Before installing Usage Engine Private Edition, you need to set up a Kubernetes cluster on OCI OKE (Oracle’s managed Kubernetes service).

First, you need to create a basic Kubernetes cluster. You can do this in two different ways:

• Using the terraform tool.

• Using the OCI management console.

In this guide, terraform will be used, mainly because it will enable you to create the basic Kubernetes cluster in minutes with just a single command.

Once the basic Kubernetes cluster has been created, you need to add additional infrastructure. You can use terraform for this as well.

Before proceeding, go to Release Information, and download the oci.tar.gz file for the Usage Engine Private Edition version that you want to install. 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 that you have an existing parent domain, in the example below example.com, hosted on the same account as the cluster that we are going to create in the following section and that you want to access the cluster environment via the hostname. Terraform will create a subdomain in the following format: <cluster_name>.<domain>.

   1. cluster name: uepe-oke

   2. domain: example.com

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

2. We also assume that terraform is allowed to add a NS (NameServer) record to the parent domain which is needed to allow DNS delegation from the parent domain to subdomain.

3. 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 multiple persons are working on the infrastructure, then it is recommended to store the state file using a remote persistence such as Object Storage, see https://docs.oracle.com/en-us/iaas/Content/API/SDKDocs/terraformUsingObjectStore.htm for more information.

4. The OCI File System service (NFS) is used as the default persistent storage for data that needs to be persisted.

5. The OCI Managed PostgreSQL service is used as the Usage Engine Private Edition database.

6. The user Principle is used throughout the entire installation. The user must prepare the private key file locally. The user can create and download the private key via the OCI console by selecting Profile | My Profile | API keys | Add API key.

Create Basic Cluster and additional infrastructure

To create a basic Kubernetes cluster with public and private VPC:

1. Go to <folder 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 (see Compatibility Matrix (4.2) to find out which Kubernetes versions that are compatible with this release of Usage Engine Private Edition). 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 are going to use another database than Derby, specify db_password, db_version and db_username.

oci ce node-pool-options get --node-pool-option-id all --compartment-id <your compartment ocid>.

#  ____  _____ _____   _____ _   _ _____ ____  _____
# / ___|| ____|_   _| |_   _| | | | ____/ ___|| ____|_
# \___ \|  _|   | |     | | | |_| |  _| \___ \|  _| (_)
#  ___) | |___  | |     | | |  _  | |___ ___) | |___ _
# |____/|_____| |_|     |_| |_| |_|_____|____/|_____(_)

# The below values must be set explicitly in order for the setup to work correctly.

tenancy_ocid     = "ocid1.tenancy.oc1..aaaaaaaamnl7f7t2yrlas2si7b5hpo6t23dqi6mjo3eot6ijl2nqcog5h6ha"
fingerprint      = "7d:67:b3:9d:a3:8f:6d:37:f3:e9:7d:e5:45:ec:df:56"
user_ocid        = "ocid1.user.oc1..aaaaaaaauhk3uhiryg7sw2xjmvf45zasduqwr2cium53gmdxwipe4iqdrfuq"
private_key_path = "/Users/kamheng.choy/Downloads/kamheng.choy@digitalroute.com_2024-04-07T10_07_56.490Z.pem"

# Deployment compartment
compartment_ocid = "ocid1.compartment.oc1..aaaaaaaa56wmblidgvvicamsqkf7sqcqu5yxdhvu3wlvomzgonhflcrv6kcq"

# region
region = "eu-frankfurt-1"

# Name of the cluster, it must be unique in the project.
cluster_name = "test-uepe-cluster-1"

# Domain DNS name
# We'll create a subdomain zone from parent domain, the final domain will be in format "<cluster_name>.<domain>".
# Please note that if this domain is hosted on another OCI project or other cloud provider, then you must
# set auto_create_ns_record = false and manually add the subdomain NS record to the parent domain.
# auto_create_ns_record = false
domain = "stratus.oci.digitalroute.net"

# Admin user password to the database
db_password = "super_SeCrEt_db_pAsSwOrD_457!"

#  _______        _______    _    _  __    _    ____  _     _____
# |_   _\ \      / / ____|  / \  | |/ /   / \  | __ )| |   | ____|_
#   | |  \ \ /\ / /|  _|   / _ \ | ' /   / _ \ |  _ \| |   |  _| (_)
#   | |   \ V  V / | |___ / ___ \| . \  / ___ \| |_) | |___| |___ _
#   |_|    \_/\_/  |_____/_/   \_\_|\_\/_/   \_\____/|_____|_____(_)

# The below sections are the default values, tweak them to your needs.

# Kubernetes version
kubernetes_version = "v1.29.1"

# Number of nodes per cluster
oke_num_nodes = 3
# Worker node machine type
node_pool_shape = "VM.Standard.E4.Flex"
oke_availability_domain = "Vafx:EU-FRANKFURT-1-AD-1"

oke_image_id = "ocid1.image.oc1.eu-frankfurt-1.aaaaaaaapwbqurbd2hpmj2at354r3dkok4o4644am4hwgdagoekpcaon7shq"

# IP CIDR range allocate to the control plane
vcn_cidr_blocks = "10.0.0.0/16"

# Network file system (NFS) persistent storage
fss_enabled = true
fss_availability_domain = "Vafx:EU-FRANKFURT-1-AD-1"

# Cloud SQL database
db_enabled = true
# DB instance type
db_instance_shape = "PostgreSQL.VM.Standard.E4.Flex.4.64GB"
# DB version
db_version = "14"

1. Run the following commands:

terraform init
terraform plan
terraform apply

2. Wait until the terraform commands have completed and you see the following kind of information:

Apply complete! Resources: 35 added, 0 changed, 0 destroyed.

Outputs:

backend_nsg = "ocid1.networksecuritygroup.oc1.eu-frankfurt-1.aaaaaaaacreo4kf5kd2n7nk4fn2kcsuv6kye2noowhpjypcmrqmms32gpg3a"
cluster_dns_zone_name = "test-uepe-cluster-1.stratus.oci.digitalroute.net"
cluster_dns_zone_name_servers = [
  "ns1.p201.dns.oraclecloud.net.",
  "ns2.p201.dns.oraclecloud.net.",
  "ns3.p201.dns.oraclecloud.net.",
  "ns4.p201.dns.oraclecloud.net.",
]
cluster_dns_zone_ocid = "ocid1.dns-zone.oc1..aaaaaaaacd5nsfzmir3efo5e2pcuga4t622vcxcqkc3ezizl64e5gofo7dza"
cluster_name = "test-uepe-cluster-1"
cluster_ocid = "ocid1.cluster.oc1.eu-frankfurt-1.aaaaaaaaerg6ctgepnuaipifispmuweqi5nvfhswxpu3luuctcvitslu3fea"
compartment_ocid = "ocid1.compartment.oc1..aaaaaaaa56wmblidgvvicamsqkf7sqcqu5yxdhvu3wlvomzgonhflcrv6kcq"
db_admin_user = "postgres"
db_endpoint = "db5j5pt3qwjqmmjgfremgugr7cxtsq-dbinstance-70c946d1330e.postgresql.eu-frankfurt-1.oc1.oraclecloud.com"
db_port = 5432
filesystem_mount_path = "/uepe"
filesystem_ocid = "ocid1.filesystem.oc1.eu_frankfurt_1.aaaaaaaaaais2zcnmzzgcllqojxwiotfouwwm4tbnzvwm5lsoqwtcllbmqwtgaaa"
kms_key_ocid = ""
loadbalancer_ocid = "ocid1.loadbalancer.oc1.eu-frankfurt-1.aaaaaaaanmx4u2yllufrjetacqt5bsgiyznkg7fif3bjfl36xoduyngesvra"
loadbalancer_subnet_ocid = "ocid1.subnet.oc1.eu-frankfurt-1.aaaaaaaapyqsowgik7gak3wkihsm3jtronnc5klbf46jerjnudrqsnlbco5q"
mount_target_IP_address = "10.0.4.212"
mount_target_subnet_ocid = "ocid1.subnet.oc1.eu-frankfurt-1.aaaaaaaaoh36ywx4rki7qtre33f53amjy2zylm6mnqeix6cydn5ul4shfqja"
region = "eu-frankfurt-1"
tenancy_ocid = "ocid1.tenancy.oc1..aaaaaaaamnl7f7t2yrlas2si7b5hpo6t23dqi6mjo3eot6ijl2nqcog5h6ha"

A basic Kubernetes cluster has now been set up successfully.

An RDS PostgreSQL database instance is up and running on a private subnet VPC with default listening port 5432. The default database postgres is accessible within the cluster at end point db5j5pt3qwjqmmjgfremgugr7cxtsq-dbinstance-70c946d1330e.postgresql.eu-frankfurt-1.oc1.oraclecloud.com with admin username postgres.

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

Configure Cluster Access

To configure cluster access, run the following command:

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

A ./kubeconfig.yaml file containing information on how to connect to your newly created cluster will be generated. Set the KUBECONFIG environment variable to point to that file by running the following command:

export KUBECONFIG=<full path to ./kubeconfig.yaml>

This will ensure that tools like kubectl and helm will connect to your newly created cluster.

You can check the status of the cluster nodes by running the following command:

kubectl get nodes

In this example cluster, the output will look something like this:

NAME         STATUS   ROLES   AGE   VERSION
10.0.2.111   Ready    node    27h   v1.29.1
10.0.2.158   Ready    node    27h   v1.29.1
10.0.2.230   Ready    node    27h   v1.29.1

Namespace

Create a namespace called uepe:

kubectl create namespace uepe

Unless explicitly stated, this is the namespace that is used throughout the remainder of this installation guide.

kubectl get namespaces

This section is now complete and you can proceed to the Kubernetes Cluster Add-ons - OCI (4.2) section.