AWS AMI Backup shell script

Prerequisites:
=============

Step: 1. Install Java :

# yum -y install java-1.7.0-openjdk
# export JAVA_HOME=/usr/lib/jvm/jre-1.7.0-openjdk.x86_64
# java -version

Step: 2. Download & Unzip Amazon EC2 CLI Tools :

# yum -y install wget zip unzip
# cd /tmp
# wget http://s3.amazonaws.com/ec2-downloads/ec2-api-tools.zip
# unzip ec2-api-tools.zip

Step: 3. Install the Amazon EC2 CLI Tools :

# mkdir /usr/local/ec2
# mv ec2-api-tools-1.7.5.0 /usr/local/ec2/apitools/

Step: 4. Set variables :

# export EC2_HOME=/usr/local/ec2/apitools
# export PATH=$PATH:$EC2_HOME/bin

Step: 5. Add variables to Startup Script :

# cd etc/profile.d/
# vi aws.sh

export JAVA_HOME=/usr/lib/jvm/jre-1.7.0-openjdk.x86_64
export EC2_HOME=/usr/local/ec2/apitools
export PATH=$PATH:$EC2_HOME/bin

-- Save & Quit (:wq)

# chmod +x aws.sh
# sounce aws.sh

Step: 6. Logged in into AWS Web Panel.

Step: 7. Go to IAM Panel.

-- Click on Users (tab)
-- Create New Users.
-- Give User Name.
-- Click on Create.
-- Download the Credential.
-- Close.
-- Click on Newly Created User.
-- Permission (tab)
-- Click on Attach Policy.
-- Search (AmazonEC2FullAccess) & Select it.
-- Attach Policy.

Access Key ID:  Provide your Access Key Id
Secret Access Key:  Provide your Secret Access Key

Step: 8. Finally Create AMI Auto Backup Script :

# vi /backups/scripts/aws-ami-backup.sh

#!/bin/bash
PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/ec2/apitools/bin

# Please use env | grep EC2_HOME to find out your system's setting
EC2_HOME=/usr/local/ec2/apitools

# Please use env | grep JAVA_HOME to find out your system's setting
JAVA_HOME=/usr/lib/jvm/jre-1.7.0-openjdk.x86_64
date=`date +%d-%m-%Y_%H-%M-%S`
export EC2_HOME JAVA_HOME
export AWS_ACCESS_KEY=Provide your Access Key Id
export AWS_SECRET_KEY=Provide your Secret Access Key

# Regions reference: http://docs.aws.amazon.com/general/latest/gr/rande.html
region="ap-southeast-1"

# You can find your instance ID at AWS Manage Console
instanceID="i-c706e305"

# Your prefer AMI Name prefix
amiNamePrefix="SOUMYA-SOUMYATEST-AMI_$date"

# Your prefer AMI Description

amiDescription="Daily AMI backup"

# If you want to keep 7 days AMI backups, please set routine true otherwise set it false
routine=true

if [ $routine = true ]; then
    # Setup AMI Name
    amiName=$amiNamePrefix

    # Get AMI ID
    amiIDs=$(ec2-describe-images --region $region | grep 'ami-[a-z0-9]' | grep "$amiName" |cut -f 2)

    # Get Snapshot ID
    if [[ ! -z $amiIDs ]]; then
        snapshotIDs=$(ec2-describe-snapshots --region $region | grep $amiIDs | cut -f 2)
    fi
else
    # Setup AMI Name
    amiName=$amiNamePrefix

    # Get AMI ID
    amiIDs=$(ec2-describe-images --region $region | grep 'ami-[a-z0-9]' | cut -f 2)

    # Get Snapshot ID
    if [[ ! -z $amiIDs ]]; then
        snapshotIDs=$(ec2-describe-snapshots --region $region | cut -f 2)
    fi
fi

if [[ ! -z $amiIDs ]]; then
    # Deregister AMI
    for amiID in $amiIDs
    do
        ec2-deregister --region $region $amiID
    done

    # Delete snapshot
    for snapshotID in $snapshotIDs
    do
        ec2-delete-snapshot --region $region $snapshotID
    done
fi

# Create AMI
ec2-create-image $instanceID --region $region --name "$amiName" -d "$amiDescription" --no-reboot > /tmp/AMIBackup.txt

# Name Tag
amiid=`cat /tmp/AMIBackup.txt | cut -f2`
ec2addtag $amiid --tag Name=$amiName --region $region

-- Save & Quit (:wq)

# chmod 755 /backups/scripts/aws-ami-backup.sh

Step: 9. Schedule in Crontab :

# crontab -e

0 0 * * * /backups/scripts/aws-ami-backup.sh

-- Save & Quit (:wq)

Step: 10. Retstart the Cron Service :

# service crond restart

Done...!!!




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