Block Traffic

Attack

Drops network traffic (incoming and outgoing)

Targets:

Hosts

Install now

Block Traffic

Drops network traffic (incoming and outgoing)

Attack

Targets:

Hosts

Install now

Block Traffic

Attack

Drops network traffic (incoming and outgoing)

Targets:

Hosts

Install now

Block Traffic

Drops network traffic (incoming and outgoing)

Attack

Targets:

Hosts

Install now

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Host Blackhole Attack

Introduction

Drops all network traffic (IN/OUT/FORWARDED).

Prerequisites

If you are not using our container images for the extension, the attack requires tc (from the iproute2 package).

Restrictions

This attack is not supported on hosts using Cilium.

Use Cases

Understand how your services behave under network outages

Parameters

Parameter	Description	Default
Duration	How long should traffic been blocked?	30s

Statistics

-Stars

Network outage for Kubernetes nodes in an availability zone

Achieve high availability of your Kubernetes cluster via redundancy across different Availability Zones. Check what happens to your Kubernetes cluster when one of the zones is down.

Motivation

Cloud providers host your deployments and services across multiple locations worldwide. From a reliability standpoint, regions and availability zones are most interesting. While the former refers to separate geographic areas spread worldwide, the latter refers to an isolated location within a region. For most use cases, applying deployments across availability zones is sufficient. Given that failures may happen at this level quite frequently, you should verify that your applications are still working in case of an outage.

Structure

We leverage the block traffic attack to simulate a full network loss in an availability zone. While the zone outage happens, we observe changes in the Kubernetes cluster with Steadybit's built-in visibility. Once the zone outage is over, we expect that all deployments will recover again within a specified time.

Solution Sketch

AWS Regions and Zones
Azure Regions and Zones
GCP Regions and Zones
Kubernetes liveness, readiness, and startup probes

Azure

GCP

Redundancy

AWS

Availability Zone

Hosts

Kubernetes cluster

Kubernetes deployments

More Host Actions

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Block DNS

Blocks access to DNS servers

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Hosts

Delay Traffic

Inject latency into network traffic.

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Hosts

Drop Outgoing Traffic

Cause packet loss for outgoing network traffic (egress).

Attack

Hosts

Fill Disk

Writes data to the disk.

Attack

Hosts

Fill Memory

Allocates and holds memory.

Attack

Hosts

Limit Bandwidth

Reduce the available network bandwidth.

Attack

Hosts

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