How to get the region of the current user from boto?
Took some ideas from here and other posts, and I believe this should work for pretty much any setup, whether local or on any AWS service including Lambda, EC2, ECS, Glue, etc:
def detect_running_region():
"""Dynamically determine the region from a running Glue job (or anything on EC2 for
that matter)."""
easy_checks = [
# check if set through ENV vars
os.environ.get('AWS_REGION'),
os.environ.get('AWS_DEFAULT_REGION'),
# else check if set in config or in boto already
boto3.DEFAULT_SESSION.region_name if boto3.DEFAULT_SESSION else None,
boto3.Session().region_name,
]
for region in easy_checks:
if region:
return region
# else query an external service
# https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instance-identity-documents.html
r = requests.get("http://169.254.169.254/latest/dynamic/instance-identity/document")
response_json = r.json()
return response_json.get('region')
You should be able to read the region_name
from the session.Session
object like
my_session = boto3.session.Session()
my_region = my_session.region_name
region_name
is basically defined as session.get_config_variable('region')
Another option, if you are working with a boto3 client, is:
import boto3
client = boto3.client('s3') # example client, could be any
client.meta.region_name