CLEVER

Container Level Energy-efficient VPA Recommender for Kubernetes

Pre-requisites

• Baremetal Node OS - RedHat 8
• Kubernetes 1.22+
• Kepler v0.2
• Prometheus release-0.11
• Kubernetes Vertical Pod Autoscaler (VPA) 0.11

Installation

Install Kepler

• Follow the instructions in the Kepler to install Kepler as DaemonSets on nodes of the Kubernetes Cluster.

Install Prometheus & Grafana Dashboard

• Follow the instructions in the kube-prometheus to install both Prometheus and Grafana on the Kubernetes Cluster.
• Import the Grafana Dashboard. The dashboard is available in the dashboards/clever-dashboard.json folder.
• Access Prometheus UI and Grafana Dashboard via kubectl port-forward command following the Access UIs tutorial.

Install VPA

• Follow the instructions here to install the VPA on the Kubernetes Cluster.

Install CLEVER

• Clone the CLEVER repository

git clone https://github.com/sustainable-computing-io/clever.git

• Deploy CLEVER Recommender to run as an alternative recommender for VPA.

kubectl apply -f manifests/clever.yaml

Tutorial

• Deploy the example application that selects the CLEVER recommender for VPA.

kubectl apply -f manifests/random.yaml

• The example application defines a VPA Custom Resource with the following configuration:

apiVersion: "autoscaling.k8s.io/v1"
kind: VerticalPodAutoscaler
metadata:
  name: random-vpa
spec:
  recommenders:
    - name: clever
  targetRef:
    apiVersion: "apps/v1"
    kind: Deployment
    name: random
  resourcePolicy:
    containerPolicies:
      - containerName: '*'
        minAllowed:
          cpu: 100m
        maxAllowed:
          cpu: 16
        controlledResources: ["cpu"]

• Monitor the recommended CPU requests for the example application by watching the VPA object.

watch -n 0.1 ./scripts/vpa.sh random-vpa

• Change the node CPU frequencies to observe the effect on the recommended CPU requests.

./scripts/set_cpu_freq.sh 1GHz