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OpenShift 4.6 UPI Deployment with Static IPs

Deploy OpenShift 4.6 and later using static IP addresses for CoreOS nodes. The ignition module will inject code into the cluster that will automatically approve all node CSRs. This runs only once at cluster creation. You can delete the ibm-post-deployment namespace once your cluster is up and running.

NOTE: This requires OpenShift 4.6 or later to deploy, if you're looking for 4.5 or earlier, take a look at the pre-4.6 branch

NOTE: Requires terraform 0.13 or later.

Architecture

OpenShift 4.6 User-Provided Infrastructure

topology

Prereqs

  1. DNS needs to be configured for external cluster access.
    • api.cluster_id.base_domain points to openshift_api_virtualip
    • *.apps.cluster_id.base_domain points to openshift_ingress_virtualip
    • Point both of those DNS A or CNAME records to your LoadBalancers
  2. CoreOS OVA must be uploaded to vCenter as a template.

Installation Process

git clone https://github.com/ibm-cloud-architecture/terraform-openshift4-vmware
cd terraform-openshift4-vmware

Update your terraform.tfvars with your environment values. See terraform.tfvars.example

terraform init
terraform plan
terraform apply

terraform variables

Variable Description Type Default
vsphere_server FQDN or IP Address of your vSphere Server string -
vsphere_user vSphere username string -
vsphere_password vSphere password string -
vsphere_datacenter vSphere Datacenter where OpenShift will be deployed string -
vsphere_cluster vSphere Cluster where OpenShift will be deployed string -
vsphere_datastore vSphere Datastore for OpenShift nodes string -
vm_template Name of CoreOS OVA template from prereq #2 string -
vm_network vSphere Network for OpenShift nodes string -
vm_dns_addresses List of DNS servers to use for your OpenShift Nodes list 8.8.8.8, 8.8.4.4
vm_gateway IP Address of default gateway. If not set, defaults to first host in machine_cidr string null
cluster_id This cluster id must be of max length 27 and must have only alphanumeric or hyphen characters. string -
base_domain Base domain for your OpenShift Cluster string -
machine_cidr CIDR for your CoreOS VMs in subnet/mask format. string -
bootstrap_ip_address IP Address for bootstrap node string -
control_plane_ip_addresses List of IP addresses for your control plane nodes list -
control_plane_count Number of control plane VMs to create string 3
control_plane_memory Memory, in MB, to allocate to control plane VMs string 16384
control_plane_num_cpus Number of CPUs to allocate for control plane VMs string 4
compute_ip_addresses List of IP addresses for your compute nodes list -
compute_count Number of compute VMs to create string 3
compute_memory Memory, in MB, to allocate to compute VMs string 8192
compute_num_cpus Number of CPUs to allocate for compute VMs string 3
storage_ip_addresses List of IP addresses for your storage nodes list Empty
storage_count Number of storage VMs to create string 0
storage_memory Memory, in MB to allocate to storage VMs string 65536
storage_num_cpus Number of CPUs to allocate for storage VMs string 16
openshift_pull_secret Path to your OpenShift pull secret string -
openshift_cluster_cidr CIDR for pods in the OpenShift SDN string 10.128.0.0/14
openshift_service_cidr CIDR for services in the OpenShift SDN string 172.30.0.0/16
openshift_host_prefix Controls the number of pods to allocate to each node from the openshift_cluster_cidr CIDR. For example, 23 would allocate 2^(32-23) 512 pods to each node. string 23
openshift_version Version of OpenShift to install. 4.6 or later. string 4.6
create_openshift_vips Create the ingressVIP and apiVIP on nodes (same as IPI). bool true
openshift_api_virtualip The IP Address that will be used for the api LoadBalanced endpoint. Must be on the same CIDR range as the master nodes string -
openshift_ingress_virtualip The IP Address that will be used for the *.apps LoadBalanced endpoint. Must be on the same CIDR range as the worker nodes string -