then assume multiple nodes.
nl="
"
- [ "$nodes" != "${nodes%[ ${nl}]*}" ] && verbose=true
+ [ "$nodes" != "${nodes%[ "${nl}"]*}" ] && verbose=true
fi
pids=""
# the part of the window where it matter is very small.
retcode=0
for n in $nodes ; do
- set -o pipefail 2>/dev/null
- if $parallel ; then
- { exec 3>&1 ; { $SSH $ssh_opts $EXTRA_SSH_OPTS "$n" "$command" | stdout_filter >&3 ; } 2>&1 | stderr_filter ; } &
- pids="${pids} $!"
- else
- if $verbose ; then
- echo >&2 ; echo ">> NODE: $n <<" >&2
+ set -o pipefail 2>/dev/null
+
+ ssh_cmd="$ONNODE_SSH $ssh_opts"
+ if $parallel ; then
+ if $verbose ; then
+ $ssh_cmd "$n" "$command" 2>&1 | sed -e "s@^@[$n] @"
+ else
+ $ssh_cmd "$n" "$command"
+ fi &
+ pids="${pids} $!"
+ else
+ if $verbose ; then
+ echo >&2 ; echo ">> NODE: $n <<" >&2
+ fi
+ {
+ $ssh_cmd "$n" "$command"
+ } || retcode=$?
fi
-
- { exec 3>&1 ; { $SSH $ssh_opts $EXTRA_SSH_OPTS "$n" "$command" | stdout_filter >&3 ; } 2>&1 | stderr_filter ; }
- [ $? = 0 ] || retcode=$?
- fi
done
-$parallel && {
- for p in $pids; do
- wait "$p"
- [ $? = 0 ] || retcode=$?
- done
-}
+if $parallel ; then
+ for p in $pids; do
+ wait "$p" || retcode=$?
+ done
+fi
exit $retcode
git.samba.org / vlendec / samba-autobuild / .git / blobdiff