pcs_setup

#!/bin/bash

########################################
#Date: 23rd March 2017                 #
#Author: Vineet Sinha                  #
#Script to deploy pacemaker in RHEL 7  #
########################################

#
#Check if file exists that contains IP addressed of nodes to form cluster
#

if [ -f /var/tmp/ips ]
  
  then `cat /dev/null > /var/tmp/ips`

else touch  /var/tmp/ips

fi

#Script USage help

if [ "$#" -lt 2 ]
then
      echo $"usage: $0 { arg1 | arg2 }
                where:
                arg1 name of the cluster
                arg2 number of nodes in cluster"
      exit 1

fi

NAME=$1;
count=$2;
counter=0;


while [[ $counter -lt $count ]];
do
echo -e "\n\n ******Enter Ip addresses of hosts to be added in cluster******\n\n";

read  -p "Ip address:" IP

echo -ne "Ip:$IP\t"  >> /var/tmp/ips

((count--))

done

###################################
#Check Ip addresses are reachable#
###################################


for i in `cat /var/tmp/ips | tr -d "Ip:"`

do
ping -c1 -q $i &>/dev/null

if [ $? == 0 ] ; then

    echo -e "\n\n****** IP ping success!******\n\n"

else

    echo -e "\n\n****** IP ping failure******\n\n"

    exit
fi

done

#
# Check system is registered to RHSM and cluster repos are enabled.
# Check for cluster package, if not present install packages.
# Note - ensure subscription-manager package is upto date.
# With version subscription-manager-1.13.22-1, registration may not be successful in first attempt.
#

if [ -f /var/tmp/rhsm_logs ]

  then `cat /dev/null > /var/tmp/rhsm_logs`

else touch  /var/tmp/rhsm_logs

fi

echo -e "\nSubscription Manager registration will start if host is not registered. This will take sometime.. \n"

echo  -e "\n\n******Enter rhsm username ******\n\n"

read -p "RHSM username:" username

echo -e "\n\n*****Enter rhsm password *****\n\n"

read  -p "password:" -s password

echo -e "\n\n"
for i in `cat /var/tmp/ips | tr -d "Ip:"`
do

ssh -o "UserKnownHostsFile=no" -o "StrictHostKeyChecking=no" root@$i -t -t "echo -e "\n\n";\
echo -e " ******RHSM and Package phase..This will take some time...*******";\
subscription-manager register --username=$username --password=$password;\
subscription-manager attach --pool=8a85f9833e1404a9013e3cddf99305e6;\
subscription-manager repos --disable=*;\
subscription-manager repos --enable rhel-7-server-rpms --enable rhel-rs-for-rhel-7-server-rpms;\
yum install -y -q pcs fence-agents-all gfs2-utils;"

done >> /var/tmp/rhsm_logs 2>&1

############################################
#Set FQDN and update hosts file on each node#
############################################

if [ -f /var/tmp/hosts ]

  then `cat /dev/null > /var/tmp/hosts`

else touch  /var/tmp/hosts

fi



for i in `cat /var/tmp/ips | tr -d "Ip:"`
do
echo -e "\n\n Enter FQDN of $i \n\n";
read -p "FQDN:" FQDN;echo "$i $FQDN ">> /var/tmp/hosts;
done


for  i in `cat /var/tmp/ips | tr -d "Ip:"`
do
echo -e "\n\n";\
echo -e "****** Updating hosts file of nodes ******* "
cat "/var/tmp/hosts" | ssh root@$i "cat  >> /etc/hosts"
done



############################
#Setup and Install cluster#
############################

# If log file exists, nullify for each cluster setup

if [ -f /var/tmp/setup_logs ]

  then `cat /dev/null > /var/tmp/setup_logs`

else touch  /var/tmp/setup_logs

fi


for i in `cat /var/tmp/ips | tr -d "Ip:"`
do
 ssh -o "UserKnownHostsFile=no" -o "StrictHostKeyChecking=no" root@$i -t -t "echo  -e " ****** PCS setup and Install phase.. *******  ";\
echo "hacluster" | passwd hacluster --stdin;\
systemctl stop firewalld.service;systemctl disable firewalld.service;\
setenforce 0;\
systemctl start pcsd.service;systemctl enable pcsd.service;\
echo -e "**************";"

done >> /var/tmp/setup_logs 2>&1

NodesIP=`cat /var/tmp/ips | tr -d "Ip:"|awk '{print $1}'`

ssh -o "UserKnownHostsFile=/dev/null" -o "StrictHostKeyChecking=no" $NodesIP -t -t \
"pcs cluster auth `awk '{ORS=" " } {print $2}' /var/tmp/hosts` -u hacluster -p hacluster;\
pcs cluster setup --name $NAME `awk '{ORS=" " } {print $2}' /var/tmp/hosts`;\
pcs cluster start --all;pcs cluster enable --all;"