AWS tags on tagged instances

Probably a better way to handle this, but occasionally I want to run a script against a resources that have a tag NEWKEY=NEWVALUE and I want to update a different set of instances to have that tag.

Get the instance id:

aws --profile MYPROFILE ec2 describe-instances --filters Name="tag:OLD_KEY",Values="PARTIAL_VALUE*" --query 'Reservations[*].Instances[*].InstanceId[]' --output=text


and an update tag example:

aws --profile MYPROFILE ec2 create-tags --resources i-000resource1 i-000resource2 --tags Key=NEWKEY,Value=NEWVALUE


and putting it all together for the lazy:

aws --profile MYPROFILE ec2 create-tags --resources $(aws --profile MYPROFILE ec2 describe-instances --filters Name="tag:KEY1",Values="PARTIAL_VALUE*" --query 'Reservations[*].Instances[*].InstanceId[]' --output=text) --tags Key=NEWKEY,Value=NEWVALUE


of course don’t forget your appropriate region tag if applicable