lucene/src/scripts/snapinstaller

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#!/bin/bash
#
# Copyright 2006 The Apache Software Foundation
#
# Licensed 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.
#
# Shell script to install a snapshot into place as the Lucene collection
# for a Solr server
orig_dir=$(pwd)
cd ${0%/*}/..
solr_root=$(pwd)
cd ${orig_dir}
unset master_host master_status_dir data_dir user verbose
. ${solr_root}/bin/scripts-util
# set up variables
prog=${0##*/}
log=${solr_root}/logs/${prog}.log
# define usage string
USAGE="\
usage: $prog [-M master] [-S sdir] [-d dir] [-u username] [-v]
-M master specify hostname of master server from where to pull index
snapshot
-S specify directory holding snapshot status on master server
-d specify directory holding index data on local machine
-u specify user to sudo to before running script
-v increase verbosity
"
# parse args
while getopts M:S:d:u:v OPTION
do
case $OPTION in
M)
master_host="$OPTARG"
;;
S)
master_status_dir="$OPTARG"
;;
d)
data_dir="$OPTARG"
;;
u)
user="$OPTARG"
;;
v)
verbose="v"
;;
*)
echo "$USAGE"
exit 1
esac
done
if [[ -z ${master_host} ]]
then
echo "name of master server missing in $confFile or command line."
echo "$USAGE"
exit 1
fi
if [[ -z ${master_status_dir} ]]
then
echo "directory holding snapshot status on master server missing in $confFile or command line."
echo "$USAGE"
exit 1
fi
fixUser "$@"
# use default value for data_dir if not specified
# relative path starts at ${solr_root}
if [[ -z ${data_dir} ]]
then
data_dir=${solr_root}/data
elif [[ "`echo ${data_dir}|cut -c1`" != "/" ]]
then
data_dir=${solr_root}/${data_dir}
fi
# assume relative path to start at ${solr_root}
if [[ "`echo ${master_status_dir}|cut -c1`" != "/" ]]
then
master_status_dir=${solr_root}/${master_status_dir}
fi
start=`date +"%s"`
logMessage started by $oldwhoami
logMessage command: $0 $@
# get directory name of latest snapshot
name=`find ${data_dir} -name snapshot.* -print|grep -v wip|sort -r|head -1`
# clean up after INT/TERM
trap 'echo "caught INT/TERM, exiting now but partial installation may have already occured";/bin/rm -rf ${data_dir"/index.tmp$$;logExit aborted 13' INT TERM
# is there a snapshot
if [[ "${name}" == "" ]]
then
logMessage no shapshot available
logExit ended 0
fi
# has snapshot already been installed
if [[ ${name} == `cat ${solr_root}/logs/snapshot.current 2>/dev/null` ]]
then
logMessage latest snapshot ${name} already installed
logExit ended 0
fi
# make sure master has directory for hold slaves stats/state
if
! ssh -o StrictHostKeyChecking=no ${master_host} mkdir -p ${master_status_dir}
then
logMessage failed to ssh to master ${master_host}, snapshot status not updated on master
fi
# install using hard links into temporary directory
# remove original index and then atomically copy new one into place
logMessage installing snapshot ${name}
cp -lr ${name}/ ${data_dir}/index.tmp$$
/bin/rm -rf ${data_dir}/index
mv -f ${data_dir}/index.tmp$$ ${data_dir}/index
# update distribution stats
echo ${name} > ${solr_root}/logs/snapshot.current
# push stats/state to master
if
! scp -q -o StrictHostKeyChecking=no ${solr_root}/logs/snapshot.current ${master_host}:${master_status_dir}/snapshot.current.`uname -n`
then
logMessage failed to ssh to master ${master_host}, snapshot status not updated on master
fi
# notify Solr to open a new Searcher
logMessage notifing Solr to open a new Searcher
${solr_root}/bin/commit
if [[ $? != 0 ]]
then
logMessage failed to connect to Solr server
logMessage snapshot installed but Solr server has not open a new Searcher
logExit failed 1
fi
logExit ended 0