Create EC2 Snapshots

create-ec2-snapshot.sh

#!/bin/bash
source /home/newsapps/secrets/all_secrets.sh;
export AWS_ACCESS_KEY_ID=$SNAPSHOTS_AWS_ACCESS_KEY_ID;
export AWS_SECRET_ACCESS_KEY=$SNAPSHOTS_AWS_SECRET_ACCESS_KEY;
export PATH=$PATH:/usr/local/bin;
export NUMBER_OF_SNAPSHOTS_TO_KEEP=3;
export DATE_STR=`date +%y.%m.%d.%I`;
export INSTANCE_ID=`ec2metadata --instance-id`;
# Get the ID of the volume mounted as the root device on this instance
export VOLUME_ID=`/usr/local/bin/aws ec2 describe-volumes --filters Name=attachment.instance-id,Values=$INSTANCE_ID Name=attachment.device,Values=/dev/sda1 --query 'Volumes[*].{ID:VolumeId}' | grep ID | awk '{print $2}' | tr -d '"'`

date;
echo "Initiating EBS volume snapshot of volume $VOLUME_ID attached to instance ID $INSTANCE_ID...";
    /usr/local/bin/aws ec2 create-snapshot --volume-id $VOLUME_ID --description $VOLUME_ID;
echo "Done.";

echo "Deleting old snapshots...";
# Get any snapshots older than the last $NUMBER_OF_SNAPSHOTS_TO_KEEP
# TODO: this should pull the snapshot start date and use that to determine which snapshots should be deleted.
for SNAPSHOT_ID in `/usr/local/bin/aws ec2 describe-snapshots --filters Name=volume-id,Values=$VOLUME_ID --query 'Snapshots[*].{ID:SnapshotId}' | grep ID | head -n -$NUMBER_OF_SNAPSHOTS_TO_KEEP | awk '{print $2}' | tr -d '"'` ; do
    echo "Deleting snapshot $SNAPSHOT_ID...";
    /usr/local/bin/aws ec2 delete-snapshot --snapshot-id $SNAPSHOT_ID;
done;
echo "Done.";