4.5.6. Modifying advanced network configuration parameters

Procedure

1. Use the following command to create manifests:

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

   1

   For <installation_directory>, specify the name of the directory that contains the install-config.yaml file for your cluster.

2. Create a file that is named cluster-network-03-config.yml in the <installation_directory>/manifests/ directory:

   $ touch <installation_directory>/manifests/cluster-network-03-config.yml 1

   1

   For <installation_directory>, specify the directory name that contains the manifests/ directory for your cluster.

   After creating the file, several network configuration files are in the manifests/ directory, as shown:

   $ ls <installation_directory>/manifests/cluster-network-*

   Example output

   cluster-network-01-crd.yml
   cluster-network-02-config.yml
   cluster-network-03-config.yml

3. Open the cluster-network-03-config.yml file in an editor and enter a CR that describes the Operator configuration you want:

   apiVersion: operator.openshift.io/v1
   kind: Network
   metadata:
     name: cluster
   spec: 1
     clusterNetwork:
     - cidr: 10.128.0.0/14
       hostPrefix: 23
     serviceNetwork:
     - 172.30.0.0/16
     defaultNetwork:
       type: OpenShiftSDN
       openshiftSDNConfig:
         mode: NetworkPolicy
         mtu: 1450
         vxlanPort: 4789

   1

   The parameters for the spec parameter are only an example. Specify your configuration for the Cluster Network Operator in the CR.

   The CNO provides default values for the parameters in the CR, so you must specify only the parameters that you want to change.

4. Save the cluster-network-03-config.yml file and quit the text editor.
5. Optional: Back up the manifests/cluster-network-03-config.yml file. The installation program deletes the manifests/ directory when creating the cluster.