How to get access to Lamba logs

[RajasGujarathi]

moto version - 5.0.13

I am invoking a Lambda (mocked), how to get access to Lambda logs?

[bblommers]

Logs are stored in CloudWatch, just like they are in AWS. In our tests we use the following code to get the results from an asyncronous invocation:

logs_conn = boto3.client("logs", region_name="us-east-1")

start = time.time()
while (time.time() - start) < 30:
    result = logs_conn.describe_log_streams(logGroupName=f"/aws/lambda/{fn_name}")
    log_streams = result.get("logStreams")
    if not log_streams:
        time.sleep(0.5)
        continue
    assert len(log_streams) >= 1

    result = logs_conn.get_log_events(
        logGroupName=f"/aws/lambda/{fn_name}",
        logStreamName=log_streams[0]["logStreamName"],
    )
    print(result)
    for event in result.get("events"):
        if "RESULT THAT YOU WANT" in event["message"]:
            return
    time.sleep(0.5)