6. How to configure HI GIO Kunernetes cluster autoscale

Overview

Step-by-step guide on how to configure HI GIO Kubernetes cluster autoscale

Install tanzu-cli
#Install tanzu-cli to ubuntu sudo apt update sudo apt install -y ca-certificates curl gpg sudo mkdir -p /etc/apt/keyrings curl -fsSL https://storage.googleapis.com/tanzu-cli-installer-packages/keys/TANZU-PACKAGING-GPG-RSA-KEY.gpg | sudo gpg --dearmor -o /etc/apt/keyrings/tanzu-archive-keyring.gpg echo "deb [signed-by=/etc/apt/keyrings/tanzu-archive-keyring.gpg] https://storage.googleapis.com/tanzu-cli-installer-packages/apt tanzu-cli-jessie main" | sudo tee /etc/apt/sources.list.d/tanzu.list sudo apt update sudo apt install -y tanzu-cli #Verify tanzu-cli installation tanzu version

To install tanzu-cli in other environments, please refer to the documentation below:

Switched to your Kubernetes context
kubectl config use-context <your context name>
List available cluster-autoscaler in tanzu package and note the version name
tanzu package available list cluster-autoscaler.tanzu.vmware.com
Create kubeconfig secret name cluster-autoscaler-mgmt-config-secret in cluster kube-system namespace

Configure the minimum and maximum number of nodes in your cluster
- Get machinedeployments name and namespace
- Set cluster-api-autoscaler-node-group-min-size and cluster-api-autoscaler-node-group-max-size
Enable cluster autoscale for your cluster

Create test-autoscale.yaml file
Apply test-autoscale.yaml file to deploy 2 replicas of nginx pod in the default namespace (it will trigger to create a new worker node)
Get nginx deployment

Waiting for a new node to be provisioned, then you can see a new worker node has been provisioned and new nginx pod status is running
Clean up test resource

End.