The Master Cluster hosts the KKP components and might also act as a seed cluster and host the master components of customer clusters (see Architecture). Therefore, it should run in Highly Available setup with at least 3 master nodes and 3 worker nodes.
Minimal Requirements:
The User Cluster is a Kubernetes cluster created and managed by KKP. The exact requirements may depend on the type of workloads that will be running in the user cluster.
Minimal Requirements:
product_uuid
Are Unique for Every Nodeip link
or ifconfig -a
sudo cat /sys/class/dmi/id/product_uuid
It is very likely that hardware devices will have unique addresses, although some virtual machines may have identical values. Kubernetes uses these values to uniquely identify the nodes in the cluster. If these values are not unique to each node, the installation process may fail.
If you have more than one network adapter, and your Kubernetes components are not reachable on the default route, we recommend you add IP route(s) so Kubernetes cluster addresses go via the appropriate adapter.
Protocol | Direction | Port Range | Purpose |
---|---|---|---|
TCP | Inbound | 6443* | Kubernetes API server |
TCP | Inbound | 2379-2380 | etcd server client API |
TCP | Inbound | 10250 | kubelet API |
TCP | Inbound | 10251 | kube-scheduler |
TCP | Inbound | 10252 | kube-controller-manager |
TCP | Inbound | 10255 | Read-only kubelet API |
Protocol | Direction | Port Range | Purpose |
---|---|---|---|
TCP | Inbound | 10250 | kubelet API |
TCP | Inbound | 10255 | Read-only kubelet API |
TCP | Inbound | 30000-32767 | NodePort Services** |
** Default port range for NodePort Services.
Any port numbers marked with * are overridable, so you will need to ensure any custom ports you provide are also open.