start-dfs.sh
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上传日期:2018-01-08
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- #!/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.
- # Start hadoop dfs daemons.
- # Optinally upgrade or rollback dfs state.
- # Run this on master node.
- usage="Usage: start-dfs.sh [-upgrade|-rollback]"
- bin=`dirname "$0"`
- bin=`cd "$bin"; pwd`
- . "$bin"/hadoop-config.sh
- # get arguments
- if [ $# -ge 1 ]; then
- nameStartOpt=$1
- shift
- case $nameStartOpt in
- (-upgrade)
- ;;
- (-rollback)
- dataStartOpt=$nameStartOpt
- ;;
- (*)
- echo $usage
- exit 1
- ;;
- esac
- fi
- # start dfs daemons
- # start namenode after datanodes, to minimize time namenode is up w/o data
- # note: datanodes will log connection errors until namenode starts
- "$bin"/hadoop-daemon.sh --config $HADOOP_CONF_DIR start namenode $nameStartOpt
- "$bin"/hadoop-daemons.sh --config $HADOOP_CONF_DIR start datanode $dataStartOpt
- "$bin"/hadoop-daemons.sh --config $HADOOP_CONF_DIR --hosts masters start secondarynamenode