Single node cluster🔗︎

This example demonstrates how to set up a single-node Kubernetes cluster using Kubitect. In a single-node cluster, only one master node needs to be configured. The topology of the Kubernetes cluster deployed in this guide is shown below.

Note

This example skips the explanation of some common configurations such as hosts, network, and node template, as they are already covered in detail in the Getting started (step-by-step) guide.

Preset available

To export the preset configuration, run: kubitect export preset example-single-node

Step 1: Create the configuration🔗︎

To initialize a single-node Kubernetes cluster, you need to specify a single master node in the cluster configuration file.

single-node.yaml

cluster:
  ...
  nodes:
    master:
      instances:
        - id: 1
          ip: 192.168.113.10 # (1)!

Static IP address of the node. If the ip property is omitted, the DHCP lease is requested when the cluster is created.

When no worker nodes are specified, master nodes are labeled as schedulable, which makes them behave as both master and worker nodes. This means that the single master node in the cluster will perform both the control plane functions of a Kubernetes master node and the data plane functions of a worker node.

Final cluster configuration

single-node.yaml

hosts:
  - name: localhost
    connection:
      type: local

cluster:
  name: k8s-cluster
  network:
    mode: nat
    cidr: 192.168.113.0/24
  nodeTemplate:
    user: k8s
    updateOnBoot: true
    ssh:
      addToKnownHosts: true
    os:
      distro: ubuntu22
  nodes:
    master:
      default:
        ram: 4
        cpu: 2
        mainDiskSize: 32
      instances:
        - id: 1
          ip: 192.168.113.10

kubernetes:
  version: v1.28.6
  networkPlugin: calico

Step 2: Applying the configuration🔗︎

To deploy a cluster, apply the configuration file:

kubitect apply --config single-node.yaml