12/18/2023 0 Comments Space gremlin high sierraAs custom tags are used to indicate where an attack should run, the same tags can be used to indicate the hosts to which network traffic should be impacted. This is important for today's ephemeral environments where hosts live for a short time and have dynamic IP addresses. You can use tags to target IP addresses where traffic should be impacted during network attacks. Warning: Important considerations for targeting Kubernetes Pods with Network Attacks Network host tags Induces packet loss into all matching egress network traffic. Injects latency into all matching egress network traffic. Limit the impact to only the traffic you want to test by specifying ports, hostnames, and IP addresses. Test how your service behaves when you are unable to reach one of your dependencies, internal or external. Network Gremlins show you the impact of lost or delayed traffic to your application. Note: Process attacks do not work for Process ID 1, consider a Shutdown attack instead. Kills the specified process, which can be used to simulate application or dependency crashes. Performs a shutdown (and an optional reboot) on the host operating system to test how your system behaves when losing one or more cluster machines.Ĭhanges the host's system time, which can be used to simulate adjusting to daylight saving time and other time-related events. State Gremlins introduce chaos into your infrastructure so that you can observe how well your service handles it, or if it fails. Writes files to disk to fill it to a specific percentage. Puts read/write pressure on I/O devices such as hard disks. Generates high load for one or more CPU cores. They reveal how your service degrades when starved of CPU, memory, IO, or disk space. Resource Gremlins are a great starting point - simple to run and understand. ![]() State attacks: test against unexpected changes in your environment such as power outages, node failures, clock drift, or application crashesĮach attack, or "Gremlin", tests your resilience in a different way.Network attacks: test against unreliable network conditions.Resource attacks: test against sudden changes in consumption of computing resources.Gremlin provides three categories of attacks: In addition to running onetime attacks, you can also schedule regular or recurring attacks, create attack templates, and view attack reports. This includes impacting system resources, delaying or dropping network traffic, shutting down hosts, and more. Gremlin provides a range of attacks which you can run against your infrastructure. An attack is a method of injecting failure into a system in a simple, safe, and secure way.
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