4.11.3.2. Creating the Kubernetes manifest and Ignition config files

Procedure

1. Generate the Kubernetes manifests for the cluster:

   $ ./openshift-install create manifests --dir=<installation_directory> 1

   Example output

   INFO Consuming Install Config from target directory
   WARNING Making control-plane schedulable by setting MastersSchedulable to true for Scheduler cluster settings

   1

   For <installation_directory>, specify the installation directory that contains the install-config.yaml file you created.

   Because you create your own compute machines later in the installation process, you can safely ignore this warning.

2. Remove the Kubernetes manifest files that define the control plane machines:

   $ rm -f <installation_directory>/openshift/99_openshift-cluster-api_master-machines-*.yaml

   By removing these files, you prevent the cluster from automatically generating control plane machines.

3. Optional: If you do not want the cluster to provision compute machines, remove the Kubernetes manifest files that define the worker machines:

   $ rm -f <installation_directory>/openshift/99_openshift-cluster-api_worker-machineset-*.yaml

   Because you create and manage the worker machines yourself, you do not need to initialize these machines.

4. Modify the <installation_directory>/manifests/cluster-scheduler-02-config.yml Kubernetes manifest file to prevent pods from being scheduled on the control plane machines:

   1. Open the <installation_directory>/manifests/cluster-scheduler-02-config.yml file.
   2. Locate the mastersSchedulable parameter and set its value to False.
   3. Save and exit the file.

5. Optional: If you do not want the Ingress Operator to create DNS records on your behalf, remove the privateZone and publicZone sections from the <installation_directory>/manifests/cluster-dns-02-config.yml DNS configuration file:

   apiVersion: config.openshift.io/v1
   kind: DNS
   metadata:
     creationTimestamp: null
     name: cluster
   spec:
     baseDomain: example.openshift.com
     privateZone: 1
       id: mycluster-100419-private-zone
     publicZone: 2
       id: example.openshift.com
   status: {}

   1 2

   Remove this section completely.

   If you do so, you must add ingress DNS records manually in a later step.

6. Obtain the Ignition config files:

   $ ./openshift-install create ignition-configs --dir=<installation_directory> 1

   1

   For <installation_directory>, specify the same installation directory.

   The following files are generated in the directory:

   .
   ├── auth
   │   ├── kubeadmin-password
   │   └── kubeconfig
   ├── bootstrap.ign
   ├── master.ign
   ├── metadata.json
   └── worker.ign