Network Chaos API

AbstractNetworkChaosModule abstract module class

All the plugins must implement the AbstractNetworkChaosModule abstract class in order to be instantiated and ran by the Netwok Chaos NG plugin. This abstract class implements two main abstract methods:

• run(self, target: str, kubecli: KrknTelemetryOpenshift, error_queue: queue.Queue = None) is the entrypoint for each Network Chaos module. If the module is configured to be run in parallel error_queue must not be None
  • target: param is the name of the resource (Pod, Node etc.) that will be targeted by the scenario
  • kubecli: the KrknTelemetryOpenshift needed by the scenario to access to the krkn-lib methods
  • error_queue: a queue that will be used by the plugin to push the errors raised during the execution of parallel modules
• get_config(self) -> (NetworkChaosScenarioType, BaseNetworkChaosConfig) returns the common subset of settings shared by all the scenarios BaseNetworkChaosConfig and the type of Network Chaos Scenario that is running (Pod Scenario or Node Scenario)

BaseNetworkChaosConfig base module configuration

Is the base class that contains the common parameters shared by all the Network Chaos NG modules.

• id is the string name of the Network Chaos NG module
• wait_duration if there is more than one network module config in the same config file, the plugin will wait wait_duration seconds before running the following one
• test_duration the duration in seconds of the scenario
• label_selector the selector used to target the resource
• instance_count if greater than 0 picks instance_count elements from the targets selected by the filters randomly
• execution if more than one target are selected by the selector the scenario can target the resources both in serial or parallel.
• namespace the namespace were the scenario workloads will be deployed
• taints : List of taints for which tolerations need to created. Example: [“node-role.kubernetes.io/master:NoSchedule”]