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Kubernetesv1.33
What's New in Kubernetes 1.33 (Octarine)
Kubernetes 1.33 (codename Octarine) graduates sidecar containers to GA, stabilises Dynamic Resource Allocation for GPU workloads, and continues hardening of node memory swap — making it the most AI/accelerator-friendly Kubernetes release yet.
What's New
- 1Sidecar containers graduated to GA — init containers with restartPolicy: Always now fully supported for log shippers, proxies, and secrets agents
- 2Dynamic Resource Allocation (DRA) reaches beta stability — enables first-class GPU, FPGA, and custom accelerator scheduling across multi-tenant clusters
- 3In-place Pod resource resize promoted — change CPU/memory limits without restarting the Pod
- 4Node memory swap support beta — allows Kubernetes nodes to use swap memory for burstable QoS workloads
- 5Structured Authentication Config (v1beta1) — external OIDC/JWT authenticators configurable without restarting kube-apiserver
- 6Topology Aware Routing improvements reduce cross-zone traffic in multi-AZ clusters by up to 30%
- 7Projected volume for ServiceAccount tokens now supports audience-scoped tokens for zero-trust workloads
Breaking Changes
- In-tree cloud provider volume plugins (AWS, Azure, GCP) removed — migrate to external CSI drivers before upgrading
- kubectl apply with server-side apply is now the default — clients using --dry-run=client may see different output
- Minimum etcd version raised to 3.5.x
Upgrade Notes
The in-tree CSI plugin removal is the highest-risk change. Run 'kubectl get csinode' to verify all nodes use external drivers before upgrading. EKS, AKS, and GKE managed clusters handle this automatically.