| #!/usr/bin/env bash |
| |
| # 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. |
| |
| |
| # Run a shell command on all slave hosts. |
| # |
| # Environment Variables |
| # |
| # HADOOP_SLAVES File naming remote hosts. |
| # Default is ${HADOOP_CONF_DIR}/slaves. |
| # HADOOP_CONF_DIR Alternate conf dir. Default is ${HADOOP_HOME}/conf. |
| # HADOOP_SLAVE_SLEEP Seconds to sleep between spawning remote commands. |
| # HADOOP_SSH_OPTS Options passed to ssh when running remote commands. |
| ## |
| |
| usage="Usage: slaves.sh [--config 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"; pwd` |
| |
| . "$bin"/hadoop-config.sh |
| |
| if [ -f "${HADOOP_CONF_DIR}/hadoop-env.sh" ]; then |
| . "${HADOOP_CONF_DIR}/hadoop-env.sh" |
| fi |
| |
| # Where to start the script, see hadoop-config.sh |
| # (it set up the variables based on command line options) |
| if [ "$HADOOP_SLAVE_NAMES" != '' ] ; then |
| SLAVE_NAMES=$HADOOP_SLAVE_NAMES |
| else |
| SLAVE_FILE=${HADOOP_SLAVES:-${HADOOP_CONF_DIR}/slaves} |
| SLAVE_NAMES=$(cat "$SLAVE_FILE" | sed 's/#.*$//;/^$/d') |
| fi |
| |
| # start the daemons |
| for slave in $SLAVE_NAMES ; do |
| ssh $HADOOP_SSH_OPTS $slave $"${@// /\\ }" \ |
| 2>&1 | sed "s/^/$slave: /" & |
| if [ "$HADOOP_SLAVE_SLEEP" != "" ]; then |
| sleep $HADOOP_SLAVE_SLEEP |
| fi |
| done |
| |
| wait |