AWS Lambda + Python-ldap

Question

I am trying to use python-ldap with AWS Lambda. I downloaded the tarball from : https://pypi.python.org/pypi/python-ldap

and code to use lambda (lambda_function.py)

from ldap_dir.ldap_query.Lib import ldap

and uploaded the zip to Lambda.

where my directory structure is

ldap_dir -> ldap_query -> Lib -> ldap folder
ldap_dir -> lambda_function.py

Am I missing out something?

Bertold Kolics · Accepted Answer · 2016-05-07 13:28:38Z

4

python-ldap is built on top of native OpenLDAP libraries. This article - even though unrelated to the python ldap module - describes how to bundle Python packages that have native dependencies.

The outline of this is the following:

Create an Amazon EC2 instance with Amazon Linux
Install compiler packages as well as the OpenLDAP developer package. yum install -y gcc openldap-devel
Create a virtual environment: virtualenv env
Activate the virtual environment: env/bin/activate
Upgrade pip (I am not sure this is necessary, but I got a warning without this): pip install --upgrade pip
Install python-ldap: pip install python-ldap
Create a handler Python script, for example, lambda.py with the following code:

import os
import subprocess

libdir = os.path.join(os.getcwd(), 'local', 'lib')

def handler(event, context):
    command = 'LD_LIBRARY_PATH={} python ldap.py'.format(libdir)
    subprocess.call(command, shell=True)

Implement your LDAP function, in this example ldap.py:

import ldap

print ldap.PORT

Create a zip package, let's say ldap.zip:

zip -9 ~/ldap.zip ldap.py
zip -9 ~/ldap.zip lambda.py
cd env/lib/python2.7/site-packages
zip -r9 ~/ldap.zip *
cd ../../../lib64/python2.7/site-packages
zip -r9 ~/ldap.zip *

Download the zip to your system (or put it into an S3 bucket). Now you can create your Lambda function using lambda.handler as the function name and use the zip file as the code.

I hope this helps.

answered May 7, 2016 at 13:28

Bertold Kolics

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1 Comment

user3089927 Over a year ago

I followed everything step by step and strangely I am getting : Unable to import module 'lambda': No module named lambda. Am I missing something?

GeoCom · Accepted Answer · 2022-09-12 16:38:28Z

0

one more step/check to the solution above: still you might get No module named '_ldap', then check if the python version that you install on local/EC2 are the same as the Runtime on lambda

answered Sep 12, 2022 at 16:38

GeoCom

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