Install MongoDB on Centos 7

#!/bin/bash
#######################
#mongodb简介
#mongodb是个非关系型数据库，但操作跟关系型数据最类似。MysqL是关系型数据库
#mongodb是面向文档存储的非关系型数据库，数据以json的格式进行存储
#mongodb可用来永久存储，也可用来缓存数据
#mongodb提供副本集和分片集群功能，操作简单
#############################
if [ `whoami` != root ]
then
echo "Please login as root to continue :)"
exit 1
fi

if [ ! -d /home/tools/ ];then
mkdir -p /home/tools
else
rm -rf /home/tools && mkdir -p /home/tools
fi

#Prohibit memory giant pages
echo 'never' >/sys/kernel/mm/transparent_hugepage/enabled
echo 'never' >/sys/kernel/mm/transparent_hugepage/defrag

#Add commands to /etc/rc.local
chmod +x /etc/rc.d/rc.local
echo "echo 'never' >/sys/kernel/mm/transparent_hugepage/enabled" >>/etc/rc.local
echo "echo 'never' >/sys/kernel/mm/transparent_hugepage/defrag" >>/etc/rc.local

#disable firewall and selinux
sed -i '/SELINUX/s/enforcing/disabled/' /etc/selinux/config 
systemctl disable firewalld.service

#Setting Handles Number and Process
cat >> /etc/security/limits.conf << EOF
*          soft   nofile    204800
*          hard   nofile    204800
*          soft   nproc     204800
*          hard   nproc     204800
EOF

sed -i 's/4096/204800/g' /etc/security/limits.d/20-nproc.conf

#download mongodb on centos 7
cd /home/tools && wget -c https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-rhel70-4.0.6.tgz

#install mongodb 
tar zxvf mongodb-linux-x86_64-rhel70-4.0.6.tgz
mv mongodb-linux-x86_64-rhel70-4.0.6 /usr/local/mongodb-linux-x86_64-rhel70-4.0.6
ln -s /usr/local/mongodb-linux-x86_64-rhel70-4.0.6 /usr/local/mongodb

#Create data directory
mkdir -p /data/mongodb/27017/

cat > /data/mongodb/27017/mongodb.conf <<EOF
systemLog:
  destination: file
  logAppend: true
  path: /data/mongodb/27017/mongodb.log
storage:
  dbPath: /data/mongodb/27017/
  journal:
    enabled: true
processManagement:
  fork: true
net:
  port: 27017
  bindIp: 0.0.0.0
EOF

#Add mongodb users and setting permission
useradd mongodb && chown -R mongodb.mongodb /data/mongodb/ /usr/local/mongodb/

#Add autoStart script
cat >/etc/init.d/mongodb <<EOF
#!/bin/bash
# Description:mongodb ORS SERVER
# chkconfig: - 85 15
# Written by jerry
MONGODB_EXEC="/usr/local/mongodb/bin/mongod"
MONGODB_DATA="/data/mongodb/27017/"
MONGODB_CONF="/data/mongodb/27017/mongodb.conf"
PORT=\$(netstat -tunlp|grep 27017|awk '{print \$4}'|cut -d ':' -f2)
MONGODB_USER=mongodb
case \$1 in
        start)
        echo -n "Starting mongodb..."
        if [[ \$PORT = 27017 ]];then
        echo "mongodb is alreday running!"
        else
        /bin/su - \$MONGODB_USER -s /bin/bash -c "\$MONGODB_EXEC -f \$MONGODB_CONF"
        fi
        echo " done"
        ;;
        stop)
        echo -n "Stoping mongodb..."
        /bin/su - \$MONGODB_USER -s /bin/bash -c "\$MONGODB_EXEC --shutdown  --dbpath \$MONGODB_DATA"
        echo " done"
        ;;
        restart)
        \$0 stop
        \$0 start
        ;;
        status)
        if [[ \$PORT != 27017 ]];then
             echo "mongodb is not running!"
        else
             echo "mongodb is running!"
        fi
        ;;
        *)
        echo "Usage: \$0"
        exit 1
esac
EOF

#Setting environment variables
cat >/etc/profile.d/mongodb.sh<<EOF
export MONGODB_HOME=/usr/local/mongodb
export PATH=\$PATH:\$MONGODB_HOME/bin
EOF

source /etc/profile.d/mongodb.sh

#Add permission to /etc/init.d/mongodb
chmod +x /etc/init.d/mongodb

#Add to chkconfig service
chkconfig --add mongodb

#Setting up MongoDB auto-start
chkconfig mongodb on

#Start MongoDB
service mongodb start