98 lines
2.7 KiB
Bash
98 lines
2.7 KiB
Bash
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#!/usr/bin/env bash
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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership.
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# The ASF licenses this file to You under the Apache License, Version 2.0
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# (the "License"); you may not use this file except in compliance with
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# the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# Start hadoop dfs daemons.
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# Optinally upgrade or rollback dfs state.
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# Run this on master node.
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usage="Usage: start-dfs.sh [-upgrade|-rollback]"
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bin=`dirname "${BASH_SOURCE-$0}"`
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bin=`cd "$bin"; pwd`
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if [ -e "$bin/../libexec/hdfs-config.sh" ]; then
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. "$bin"/../libexec/hdfs-config.sh
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else
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. "$bin/hdfs-config.sh"
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fi
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# get arguments
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if [ $# -ge 1 ]; then
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nameStartOpt="$1"
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shift
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case "$nameStartOpt" in
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(-upgrade)
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;;
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(-rollback)
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dataStartOpt="$nameStartOpt"
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;;
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(*)
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echo $usage
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exit 1
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;;
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esac
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fi
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#---------------------------------------------------------
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# namenodes
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NAMENODES=$($HADOOP_PREFIX/bin/hdfs getconf -namenodes)
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echo "Starting namenodes on [$NAMENODES]"
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"$HADOOP_PREFIX/bin/hadoop-daemons.sh" \
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--config "$HADOOP_CONF_DIR" \
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--hostnames "$NAMENODES" \
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--script "$bin/hdfs" start namenode $nameStartOpt
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#---------------------------------------------------------
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# datanodes (using defalut slaves file)
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if [ -n "$HADOOP_SECURE_DN_USER" ]; then
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echo \
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"Attempting to start secure cluster, skipping datanodes. " \
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"Run start-secure-dns.sh as root to complete startup."
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else
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"$HADOOP_PREFIX/bin/hadoop-daemons.sh" \
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--config "$HADOOP_CONF_DIR" \
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--script "$bin/hdfs" start datanode $dataStartOpt
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fi
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#---------------------------------------------------------
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# secondary namenodes (if any)
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# if there are no secondary namenodes configured it returns
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# 0.0.0.0 or empty string
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SECONDARY_NAMENODES=$($HADOOP_PREFIX/bin/hdfs getconf -secondarynamenodes 2>&-)
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SECONDARY_NAMENODES=${SECONDARY_NAMENODES:='0.0.0.0'}
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if [ "$SECONDARY_NAMENODES" = '0.0.0.0' ] ; then
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echo \
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"Secondary namenodes are not configured. " \
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"Cannot start secondary namenodes."
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else
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echo "Starting secondary namenodes [$SECONDARY_NAMENODES]"
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"$HADOOP_PREFIX/bin/hadoop-daemons.sh" \
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--config "$HADOOP_CONF_DIR" \
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--hostnames "$SECONDARY_NAMENODES" \
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--script "$bin/hdfs" start secondarynamenode
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fi
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# eof
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