Kubernetes

Walkthrough guide to install Ondat onto a generic Kubernetes Cluster.

Overview

This guide will demonstrate how to install Ondat onto a Kubernetes cluster using the Ondat kubectl plugin or Helm Chart

For users who are looking to deploy Ondat onto a managed/specific Kubernetes distribution such AKS, EKS, GKE, RKE or DOKS, a recommendation would be to review the Install section and choose the appropriate installation guide for your Kubernetes distribution.

Prerequisites

1 - Cluster and Node Prerequisites

The minimum cluster requirements for a non-production installation of ondat are as follows:

  • Linux with a 64-bit architecture
  • 2 vCPU and 4GB of RAM per node.
  • 3 worker nodes in the cluster and sufficient Role-Based Access Control (RBAC) permissions to deploy and manage applications in the cluster
  • Make sure the OS on your nodes are compatible with Ondat. See the Ondat Prerequisites for all supported linux distributions.

For a comprehensive list of prerequisites and how to build a production installation of Ondat please refer to Ondat Prerequisites

2 - Client Tools Prerequisites

The following CLI utilities are installed on your local machine and available in your $PATH:

Ondat can be installed either via Helm Chart or using our command-line tool. Depending on which installation method you choose you will require either:

3 - Installing a Local Path Provisioner

Depending on the kubernetes distro you are using there may not be any CSI driver deployed. Run the following commands against the cluster to deploy a Local Path Provisioner and make it the default storageclass to provide local storage for Ondat’s embedded etcd cluster operator deployment.

kubectl apply --filename="https://raw.githubusercontent.com/rancher/local-path-provisioner/v0.0.22/deploy/local-path-storage.yaml"
kubectl patch storageclass local-path -p '{"metadata": {"annotations":{"storageclass.kubernetes.io/is-default-class":"true"}}}'

Verify that the Local Path Provisioner was successfully deployed and ensure that that the deployment is in a RUNNING status, run the following kubectl commands.

kubectl get pod --namespace=local-path-storage
kubectl get storageclass

Installation of Ondat

Step 1 - Adding a Cluster

The Ondat Portal is how you can license and get the commands for installing Ondat

  • Either login or create an account on the Ondat Portal
  • Choose the ‘Install Ondat on your cluster’ or ‘Add cluster’ options in the UI
  • Add a Name for your cluster and where it is going to be located. This will allow you to view the same prerequisites as are listed above

Step 2 - Choosing the Installation Method

You can use either the kubectl-storageos CLI or Helm 3 CLI to install Ondat onto your cluster. The most common way is to use Helm due to its popularity in the Kubernetes community, but both are fully supported and described below.

Step 3a - Installing via Helm

The Ondat Portal UI will display the following cmd that can be used to install Ondat using Helm. The command created will be unique for you and the screenshot below is just for reference.

Helm Install

The first two lines of the command adds the Ondat Helm repository and ensures a updated local cache. The remaining command installs Ondat via Helm with a set of basic install parameters that are sufficient for a basic trial installation and to connect the Ondat installation with your portal account for licensing. The installation process may take a few minutes. The end of this guide contains information on verifying the installation and licensing.

Step 3b - Installing via kubectl-storageos plugin

The Ondat Portal UI will display the following cmd that can be used to install Ondat using the kubectl-storageos plugin. The command created will be unique for you and the screenshot below is just for reference.

kubectl-storageos Install

The command that is provided by the Portal is unique to you and uses the kubectl-storageos plugin command with a set of basic install parameters that are sufficient for a basic trial installation and to connect the Ondat installation with your portal account for licensing. The installation process may take a few minutes. The end of this guide contains information on verifying the installation and licensing.

Step 4 - Verifying Ondat Installation

Run the following kubectl commands to inspect Ondat’s resources (the core components should all be in a RUNNING status)

kubectl get all --namespace=storageos
kubectl get all --namespace=storageos-etcd
kubectl get storageclasses | grep "storageos"

Once all the components are up and running the output should look like this:

Install Success

Step 5 - Applying a Licence to the Cluster

Newly installed Ondat clusters must be licensed within 24 hours. For details of our Community Edition and pricing see here.

To licence your cluster with the community edition:

  1. On the Clusters page select ‘View Details’
  2. Click on ‘Change Licence’
  3. In the following pop-up select the ‘Community Licence’ option then click ‘Generate’

This process generates a licence and installs it for you. Now you are good to go!