letstest
Simple AWS testfarm scripts for certbot client testing
- Launches EC2 instances with a given list of AMIs for different distros
- Copies certbot repo and puts it on the instances
- Runs certbot tests (bash scripts) on all of these
- Logs execution and success/fail for debugging
Notes
- Some AWS images, e.g. official CentOS and FreeBSD images require acceptance of user terms on the AWS marketplace website. This can't be automated.
- AWS EC2 has a default limit of 20 t2/t1 instances, if more are needed, they need to be requested via online webform.
Installation and configuration
This package is installed in the Certbot development environment that is created by following the instructions at https://certbot.eff.org/docs/contributing.html#running-a-local-copy-of-the-client.
After activating that virtual environment, you can then configure AWS credentials and create a key by running:
>aws configure --profile <profile name>
[interactive: enter secrets for IAM role]
>aws ec2 create-key-pair --profile <profile name> --key-name <key name> --query 'KeyMaterial' --output text > whatever/path/you/want.pem
Note: whatever you pick for <key name> will be shown to other users with AWS access.
When prompted for a default region name, enter: us-east-1.
Usage
To run tests, activate the virtual environment you created above and from this directory run:
>letstest targets/targets.yaml /path/to/your/key.pem <profile name> scripts/<test to run>
You can only run up to two tests at once. The following error is often indicative of there being too many AWS instances running on our account:
NameError: name 'instances' is not defined
If you see this, you can run the following command to shut down all running instances:
aws ec2 terminate-instances --profile <profile name> --instance-ids $(aws ec2 describe-instances --profile <profile name> | grep <key name> | cut -f8)
It will take a minute for these instances to shut down and become available again. Running this will invalidate any in progress tests.
A temporary directory whose name is output by the tests is also created with a log file from each instance of the test and a file named "results" containing the output above. The tests take quite a while to run.
Scripts
Example scripts are in the 'scripts' directory, these are just bash scripts that have a few parameters passed to them at runtime via environment variables. test_apache2.sh is a useful reference.
test_apache2 runs the dev venv and does local tests.
See:
- https://docs.aws.amazon.com/cli/latest/userguide/cli-chap-getting-started.html
- https://docs.aws.amazon.com/cli/latest/userguide/cli-ec2-keypairs.html
Main repos: