Setup Mongodb Server on Amazon EC2

setup-mongodb.sh

#!/usr/bin/env bash
# usage: wget -N https://gist.githubusercontent.com/moshest/e4c73efc8d6a35971f6e/raw/setup-mongodb.sh && sh ./setup-mongodb.sh
set -e

# configs

read -e -p "Replica set name: " -i "rep1" replSet
read -e -p "Hostname: " -i $(curl -s http://169.254.169.254/latest/meta-data/public-hostname) hostname
read -e -p "Swap size: " -i "8G" swapsize

read -e -p "Data drive: " -i "xvdf" dataDrive
read -e -p "Journal drive: " -i "xvdg" journalDrive
read -e -p "Log drive: " -i "xvdh" logDrive

read -e -p "Config file: " -i "/etc/mongod.conf" configFile

read -p "Press [Enter] to start setup.."

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

echo "Update mechine..."
sudo yum -y update

echo "Set hostname..."
sudo hostname $hostname
sudo sed -i "/HOSTNAME\b/c\HOSTNAME=$hostname" /etc/sysconfig/network 

echo "Add swap..."

hasSwap=`grep "swapfile" /etc/fstab | cat`
if [ -z "$hasSwap" ]; then
	echo "Create swapfile of $swapsize megabytes"

	sudo fallocate -l $swapsize /swapfile
	sudo chmod 600 /swapfile
	sudo mkswap /swapfile
	sudo swapon /swapfile
	sudo sh -c "echo '/swapfile none swap defaults 0 0' >> /etc/fstab"
else
	echo 'swapfile found. No changes made.'
fi

cat /proc/swaps
cat /proc/meminfo | grep Swap


echo "Install mongodb..."

echo "[MongoDB]
name=MongoDB Repository
baseurl=http://downloads-distro.mongodb.org/repo/redhat/os/x86_64
gpgcheck=0
enabled=1" | sudo tee -a /etc/yum.repos.d/mongodb.repo

sudo yum install -y mongodb-org-server mongodb-org-shell mongodb-org-tools

sudo sed -i "/bind_ip=\b/c\bind_ip=0.0.0.0" $configFile
sudo sed -i "/replSet=\b/c\replSet=$replSet" $configFile


echo "Create mount points..."

sudo mkdir /data /log /journal

sudo mkfs.ext4 /dev/$dataDrive
sudo mkfs.ext4 /dev/$journalDrive
sudo mkfs.ext4 /dev/$logDrive

echo "/dev/$dataDrive /data ext4 defaults,auto,noatime,noexec 0 0
/dev/$journalDrive /journal ext4 defaults,auto,noatime,noexec 0 0
/dev/$logDrive /log ext4 defaults,auto,noatime,noexec 0 0" | sudo tee -a /etc/fstab

sudo mount /data
sudo mount /journal
sudo mount /log

sudo chown mongod:mongod /data /journal /log
sudo ln -s /journal /data/journal

sudo sed -i "/dbpath\b/c\dbpath=/data" $configFile
sudo sed -i "/logpath\b/c\logpath=/log/mongod.log" $configFile


echo "Update secutiry limits..."

echo "
* soft nofile 64000
* hard nofile 64000
* soft nproc 32000
* hard nproc 32000" | sudo tee -a /etc/security/limits.conf

echo "
* soft nproc 32000
* hard nproc 32000" | sudo tee -a /etc/security/limits.d/90-nproc.conf

sudo blockdev --setra 32 /dev/$dataDrive
sudo blockdev --setra 32 /dev/$journalDrive
sudo blockdev --setra 32 /dev/$logDrive

echo 'ACTION=="add", KERNEL=="'$dataDrive'", ATTR{bdi/read_ahead_kb}="16"' | sudo tee -a /etc/udev/rules.d/85-ebs.rules
echo 'ACTION=="add", KERNEL=="'$journalDrive'", ATTR{bdi/read_ahead_kb}="16"' | sudo tee -a /etc/udev/rules.d/85-ebs.rules
echo 'ACTION=="add", KERNEL=="'$logDrive'", ATTR{bdi/read_ahead_kb}="16"' | sudo tee -a /etc/udev/rules.d/85-ebs.rules


echo "Starting mongodb..."

sudo chkconfig mongod on
sudo service mongod start

echo "Done."

read -p "Press [Enter] to reboot instance."
sudo reboot