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start-dfs.sh
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start-dfs.sh
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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.
function hadoop_usage
{
echo "Usage: start-dfs.sh [-upgrade|-rollback] [-clusterId]"
}
this="${BASH_SOURCE-$0}"
bin=$(cd -P -- "$(dirname -- "${this}")" >/dev/null && pwd -P)
# let's locate libexec...
if [[ -n "${HADOOP_PREFIX}" ]]; then
HADOOP_DEFAULT_LIBEXEC_DIR="${HADOOP_PREFIX}/libexec"
else
HADOOP_DEFAULT_LIBEXEC_DIR="${bin}/../libexec"
fi
HADOOP_LIBEXEC_DIR="${HADOOP_LIBEXEC_DIR:-$HADOOP_DEFAULT_LIBEXEC_DIR}"
# shellcheck disable=SC2034
HADOOP_NEW_CONFIG=true
if [[ -f "${HADOOP_LIBEXEC_DIR}/hdfs-config.sh" ]]; then
. "${HADOOP_LIBEXEC_DIR}/hdfs-config.sh"
else
echo "ERROR: Cannot execute ${HADOOP_LIBEXEC_DIR}/hdfs-config.sh." 2>&1
exit 1
fi
# get arguments
if [[ $# -ge 1 ]]; then
startOpt="$1"
shift
case "$startOpt" in
-upgrade)
nameStartOpt="$startOpt"
;;
-rollback)
dataStartOpt="$startOpt"
;;
*)
hadoop_exit_with_usage 1
;;
esac
fi
#Add other possible options
nameStartOpt="$nameStartOpt $*"
#---------------------------------------------------------
# namenodes
NAMENODES=$("${HADOOP_HDFS_HOME}/bin/hdfs" getconf -namenodes 2>/dev/null)
if [[ -z "${NAMENODES}" ]]; then
NAMENODES=$(hostname)
fi
echo "Starting namenodes on [${NAMENODES}]"
"${HADOOP_HDFS_HOME}/bin/hdfs" \
--slaves \
--config "${HADOOP_CONF_DIR}" \
--hostnames "${NAMENODES}" \
--daemon start \
namenode ${nameStartOpt}
#---------------------------------------------------------
# datanodes (using default slaves file)
if [[ -n "${HADOOP_SECURE_DN_USER}" ]] &&
[[ -z "${HADOOP_SECURE_COMMAND}" ]]; then
hadoop_error "ERROR: Attempting to start secure cluster, skipping datanodes. "
hadoop_error "ERROR: Run start-secure-dns.sh as root or configure "
hadoop_error "ERROR: \${HADOOP_SECURE_COMMAND} to complete startup."
else
echo "Starting datanodes"
"${HADOOP_HDFS_HOME}/bin/hdfs" \
--slaves \
--config "${HADOOP_CONF_DIR}" \
--daemon start \
datanode ${dataStartOpt}
fi
#---------------------------------------------------------
# secondary namenodes (if any)
SECONDARY_NAMENODES=$("${HADOOP_HDFS_HOME}/bin/hdfs" getconf -secondarynamenodes 2>/dev/null)
if [[ -n "${SECONDARY_NAMENODES}" ]]; then
if [[ "${NAMENODES}" =~ , ]]; then
hadoop_error "ERROR: Highly available NameNode is configured."
hadoop_error "ERROR: Skipping SecondaryNameNode."
else
if [[ "${SECONDARY_NAMENODES}" == "0.0.0.0" ]]; then
SECONDARY_NAMENODES=$(hostname)
fi
echo "Starting secondary namenodes [${SECONDARY_NAMENODES}]"
"${HADOOP_HDFS_HOME}/bin/hdfs" \
--slaves \
--config "${HADOOP_CONF_DIR}" \
--hostnames "${SECONDARY_NAMENODES}" \
--daemon start \
secondarynamenode
fi
fi
#---------------------------------------------------------
# quorumjournal nodes (if any)
SHARED_EDITS_DIR=$("${HADOOP_HDFS_HOME}/bin/hdfs" getconf -confKey dfs.namenode.shared.edits.dir 2>&-)
case "${SHARED_EDITS_DIR}" in
qjournal://*)
JOURNAL_NODES=$(echo "${SHARED_EDITS_DIR}" | sed 's,qjournal://\([^/]*\)/.*,\1,g; s/;/ /g; s/:[0-9]*//g')
echo "Starting journal nodes [${JOURNAL_NODES}]"
"${HADOOP_HDFS_HOME}/bin/hdfs" \
--slaves \
--config "${HADOOP_CONF_DIR}" \
--hostnames "${JOURNAL_NODES}" \
--daemon start \
journalnode
;;
esac
#---------------------------------------------------------
# ZK Failover controllers, if auto-HA is enabled
AUTOHA_ENABLED=$("${HADOOP_HDFS_HOME}/bin/hdfs" getconf -confKey dfs.ha.automatic-failover.enabled | tr '[:upper:]' '[:lower:]')
if [[ "${AUTOHA_ENABLED}" = "true" ]]; then
echo "Starting ZK Failover Controllers on NN hosts [${NAMENODES}]"
"${HADOOP_HDFS_HOME}/bin/hdfs" \
--slaves \
--config "${HADOOP_CONF_DIR}" \
--hostnames "${NAMENODES}" \
--daemon start \
zkfc
fi
# eof