Create CloudStack production cluster

Create a production-quality cluster on CloudStack

EKS Anywhere supports a CloudStack provider for production grade EKS Anywhere deployments. This document walks you through setting up EKS Anywhere on CloudStack in a way that:

Deploys an initial cluster on your CloudStack environment. That cluster can be used as a standalone 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 CloudStack 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. See Cluster topologies for details.

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 Admin machine that has certain machine requirements .
Have certain resources from your CloudStack deployment available.
Have some preparation done before creating an EKS Anywhere cluster.

Also, see the Ports and protocols page for information on ports that need to be accessible from control plane, worker, and Admin machines.

Steps

The following steps are divided into two sections:

Create an initial cluster (used as a management or standalone 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 standalone cluster (for running workloads itself).

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

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

Create credential file

Create a credential file (for example, cloud-config) and add the credentials needed to access your CloudStack environment. The file should include:
- api-key: Obtained from CloudStack
- secret-key: Obtained from CloudStack
- api-url: The URL to your CloudStack API endpoint
For example:
```
[Global]
api-key     =  -Dk5uB0DE3aWng
secret-key  =  -0DQLunsaJKxCEEHn44XxP80tv6v_RB0DiDtdgwJ
api-url     =  http://172.16.0.1:8080/client/api
```
You can have multiple credential entries. To match this example, you would enter global as the credentialsRef in the cluster config file for your CloudStack availability zone. You can configure multiple credentials for multiple availability zones.
Modify the initial cluster config (eksa-mgmt-cluster.yaml) as follows:
- Refer to Cloudstack configuration for information on configuring this cluster config for a CloudStack provider.
- Add Optional configuration settings as needed.
- 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.
Set Environment Variables

Convert the credential file into base64 and set the following environment variable to that value:
```
export EKSA_CLOUDSTACK_B64ENCODED_SECRET=$(base64 -i cloud-config)
```
Set License Environment Variable

Add a license to any cluster for which you want to receive paid support. 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'
```
Configure Curated Packages

The Amazon EKS Anywhere Curated Packages are only available to customers with the Amazon EKS Anywhere Enterprise Subscription. To request a free trial, talk to your Amazon representative or connect with one here . Cluster creation will succeed if authentication is not set up, but some warnings may be generated. Detailed package configurations can be found here .

If you are going to use packages, set up authentication. These credentials should have limited capabilities :
```
export EKSA_AWS_ACCESS_KEY_ID="your*access*id"
export EKSA_AWS_SECRET_ACCESS_KEY="your*secret*key"
export EKSA_AWS_REGION="us-west-2"  
```
Disable Kubevip load balancer

Skip this step if you want to use the Kubevip load balancer with your cluster. If you want to use a different load balancer, you can disable Kubevip as follows:
```
export CLOUDSTACK_KUBE_VIP_DISABLED=true
```

Create cluster

eksctl anywhere create cluster \
   # --install-packages packages.yaml \ # uncomment to install curated packages at cluster creation
   -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          cloudstack:/xxxxx    Running  v1.23.1-eks-1-21-5
eksa-system mgmt-etcd-r9b42     cloudstack:/xxxxx    Running  
eksa-system mgmt-md-8-6xr-rnr   cloudstack:/xxxxx    Running  v1.23.1-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: "1.23"
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. To make sure the cluster is ready to run workloads, run the test application in the Deploy test workload section.

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 cloudstack > eksa-w01-cluster.yaml

Modify the workload cluster config (eksa-w01-cluster.yaml) as follows. Refer to the initial config described earlier for the required and optional settings. In particular:
- Ensure workload cluster object names (Cluster, CloudDatacenterConfig, CloudStackMachineConfig, etc.) are distinct from management cluster object names.
Be sure to set the managementCluster field to identify the name of the management cluster.

For example, the management cluster, mgmt is defined for our workload cluster w01 as follows:
```
apiVersion: anywhere.eks.amazonaws.com/v1alpha1
kind: Cluster
metadata:
  name: w01
spec:
  managementCluster:
    name: mgmt
```
Set License Environment Variable

Add a license to any cluster for which you want to receive paid support. 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 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  \
    # --install-packages packages.yaml \ # uncomment to install curated packages at cluster creation
    --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.

Next steps:

See the Cluster management section for more information on common operational tasks like scaling and deleting the cluster.
See the Package management section for more information on post-creation curated packages installation.