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Before proceeding, go to Release Information, and download the oci.tar.gz file for the Usage Engine Private Edition version that is being installed. Once downloaded, extract its content to a suitable location.

Assumptions

There are a few assumptions been made when using terraform to create cluster resources:

1. We assume you have an existing parent domain i.e. example.com hosted on the same account as the cluster that we going to create in the coming section and you wish to access the cluster environment through the hostname. Terraform will create a subdomain in format <cluster_name>.<domain>.

   1. cluster name: uepe-oke

   2. domain: example.com

   3. final domain: uepe-oke.example.com

2. In addition, we also assume terraform is allowed to add a NS (NameServer) record to the parent domain. This is to allow DNS delegation from the parent domain to subdomain.

3. Please note that in case your parent domain is not under the same account or your parent domain is hosted in another cloud provider, then you must set auto_create_ns_record to false in the terraform template to disable subdomain NS record auto creation in parent domain.

4. The service hostname that created by Usage Engine Private Edition will be accessible in format <service_name>.<cluster_name>.<domain> i.e. desktop-online.uepe-oke.example.com.

5. Terraform needs to persist the state of your provisioned infrastructure, by default the state file is stored locally on the computer that terraform is executed from. However if you have multiple person working on the infrastructure then it is recommended to store the state file on remote persistent such as Object Storage, see https://docs.oracle.com/en-us/iaas/Content/API/SDKDocs/terraformUsingObjectStore.htm for more information.

6. We use the OCI File System service (NFS) as the default persistent storage for data needs to be persisted.

7. We use the OCI Managed PostgreSQL service for Usage Engine Private Edition database.

Create Basic Cluster and additional infrastructure

The following steps explains how to create a basic Kubernetes cluster with public and private VPC:

1. Go to <the location where you extracted the oci.tar.gz file>/oci/terraform and copy theterraform.tfvars.example to terraform.tfvars.

2. Edit the terraform.tfvars file.

3. Specify the desired cluster name, OCI region and kubernetes_version (please refer to the Compatibility Matrix (4.1) to find out which Kubernetes versions that are compatible with this release of Usage Engine Private Edition). Also specify your OCI tenancy_ocid, user_ocid, fingerprint, compartment_ocid and private_key_path (which can be found on the OCI dashboard’s Profile page), as well as the desired number of nodes per cluster (oke_num_nodes).

4. If you will be running with a database other than Derby also specify db_password, db_version and db_username.

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You can check the status of the cluster, db and the other resources in the OCI dashboard.

Configure Cluster Access

oci ce cluster create-kubeconfig --cluster-id <cluster ocid> --file ./kubeconfig.yaml --region eu-frankfurt-1 --token-version 2.0.0  --kube-endpoint PUBLIC_ENDPOINT

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