utils/install_server.sh

   1 #!/bin/bash
   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: $1. Aborting!"
  34         exit 1
  35 }
  36
  37 #Initial defaults
  38 _REDIS_PORT=6379
  39
  40 echo "Welcome to the redis service installer"
  41 echo "This script will help you easily set up a running redis server
  42
  43 "
  44
  45 #check for root user TODO: replace this with a call to "id"
  46 if [ `whoami` != "root" ] ; then
  47         echo "You must run this script as root. Sorry!"
  48         exit 1
  49 fi
  50
  51 #Read the redis port
  52 read  -p "Please select the redis port for this instance: [$_REDIS_PORT] " REDIS_PORT
  53 if [ ! `echo $REDIS_PORT | egrep "^[0-9]+\$"`  ] ; then
  54         echo "Selecting default: $_REDIS_PORT"
  55         REDIS_PORT=$_REDIS_PORT
  56 fi
  57
  58 #read the redis config file
  59 _REDIS_CONFIG_FILE="/etc/redis/$REDIS_PORT.conf"
  60 read -p "Please select the redis config file name [$_REDIS_CONFIG_FILE] " REDIS_CONFIG_FILE
  61 if [ !"$REDIS_CONFIG_FILE" ] ; then
  62         REDIS_CONFIG_FILE=$_REDIS_CONFIG_FILE
  63         echo "Selected default - $REDIS_CONFIG_FILE"
  64 fi
  65 #try and create it
  66 mkdir -p `dirname "$REDIS_CONFIG_FILE"` || die "Could not create redis config directory"
  67
  68 #read the redis log file path
  69 _REDIS_LOG_FILE="/var/log/redis_$REDIS_PORT.log"
  70 read -p "Please select the redis log file name [$_REDIS_LOG_FILE] " REDIS_LOG_FILE
  71 if [ !"$REDIS_LOG_FILE" ] ; then
  72         REDIS_LOG_FILE=$_REDIS_LOG_FILE
  73         echo "Selected default - $REDIS_LOG_FILE"
  74 fi
  75
  76
  77 #get the redis data directory
  78 _REDIS_DATA_DIR="/var/lib/redis/$REDIS_PORT"
  79 read -p "Please select the data directory for this instance [$_REDIS_DATA_DIR] " REDIS_DATA_DIR
  80 if [ !"$REDIS_DATA_DIR" ] ; then
  81         REDIS_DATA_DIR=$_REDIS_DATA_DIR
  82         echo "Selected default - $REDIS_DATA_DIR"
  83 fi
  84 mkdir -p $REDIS_DATA_DIR || die "Could not create redis data directory"
  85
  86 #get the redis executable path
  87 _REDIS_EXECUTABLE=`which redis-server`
  88 read -p "Please select the redis executable path [$_REDIS_EXECUTABLE] " REDIS_EXECUTABLE
  89 if [ ! -f "$REDIS_EXECUTABLE" ] ; then
  90         REDIS_EXECUTABLE=$_REDIS_EXECUTABLE
  91
  92         if [ ! -f "$REDIS_EXECUTABLE" ] ; then
  93                 echo "Mmmmm...  it seems like you don't have a redis executable. Did you run make install yet?"
  94                 exit 1
  95         fi
  96
  97 fi
  98
  99
 100 #render the tmplates
 101 TMP_FILE="/tmp/$REDIS_PORT.conf"
 102 TPL_FILE="./redis.conf.tpl"
 103 INIT_TPL_FILE="./redis_init_script.tpl"
 104 INIT_SCRIPT_DEST="/etc/init.d/redis_$REDIS_PORT"
 105 PIDFILE="/var/run/redis_$REDIS_PORT.pid"
 106
 107
 108
 109 #check the default for redis cli
 110 CLI_EXEC=`which redis-cli`
 111 if [ ! "$CLI_EXEC" ] ; then
 112         CLI_EXEC=`dirname $REDIS_EXECUTABLE`"/redis-cli"
 113 fi
 114
 115 #Generate config file from template
 116 echo "## Generated by install_server.sh ##" > $TMP_FILE
 117 cat $TPL_FILE | while read line; do eval "echo \"$line\"" >> $TMP_FILE; done
 118 cp -f $TMP_FILE $REDIS_CONFIG_FILE || exit 1
 119
 120 #Generate sample script from template file
 121 rm -f $TMP_FILE
 122
 123 #we hard code the configs here to avoid issues with templates containing env vars
 124 #kinda lame but works!
 125 REDIS_INIT_HEADER=\
 126 "#/bin/sh\n
 127 #Configurations injected by install_server below....\n\n
 128 EXEC=$REDIS_EXECUTABLE\n
 129 CLIEXEC=$CLI_EXEC\n
 130 PIDFILE=$PIDFILE\n
 131 CONF=\"$REDIS_CONFIG_FILE\"\n\n
 132 REDISPORT=\"$REDIS_PORT\"\n\n
 133 ###############\n\n"
 134
 135 REDIS_CHKCONFIG_INFO=\
 136 "# REDHAT chkconfig header\n\n
 137 # chkconfig: - 58 74\n
 138 # description: redis_6379 is the redis daemon.\n
 139 ### BEGIN INIT INFO\n
 140 # Provides: redis_6379\n
 141 # Required-Start: $network $local_fs $remote_fs\n
 142 # Required-Stop: $network $local_fs $remote_fs\n
 143 # Should-Start: $syslog $named\n
 144 # Should-Stop: $syslog $named\n
 145 # Short-Description: start and stop redis_6379\n
 146 # Description: Redis daemon\n
 147 ### END INIT INFO\n\n"
 148
 149 if [[ ! `which chkconfig` ]] ; then
 150         #combine the header and the template (which is actually a static footer)
 151         echo -e $REDIS_INIT_HEADER > $TMP_FILE && cat $INIT_TPL_FILE >> $TMP_FILE || die "Could not write init script to $TMP_FILE"
 152 else
 153         #if we're a box with chkconfig on it we want to include info for chkconfig
 154         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"
 155 fi
 156
 157 #copy to /etc/init.d
 158 cp -f $TMP_FILE $INIT_SCRIPT_DEST && chmod +x $INIT_SCRIPT_DEST || die "Could not copy redis init script to  $INIT_SCRIPT_DEST"
 159 echo "Copied $TMP_FILE => $INIT_SCRIPT_DEST"
 160
 161 #Install the service
 162 echo "Installing service..."
 163 if [[ ! `which chkconfig` ]] ; then
 164         #if we're not a chkconfig box assume we're able to use update-rc.d
 165         update-rc.d redis_$REDIS_PORT defaults && echo "Success!"
 166 else
 167         # we're chkconfig, so lets add to chkconfig and put in runlevel 345
 168         chkconfig --add redis_$REDIS_PORT && echo "Successfully added to chkconfig!"
 169         chkconfig --level 345 redis_$REDIS_PORT on && echo "Successfully added to runlevels 345!"
 170 fi
 171
 172 /etc/init.d/redis_$REDIS_PORT start || die "Failed starting service..."
 173
 174 #tada
 175 echo "Installation successful!"
 176 exit 0
 177