| #!/usr/bin/env bash |
| #/** |
| # @@@ START COPYRIGHT @@@ |
| # |
| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you under the Apache License, Version 2.0 (the |
| # "License"); you may not use this file except in compliance |
| # with the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, |
| # software distributed under the License is distributed on an |
| # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| # KIND, either express or implied. See the License for the |
| # specific language governing permissions and limitations |
| # under the License. |
| # |
| # @@@ END COPYRIGHT @@@ |
| # */ |
| # |
| # Run a shell command on all server hosts. |
| # |
| # Environment Variables |
| # |
| # DCS_SERVERS File naming remote hosts. |
| # |
| # Modelled after $HADOOP_HOME/bin/slaves.sh. |
| |
| usage="Usage: servers [--config <dcs-confdir>] command..." |
| |
| # if no args specified, show usage |
| if [ $# -le 0 ]; then |
| echo $usage |
| exit 1 |
| fi |
| |
| bin=`dirname "${BASH_SOURCE-$0}"` |
| bin=`cd "$bin">/dev/null; pwd` |
| |
| . "$bin"/dcs-config.sh |
| |
| # If the servers file is specified in the command line, |
| # then it takes precedence over the definition in |
| # dcs-env.sh. Save it here. |
| HOSTLIST=$DCS_SERVERS |
| |
| if [ "$HOSTLIST" = "" ]; then |
| if [ "$DCS_SERVERS" = "" ]; then |
| export HOSTLIST="${DCS_CONF_DIR}/servers" |
| else |
| export HOSTLIST="${DCS_SERVERS}" |
| fi |
| fi |
| |
| instance=1 |
| |
| while read server count |
| do |
| if [ "$server" == "localhost" ] || [ "$server" == "$HOSTNAME" ] ; then |
| eval $"${@// /\\ } $instance $count" 2>&1 | sed "s/^/$server: /" & |
| else |
| if ${DCS_SLAVE_PARALLEL:-true}; then |
| ssh -q -n $DCS_SSH_OPTS $server $"${@// /\\ } $instance $count"\ |
| 2>&1 | sed "s/^/$server: /" & |
| else # run each command serially |
| ssh -q -n $DCS_SSH_OPTS $server $"${@// /\\ } $instance $count" \ |
| 2>&1 | sed "s/^/$server: /" & |
| fi |
| fi |
| |
| if [ "$DCS_SLAVE_SLEEP" != "" ]; then |
| sleep $DCS_SLAVE_SLEEP |
| fi |
| |
| let instance++ |
| |
| done < "$HOSTLIST" |
| |
| wait |