Drop Outgoing Traffic

Attack

Cause packet loss for outgoing network traffic (egress).

Targets:

Hosts

Install now

Drop Outgoing Traffic

Cause packet loss for outgoing network traffic (egress).

Attack

Targets:

Hosts

Install now

Drop Outgoing Traffic

Attack

Cause packet loss for outgoing network traffic (egress).

Targets:

Hosts

Install now

Drop Outgoing Traffic

Cause packet loss for outgoing network traffic (egress).

Attack

Targets:

Hosts

Install now

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Introduction

Cause packet loss for matching outgoing network traffic.

Prerequisites

If you are not using our container images for the extension, you need install the tc (from the iproute2 package) tool to use the attack.

Use Cases

Understand how your services behave under specific / flaky network conditions

Parameters

Parameter	Description	Default
Duration	How long should the traffic be lost?	30s
Hostname	Restrict to which hosts the traffic is lost
IP Address	Restrict to which IP address the traffic is lost
Network Loss	How much percentage of traffic should be lost?	70
Network Interface	Target Network Interface which should be attacked. All if none specified.
Port Number	Restrict to which port number the traffic is delayed

Statistics

-Stars

Network loss for Kubernetes node's outgoing traffic 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 suffers from a network loss.

Motivation

Cloud provider 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 zone 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 drop outgoing traffic to simulate network loss in an availability. If you want to test for a full outage of the zone, configure it to 100% loss. While the network loss happens, we observe changes of a Kubernetes cluster with Steadybit's built-in visibility. Once the network loss 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

AWS

Azure

GCP

Redundancy

Kubernetes

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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Block Traffic

Drops network traffic (incoming and outgoing)

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Delay Traffic

Inject latency into network traffic.

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Fill Disk

Writes data to the disk.

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Fill Memory

Allocates and holds memory.

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Limit Bandwidth

Reduce the available network bandwidth.

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