156-cast.sh

# Source: https://gist.github.com/17b9c1f01baa4064e1e7633b03f4e5b8

##########################################################
# Cost-Aware Kubernetes Cluster Autoscaling With Cast AI #
# https://youtu.be/r2VS8DV1Lpk                           #
##########################################################

# Additional Info:
# - https://cast.ai
# - How To Auto-Scale Kubernetes Clusters With Karpenter: https://youtu.be/C-2v7HT-uSA

#########
# Setup #
#########

# Create an AWS EKS, GCP GKE, Azure AKS, or AWS KOPS cluster

# Do NOT use cluster autoscaler

git clone https://github.com/vfarcic/cast-demo

cd cast-demo

helm repo add prometheus \
    https://prometheus-community.github.io/helm-charts

helm repo update

helm upgrade --install \
    prometheus prometheus/prometheus \
    --namespace monitoring \
    --create-namespace \
    --wait

helm repo add crossplane-stable \
    https://charts.crossplane.io/stable

helm repo update

helm upgrade --install \
    crossplane crossplane-stable/crossplane \
    --namespace crossplane-system \
    --create-namespace \
    --wait

kubectl create namespace production

kubectl --namespace production apply \
    --kustomize kustomize/overlays/production

############################################################
# Exploring Cast AI Kubernetes Autoscaling And Rebalancing #
############################################################

# Open https://cast.ai in a browser

# Open kustomize/base/deployment.yaml in an editor.
# Add the following entries:
#   `scheduling.cast.ai/spot: "true"` to `spec.template.spec.nodeSelector`
#   `- key: scheduling.cast.ai/spot` and `operator: Exists` to `spec.template.spec.tolerations`
# Change `spec.replicas: 1` to `spec.replicas: 20`

kubectl --namespace production apply \
    --kustomize kustomize/overlays/production

###########
# Destroy #
###########

cp orig/deployment.yaml kustomize/base/.

# Disconnect the cluster from Cast AI (that will delete the nodes created by it)

# Destroy the cluster