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Testing

Load testing Headlamp​

Can Headlamp work well with busy clusters?

Limits we want to test for to begin with:

  • 10,000 pods
  • 1,000 nodes
  • 10,000 events
  • 15 clusters (300 clusters max)

Steps:

  • Create load in a cluster
  • Run Headlamp and see if it works well compared to low load
    • performance profiles
    • CPU/memory usage
    • feel

Kwok for low resource usage load testing of Headlamp​

KWOK is a toolkit that enables setting up a cluster of thousands of Nodes in seconds. All Nodes are simulated to behave like real ones, which creates a pretty low resource footprint that you can easily play around with on your machine.

Creating lots of Kubernetes activity​

Maybe you need to delete a cluster and create a fresh one.

kwokctl delete cluster
kwokctl create cluster

Make sure your kubectl context is set to 'kwok-kwok'.

kubectl config get-contexts

Generating Initial Data​

This will create 900 nodes, 9000 pods, and 1000 events as fast as possible. Then it will create 1 event per second up to a total of 9000 events. Also one per second: 100 new nodes and 1000 new pods. Finally, it will create 15 clusters.

cd load-tests
npm install

echo "Creating initial activity: 900 nodes, 9000 pods, and 1000 events"
node scripts/create-nodes.js 900 0
node scripts/create-pods.js 9000 0
node scripts/create-events.js 1000 0
node scripts/create-deployments.js 500 0
node scripts/create-clusters.js 15 0

Generating Activity​

To make some activity after the initial data is loaded.

echo "---------------"
echo "creating 1 node, 1 pod, and 1 event per second"
node scripts/create-events.js 9000 1 & node scripts/create-nodes.js 100 1 & node scripts/create-pods.js 1000 1 &

Cleaning up clusters​

Kwok clusters can take up a lot of resources even when doing nothing, due to the Kubernetes API server using resources even when idle.

So when you're done, you can delete them like this.

kwokctl delete cluster --name=kwok
node scripts/create-clusters.js 15 0 --delete