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Features

Kube-Hetzner comes with a rich set of features that make it a powerful and flexible solution for deploying Kubernetes clusters on Hetzner Cloud.

Maintenance and Upgrades​

  • Auto-upgrades: Both MicroOS and k3s automatically upgrade to keep your cluster secure and up-to-date
  • Rolling updates: Zero-downtime upgrades with proper node draining and rebooting
  • Automatic rollbacks: BTRFS snapshots ensure that failed updates automatically roll back

Architecture Support​

  • Multi-architecture: Supports both x86 and ARM instances (CAX series)
  • Flexible node types: Choose from any Hetzner Cloud instance type for your nodes

Networking​

  • Private network: All inter-node communication happens over Hetzner's private network
  • Multiple CNI options: Choose between Flannel, Calico, or Cilium
  • Wireguard encryption: Optional encryption of the Kubernetes network
  • IPv6 support: Full IPv6 support for both inbound and outbound traffic

Ingress Controllers​

  • Multiple options: Traefik, Nginx, or HAProxy
  • Load balancer integration: Automatically attaches to Hetzner Load Balancers with Proxy Protocol

High Availability​

  • Default HA: Three control-plane nodes and two agent nodes by default
  • Super-HA: Nodepools for both control-plane and agent nodes in different locations
  • Automatic failover: Built-in redundancy and failover mechanisms

Scaling​

  • Manual scaling: Easily add or remove nodes from existing nodepools
  • Autoscaling: Kubernetes Cluster Autoscaler integration for automatic node scaling
  • Flexible nodepools: Create and manage multiple nodepools with different configurations

Storage​

  • Longhorn support: Built-in support for Longhorn distributed block storage
  • Hetzner CSI: Integration with Hetzner Cloud Volumes via CSI driver
  • Encryption at rest: Full encryption support for both storage solutions

Security​

  • MicroOS base: Immutable, read-only filesystem for enhanced security
  • Automatic IP banning: SSH brute force protection built into MicroOS
  • SELinux support: Enhanced security with SELinux profiles

Customization​

  • Kustomize integration: Easy customization of cluster components
  • Helm support: Built-in Helm controller for managing applications
  • Flexible configuration: Extensive variables for customizing every aspect