红帽全球峰会3.2.10.4. Notes
The Ingress Operator sets up the router in the openshift-ingress project and creates the deployment for the router:
$ oc get deployment -n openshift-ingress
The Ingress Operator uses the clusterNetwork[].cidr from the network/cluster status to determine what mode (IPv4, IPv6, or dual stack) the managed Ingress Controller (router) should operate in. For example, if clusterNetwork contains only a v6 cidr, then the Ingress Controller operates in IPv6-only mode.
In the following example, Ingress Controllers managed by the Ingress Operator will run in IPv4-only mode because only one cluster network exists and the network is an IPv4 cidr:
$ oc get network/cluster -o jsonpath='{.status.clusterNetwork[*]}'Example output
map[cidr:10.128.0.0/14 hostPrefix:23]
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