MGMT-21314: CNO enable advanced gateway detection in ovnkube in dpu host mode

Author: tsorya

bindata/network/ovn-kubernetes/common/008-script-lib.yaml

@@ -512,11 +512,13 @@ data:
 
       echo "I$(date "+%m%d %H:%M:%S.%N") - starting ovnkube-node"
 
-
-      if [ "{{.OVN_NODE_MODE}}" == "dpu-host" ]; then
+      # Use OVN_NODE_MODE environment variable, default to "full" if not set
+      OVN_NODE_MODE=${OVN_NODE_MODE:-full}
+      if [ "${OVN_NODE_MODE}" == "dpu-host" ]; then
         // this is required for the dpu-host mode to configure right gateway interface
         // https://github.com/ovn-kubernetes/ovn-kubernetes/pull/5327/files
         gateway_interface=derive-from-mgmt-port
+        ovnkube_node_mode="--ovnkube-node-mode dpu-host"
       else
         gateway_interface=br-ex
       fi
@@ -664,9 +666,7 @@ data:
         --inactivity-probe="${OVN_CONTROLLER_INACTIVITY_PROBE}" \
         ${gateway_mode_flags} \
         ${node_mgmt_port_netdev_flags} \
-{{- if eq .OVN_NODE_MODE "dpu-host" }}
-        --ovnkube-node-mode dpu-host \
-{{- end }}
+        ${ovnkube_node_mode} \
         --metrics-bind-address "127.0.0.1:${metrics_port}" \
         --ovn-metrics-bind-address "127.0.0.1:${ovn_metrics_port}" \
         --metrics-enable-pprof \

bindata/network/ovn-kubernetes/managed/ovnkube-node.yaml

@@ -394,6 +394,8 @@ spec:
           value: "{{.OVN_CONTROLLER_INACTIVITY_PROBE}}"
         - name: OVN_KUBE_LOG_LEVEL
           value: "4"
+        - name: OVN_NODE_MODE
+          value: "{{.OVN_NODE_MODE}}"
         {{ if .NetFlowCollectors }}
         - name: NETFLOW_COLLECTORS
           value: "{{.NetFlowCollectors}}"

bindata/network/ovn-kubernetes/self-hosted/ovnkube-node.yaml

@@ -538,6 +538,8 @@ spec:
           value: "{{.OVN_CONTROLLER_INACTIVITY_PROBE}}"
         - name: OVN_KUBE_LOG_LEVEL
           value: "4"
+        - name: OVN_NODE_MODE
+          value: "{{.OVN_NODE_MODE}}"
         {{ if .NetFlowCollectors }}
         - name: NETFLOW_COLLECTORS
           value: "{{.NetFlowCollectors}}"
@@ -566,6 +568,7 @@ spec:
         - name: OVNKUBE_NODE_MGMT_PORT_DP_RESOURCE_NAME
           value: {{ .MgmtPortResourceName }}
         {{ end }}
+        {{ end }}
         - name: K8S_NODE
           valueFrom:
             fieldRef: