Preparing and running an aws instance for Mongo

aws_mongo.sh

#!/bin/bash
set -e

install_mongo() {
    sudo yum -y update

    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
}

mount_volumes() {
    sudo mkdir /data /log /journal

    sudo mkfs.ext4 /dev/xvdf
    sudo mkfs.ext4 /dev/xvdg
    sudo mkfs.ext4 /dev/xvdh

    sudo echo '/dev/xvdf /data ext4 defaults,auto,noatime,noexec 0 0
/dev/xvdg /journal ext4 defaults,auto,noatime,noexec 0 0
/dev/xvdh /log ext4 defaults,auto,noatime,noexec 0 0' | 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    
}

update_limits() {
 echo "soft nofile 64000
hard nofile 64000
soft nproc 32000
hard nproc 32000" | sudo tee -a /etc/security/limits.conf

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

}

optimize_read() {
    sudo blockdev --setra 32 /dev/xvdf
    sudo blockdev --setra 32 /dev/xvdg
    sudo blockdev --setra 32 /dev/xvdh

    echo 'ACTION=="add", KERNEL=="xvdf", ATTR{bdi/read_ahead_kb}="16"
ACTION=="add", KERNEL=="xvdg", ATTR{bdi/read_ahead_kb}="16"
ACTION=="add", KERNEL=="xvdh", ATTR{bdi/read_ahead_kb}="16"' | sudo tee -a /etc/udev/rules.d/85-ebs.rules
}

set_locale() {
    echo LC_ALL="en_US.UTF-8" | sudo tee -a /etc/environment
}

install_mongo
mount_volumes
update_limits
optimize_read
set_locale

sudo service mongod start