bin/regionservers.sh

   1 #!/usr/bin/env bash
   2 #
   3 #/**
   4 # * Licensed to the Apache Software Foundation (ASF) under one
   5 # * or more contributor license agreements.  See the NOTICE file
   6 # * distributed with this work for additional information
   7 # * regarding copyright ownership.  The ASF licenses this file
   8 # * to you under the Apache License, Version 2.0 (the
   9 # * "License"); you may not use this file except in compliance
  10 # * with the License.  You may obtain a copy of the License at
  11 # *
  12 # *     http://www.apache.org/licenses/LICENSE-2.0
  13 # *
  14 # * Unless required by applicable law or agreed to in writing, software
  15 # * distributed under the License is distributed on an "AS IS" BASIS,
  16 # * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  17 # * See the License for the specific language governing permissions and
  18 # * limitations under the License.
  19 # */
  20 #
  21 # Run a shell command on all regionserver hosts.
  22 #
  23 # Environment Variables
  24 #
  25 #   HBASE_REGIONSERVERS    File naming remote hosts.
  26 #     Default is ${HADOOP_CONF_DIR}/regionservers
  27 #   HADOOP_CONF_DIR  Alternate conf dir. Default is ${HADOOP_HOME}/conf.
  28 #   HBASE_CONF_DIR  Alternate hbase conf dir. Default is ${HBASE_HOME}/conf.
  29 #   HBASE_SLAVE_SLEEP Seconds to sleep between spawning remote commands.
  30 #   HBASE_SSH_OPTS Options passed to ssh when running remote commands.
  31 #
  32 # Modelled after $HADOOP_HOME/bin/slaves.sh.
  33
  34 usage="Usage: regionservers [--config <hbase-confdir>] command..."
  35
  36 # if no args specified, show usage
  37 if [ $# -le 0 ]; then
  38   echo $usage
  39   exit 1
  40 fi
  41
  42 bin=`dirname "${BASH_SOURCE-$0}"`
  43 bin=`cd "$bin">/dev/null; pwd`
  44
  45 . "$bin"/hbase-config.sh
  46
  47 # If the regionservers file is specified in the command line,
  48 # then it takes precedence over the definition in
  49 # hbase-env.sh. Save it here.
  50 HOSTLIST=$HBASE_REGIONSERVERS
  51
  52 if [ "$HOSTLIST" = "" ]; then
  53   if [ "$HBASE_REGIONSERVERS" = "" ]; then
  54     export HOSTLIST="${HBASE_CONF_DIR}/regionservers"
  55   else
  56     export HOSTLIST="${HBASE_REGIONSERVERS}"
  57   fi
  58 fi
  59
  60 regionservers=`cat "$HOSTLIST"`
  61 if [ "$regionservers" = "localhost" ]; then
  62   "$bin"/local-regionservers.sh start 1
  63 else
  64   for regionserver in `cat "$HOSTLIST"`; do
  65     if ${HBASE_SLAVE_PARALLEL:-true}; then
  66       ssh $HBASE_SSH_OPTS $regionserver $"${@// /\\ }" \
  67         2>&1 | sed "s/^/$regionserver: /" &
  68     else # run each command serially
  69       ssh $HBASE_SSH_OPTS $regionserver $"${@// /\\ }" \
  70         2>&1 | sed "s/^/$regionserver: /"
  71     fi
  72     if [ "$HBASE_SLAVE_SLEEP" != "" ]; then
  73       sleep $HBASE_SLAVE_SLEEP
  74     fi
  75   done
  76 fi
  77
  78 wait