slaves.sh
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上传日期:2018-01-08
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文件大小:2k
- #!/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 "$0"`
- bin=`cd "$bin"; pwd`
- . "$bin"/hadoop-config.sh
- # If the slaves file is specified in the command line,
- # then it takes precedence over the definition in
- # hadoop-env.sh. Save it here.
- HOSTLIST=$HADOOP_SLAVES
- if [ -f "${HADOOP_CONF_DIR}/hadoop-env.sh" ]; then
- . "${HADOOP_CONF_DIR}/hadoop-env.sh"
- fi
- if [ "$HOSTLIST" = "" ]; then
- if [ "$HADOOP_SLAVES" = "" ]; then
- export HOSTLIST="${HADOOP_CONF_DIR}/slaves"
- else
- export HOSTLIST="${HADOOP_SLAVES}"
- fi
- fi
- for slave in `cat "$HOSTLIST"|sed "s/#.*$//;/^$/d"`; do
- ssh $HADOOP_SSH_OPTS $slave $"${@// /\ }"
- 2>&1 | sed "s/^/$slave: /" &
- if [ "$HADOOP_SLAVE_SLEEP" != "" ]; then
- sleep $HADOOP_SLAVE_SLEEP
- fi
- done
- wait