castai-hello-world

# CAST AI Hello World ## Overview First API calls against the CAST AI REST API: list connected clusters, retrieve the savings report, and inspect node inventory. All examples use `curl` with the `X-API-Key` header -- no SDK required. ## Prerequisites - Completed `castai-install-auth` setup - `CASTAI_API_KEY` environment variable set - At least one cluster connected to CAST AI ## Instructions ### Step 1: List Connected Clusters ```bash curl -s -H "X-API-Key: ${CASTAI_API_KEY}" \ https://api.cast.ai/v1/kubernetes/external-clusters \ | jq '.items[] | {id, name, status, providerType}' ``` Expected output: ```json { "id": "abc123-def456", "name": "production-eks", "status": "ready", "providerType": "eks" } ``` ### Step 2: Get Cluster Savings Report ```bash export CASTAI_CLUSTER_ID="your-cluster-id" # Current month savings curl -s -H "X-API-Key: ${CASTAI_API_KEY}" \ "https://api.cast.ai/v1/kubernetes/clusters/${CASTAI_CLUSTER_ID}/savings" \ | jq '{ monthlySavings: .monthlySavings, savingsPercentage: .savingsPercentage, currentCost: .currentMonthlyCost, optimizedCost: .optimizedMonthlyCost }' ``` ### Step 3: List Cluster Nodes ```bash curl -s -H "X-API-Key: ${CASTAI_API_KEY}" \ "https://api.cast.ai/v1/kubernetes/external-clusters/${CASTAI_CLUSTER_ID}/nodes" \ | jq '.items[] | { name: .name, instanceType: .instanceType, lifecycle: .lifecycle, cpu: .allocatableCpu, memory: .allocatableMemory, zone: .zone }' `...