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Testing and Development

Test Summary

Daily OpenLambda tests will be uploaded here:

https://s3.us-east-2.amazonaws.com/open-lambda-public/tests.html

Development VM

In order to facilitate testing and the creation of dev VMs, we maintain an AWS VM image for quickly provisioning a VM with all the build prereqs installed. The AMI for the current image will be here. The image can be used to create a t2.micro instance in the US-EAST-2 region.

Creating a new AMI

The image is created with Vagrant and requires some extra plugins:

vagrant plugin install vagrant-aws
vagrant plugin install vagrant-aws-credentials
vagrant plugin install vagrant-ami
vagrant plugin install vagrant-reload
vagrant box add aws-dummy https://github.com/mitchellh/vagrant-aws/raw/master/dummy.box

You can then build the image as follows:

cd dev-build
python3 build-ami.py

Note that this script requires AWS permissions as well github push permissions for this repo. The build takes about 10 minutes, and will automatically update ami.txt and push it.

Spinning Up a Dev VM

You'll need the same vagrant plugins mentioned in the above section. Then do the following:

cd dev-deploy
vagrant up
vagrant ssh

Then pull, build, and test:

sudo su
git clone https://github.com/open-lambda/open-lambda.git
cd open-lambda
make
make test-all

Lambda Config

The code for the lambda that launches the EC2 test VM is located at lambdas/launch-ec2.py. The new VM will run the code in tests/ec2-test.py.

Upload launch-ec2.py as a new lambda function, with whatever triggers are appropriate. The entry function is main.

You'll need to do some permission config for the lambda:

  • give the lambda has permission to launch EC2 instances
  • give the lambda has permission to pass a role to new EC2 instances so they can write to S3

The lambda uses the requests module, which is not deployed with Python. You'll need to create a lambda layer with this installed. You can do so with the following steps:

python3 -m venv lambda-base
source ./lambda-base/bin/activate
zip -r lambda-base.zip lambda-base
pip install requests
aws lambda publish-layer-version --layer-name lambda-base --zip-file fileb://lambda-base.zip

Configure the function to use this layer, and add PYTHONPATH=/opt/lib/python3.6/site-packages to the environment variables for the function.