Requirements:
- Access to a Linux machine where shell script will be created
- Access keys to an Amazon Web Services (AWS) Account where the EC2 Instance is hosted
Script name: ami-bash.sh
Input: Name of the instance
How to run: ami-backup.sh <instance_name>
What it does:
1. Asks for INSTANCE_NAME
2. Sets the LOG directory and LOGFILE to record execution
3. Runs the AWS CLI describe-instances to extract the INSTANCE_ID
4. Sets the name of the AMI IMAGE_NAME
5. Runs the AWS CLI create-image to create the AMI
6. Runs a loop to check if the image has been created and available
Finished result: An AMI backup of the instance
Script:
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# name: ami-backup.sh # usage: ami-backup.sh <instance_name> # ami-backup.sh my-db-instance INSTANCE_NAME=$1 LOGDIR=/tmp/log LOGFILE=${LOGDIR}/ami-backup-$INSTANCE_NAME-$(date +"%Y-%m-%d-%H-%M-%S").log INSTANCE_ID=`aws ec2 -describe-instances --filters \ "Name=tag:Name,Values=$INSTANCE_NAME" \ | grep "InstanceId" \ | grep -Po ': "\K[^"]*'`IMAGE_NAME=ami-backup-$INSTANCE_NAME-$(date +"%Y-%m-%d-%H-%M") echo "$(date +"%Y-%m-%d-%H:%M:%S") ami-backup.sh started." >> $LOGFILE echo "$IMAGE_NAME AMI will be created." >> $LOGFILE IMAGE_ID=`aws ec2 create-image --instance-id $INSTANCE_ID \ --name "$IMAGE_NAME" \ --description "$INSTANCE_NAME AMI - $(date +"%Y-%m-%d-%H-%M")" \ | grep -Po ': "\K[^"]*'` while [ true ] do echo "AMI creation in progress..." >> $LOGFILE IMAGE_CREATION_STATUS=`aws ec2 describe-images --filters \ "Name=name,Values=$IMAGE_NAME" | grep "State" | grep -Po ': "\K[^"]*'` echo "AMI $IMAGE_NAME created." >> $LOGFILE break fi sleep 300 done echo "$(date +"%Y-%m-%d-%H:%M:%S") ami-backup.sh completed." >> $LOGFILE
==================================================================================================================================================================Amazon Photo by Igor Shalyminov on Unsplash
