castai-upgrade-migration

# CAST AI Upgrade & Migration ## Overview Upgrade CAST AI components: Helm charts for the agent/controller/evictor, Terraform provider version, and workload autoscaler. Includes rollback procedures for each component. ## Prerequisites - Current CAST AI components installed - Staging cluster for testing upgrades first - Helm and kubectl access - Change management approval for production ## Instructions ### Step 1: Check Current Versions ```bash # Helm chart versions helm list -n castai-agent -o json | jq '.[] | {name: .name, chart: .chart, appVersion: .app_version}' # Available versions helm repo update helm search repo castai-helm --versions | head -20 # Terraform provider version grep "castai/castai" .terraform.lock.hcl terraform providers ``` ### Step 2: Review Changelog ```bash # Check CAST AI changelog for breaking changes # https://docs.cast.ai/changelog/ # Check Terraform provider releases # https://github.com/castai/terraform-provider-castai/releases ``` ### Step 3: Upgrade on Staging First ```bash # Upgrade agent helm upgrade castai-agent castai-helm/castai-agent \ -n castai-agent --reuse-values # Upgrade cluster controller helm upgrade cluster-controller castai-helm/castai-cluster-controller \ -n castai-agent --reuse-values # Upgrade evictor helm upgrade castai-evictor castai-helm/castai-evictor \ -n castai-agent --reuse-values # Upgrade workload autoscaler helm upgrade castai-workload-autoscaler castai-helm/castai-workload-autoscaler \ -n ca...