Update

Author: mrichman

Lambda/Working-with-Lambda-Layers/.gitignore

@@ -0,0 +1,4 @@
+Pipfile
+Pipfile.lock
+requirements.txt
+*.zip

Lambda/Working-with-Lambda-Layers/README.md

@@ -0,0 +1,50 @@
+# Working with Lambda Layers
+
+Create a new virtual environment using `pipenv` and install the required libraries:
+
+```sh
+pipenv --python 3.7
+pipenv shell
+pipenv install requests
+```
+
+Note: If you are on macOS, you can install `pipenv` using Homebrew:
+
+```sh
+brew install pipenv
+```
+
+on Amazon Linux, or another environment, you can install using `pip`:
+
+```sh
+pip3 install pipenv --user
+```
+
+Create the ZIP deployment package:
+
+```sh
+PY_DIR='build/python/lib/python3.7/site-packages'
+# Create temporary build directory
+mkdir -p $PY_DIR
+# Generate requirements file
+pipenv lock -r > requirements.txt
+# Install packages into the target directory
+pip install -r requirements.txt --no-deps -t $PY_DIR
+cd build
+# Zip files
+zip -r ../requests_layer.zip .
+cd ..
+# Remove temporary directory
+rm -r build
+```
+
+Create the Lambda Layer
+
+```sh
+aws lambda publish-layer-version \
+--layer-name requests \
+--compatible-runtimes python3.7 \
+--zip-file fileb://requests_layer.zip
+```
+
+Note the `LayerArn` in the output.

Lambda/Working-with-Lambda-Layers/list_packages.py

@@ -0,0 +1,23 @@
+import pkg_resources
+
+
+def lambda_handler(event, context):
+    pkgs = pkg_resources.working_set
+    pkgs_list = sorted([f'{i.key}=={i.version}' for i in pkgs])
+    print("\n".join(pkgs_list))
+
+# Log output will resemble:
+
+# START RequestId: 430a0232-8c13-4788-90e0-c24e7ac3d7c4 Version: $LATEST
+# boto3==1.9.42
+# botocore==1.12.42
+# docutils==0.14
+# jmespath==0.9.3
+# pip==18.1
+# python-dateutil==2.7.5
+# s3transfer==0.1.13
+# setuptools==40.6.2
+# six==1.11.0
+# urllib3==1.24.1
+# END RequestId: 430a0232-8c13-4788-90e0-c24e7ac3d7c4
+# REPORT RequestId: 430a0232-8c13-4788-90e0-c24e7ac3d7c4	Duration: 39.76 ms	Billed Duration: 100 ms 	Memory Size: 128 MB	Max Memory Used: 70 MB

Lambda/Working-with-Lambda-Layers/test_requests.py

@@ -0,0 +1,10 @@
+import requests
+
+
+def lambda_handler(event, context):
+
+    response = requests.get('https://linuxacademy.com')
+    if response:
+        print('Success!')
+    else:
+        print('An error has occurred.')