Create production cluster

EKS Anywhere supports a vSphere provider for production grade EKS Anywhere deployments. EKS Anywhere allows you to provision and manage Amazon EKS on your own infrastructure.

This document walks you through setting up EKS Anywhere in a way that:

Deploys an initial cluster on your vSphere environment. That cluster can be used as a self-managed cluster (to run workloads) or a management cluster (to create and manage other clusters)
Deploys zero or more workload clusters from the management cluster

If your initial cluster is a management cluster, it is intended to stay in place so you can use it later to modify, upgrade, and delete workload clusters. Using a management cluster makes it faster to provision and delete workload clusters. Also it lets you keep vSphere credentials for a set of clusters in one place: on the management cluster. The alternative is to simply use your initial cluster to run workloads.

Important

Creating an EKS Anywhere management cluster is the recommended model. Separating management features into a separate, persistent management cluster provides a cleaner model for managing the lifecycle of workload clusters (to create, upgrade, and delete clusters), while workload clusters run user applications. This approach also reduces provider permissions for workload clusters.

Prerequisite Checklist

EKS Anywhere needs to be run on an administrative machine that has certain machine requirements . An EKS Anywhere deployment will also require the availability of certain resources from your VMware vSphere deployment .

Steps

The following steps are divided into two sections:

Create an initial cluster (used as a management or self-managed cluster)
Create zero or more workload clusters from the management cluster

Create an initial cluster

Follow these steps to create an EKS Anywhere cluster that can be used either as a management cluster or as a self-managed cluster (for running workloads itself).

Generate an initial cluster config (named mgmt for this example):

CLUSTER_NAME=mgmt
eksctl anywhere generate clusterconfig $CLUSTER_NAME \
   --provider vsphere > eksa-mgmt-cluster.yaml

Modify the initial cluster config (eksa-mgmt-cluster.yaml) as follows:
- Refer to vsphere configuration for information on configuring this cluster config for a vSphere provider.
- Create at least two control plane nodes, three worker nodes, and three etcd nodes for a production cluster, to provide high availability and rolling upgrades.
- Optionally, configure the cluster for OIDC , etcd , proxy , gitops and/or a container registry mirror .
Set Credential Environment Variables

Before you create the initial cluster, you will need to set and export these environment variables for your vSphere user name and password. Make sure you use single quotes around the values so that your shell does not interpret the values:
```
export EKSA_VSPHERE_USERNAME='billy'
export EKSA_VSPHERE_PASSWORD='t0p$ecret'
```
Set License Environment Variable

If you are creating a licensed cluster, set and export the license variable (see License cluster if you are licensing an existing cluster):
```
export EKSA_LICENSE='my-license-here'
```
Create the initial cluster

After you have created your eksa-mgmt-cluster.yaml and set your credential environment variables, you will be ready to create the cluster:
```
eksctl anywhere create cluster -f eksa-mgmt-cluster.yaml
```
Once the cluster is created you can use it with the generated KUBECONFIG file in your local directory:
```
export KUBECONFIG=${PWD}/${CLUSTER_NAME}/${CLUSTER_NAME}-eks-a-cluster.kubeconfig
```

Check the cluster nodes:

To check that the cluster completed, list the machines to see the control plane, etcd, and worker nodes:

kubectl get machines -A

Example command output

NAMESPACE   NAME                PROVIDERID        PHASE    VERSION
eksa-system mgmt-b2xyz          vsphere:/xxxxx    Running  v1.21.2-eks-1-21-5
eksa-system mgmt-etcd-r9b42     vsphere:/xxxxx    Running  
eksa-system mgmt-md-8-6xr-rnr   vsphere:/xxxxx    Running  v1.21.2-eks-1-21-5
...

The etcd machine doesn’t show the Kubernetes version because it doesn’t run the kubelet service.

Check the initial cluster’s CRD:

To ensure you are looking at the initial cluster, list the CRD to see that the name of its management cluster is itself:
```
kubectl get clusters mgmt -o yaml
```
Example command output
```
...
kubernetesVersion: "1.21"
managementCluster:
  name: mgmt
workerNodeGroupConfigurations:
...
```
Note
The initial cluster is now ready to deploy workload clusters. However, if you just want to use it to run workloads, you can deploy pod workloads directly on the initial cluster without deploying a separate workload cluster and skip the section on running separate workload clusters.

Create separate workload clusters

Follow these steps if you want to use your initial cluster to create and manage separate workload clusters.

Generate a workload cluster config:
```
CLUSTER_NAME=w01
eksctl anywhere generate clusterconfig $CLUSTER_NAME \
   --provider vsphere > eksa-w01-cluster.yaml
```
Refer to the initial config described earlier for the required and optional settings. The main differences are that you must have a new cluster name and cannot use the same vSphere resources.
Create a workload cluster

To create a new workload cluster from your management cluster run this command, identifying:
- The workload cluster yaml file
- The initial cluster’s credentials (this causes the workload cluster to be managed from the management cluster)
```
eksctl anywhere create cluster \
    -f eksa-w01-cluster.yaml  \
    --kubeconfig mgmt/mgmt-eks-a-cluster.kubeconfig
```
As noted earlier, adding the --kubeconfig option tells eksctl to use the management cluster identified by that kubeconfig file to create a different workload cluster.
Check the workload cluster:

You can now use the workload cluster as you would any Kubernetes cluster. Change your credentials to point to the new workload cluster (for example, mgmt-w01), then run the test application with:
```
export CLUSTER_NAME=mgmt-w01
export KUBECONFIG=${PWD}/${CLUSTER_NAME}/${CLUSTER_NAME}-eks-a-cluster.kubeconfig
kubectl apply -f "https://anywhere.eks.amazonaws.com/manifests/hello-eks-a.yaml"
```
Verify the test application in the deploy test application section .
Add more workload clusters:

To add more workload clusters, go through the same steps for creating the initial workload, copying the config file to a new name (such as eksa-w02-cluster.yaml), modifying resource names, and running the create cluster command again.

See the Cluster management section with more information on common operational tasks like scaling and deleting the cluster.