Launch Kubernetes Cluster

Here are the steps on how to launch Kubernetes on Neevcloud:

Navigate to Dashboard Click on Kubernetes.

To create a Kubernetes cluster, click on "Create Kubernetes" in the top right corner. This will take you to the cluster page where you can select the configuration.

Select Template

Here we can see two types of templates:-

Kubernetes-single-Master

Kubernetes-Multi-Master

Kubernetes Control Plane

• High Availability (HA):- It refers to a system or service's capability to remain operational and accessible to users over extended periods, typically measured as a percentage of uptime. High availability ensures that a system is consistently available and operational, minimizing downtime. Ensure you enable the High Availability feature to create three master nodes working in Active/Active mode. Leave it disabled to create a single master node.

• Master Flavor:- Choose a flavor for the master node.

Kubernetes Workers Pool

• Worker Node: Choose the number of worker nodes.

• Worker Flavor: Choose a flavor for worker nodes, Note that all worker nodes will be of the same flavor.

• Autoscaling, sometimes referred to as automatic scaling or auto-scaling, is a crucial cloud computing service that dynamically adjusts the number of computational resources assigned to an application or service in line with its ongoing workload. This capability aims to ensure that the application remains capable of efficiently managing fluctuating traffic levels or demands, while also optimizing the utilization of resources and reducing expenses. If you enable autoscaling, you should select the worker nodes based on usage.

Cluster Network

If you have already created the network, you can choose an existing network; otherwise, it will work in the default network.

Boot Volume

Boot Volume: The primary storage device or partition containing the operating system, bootloader, and configuration files necessary for a computer to boot. Select storage policy Default and storage size(GB)

Floating IP

By turning on this feature, you will be able to access all your nodes via a public IP address, When you enable the floating IP, you will get an IP for each master and worker node.

SSH KEY

Select the "SSH_KEY": If you already have an SSH key, you can select it. If you do not have one, click "Generate SSH key", follow the provided URL, and scroll down to the key section.

Labels

Labels are key/value pairs that are interpreted and validated by the drivers that use them.

Enter the name of the Kubernetes cluster and click on the Create cluster.

Kubernetes Clusters

Click on the created cluster to learn more details about the cluster

• Overview: This section checks cluster information such as health status, creation status

• Pools: In this section, we verify the status of master and worker nodes to ensure they are active

Networking in Kubernetes Cluster

Go to the Networking section, select the network, click on the Kubernetes cluster you created, and verify the network status.

• Overview: This section provides information on the cluster status, node names, and network resources.

To access Kubernetes outside

To access Kubernetes externally and download kubeconfig.

After downloading the kubeconfig file,

Copy the kubeconfig file into your Linux system. Then SSH into your Linux system and run these commands to execute the YAML file for Kubernetes.

export KUBECONFIG=path of file 

Use the snap command to install the kubectl.

snap install kubectl --classic

Using these commands will display the status of the nodes in your Kubernetes cluster.

kubectl get nodes

To SSH into the Master Node

Navigate to the server dashboard

Identify your master node and its public IP

Navigate to the directory containing your SSH key.

Open the terminal and type ssh -i ssh_key.pem core@ip-address where "ssh_key.pem" is the name of your SSH key and "IP-address" is the public IP address of your master node.