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© 2021, Amazon Web Services, Inc. or its Affiliates. Gunnar Grosch @gunnargrosch Improve resiliency and performance with controlled chaos engineering

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© 2021, Amazon Web Services, Inc. or its Affiliates. Agenda • Challenges with distributed systems • Why is chaos engineering hard? • Introducing AWS Fault Injection Simulator (FIS) • Key features and use cases • Automated chaos experiments • Multiple demos along the way

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© 2021, Amazon Web Services, Inc. or its Affiliates. Challenges with distributed systems

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© 2021, Amazon Web Services, Inc. or its Affiliates. Distributed systems are complex Message Message Reply Reply Server Network Client https://aws.amazon.com/builders-library/challenges-with-distributed-systems/

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© 2021, Amazon Web Services, Inc. or its Affiliates. Traditional testing is not enough TESTING = VERIFYING A KNOWN CONDITION Unit testing of components Tested in isolation to ensure function meets expectations Functional testing of integrations Each execution path tested to assure expected results

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© 2021, Amazon Web Services, Inc. or its Affiliates. And it can get more complicated… IOError: No space left on device close failed in file object destructor: IOError: No space left on device close failed in file object destructor: IOError: No space left on device close failed in file object destructor: IOError: No space left on device close failed in file object destructor: IOError: No space left on device close failed in file object destructor: IOError: No space left on device close failed in file object destructor: IOError: No space left on device close failed in file object destructor: IOError: No space left on device close failed in file object destructor: IOError: No space left on device logfile ROTATE logfile.0 ROTATE logfile.1 ROTATE logfile.2 ROTATE logfile.3 ROTATE logfile.n ROTATE

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© 2021, Amazon Web Services, Inc. or its Affiliates. S O I T R E S S B S E R V E M P R O V E Chaos engineering Improve resilience and performance Uncover hidden issues Expose blind spots Monitoring, observability, and alarm And more

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© 2021, Amazon Web Services, Inc. or its Affiliates. Phases of chaos engineering Steady state Hypothesis Run experiment Verify Improve

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© 2021, Amazon Web Services, Inc. or its Affiliates. Why is chaos engineering difficult? Difficult to ensure safety Stitch together different tools and homemade scripts 1 Agents or libraries required to get started 3 2 Difficult to reproduce “real-world” events (multiple failures at once) 4

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© 2021, Amazon Web Services, Inc. or its Affiliates. AWS Fault Injection Simulator Safeguards Real-world conditions Easy to get started Fully managed chaos engineering service

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© 2021, Amazon Web Services, Inc. or its Affiliates. No need to integrate multiple tools and homemade scripts or install agents Use the AWS Management Console or the AWS CLI Use pre-existing experiment templates and get started in minutes Easily share it with others Easy to get started

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© 2021, Amazon Web Services, Inc. or its Affiliates. Real-world conditions Run experiments in sequence of events or in parallel Target all levels of the system (host, infrastructure, network, etc.) Real faults injected at the service control plane level!

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© 2021, Amazon Web Services, Inc. or its Affiliates. Safeguards “Stop conditions” alarms Integration with Amazon CloudWatch Built-in rollbacks Fine-grain IAM controls

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© 2021, Amazon Web Services, Inc. or its Affiliates. Components Experiment templates Experiments Actions Targets

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© 2021, Amazon Web Services, Inc. or its Affiliates. Actions are the fault injection actions executed during an experiment aws:: Actions include: • Fault type • Targeted resources • Timing relative to any other actions • Fault-specific parameters, such as duration, rollback behavior, or the portion of requests to throttle Actions

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© 2021, Amazon Web Services, Inc. or its Affiliates. Targets define one or more AWS resources on which to carry out an action Targets include: • Resource type • Resource IDs, tags, and filters • Selection mode (e.g., ALL, RANDOM) Targets

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© 2021, Amazon Web Services, Inc. or its Affiliates. Experiment templates define an experiment and are used in the start-experiment request Experiment templates include: • Actions • Targets • Stop condition alarms • IAM role • Description • Tags Experiment templates

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© 2021, Amazon Web Services, Inc. or its Affiliates. Experiments are snapshot of the experiment template when it was first launched with couple additions Experiments include: • Snapshot of the experiment • Creation and start time • Status • Execution ID • Experiment template ID • IAM role ARN Experiments

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© 2021, Amazon Web Services, Inc. or its Affiliates. Use cases

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© 2021, Amazon Web Services, Inc. or its Affiliates. Use cases One-off experiments Periodic game days Automated experiments

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© 2021, Amazon Web Services, Inc. or its Affiliates. Use cases One-off experiments Periodic game days Automated experiments

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© 2021, Amazon Web Services, Inc. or its Affiliates. Use cases One-off experiments Periodic game days Automated experiments

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© 2021, Amazon Web Services, Inc. or its Affiliates. Use cases One-off experiments Periodic game days Automated experiments

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© 2021, Amazon Web Services, Inc. or its Affiliates. Automated experiments Recurring scheduled experiments Event-triggered experiments Continuous delivery experiments

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© 2021, Amazon Web Services, Inc. or its Affiliates. Automated experiments Recurring scheduled experiments Event-triggered experiments Continuous delivery experiments

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© 2021, Amazon Web Services, Inc. or its Affiliates. Automated experiments Recurring scheduled experiments Event-triggered experiments Continuous delivery experiments

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© 2021, Amazon Web Services, Inc. or its Affiliates. Automated experiments Recurring scheduled experiments Event-triggered experiments Continuous delivery experiments

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© 2021, Amazon Web Services, Inc. or its Affiliates. Automated experiments Recurring scheduled experiments Event-triggered experiments Continuous delivery experiments

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© 2021, Amazon Web Services, Inc. or its Affiliates. Resources AWS Well-Architected Framework https://aws.amazon.com/architecture/well-architected/ AWS Fault Injection Simulator https://aws.amazon.com/fis/ AWS FIS Documentation https://docs.aws.amazon.com/fis/ AWS FIS Samples https://github.com/aws-samples/aws-fault-injection-simulator-samples

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© 2021, Amazon Web Services, Inc. or its Affiliates. Thank you! Gunnar Grosch @gunnargrosch