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* Configure Kubelet Graceful Node Shutdown to detect system shutdown events and stop running containers gracefully when possible * Allow up to 30s for critical pods to gracefully shutdown * Allow up to 15s for regular pods to gracefully shutdown * Node will be marked as NotReady promptly, instead of having to wait for health checks * Kubelet uses systemd inhibitor locks to delay shutdown for a limited number of seconds * Raise the default max inhibitor time from 5s to 45s Verify systemd inhibitor locks are present: ``` sudo systemd-inhibit --list WHO UID USER PID COMM WHAT WHY MODE kubelet 0 root 4581 kubelet shutdown Kubelet needs time to handle node shutdown delay ``` Tail journal logs and then shutdown a node via systemctl reboot or via the cloud console to watch container shutdown Rel: * https://kubernetes.io/blog/2021/04/21/graceful-node-shutdown-beta/ * https://kubernetes.io/docs/reference/config-api/kubelet-config.v1beta1/ * https://github.com/kubernetes/kubernetes/issues/107043 * https://github.com/coreos/fedora-coreos-tracker/issues/821 * https://www.freedesktop.org/software/systemd/man/systemd-inhibit.html * https://github.com/kubernetes/kubernetes/blob/release-1.24/pkg/kubelet/nodeshutdown/nodeshutdown_manager_linux.go * https://github.com/godbus/dbus/blob/master/conn.go |
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Typhoon 
Typhoon is a minimal and free Kubernetes distribution.
- Minimal, stable base Kubernetes distribution
- Declarative infrastructure and configuration
- Free (freedom and cost) and privacy-respecting
- Practical for labs, datacenters, and clouds
Typhoon distributes upstream Kubernetes, architectural conventions, and cluster addons, much like a GNU/Linux distribution provides the Linux kernel and userspace components.
Features 
- Kubernetes v1.25.0 (upstream)
- Single or multi-master, Calico or Cilium or flannel networking
- On-cluster etcd with TLS, RBAC-enabled, network policy
- Advanced features like worker pools, preemptible workers, and snippets customization
- Ready for Ingress, Prometheus, Grafana, CSI, and other optional addons
Docs
Please see the official docs and the Google Cloud tutorial.