chaos-lambdas

A suite of lambdas for testing AWS architecture resiliency

These functions may destroy AWS resources. Always run with care.

For an introduction, check out the blog post.

For questions or bugs, open an issue.

These Lambdas can be automated by setting up a Cloudwatch event to trigger the Lambda on a recurring basis. For example, to execute every 15 minutes during business hours: */15 14-20 ? * MON-FRI *

ec2-az-outage

Simulates an availability zone outage by terminating all EC2 instances in an availability zone

Parameters:

region - Target region

probability - Probability to run function

zones - List of AZ zones within region

exclusions - List of instance ids that should not be terminated

snsTopic - SNS topic for notifications

Permissions:

Use AmazonEC2FullAccess policy

ec2-instance-failure

Terminates an EC2 instance at random chosen from a list of instances belonging to a configured set of auto scaling groups

Parameters:

region - Target region

probability - Probability to run function

groups - List of auto scaling groups

snsTopic - SNS topic for notifications

Permissions:

Use AmazonEC2FullAccess policy

ecs-task-failure

Stops an ECS task at random chosen from a list of tasks belonging to a configured set of ECS services

Parameters:

region - Target region

probability - Probability to run function

services - List of ECS services

snsTopic - SNS topic for notifications

Permissions:

Use AmazonECS_FullAccess policy

rds-az-failure

Triggers an RDS AZ failover by rebooting the RDS instance with a forced failover

Parameters:

region - Target region

probability - Probability to run function

instance - List of RDS instance identifiers

snsTopic - SNS topic for notifications

Permissions:

Use AmazonRDSFullAccess policy