如何从实例内的 Python 获取 EC2 实例标签？

Question

I need to get the value for a particular tag in Python within an EC2 instance.

Restriction: Can't use the Python EC2 metadata module as “Tags allowed in metadata” won't be enabled.

So I cannot do “ec2_metadata.tags[“Name”]” as that would throw an 404 error.

What other way can we do this? The curl method wouldn't work either since that also requires the metadata tags to be enabled.

Answer 1

Get the instance ID from http://169.254.169.254/latest/meta-data/instance-id , then use the describe_instances API with the instance id.

Answer 2

My solution:

region = ec2_metadata.region
instance_id = ec2_metadata.instance_id
ec2_resource = boto3.resource(‘ec2’,region_name=region)
ec2_instance = ec2_resource.Instance(instance_id)
tags = ec2_instance.tags

Then I get the value for a particular tag by:

for tag in tags:
    if tag[“Key”] == “Name”:
        print(tag[“Value”])

I'm sure there are other solutions but since I had to implement any solution for now, this is it.