Red Hat OpenShift Container Platform

Creating a primary network attachment by applying a YAML manifest

Create a primary network attachment by directly applying a NetworkAttachmentDefinition YAML manifest. This gives you full control over the network configuration without relying on the Cluster Network Operator to manage the resource automatically.

Prerequisites

You have installed the OpenShift CLI (oc).
You have logged in as a user with cluster-admin privileges.
You are working in the namespace where the NAD is to be deployed.

Procedure

Create a YAML file with your primary network configuration, such as in the following example:

apiVersion: k8s.cni.cncf.io/v1
kind: NetworkAttachmentDefinition
metadata:
  name: next-net
spec:
  config: |-
    {
      "cniVersion": "0.3.1",
      "name": "work-network",
      "namespace": "namespace2",
      "type": "host-device",
      "device": "eth1",
      "ipam": {
        "type": "dhcp"
      }
    }

Optional: You can specify a namespace to which the NAD is applied. If you are working in the namespace where the NAD is to be deployed, the namespace specification is not necessary.

To create the primary network, enter the following command:
```
$ oc apply -f <file>.yaml
```
where:

<file>

Specifies the name of the file contained the YAML manifest.