Tag Snapshots from Volume

tagsnapshotsfromvolume.sh

#!/bin/bash

snapids=( $(aws ec2 describe-snapshots --owner-id self --filter "Name=status,Values=completed" --output text --query 'Snapshots[?!not_null(Tags[?Key == `rs:project`].Value)] | [].[SnapshotId]') )

for snapid in ${snapids[@]}; do
    echo "Getting volume for snapshot ${snapid}"
    volid=$(aws ec2 describe-snapshots --output text --snapshot-ids ${snapid} --query 'Snapshots[].VolumeId')
    echo "Getting rs:* tags for volume ${volid}"
    tags=$(aws ec2 describe-volumes --volume-ids ${volid} --query 'Volumes[].Tags[?starts_with(Key, `rs:`)][]' 2>/dev/null)
    if [ "${tags}" != "" ]; then
        aws ec2 create-tags $DRYRUN --resources ${snapid} --tags ''"${tags}"''
    else
        echo "Volume ${volid} no longer exists or does not have rs:* tags, unable to tag snapshot ${snapid}"
    fi
done