Deterministically creating and tagging EC2 instances

Question

I am creating 3 EC2 instances, and subsequently iterating and tagging each of them. Sometimes the tag request fails, although the instance later appears to be running.

Answer 1

Tag name cannot be created until the instance is launched . You might try giving the key_name while creating the instance. If you are using boto, it could be done by

reservation = conn.run_instances(1, 1, instance_type='m1.small', key_name='samplename')

Then instances can be retrieved by passing key_name and once they are in running state, you can also give them the tag name.