# 1.21.14-do.0

DigitalOcean Kubernetes (DOKS) is a Kubernetes service with a fully managed control plane, high availability, and autoscaling. DOKS integrates with standard Kubernetes toolchains and DigitalOcean’s load balancers, volumes, CPU and GPU Droplets, API, and CLI.

- Updates to system components:

  - Updated to kernel to [Linux 5.10.120](https://packages.debian.org/buster-backports/linux-image-5.10.0-0.bpo.15-amd64-unsigned).

    - This is an upgrade from Linux 4.19 on earlier DOKS 1.21 patch versions. This upgrade is necessary to address a limitation in BPF program size on kernels prior to Linux 5.1 that can lead to degraded cluster state where worker nodes are unable to provision new network namespaces for pods.
  - Updated to [Kubernetes v1.21.14](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.21.md#v12114)
- Changes to system components:

  - Disabled Cilium’s eBPF-based NodePort handling in favor of kube-proxy’s as it does not support graceful termination properly in v1.10. (This also disables the eBPF implementations for features depending on NodePort handling in Cilium in favor of kube-proxy, namely host IP and external IP processing.)