FaultAndWorkloads

Work Loads

Base Properties

---

All workload generators have a set of the following common properties:

Property	Description	Mandatory	Default Value
operation	Target endpoint that should be loaded	X	null
name	Name of the workload		"Generator"
initialArrivalTime	Time when the generator should start.		0
stop	Time when the generator should stop.		Infinite
repeating	Whether the workload should be repeated (if its not infinte).		false
repetitions	Number of repetitions of the workload.		Infinite
repetionSkip	Time to waint inbetween repeations.		0

Interval-based Workloads

---

The interval workload generator is used to generate requests with a periodic behavior.

Json Type Names

• "interval"
• "constant"
• "fixed"

Properties

Property	Description	Mandatory	Default Value
interval	Interval of the workload.		1
load	Number of requests send per interval		1
dist_strat	Distribution of the load within the interval. Possible values are "even" (constant load) and "spike" (all requests at the start of the interval).		"even"

Variable Workload

---

The variable workload generator is used to generate requests with a variable behavior based on a load model such as LIMBO.

Json Type Names

• "limbo"
• "limbo_generator"
• "dynamic"
• "variable"

Properties

Property	Description	Mandatory	Default Value
model	URI/Path of the load model.	X	null

Fault Loads

Chaos Monkey

---

Json Type Names

• "chaosmonkey"
• "chaos_monkey"
• "monkey"

Properties

Property	Description	Default
arrival_time	Time, when the injection should happen.	0 STU
instances	The number of instances to be killed.	Integer.MAX_VALUE
target	Name of the target microservice.	null

Delay Injection

---

Delays the receive operation of the affected endpoints.

Json Type Names

• "delay"
• "delay_injection"

Properties

Property	Description	Default
arrival_time	Time, when the injection should happen.	0 STU
duration	Duration for which the delay should be active.	0*
delay	Distribution of the injected delay.	null
target	Name of the target microservice.	null
operationSrc	Name of an inbound operation to be delayed.	null
operationTrg	Name of an outgoing operation to be delayed.	null

* A duration of 0 or smaller will result in an infinite delay.

Examples

---

//InExperiment Description
{
    ...
    "monkey1": { //a chaos monkey named "monkey1"
        "type": "monkey",
        "config": {
            "arrivalTime": 10,
            "target": "service1",
            "instances": 5
        }
    },
    "delays": [ //a group of injections (with a single element in this case)
        { //describe am anonymous delay injection event
            "type": "delay",
            "config": {
                "arrivalTime": 26.4387,
                "delay": "2.6+-1.1",
                "target": "service2"
            }
        }
    ]
    ...
}