AWS EC2 AMI Back up Script

Goal:
If you looking for an ready made working script to complete back your ec2 servers then these article is there to help you out with working shell script code.

Steps:
Install aws cli. (I am adding commands for Linux/macOS system, for other env please follow through link share in each steps)

$ python -m pip install awscli 

Detailed steps for various env can be found here.

To check version after installation run 

$ aws --version

Setup Credentials on your machine using below command and try to follow steps.

$ aws configure

More details can be found here. 

Once Everything has been setup. you can copy code from below gist. It takes few input. 

1. Elastic ip of server
2. How long you want to keep your old ami
3. Server name, that's nothing but what initial name you want to keep for your backup ami.
   

	#!/bin/bash
	publicdns=""
	day=2 #these will keep last two days ami
	serverName="" #some readable name for your ami
	#https://docs.aws.amazon.com/cli/latest/userguide/cli-chap-getting-started.html#cli-multiple-profiles
	profileVar="" #some specific user profile and creds with limited permission
	#Script will create an ami for given public dns
	echo -e "\n----------------------------------\n `date` \n----------------------------------"
	echo -e "Image Backup Script Started...\n"
	echo -e "Deleting tmp files created by these script"
	rm /tmp/ami*
	echo -e "All tmp file created by these script deleted\n"
	#Error Handling Function
	error_exit ()
	{
	if [ "$?" != "0" ];
	then
	echo -e $1"\n"
	exit 1
	else
	echo -e $2"\n"
	fi
	}
	echo -e "dns-name = $publicdns\n"
	#Get Instance Id from aws public
	echo -e "Getting Instance Id from $publicdns\n"
	instanceid=$(aws ec2 describe-instances --filters "Name=dns-name,Values=$publicdns" --output table --profile $profileVar| grep -i InstanceId | awk '{ print $4 }')
	publicipaddr=$(aws ec2 describe-instances --filters "Name=dns-name,Values=$publicdns" --output table --profile $profileVar| grep -i publicipaddr | awk '{ print $4 }')
	if [ ! -z "$instanceid" ];
	then
	echo -e "Instance Id = $instanceid\n"
	echo -e "Public IP = $publicipaddr\n"
	#To create a unique AMI name from this script
	initialName=$serverName-$publicipaddr
	aminame=$(echo "$initialName-`date +%s`")
	echo -e "Starting the Daily AMI creation: $aminame\n"
	#To create AMI of defined instance
	aws ec2 create-image --instance-id "$instanceid" --output table --profile $profileVar --name "$aminame" --description "This is for Daily auto AMI creation" --no-reboot | grep ami| awk '{print $4}'
	error_exit "failed while create image" "image created"
	#check for last created available to use
	date24hourago=$(date --date="24 hours ago" +%Y-%m-%d)
	echo -e "Cheking for AMI in available state After $date24hourago\n "
	aws ec2 describe-images --filters "Name=state,Values=available,Name=name,Values=$initialName*" --output table --profile $profileVar --query "Images[?CreationDate>\`$date24hourago\`]" | grep -i imageid | awk '{ print $4 }' > /tmp/amitodayavailabe.txt
	if [[ -s /tmp/amitodayavailabe.txt ]];
	then
	echo -e "AMI available After $date24hourago\n"
	dayago=$(date --date="$day days ago" +%Y-%m-%d)
	echo -e "Looking for AMI older than $dayago\n "
	#Finding older ami which needed to be removed
	aws ec2 describe-images --filters "Name=name,Values=$initialName*" --output table --profile $profileVar --query "Images[?CreationDate<\`$dayago\`]" | grep -i imageid | awk '{ print $4 }' > /tmp/amiimageid.txt
	if [[ -s /tmp/amiimageid.txt ]];
	then
	echo -e "Following AMI is found : `cat /tmp/amiimageid.txt`\n"
	#Find the snapshots attached to the Image need to be Deregister
	aws ec2 describe-images --image-ids `cat /tmp/amiimageid.txt` --output table --profile $profileVar | grep -i snap | awk ' { print $4 }' > /tmp/amisnap.txt
	echo -e "Following are the snapshots associated with it : `cat /tmp/amisnap.txt`:\n "
	echo -e "Starting the Deregister of AMI... \n"
	#Deregistering the AMI
	echo "deregisting images name `cat /tmp/amiimageid.txt`"
	for x in `cat /tmp/amiimageid.txt`;
	do
	echo "deregisting image image-id = $x"
	aws ec2 deregister-image --profile $profileVar --image-id $x;
	done
	echo -e "\nDeleting the associated snapshots.... \n"
	#Deleting snapshots attached to AMI
	for i in `cat /tmp/amisnap.txt`;
	do
	echo "deleting snapshot snapshot-id = $i"
	aws ec2 delete-snapshot --profile $profileVar --snapshot-id $i ;
	done
	else
	echo -e "No AMI found before $dayago"
	fi
	else
	echo -e "AMI after $date24hourago not in available state So skipped deleting older AMI\n"
	fi
	else
	echo -e "No instances available for $publicdns\n"
	fi
	echo -e "Image Back up Script Finished.\n"
	echo -e "\n----------------------------------\n `date` \n----------------------------------"

view raw awsamibackup.sh hosted with ❤ by GitHub

Hope this article helped you, Lemme know if you find any difficulty using it will try to help it out ASAP.