#!/bin/bash
####################################################
#
# A simple script to auto-install Zenoss Core 4.2
#
# This script should be run on a base install of
# CentOS 5/6 or RHEL 5/6.
#
###################################################

cat <<EOF
Welcome to the Zenoss Core auto-deploy script!

This auto-deploy script installs the Oracle Java Runtime Environment (JRE).
To continue, please review and accept the Oracle Binary Code License Agreement
for Java SE.

Press Enter to continue.
EOF
read
less licenses/Oracle-BCLA-JavaSE
while true; do
    read -p "Do you accept the Oracle Binary Code License Agreement for Java SE?" yn
    case $yn in
        [Yy]* ) echo "Install continues...."; break;;
        [Nn]* ) echo "Installation aborted."; exit;;
        * ) echo "Please answer yes or no.";;
    esac
done

pushd `dirname $0` > /dev/null
SCRIPTPATH=`pwd`
popd > /dev/null

umask 022
# this may or may not be helpful for an install issue some people are having, but shouldn't hurt:
unalias -a

if [ -L /opt/zenoss ]; then
	echo "/opt/zenoss appears to be a symlink. Please remove and re-run this script."
	exit 1
fi

if [ `rpm -qa | egrep -c -i "^mysql-"` -gt 0 ]; then
cat << EOF

It appears that the distro-supplied version of MySQL is at least partially installed,
or a prior installation attempt failed.

Please remove these packages, as well as their dependencies (often postfix), and then
retry this script:

$(rpm -qa | egrep -i "^mysql-")

EOF
exit 1
fi

try() {
	"$@"
	if [ $? -ne 0 ]; then
		echo "Command failure: $@"
		exit 1
	fi
}

die() {
	echo $*
	exit 1
}

disable_repo() {
	local conf=/etc/yum.repos.d/$1.repo
	if [ ! -e "$conf" ]; then
		echo "Yum repo config $conf not found -- exiting."
		exit 1
	else
		sed -i -e 's/^enabled.*/enabled = 0/g' $conf
	fi
}

enable_service() {
	try /sbin/chkconfig $1 on
	try /sbin/service $1 start
}

#Now that RHEL6 RPMs are released, lets try to be smart and pick RPMs based on that
if [ -f /etc/redhat-release ]; then
	elv=`cat /etc/redhat-release | gawk 'BEGIN {FS="release "} {print $2}' | gawk 'BEGIN {FS="."} {print $1}'`
	#EnterpriseLinux Version String. Just a shortcut to be used later
	els=el$elv
else
	#Bail
	echo "Unable to determine version. I can't continue"
	exit 1
fi

# MySQL's official download RPM has different naming for RHEL 5...

if [ "$elv" = "5" ]; then
	myels="rhel5"
else
	myels="el$elv"
fi


echo "Ensuring Zenoss RPMs are not already present"
if [ `rpm -qa | grep -c -i ^zenoss` -gt 0 ]; then
	echo "I see Zenoss Packages already installed. I can't handle that"
	exit 1
fi

MYTMP="$(PATH=/sbin:/usr/sbin:/bin:/usr/bin mktemp -d)"
cd $MYTMP || die "Couldn't change to temporary directory"
#Disable SELinux:

echo "Disabling SELinux..."
if [ -e /selinux/enforce ]; then
	echo 0 > /selinux/enforce
fi

if [ -e /etc/selinux/config ]; then
	sed -i -e 's/^SELINUX=.*/SELINUX=disabled/g' /etc/selinux/config
fi

openjdk="$(rpm -qa | grep java.*openjdk)"
if [ -n "$openjdk" ]; then
	echo "Attempting to remove existing OpenJDK..."
	try rpm -e $openjdk
fi

# Defaults for user provided input
arch="x86_64"
# ftp mirror for MySQL to use for version auto-detection:
mysql_ftp_mirror="ftp://mirror.anl.gov/pub/mysql/Downloads/MySQL-5.5/"

# Auto-detect latest build:
build=4.2.5-2108
rmqv=2.8.7
zenoss_base_url="http://downloads.sourceforge.net/project/zenoss/zenoss-4.2/zenoss-4.2.5"
zenoss_rpm_file="zenoss_core-$build.$els.$arch.rpm"

# Let's grab Zenoss first...

zenoss_gpg_key="http://dev.zenoss.org/yum/RPM-GPG-KEY-zenoss"
for url in $zenoss_base_url/$zenoss_rpm_file; do
	# This will skip download if RPM exists in temp dir, or if user has pre-downloaded the RPM
	# and placed it in the same directory as the core-autodeploy script. The RPM install parts
	# have also been modified to use the pre-downloaded version if available.
	if [ ! -f "${url##*/}" ] && [ ! -f "$SCRIPTPATH/${url##*/}" ];then
		echo "Downloading ${url##*/}..."
		try wget -N $url
	fi
done

if [ `rpm -qa gpg-pubkey* | grep -c "aa5a1ad7-4829c08a"` -eq 0  ];then
	echo "Importing Zenoss GPG Key"
	try rpm --import $zenoss_gpg_key
fi

#MySQL 5.29 creates dependancy issues, we'll force 5.28 for the remainder of the life of 4.2
try rm -f .listing
try wget --no-remove-listing $mysql_ftp_mirror >/dev/null 2>&1
#mysql_v="5.5.37-1"
if [ -e .listing ] && [ -z "$mysql_v" ]; then
	echo "Auto-detecting most recent MySQL Community release"
	# note: .listing won't be created if you going thru a proxy server(e.g. squid)
	mysql_v=`cat .listing | awk '{ print $9 }' | grep MySQL-client | grep $myels.x86_64.rpm | sort | tail -n 1`
	# tweaks to isolate MySQL version:
	mysql_v="${mysql_v##MySQL-client-}"
	mysql_v="${mysql_v%%.$myels.*}"
	echo "Auto-detected version $mysql_v"
else
	echo "Using MySQL Community Release version $mysql_v"
fi
jre_file="jre-6u31-linux-x64-rpm.bin"
jre_url="http://javadl.sun.com/webapps/download/AutoDL?BundleId=59622"
mysql_client_rpm="MySQL-client-$mysql_v.linux2.6.x86_64.rpm"
mysql_server_rpm="MySQL-server-$mysql_v.linux2.6.x86_64.rpm"
mysql_shared_rpm="MySQL-shared-$mysql_v.linux2.6.x86_64.rpm"
mysql_compat_rpm="MySQL-shared-compat-$mysql_v.linux2.6.x86_64.rpm"
epel_rpm_url=http://dl.fedoraproject.org/pub/epel/$elv/$arch

echo "Installing EPEL Repo"
wget -r -l1 --no-parent -A 'epel*.rpm' $epel_rpm_url
try yum -y --nogpgcheck localinstall */pub/epel/$elv/$arch/epel-*.rpm
disable_repo epel

echo "Installing RabbitMQ"
try wget http://www.rabbitmq.com/releases/rabbitmq-server/v${rmqv}/rabbitmq-server-${rmqv}-1.noarch.rpm
try yum --enablerepo=epel -y --nogpgcheck localinstall rabbitmq-server-${rmqv}-1.noarch.rpm
# Scientific Linux 6 includes AMQP daemon -> qpidd stop it before starting rabbitmq
if [ -e /etc/init.d/qpidd ]; then
       try /sbin/service qpidd stop
       try /sbin/chkconfig qpidd off
fi
enable_service rabbitmq-server

echo "Downloading Files"
if [ ! -f $jre_file ];then
	echo "Downloading Oracle JRE"
	try wget -N -O $jre_file $jre_url
	try chmod +x $jre_file
fi
echo "Installing JRE"
try ./$jre_file

echo "Downloading and installing MySQL RPMs"
for file in $mysql_client_rpm $mysql_server_rpm $mysql_shared_rpm $mysql_compat_rpm;
do
	if [ ! -f $file ];then
		try wget -N http://wiki.zenoss.org/download/core/mysql/$file
	fi
	if [ ! -f $file ];then
		echo "Failed to download $file. I can't continue"
		exit 1
	fi
	try yum -y --nogpgcheck localinstall $file
done

echo "Installing optimal /etc/my.cnf settings"
cat >> /etc/my.cnf << EOF
[mysqld]
max_allowed_packet=16M
innodb_buffer_pool_size = 256M
innodb_additional_mem_pool_size = 20M
EOF

echo "Configuring MySQL"
enable_service mysql
/usr/bin/mysqladmin -u root password ''
/usr/bin/mysqladmin -u root -h localhost password ''

# set up rrdtool, etc.

echo "Enabling rpmforge repo..."
try wget http://apt.sw.be/redhat/$els/en/$arch/rpmforge/RPMS/rpmforge-release-0.5.2-2.$els.rf.$arch.rpm
try yum --nogpgcheck -y localinstall rpmforge-release-0.5.2-2.$els.rf.$arch.rpm
disable_repo rpmforge

echo "Installing rrdtool"
try yum -y --enablerepo='rpmforge*' install rrdtool-1.4.7

echo "Installing Zenoss"
if [ -e $zenoss_rpm_file ]; then
	try yum -y localinstall --enablerepo=epel $zenoss_rpm_file
else
	# If already downloaded by user and manually placed next to core-autodeploy.sh, use that RPM instead.
	try yum -y localinstall --enablerepo=epel $SCRIPTPATH/$zenoss_rpm_file
fi

try cp $SCRIPTPATH/secure_zenoss.sh /opt/zenoss/bin/
try chown zenoss:zenoss /opt/zenoss/bin/secure_zenoss.sh
try chmod 0700 /opt/zenoss/bin/secure_zenoss.sh

echo "Securing Zenoss"
try su -l -c /opt/zenoss/bin/secure_zenoss.sh zenoss

try cp $SCRIPTPATH/zenpack_actions.txt /opt/zenoss/var

echo "Configuring and Starting some Base Services and Zenoss..."
for service in memcached snmpd zenoss; do
	try /sbin/chkconfig $service on
	try /sbin/service $service start
done

echo "Securing configuration files..."
try chmod -R go-rwx /opt/zenoss/etc

cat << EOF
Zenoss Core $build install completed successfully!

Please visit http://127.0.0.1:8080 in your favorite Web browser to complete
setup.

NOTE: You may need to disable or modify this server's firewall to access port
8080. To disable this system's firewall, type:

# service iptables save
# service iptables stop
# chkconfig iptables off

Alternatively, you can modify your firewall to enable incoming connections to
port 8080. Here is a full list of all the ports Zenoss accepts incoming
connections from, and their purpose:

	8080 (TCP)                 Web user interface
	11211 (TCP and UDP)        memcached
	514 (UDP)                  syslog
	162 (UDP)                  SNMP traps


If you encounter problems with this script, please report them on the
following wiki page:

http://wiki.zenoss.org/index.php?title=Talk:Install_Zenoss

Thank you for using Zenoss. Happy monitoring!
EOF