WANdisco Subversion MultiSite v4.1.2 Admin Guide

Tip
The script features a status check that confirms the following:
Script run with necessary permissions (root)
Confirms correct version of script is being run (for O.S.)
Perl installation
JAVA environment variable
user is valid
locates the replicator binary
shutdown script
config file
replicator running
#!/bin/bash
#
# description: Ubuntu Linux dist compatible init.d script 
#              for starting/stopping WANdisco svnreplicator daemon
#
# Copyright (c) 2006-2016 WANdisco,Inc. Pleasanton,CA,USA
# All rights reserved.
#
# Author: WANdisco Support Staff <support@wandisco.com>
#
############################################################
# MODIFY THE FOLLOWING VARIBLES TO MATCH YOUR ENVIRONMENT

export JAVA_HOME=/usr/lib/jvm/java-6-sun
WD_USER="root"
WD_INSTALL_DIR="/home/user/svnrep/svn-replicator"
# (WD_INSTALL_DIR _MUST_ end with "/svn-replicator" or errors in installation can occur.

############################################################
# DO NOT MODIFY THESE VARIABLES

# Source function library.
. /lib/lsb/init-functions

CURRENT_OS=`uname -sv`
OS_DEFINER="/etc/debian_version"
PERL_LOC="/usr/bin"
WD_AGENT_NAME="svnreplicator"
WD_SHUTDOWN="${WD_INSTALL_DIR}/bin/shutdown"
WD_AGENT_BIN="${WD_INSTALL_DIR}/bin/${WD_AGENT_NAME}"
WD_AGENT_CONF="${WD_INSTALL_DIR}/config/prefs.xml"

# Maximum number of file descriptors.
MAXFDS="65000"

############################################################

# Startup procedure.
start() {

# Checks to see if the replicator is running.
REPRUN=`ps ax | grep "${WD_AGENT_NAME}" | grep -v grep | wc -l` 
RETVAL=$?

if [ ${REPRUN} -gt 0 ]
then
  echo "The replicator is already running."
  echo "------------------------------"
else
  echo "Starting ${WD_AGENT_BIN}:"
  # Don't produce core files.
  ulimit -S -c 0 >/dev/null 2>&1
  # Set maximum number of file descriptors.
  ulimit  -n ${MAXFDS} >/dev/null 2>&1
  start-stop-daemon --start --quiet --chuid ${WD_USER} --exec ${WD_AGENT_BIN} > /dev/null 2>&1

  # Checks the last transaction and returns a value depending on success or failure.
  RETVAL=$?

  # Sleep to prevent errors in restarts.
  sleep 4

  if [ ${RETVAL} -eq 0 ] 
  then
    echo "Status Code: $RETVAL: The ${WD_AGENT_NAME} started successfully."
    echo "------------------------------"
  fi

  if [ ${RETVAL} -eq 2 ] 
  then
    echo "Status Code: $RETVAL: The ${WD_AGENT_NAME} failed to start successfully."
    status
  fi
fi
}

############################################################

# Shutdown procedure.
stop() {


REPRUN=`ps ax | grep "${WD_AGENT_NAME}" | grep -v grep | wc -l` 
RETVAL=$?

# Checks to see if the replicator is running. If it is, script will shut it down, otherwise
a message will be printed.
if [ ${REPRUN} -gt 0 ]
then
  echo "Shutting down ${WD_AGENT_NAME}"
  start-stop-daemon --start --chuid ${WD_USER} --exec ${WD_SHUTDOWN} > /dev/null 2>&1

  # Checks the last transaction and returns a value depending on success or failure.
  RETVAL=$?
  
  # Sleep to prevent errors in restarts.
  sleep 4

  if [ ${RETVAL} -eq 0 ] 
  then
    echo "Status Code: $RETVAL: The ${WD_AGENT_NAME} shutdown successfully."
    echo "------------------------------"
  fi

  if [ ${RETVAL} -eq 2 ]
  then
    echo "Status Code: $RETVAL: The ${WD_AGENT_NAME} failed to shut down successfully."
    status
  fi
else
  echo "The replicator is currently not running."
  echo "------------------------------"
fi

}

############################################################

# Replicator status checker.
status() {

echo "------------------------------"

# Checks for to make sure that the person running the script is root.

if [ `id -u` = 0 ]
then
  echo "[OK] This script is being run by root."
else
  echo "[FAIL] This script is not being run by root. Please switch the user to root
  to avoid any potential errors."
fi

echo "------------------------------"

echo "The current operating system is ${CURRENT_OS}."
# Checks the system info see if Ubuntu is installed.
if test -f "${OS_DEFINER}"
then
  echo "[OK] The current operating system is valid to run this script."
else
  echo "[FAIL] You are not running on this script on a valid operating system."
fi

echo "------------------------------"

echo "Checking ${PERL_LOC} for Perl binary."
# Checks to see if Perl is installed.
if test -f "${PERL_LOC}/perl"
then
  echo "[OK] Perl is installed on this machine."
else
  echo "[FAIL] Could not find Perl on this machine."
fi

echo "------------------------------"

echo "The Java environment variable is currently set to: ${JAVA_HOME}"
# Tests for the JAVA_HOME variable.
if test -f "${JAVA_HOME}/bin/java"
then
  echo "[OK] The JAVA_HOME variable is set correctly."
else
  echo "[FAIL] The JAVA_HOME variable is not set correctly."
fi

echo "------------------------------"

echo "The user is currently set to: ${WD_USER}"
# Tests to see if a valid user exists.
id "${WD_USER}" >/dev/null 2>&1
RETVAL=$?
if [ ${RETVAL} -eq 0 ]
then
  echo "[OK] This is a valid user."
else
  echo "[FAIL] This is not a valid user."
fi

echo "------------------------------"

# Returns the base directory of the {WD_INSTALL_DIR}.
BASE_INS_DIR=`basename ${WD_INSTALL_DIR}`

echo "The install directory is currently set to: ${WD_INSTALL_DIR}"
# Checks to see if the WD_INSTALL_DIR ends with "/svn-replicator"
if `[ "${BASE_INS_DIR}" == "svn-replicator" ]`
then
  echo "[OK] The replicator is installed to a suitable directory."
else
  echo "[FAIL] Please rename the replicator install directory to /svn-replicator to
  avoid installation errors."
fi

echo "------------------------------"

echo "The replicator binary is currently set to: ${WD_AGENT_BIN}"
# Checks to see if the replicator binary exists in the specified directory.
if test -f "${WD_AGENT_BIN}"
then
  echo "[OK] The replicator script was found successfully."
else
  echo "[FAIL] The replicator script was not found."
fi

echo "------------------------------"

echo "The shutdown script is currently set to: ${WD_SHUTDOWN}"
# Checks to see if the config file exists.
if test -f "${WD_SHUTDOWN}"
then
  echo "[OK] The shutdown script was found successfully."
else
  echo "[FAIL] The shutdown script was not found."
fi

echo "------------------------------"

echo "The config file is currently set to: ${WD_AGENT_CONF}"
# Checks to see if the config file is readable.
if test -r "${WD_AGENT_CONF}"
then
  echo "[OK] The config file could be read."
else
  echo "[FAIL] The config file could not be read."
fi

echo "------------------------------"

# Checks to see if the replicator is running.
if ps ax | grep -v grep | grep ${WD_AGENT_BIN} > /dev/null
then
  # Returns the process ID of the replicator and checks the relevent file for the file descriptors.
  PROC_ID=`pidof -sx "${WD_AGENT_BIN}"`
  FDS_LOC=`grep -i "Max open files *${MAXFDS}" /proc/${PROC_ID}/limits`
  RETVAL=$?

  echo "The attempted max number of set file descriptors is ${MAXFDS}."
  # Checks the /proc/${PROC_ID}/limits file for the file descriptors.
  if [ ${RETVAL} -eq 0 ]
  then
    echo "[OK] The file descriptors were set successfully."
    echo "------------------------------"
  else
    echo "[FAIL] The file descriptors were not set successfully."
    echo "------------------------------"
  fi
  echo "[OK] The replicator is currently running."

else
  echo "[FAIL] The replicator is currently not running."
fi

echo "------------------------------"

}

############################################################

# Restart procedure.
restart() {

  stop
  sleep 4
  start

}

############################################################

case "$1" in
start)
  start
  ;;
stop)
  stop
  ;;
status)
  status
  ;;
restart|reload)
  restart
  ;;
*)

echo $"Usage: $0 {start|stop|status|restart}"
exit 1

esac