Lokust is a Locust.io Kubernetes Operator. It helps integrate Locust distributed mode into Kubernetes, so you easely scale up and down your load tests without the hassle of provisioning infrastructure.

Install lokustctl

It will be used to interface with the lokust controller, helping to manage your tests without having to deal with kubernetes yaml files, so anyone regardless of knowing kubernetes can create and run tests.

OS=$(uname -s | tr '[:upper:]' '[:lower:]')
ARCH=$(uname -m)
VERSION="0.1.0-beta.1"

curl -L -s -o ./lokustctl "https://github.com/luizbafilho/lokust/releases/download/v${VERSION}/lokustctl_${VERSION}_${OS}_${ARCH}"

chmod +x ./lokustctl
mv lokustctl /usr/local/bin
lokustctl -h

Deploy Lokust Controller

You can you lokustctl to deploy the Lokust controller into Kubernetes. The following command will apply all kubernetes manifests necessary deploy the controller.

It will deploy them by default into lokust-system namespace, you can specify a different one using --namespace

$ lokustctl install | kubectl apply -f -

Create a new load test

We first need a locustfile.py that defines your test behavior. More info at locust.io on how to write it.

cat <<EOT >> locustfile.py
from locust import HttpUser, between, task

class WebsiteUser(HttpUser):
    host = "https://google.com"
    wait_time = between(5, 15)

    @task
    def index(self):
        self.client.get("/")
EOT

lokustctl create --name app-test --replicas 2 -f locustfile.py

Lists all current tests

lokustctl list

Access the test's dashboard

To actually start the test you need to access the test's dashboard. To access it in a kubernetes environment we need to create a local proxy that redirects you the the test created there. To do that execute:

lokustctl connect app-test

Delete the test

Due the locust tests nature, it will run indefinetly on kubernetes consuming resources until you delete it.

lokustctl delete app-test