AWS Cookbook

awscli-cookbook

# Get a (filtered) list of AWS instances, comma separated:
#
# Here's the reference to the 'describe-instances' command in aws-cli,
# check out the filters section.
# http://docs.aws.amazon.com/cli/latest/reference/ec2/describe-instances.html

$ aws ec2 describe-instances --filters "Name=availability-zone,Values=us*" | \
jq -r '.Reservations[] | .Instances[] | "\(.InstanceId)"' | \
tr '\n' ','

# Example: Create tags on these instances:

$ aws ec2 create-tags --resources `aws ec2 describe-instances --filters "Name=availability-zone,Values=us*" | jq -r '.Reservations[] | .Instances[] | "\(.InstanceId)"' | tr '\n' ' '` --tags "Key=Env,Value=Production"