utils/install_server.sh

   1 #!/bin/sh
   2
   3 # Copyright 2011 Dvir Volk <dvirsk at gmail dot com>. All rights reserved.
   4 #
   5 # Redistribution and use in source and binary forms, with or without
   6 # modification, are permitted provided that the following conditions are met:
   7 #
   8 #   1. Redistributions of source code must retain the above copyright notice,
   9 #   this list of conditions and the following disclaimer.
  10 #
  11 #   2. Redistributions in binary form must reproduce the above copyright
  12 #   notice, this list of conditions and the following disclaimer in the
  13 #   documentation and/or other materials provided with the distribution.
  14 #
  15 # THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  16 # WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  17 # MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
  18 # EVENT SHALL Dvir Volk OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  19 # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  20 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
  21 # OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  22 # LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  23 # NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
  24 # EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25 #
  26 ################################################################################
  27 #
  28 # Interactive service installer for redis server
  29 # this generates a redis config file and an /etc/init.d script, and installs them
  30 # this scripts should be run as root
  31
  32 die () {
  33         echo "ERROR: $1. Aborting!"
  34         exit 1
  35 }
  36
  37 #Initial defaults
  38 _REDIS_PORT=6379
  39
  40 echo "Welcome to the redis service installer"
  41 echo "This script will help you easily set up a running redis server
  42
  43 "
  44
  45 #check for root user TODO: replace this with a call to "id"
  46 if [ `whoami` != "root" ] ; then
  47         echo "You must run this script as root. Sorry!"
  48         exit 1
  49 fi
  50
  51
  52 #Read the redis port
  53 read  -p "Please select the redis port for this instance: [$_REDIS_PORT] " REDIS_PORT
  54 if [ ! `echo $REDIS_PORT | egrep "^[0-9]+\$"`  ] ; then
  55         echo "Selecting default: $_REDIS_PORT"
  56         REDIS_PORT=$_REDIS_PORT
  57 fi
  58
  59 #read the redis config file
  60 _REDIS_CONFIG_FILE="/etc/redis/$REDIS_PORT.conf"
  61 read -p "Please select the redis config file name [$_REDIS_CONFIG_FILE] " REDIS_CONFIG_FILE
  62 if [ !"$REDIS_CONFIG_FILE" ] ; then
  63         REDIS_CONFIG_FILE=$_REDIS_CONFIG_FILE
  64         echo "Selected default - $REDIS_CONFIG_FILE"
  65 fi
  66 #try and create it
  67 mkdir -p `dirname "$REDIS_CONFIG_FILE"` || die "Could not create redis config directory"
  68
  69 #read the redis log file path
  70 _REDIS_LOG_FILE="/var/log/redis_$REDIS_PORT.log"
  71 read -p "Please select the redis log file name [$_REDIS_LOG_FILE] " REDIS_LOG_FILE
  72 if [ !"$REDIS_LOG_FILE" ] ; then
  73         REDIS_LOG_FILE=$_REDIS_LOG_FILE
  74         echo "Selected default - $REDIS_LOG_FILE"
  75 fi
  76
  77
  78 #get the redis data directory
  79 _REDIS_DATA_DIR="/var/lib/redis/$REDIS_PORT"
  80 read -p "Please select the data directory for this instance [$_REDIS_DATA_DIR] " REDIS_DATA_DIR
  81 if [ !"$REDIS_DATA_DIR" ] ; then
  82         REDIS_DATA_DIR=$_REDIS_DATA_DIR
  83         echo "Selected default - $REDIS_DATA_DIR"
  84 fi
  85 mkdir -p $REDIS_DATA_DIR || die "Could not create redis data directory"
  86
  87 #get the redis executable path
  88 _REDIS_EXECUTABLE=`which redis-server`
  89 read -p "Please select the redis executable path [$_REDIS_EXECUTABLE] " REDIS_EXECUTABLE
  90 if [ ! -f "$REDIS_EXECUTABLE" ] ; then
  91         REDIS_EXECUTABLE=$_REDIS_EXECUTABLE
  92
  93         if [ ! -f "$REDIS_EXECUTABLE" ] ; then
  94                 echo "Mmmmm...  it seems like you don't have a redis executable. Did you run make install yet?"
  95                 exit 1
  96         fi
  97
  98 fi
  99
 100
 101 #render the tmplates
 102 TMP_FILE="/tmp/$REDIS_PORT.conf"
 103 DEFAULT_CONFIG="../redis.conf"
 104 INIT_TPL_FILE="./redis_init_script.tpl"
 105 INIT_SCRIPT_DEST="/etc/init.d/redis_$REDIS_PORT"
 106 PIDFILE="/var/run/redis_$REDIS_PORT.pid"
 107
 108
 109
 110 #check the default for redis cli
 111 CLI_EXEC=`which redis-cli`
 112 if [ ! "$CLI_EXEC" ] ; then
 113         CLI_EXEC=`dirname $REDIS_EXECUTABLE`"/redis-cli"
 114 fi
 115
 116 #Generate config file from the default config file as template
 117 #changing only the stuff we're controlling from this script
 118 echo "## Generated by install_server.sh ##" > $TMP_FILE
 119
 120 SED_EXPR="s#^port [0-9]{4}\$#port ${REDIS_PORT}#;\
 121 s#^logfile .+\$#logfile ${REDIS_LOG_FILE}#;\
 122 s#^dir .+\$#dir ${REDIS_DATA_DIR}#;\
 123 s#^pidfile .+\$#pidfile ${PIDFILE}#;\
 124 s#^daemonize no\$#daemonize yes#;"
 125 echo $SED_EXPR
 126 sed -r "$SED_EXPR" $DEFAULT_CONFIG  >> $TMP_FILE
 127
 128 #cat $TPL_FILE | while read line; do eval "echo \"$line\"" >> $TMP_FILE; done
 129 cp -f $TMP_FILE $REDIS_CONFIG_FILE || exit 1
 130
 131 #Generate sample script from template file
 132 rm -f $TMP_FILE
 133
 134 #we hard code the configs here to avoid issues with templates containing env vars
 135 #kinda lame but works!
 136 REDIS_INIT_HEADER=\
 137 "#/bin/sh\n
 138 #Configurations injected by install_server below....\n\n
 139 EXEC=$REDIS_EXECUTABLE\n
 140 CLIEXEC=$CLI_EXEC\n
 141 PIDFILE=$PIDFILE\n
 142 CONF=\"$REDIS_CONFIG_FILE\"\n\n
 143 REDISPORT=\"$REDIS_PORT\"\n\n
 144 ###############\n\n"
 145
 146 REDIS_CHKCONFIG_INFO=\
 147 "# REDHAT chkconfig header\n\n
 148 # chkconfig: - 58 74\n
 149 # description: redis_6379 is the redis daemon.\n
 150 ### BEGIN INIT INFO\n
 151 # Provides: redis_6379\n
 152 # Required-Start: $network $local_fs $remote_fs\n
 153 # Required-Stop: $network $local_fs $remote_fs\n
 154 # Should-Start: $syslog $named\n
 155 # Should-Stop: $syslog $named\n
 156 # Short-Description: start and stop redis_6379\n
 157 # Description: Redis daemon\n
 158 ### END INIT INFO\n\n"
 159
 160 if [ !`which chkconfig` ] ; then
 161         #combine the header and the template (which is actually a static footer)
 162         echo $REDIS_INIT_HEADER > $TMP_FILE && cat $INIT_TPL_FILE >> $TMP_FILE || die "Could not write init script to $TMP_FILE"
 163 else
 164         #if we're a box with chkconfig on it we want to include info for chkconfig
 165         echo -e $REDIS_INIT_HEADER $REDIS_CHKCONFIG_INFO > $TMP_FILE && cat $INIT_TPL_FILE >> $TMP_FILE || die "Could not write init script to $TMP_FILE"
 166 fi
 167
 168 #copy to /etc/init.d
 169 cp -f $TMP_FILE $INIT_SCRIPT_DEST && chmod +x $INIT_SCRIPT_DEST || die "Could not copy redis init script to  $INIT_SCRIPT_DEST"
 170 echo "Copied $TMP_FILE => $INIT_SCRIPT_DEST"
 171
 172 #Install the service
 173 echo "Installing service..."
 174 if [ !`which chkconfig` ] ; then
 175         #if we're not a chkconfig box assume we're able to use update-rc.d
 176         update-rc.d redis_$REDIS_PORT defaults && echo "Success!"
 177 else
 178         # we're chkconfig, so lets add to chkconfig and put in runlevel 345
 179         chkconfig --add redis_$REDIS_PORT && echo "Successfully added to chkconfig!"
 180         chkconfig --level 345 redis_$REDIS_PORT on && echo "Successfully added to runlevels 345!"
 181 fi
 182
 183 /etc/init.d/redis_$REDIS_PORT start || die "Failed starting service..."
 184
 185 #tada
 186 echo "Installation successful!"
 187 exit 0
 188