How can nodes be added to a k8s cluster?
There are two main methods for adding nodes to a Kubernetes cluster: manual addition and automatic scaling.
- Manually add nodes.
- Install Kubernetes components on the machine where the node needs to be added and configure Kubelet and Kube-proxy.
- Modify the cluster configuration on the Kubernetes control plane node to include the information of the new node in the cluster.
- Add a new node to the cluster using the kubeadm join command.
- You can use the “kubectl get nodes” command to check the status of the new node joining the cluster.
- Automatic expansion:
- You can take advantage of the auto-scaling feature provided by cloud service providers.
- Set up an automatic scaling strategy to add new nodes automatically when cluster resources are insufficient.
- After a new node is launched, Kubernetes’ automatic discovery mechanism will automatically add the new node to the cluster.
Whether adding nodes manually or automatically, it is important to prepare adequately before adding a new node to ensure it can be properly integrated into the cluster without affecting its stability.
