Pass environment variables to lambda function deployed with AWS CDK

There are cases that we need to deal with passing information inside lambda function using environment variables.

Here I am giving an example with CDK python which passes environment variable to a lambda and use those environment variables value inside the lambda.

base_lambda = lb.Function(self, 'base_lambda',
 code = lb.Code.from_asset('lambda'),
 handler = 'base_lambda.handler',
 runtime = lb.Runtime.PYTHON_3_6,
 function_name = 'base_lambda',
 timeout = core.Duration.seconds(60),
 environment = {
          'cluster_env': 'staging',
          'release': '1.2.1'
        }
 )

Then you can access this ‘cluster_env’ and ‘release’ environment variable inside the lambda function as follows,

import os
def handler(message, context):
    cluster = os.environ['cluster_env']
    release = os.environ['release']
   
    print("cluster name is ": cluster)